<?xml version="1.0" encoding="UTF-8"?>

<!--XBRL Document Created with the Workiva Platform-->
<!--Copyright 2025 Workiva-->
<!--r:1466bf95-1182-4cd9-a428-0583485b43b3,g:507b8950-ca35-47c9-bafd-31021bb3c2d7-->
<link:linkbase xmlns:link="http://www.xbrl.org/2003/linkbase" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.xbrl.org/2003/linkbase http://www.xbrl.org/2003/xbrl-linkbase-2003-12-31.xsd">
  <link:roleRef roleURI="http://www.cbiz.com/role/CONDENSEDCONSOLIDATEDBALANCESHEETSUnaudited" xlink:type="simple" xlink:href="cbz-20250930.xsd#CONDENSEDCONSOLIDATEDBALANCESHEETSUnaudited"/>
  <link:calculationLink xlink:role="http://www.cbiz.com/role/CONDENSEDCONSOLIDATEDBALANCESHEETSUnaudited" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_cbz_CurrentLiabilitiesBeforeClientFundObligations_9e82c5ef-94bc-4aec-9d34-cb5f645276be" xlink:href="cbz-20250930.xsd#cbz_CurrentLiabilitiesBeforeClientFundObligations"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccountsPayableCurrent_6ae65a98-029b-44c4-b4fa-583c50fe069d" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AccountsPayableCurrent"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_cbz_CurrentLiabilitiesBeforeClientFundObligations_9e82c5ef-94bc-4aec-9d34-cb5f645276be" xlink:to="loc_us-gaap_AccountsPayableCurrent_6ae65a98-029b-44c4-b4fa-583c50fe069d" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccruedIncomeTaxesCurrent_a3655ab4-3683-4737-8d81-bd0872e07de6" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AccruedIncomeTaxesCurrent"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_cbz_CurrentLiabilitiesBeforeClientFundObligations_9e82c5ef-94bc-4aec-9d34-cb5f645276be" xlink:to="loc_us-gaap_AccruedIncomeTaxesCurrent_a3655ab4-3683-4737-8d81-bd0872e07de6" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EmployeeRelatedLiabilitiesCurrent_7046ff29-6aa2-4772-8970-f2be4701649c" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EmployeeRelatedLiabilitiesCurrent"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_cbz_CurrentLiabilitiesBeforeClientFundObligations_9e82c5ef-94bc-4aec-9d34-cb5f645276be" xlink:to="loc_us-gaap_EmployeeRelatedLiabilitiesCurrent_7046ff29-6aa2-4772-8970-f2be4701649c" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationContingentConsiderationLiabilityCurrent_b7cf8d41-dae5-42a7-bd7d-9d535c3c2f41" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_BusinessCombinationContingentConsiderationLiabilityCurrent"/>
    <link:calculationArc order="4" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_cbz_CurrentLiabilitiesBeforeClientFundObligations_9e82c5ef-94bc-4aec-9d34-cb5f645276be" xlink:to="loc_us-gaap_BusinessCombinationContingentConsiderationLiabilityCurrent_b7cf8d41-dae5-42a7-bd7d-9d535c3c2f41" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingLeaseLiabilityCurrent_775321f4-324c-4d01-b42e-2272f3ef08ec" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OperatingLeaseLiabilityCurrent"/>
    <link:calculationArc order="5" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_cbz_CurrentLiabilitiesBeforeClientFundObligations_9e82c5ef-94bc-4aec-9d34-cb5f645276be" xlink:to="loc_us-gaap_OperatingLeaseLiabilityCurrent_775321f4-324c-4d01-b42e-2272f3ef08ec" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherLiabilitiesCurrent_1f8449a3-a2de-4e1d-b563-643ab655058d" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OtherLiabilitiesCurrent"/>
    <link:calculationArc order="6" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_cbz_CurrentLiabilitiesBeforeClientFundObligations_9e82c5ef-94bc-4aec-9d34-cb5f645276be" xlink:to="loc_us-gaap_OtherLiabilitiesCurrent_1f8449a3-a2de-4e1d-b563-643ab655058d" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermDebtCurrent_1b2cabdb-9691-4cce-9dd9-f63399fc8bc5" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LongTermDebtCurrent"/>
    <link:calculationArc order="7" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_cbz_CurrentLiabilitiesBeforeClientFundObligations_9e82c5ef-94bc-4aec-9d34-cb5f645276be" xlink:to="loc_us-gaap_LongTermDebtCurrent_1b2cabdb-9691-4cce-9dd9-f63399fc8bc5" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Liabilities_c83ba87b-b33d-46a8-a34a-c1241d077876" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_Liabilities"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LiabilitiesCurrent_f066046f-09ea-42c9-8e33-1281480e49ae" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LiabilitiesCurrent"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Liabilities_c83ba87b-b33d-46a8-a34a-c1241d077876" xlink:to="loc_us-gaap_LiabilitiesCurrent_f066046f-09ea-42c9-8e33-1281480e49ae" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LiabilitiesNoncurrent_20f30a23-556e-45ac-ab47-2b192f5dd31a" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LiabilitiesNoncurrent"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Liabilities_c83ba87b-b33d-46a8-a34a-c1241d077876" xlink:to="loc_us-gaap_LiabilitiesNoncurrent_20f30a23-556e-45ac-ab47-2b192f5dd31a" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LiabilitiesNoncurrent_75401ee1-fcc4-4c0a-8322-4d44c8eecba4" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LiabilitiesNoncurrent"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermDebtNoncurrent_cad71877-1383-448b-8ee6-f9652487af7b" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LongTermDebtNoncurrent"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LiabilitiesNoncurrent_75401ee1-fcc4-4c0a-8322-4d44c8eecba4" xlink:to="loc_us-gaap_LongTermDebtNoncurrent_cad71877-1383-448b-8ee6-f9652487af7b" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccruedIncomeTaxesNoncurrent_ce3f961e-8122-4769-83ae-f2c2484026ac" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AccruedIncomeTaxesNoncurrent"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LiabilitiesNoncurrent_75401ee1-fcc4-4c0a-8322-4d44c8eecba4" xlink:to="loc_us-gaap_AccruedIncomeTaxesNoncurrent_ce3f961e-8122-4769-83ae-f2c2484026ac" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredIncomeTaxLiabilitiesNet_46dd5922-d893-4ca3-9c12-431dc6582c8c" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DeferredIncomeTaxLiabilitiesNet"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LiabilitiesNoncurrent_75401ee1-fcc4-4c0a-8322-4d44c8eecba4" xlink:to="loc_us-gaap_DeferredIncomeTaxLiabilitiesNet_46dd5922-d893-4ca3-9c12-431dc6582c8c" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredCompensationLiabilityClassifiedNoncurrent_c68fc6e8-05ec-4dfb-a35f-4c3b37b36665" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DeferredCompensationLiabilityClassifiedNoncurrent"/>
    <link:calculationArc order="4" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LiabilitiesNoncurrent_75401ee1-fcc4-4c0a-8322-4d44c8eecba4" xlink:to="loc_us-gaap_DeferredCompensationLiabilityClassifiedNoncurrent_c68fc6e8-05ec-4dfb-a35f-4c3b37b36665" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationContingentConsiderationLiabilityNoncurrent_69bc2fb9-4bf8-43c4-a639-6118b633446e" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_BusinessCombinationContingentConsiderationLiabilityNoncurrent"/>
    <link:calculationArc order="5" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LiabilitiesNoncurrent_75401ee1-fcc4-4c0a-8322-4d44c8eecba4" xlink:to="loc_us-gaap_BusinessCombinationContingentConsiderationLiabilityNoncurrent_69bc2fb9-4bf8-43c4-a639-6118b633446e" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingLeaseLiabilityNoncurrent_d9ff5212-f8c6-47c6-b445-1da2a096b3e4" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OperatingLeaseLiabilityNoncurrent"/>
    <link:calculationArc order="6" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LiabilitiesNoncurrent_75401ee1-fcc4-4c0a-8322-4d44c8eecba4" xlink:to="loc_us-gaap_OperatingLeaseLiabilityNoncurrent_d9ff5212-f8c6-47c6-b445-1da2a096b3e4" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherLiabilitiesNoncurrent_27d61d9b-3ff4-4f11-bd4a-c34840d46325" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OtherLiabilitiesNoncurrent"/>
    <link:calculationArc order="7" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LiabilitiesNoncurrent_75401ee1-fcc4-4c0a-8322-4d44c8eecba4" xlink:to="loc_us-gaap_OtherLiabilitiesNoncurrent_27d61d9b-3ff4-4f11-bd4a-c34840d46325" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockholdersEquity_ac60f9a5-6546-485c-81f5-64468484d083" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StockholdersEquity"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockValue_a580f5d0-ca6e-4860-935a-65835d4ec690" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CommonStockValue"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_StockholdersEquity_ac60f9a5-6546-485c-81f5-64468484d083" xlink:to="loc_us-gaap_CommonStockValue_a580f5d0-ca6e-4860-935a-65835d4ec690" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AdditionalPaidInCapitalCommonStock_742a1420-fafe-4d35-b73e-3b4d7beb6438" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AdditionalPaidInCapitalCommonStock"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_StockholdersEquity_ac60f9a5-6546-485c-81f5-64468484d083" xlink:to="loc_us-gaap_AdditionalPaidInCapitalCommonStock_742a1420-fafe-4d35-b73e-3b4d7beb6438" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RetainedEarningsAccumulatedDeficit_ea98aad5-ffd5-4b45-b627-61e8b2983baf" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RetainedEarningsAccumulatedDeficit"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_StockholdersEquity_ac60f9a5-6546-485c-81f5-64468484d083" xlink:to="loc_us-gaap_RetainedEarningsAccumulatedDeficit_ea98aad5-ffd5-4b45-b627-61e8b2983baf" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TreasuryStockCommonValue_220cbb26-28f5-42cd-8969-0225197884e0" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_TreasuryStockCommonValue"/>
    <link:calculationArc order="4" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_StockholdersEquity_ac60f9a5-6546-485c-81f5-64468484d083" xlink:to="loc_us-gaap_TreasuryStockCommonValue_220cbb26-28f5-42cd-8969-0225197884e0" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax_7a2961f8-45c7-48f3-ac10-01ee48cbcfbd" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax"/>
    <link:calculationArc order="5" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_StockholdersEquity_ac60f9a5-6546-485c-81f5-64468484d083" xlink:to="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax_7a2961f8-45c7-48f3-ac10-01ee48cbcfbd" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AssetsNoncurrent_2b9e523f-6088-47e2-b5a2-a6c3e79cc455" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AssetsNoncurrent"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentNet_f43b3fb2-f751-43e3-a0f3-c06a9650deb1" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PropertyPlantAndEquipmentNet"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_AssetsNoncurrent_2b9e523f-6088-47e2-b5a2-a6c3e79cc455" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentNet_f43b3fb2-f751-43e3-a0f3-c06a9650deb1" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IntangibleAssetsNetIncludingGoodwill_49668917-f7dc-4380-a761-8a42609a2905" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IntangibleAssetsNetIncludingGoodwill"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_AssetsNoncurrent_2b9e523f-6088-47e2-b5a2-a6c3e79cc455" xlink:to="loc_us-gaap_IntangibleAssetsNetIncludingGoodwill_49668917-f7dc-4380-a761-8a42609a2905" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredCompensationPlanAssets_aef4fc4d-f004-4b51-854e-65b6b07fb8ac" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DeferredCompensationPlanAssets"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_AssetsNoncurrent_2b9e523f-6088-47e2-b5a2-a6c3e79cc455" xlink:to="loc_us-gaap_DeferredCompensationPlanAssets_aef4fc4d-f004-4b51-854e-65b6b07fb8ac" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingLeaseRightOfUseAsset_314c8c24-ceca-4c8a-a926-26df83c37522" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OperatingLeaseRightOfUseAsset"/>
    <link:calculationArc order="4" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_AssetsNoncurrent_2b9e523f-6088-47e2-b5a2-a6c3e79cc455" xlink:to="loc_us-gaap_OperatingLeaseRightOfUseAsset_314c8c24-ceca-4c8a-a926-26df83c37522" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherAssetsNoncurrent_6337af42-bac4-4256-8ac8-f7394dcaa226" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OtherAssetsNoncurrent"/>
    <link:calculationArc order="5" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_AssetsNoncurrent_2b9e523f-6088-47e2-b5a2-a6c3e79cc455" xlink:to="loc_us-gaap_OtherAssetsNoncurrent_6337af42-bac4-4256-8ac8-f7394dcaa226" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Assets_a76576d8-0094-49bb-8f04-02f2b7e49ea7" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_Assets"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AssetsCurrent_37f86b61-917c-4331-80fb-93b1c39ebb84" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AssetsCurrent"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Assets_a76576d8-0094-49bb-8f04-02f2b7e49ea7" xlink:to="loc_us-gaap_AssetsCurrent_37f86b61-917c-4331-80fb-93b1c39ebb84" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AssetsNoncurrent_51aebe8a-584b-423d-b238-8b565f264db2" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AssetsNoncurrent"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Assets_a76576d8-0094-49bb-8f04-02f2b7e49ea7" xlink:to="loc_us-gaap_AssetsNoncurrent_51aebe8a-584b-423d-b238-8b565f264db2" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AssetsCurrent_bba5a35c-6426-4f5d-be14-555f2fa8d397" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AssetsCurrent"/>
    <link:loc xlink:type="locator" xlink:label="loc_cbz_CurrentAssetsBeforeFundsHeldForClients_ef3105f6-b3c1-4692-9609-c5735922e4f7" xlink:href="cbz-20250930.xsd#cbz_CurrentAssetsBeforeFundsHeldForClients"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_AssetsCurrent_bba5a35c-6426-4f5d-be14-555f2fa8d397" xlink:to="loc_cbz_CurrentAssetsBeforeFundsHeldForClients_ef3105f6-b3c1-4692-9609-c5735922e4f7" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FundsHeldForClients_ca207337-a8f9-431d-b616-77008d095105" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FundsHeldForClients"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_AssetsCurrent_bba5a35c-6426-4f5d-be14-555f2fa8d397" xlink:to="loc_us-gaap_FundsHeldForClients_ca207337-a8f9-431d-b616-77008d095105" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_cbz_CurrentAssetsBeforeFundsHeldForClients_eeb13d26-69c6-477c-8588-a8a91d107f37" xlink:href="cbz-20250930.xsd#cbz_CurrentAssetsBeforeFundsHeldForClients"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CashAndCashEquivalentsAtCarryingValue_cc058924-10e1-454f-83cb-45baae69dc5b" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CashAndCashEquivalentsAtCarryingValue"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_cbz_CurrentAssetsBeforeFundsHeldForClients_eeb13d26-69c6-477c-8588-a8a91d107f37" xlink:to="loc_us-gaap_CashAndCashEquivalentsAtCarryingValue_cc058924-10e1-454f-83cb-45baae69dc5b" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestrictedCashCurrent_8937efa2-7508-405a-a0a8-523129f25de9" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RestrictedCashCurrent"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_cbz_CurrentAssetsBeforeFundsHeldForClients_eeb13d26-69c6-477c-8588-a8a91d107f37" xlink:to="loc_us-gaap_RestrictedCashCurrent_8937efa2-7508-405a-a0a8-523129f25de9" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccountsReceivableNetCurrent_09ab5b64-47d9-4d3c-9457-787a8f4c86a7" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AccountsReceivableNetCurrent"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_cbz_CurrentAssetsBeforeFundsHeldForClients_eeb13d26-69c6-477c-8588-a8a91d107f37" xlink:to="loc_us-gaap_AccountsReceivableNetCurrent_09ab5b64-47d9-4d3c-9457-787a8f4c86a7" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherAssetsCurrent_c1c373ee-0f14-4e92-a016-010645374e31" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OtherAssetsCurrent"/>
    <link:calculationArc order="4" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_cbz_CurrentAssetsBeforeFundsHeldForClients_eeb13d26-69c6-477c-8588-a8a91d107f37" xlink:to="loc_us-gaap_OtherAssetsCurrent_c1c373ee-0f14-4e92-a016-010645374e31" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LiabilitiesAndStockholdersEquity_80e88ed8-d390-4d1f-9c24-a96bf0a5ba6d" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LiabilitiesAndStockholdersEquity"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Liabilities_3b5ac707-cd1a-4d33-a20b-361393927038" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_Liabilities"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquity_80e88ed8-d390-4d1f-9c24-a96bf0a5ba6d" xlink:to="loc_us-gaap_Liabilities_3b5ac707-cd1a-4d33-a20b-361393927038" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockholdersEquity_2e81572a-82f6-433c-b4d9-ae4064c952eb" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StockholdersEquity"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquity_80e88ed8-d390-4d1f-9c24-a96bf0a5ba6d" xlink:to="loc_us-gaap_StockholdersEquity_2e81572a-82f6-433c-b4d9-ae4064c952eb" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LiabilitiesCurrent_082b8798-f43a-47a1-beb8-05b1b98550a6" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LiabilitiesCurrent"/>
    <link:loc xlink:type="locator" xlink:label="loc_cbz_CurrentLiabilitiesBeforeClientFundObligations_fc7b4497-06c6-438c-8c77-cf5e59ab13cb" xlink:href="cbz-20250930.xsd#cbz_CurrentLiabilitiesBeforeClientFundObligations"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LiabilitiesCurrent_082b8798-f43a-47a1-beb8-05b1b98550a6" xlink:to="loc_cbz_CurrentLiabilitiesBeforeClientFundObligations_fc7b4497-06c6-438c-8c77-cf5e59ab13cb" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_cbz_ClientFundObligations_e6a0138b-8328-41bf-a711-4c1fc6b26ef1" xlink:href="cbz-20250930.xsd#cbz_ClientFundObligations"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LiabilitiesCurrent_082b8798-f43a-47a1-beb8-05b1b98550a6" xlink:to="loc_cbz_ClientFundObligations_e6a0138b-8328-41bf-a711-4c1fc6b26ef1" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://www.cbiz.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFCOMPREHENSIVEINCOMEUnaudited" xlink:type="simple" xlink:href="cbz-20250930.xsd#CONDENSEDCONSOLIDATEDSTATEMENTSOFCOMPREHENSIVEINCOMEUnaudited"/>
  <link:calculationLink xlink:role="http://www.cbiz.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFCOMPREHENSIVEINCOMEUnaudited" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetIncomeLoss_f240b2b1-09e3-4fe0-9300-fdc5f739423b" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_NetIncomeLoss"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxExpenseBenefit_8fd4ac82-fbba-4eef-8a92-3b18909d649f" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncomeTaxExpenseBenefit"/>
    <link:calculationArc order="1" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetIncomeLoss_f240b2b1-09e3-4fe0-9300-fdc5f739423b" xlink:to="loc_us-gaap_IncomeTaxExpenseBenefit_8fd4ac82-fbba-4eef-8a92-3b18909d649f" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_65578496-aa32-4318-8139-ad3b9144adc2" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetIncomeLoss_f240b2b1-09e3-4fe0-9300-fdc5f739423b" xlink:to="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_65578496-aa32-4318-8139-ad3b9144adc2" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NonoperatingIncomeExpense_4182ae3c-082e-4970-9862-514c366d471b" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_NonoperatingIncomeExpense"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InterestExpenseNonoperating_fcb7f569-cbf4-45eb-aa53-1958ea1566e9" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InterestExpenseNonoperating"/>
    <link:calculationArc order="1" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NonoperatingIncomeExpense_4182ae3c-082e-4970-9862-514c366d471b" xlink:to="loc_us-gaap_InterestExpenseNonoperating_fcb7f569-cbf4-45eb-aa53-1958ea1566e9" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherNonoperatingIncomeExpense_2b366998-f886-4631-bf9d-29146c5e12f0" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OtherNonoperatingIncomeExpense"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NonoperatingIncomeExpense_4182ae3c-082e-4970-9862-514c366d471b" xlink:to="loc_us-gaap_OtherNonoperatingIncomeExpense_2b366998-f886-4631-bf9d-29146c5e12f0" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DisposalGroupNotDiscontinuedOperationGainLossOnDisposal_2988d156-57ae-426f-8562-e018a9c3492b" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DisposalGroupNotDiscontinuedOperationGainLossOnDisposal"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NonoperatingIncomeExpense_4182ae3c-082e-4970-9862-514c366d471b" xlink:to="loc_us-gaap_DisposalGroupNotDiscontinuedOperationGainLossOnDisposal_2988d156-57ae-426f-8562-e018a9c3492b" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ComprehensiveIncomeNetOfTax_d07365d4-4f38-40a2-a9e5-d167eb8d0eeb" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ComprehensiveIncomeNetOfTax"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetIncomeLoss_5e7fd2ac-77b0-4490-bec9-5065c5814c9c" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_NetIncomeLoss"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_ComprehensiveIncomeNetOfTax_d07365d4-4f38-40a2-a9e5-d167eb8d0eeb" xlink:to="loc_us-gaap_NetIncomeLoss_5e7fd2ac-77b0-4490-bec9-5065c5814c9c" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent_df47eda0-3514-4ee6-b1d1-07e88f3454f2" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_ComprehensiveIncomeNetOfTax_d07365d4-4f38-40a2-a9e5-d167eb8d0eeb" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent_df47eda0-3514-4ee6-b1d1-07e88f3454f2" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GrossProfit_e7c171c3-5b57-42b6-b488-74461631d17a" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_GrossProfit"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_278dae99-f3e3-4284-8dc1-5e95859ae723" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_GrossProfit_e7c171c3-5b57-42b6-b488-74461631d17a" xlink:to="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_278dae99-f3e3-4284-8dc1-5e95859ae723" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CostOfRevenue_ebda4a98-6b48-4878-9fde-b3db6b94f975" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CostOfRevenue"/>
    <link:calculationArc order="2" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_GrossProfit_e7c171c3-5b57-42b6-b488-74461631d17a" xlink:to="loc_us-gaap_CostOfRevenue_ebda4a98-6b48-4878-9fde-b3db6b94f975" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_7ac29c3a-2fc5-4396-aadc-0ff885c44bbb" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingIncomeLoss_5bc57358-65e5-4d16-96ef-e38f394192a3" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OperatingIncomeLoss"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_7ac29c3a-2fc5-4396-aadc-0ff885c44bbb" xlink:to="loc_us-gaap_OperatingIncomeLoss_5bc57358-65e5-4d16-96ef-e38f394192a3" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NonoperatingIncomeExpense_0a53f8ea-6912-4c30-9a02-d0d5f76a586f" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_NonoperatingIncomeExpense"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_7ac29c3a-2fc5-4396-aadc-0ff885c44bbb" xlink:to="loc_us-gaap_NonoperatingIncomeExpense_0a53f8ea-6912-4c30-9a02-d0d5f76a586f" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingIncomeLoss_58d30a7e-911f-4b81-b983-c384b128b5c1" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OperatingIncomeLoss"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GeneralAndAdministrativeExpense_e2aa3f0b-40a0-42d4-a1e2-2af5a474c8a6" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_GeneralAndAdministrativeExpense"/>
    <link:calculationArc order="1" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_OperatingIncomeLoss_58d30a7e-911f-4b81-b983-c384b128b5c1" xlink:to="loc_us-gaap_GeneralAndAdministrativeExpense_e2aa3f0b-40a0-42d4-a1e2-2af5a474c8a6" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GrossProfit_8fb80e7d-e499-491c-87b5-46a1eb52472a" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_GrossProfit"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_OperatingIncomeLoss_58d30a7e-911f-4b81-b983-c384b128b5c1" xlink:to="loc_us-gaap_GrossProfit_8fb80e7d-e499-491c-87b5-46a1eb52472a" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://www.cbiz.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFCASHFLOWSUnaudited" xlink:type="simple" xlink:href="cbz-20250930.xsd#CONDENSEDCONSOLIDATEDSTATEMENTSOFCASHFLOWSUnaudited"/>
  <link:calculationLink xlink:role="http://www.cbiz.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFCASHFLOWSUnaudited" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents_8fcbb60d-5bc7-418f-bb66-cc9dbc67f597" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestrictedCash_e56503b7-dc93-4abb-8c26-99a2f6b907d1" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RestrictedCash"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents_8fcbb60d-5bc7-418f-bb66-cc9dbc67f597" xlink:to="loc_us-gaap_RestrictedCash_e56503b7-dc93-4abb-8c26-99a2f6b907d1" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_cbz_CashEquivalentsIncludedInFundsHeldForClients_4d7b649b-ebf7-4024-aea4-2dff8bee471d" xlink:href="cbz-20250930.xsd#cbz_CashEquivalentsIncludedInFundsHeldForClients"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents_8fcbb60d-5bc7-418f-bb66-cc9dbc67f597" xlink:to="loc_cbz_CashEquivalentsIncludedInFundsHeldForClients_4d7b649b-ebf7-4024-aea4-2dff8bee471d" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CashAndCashEquivalentsAtCarryingValue_e6567615-dc97-45f4-bfa3-e37d4c480afa" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CashAndCashEquivalentsAtCarryingValue"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents_8fcbb60d-5bc7-418f-bb66-cc9dbc67f597" xlink:to="loc_us-gaap_CashAndCashEquivalentsAtCarryingValue_e6567615-dc97-45f4-bfa3-e37d4c480afa" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_c465ed51-5435-4bd5-bfdb-0a45a817c415" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_NetCashProvidedByUsedInOperatingActivities"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInAccountsReceivable_45406d73-1ad6-4840-ad59-f48bd41a79a0" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncreaseDecreaseInAccountsReceivable"/>
    <link:calculationArc order="1" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_c465ed51-5435-4bd5-bfdb-0a45a817c415" xlink:to="loc_us-gaap_IncreaseDecreaseInAccountsReceivable_45406d73-1ad6-4840-ad59-f48bd41a79a0" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredIncomeTaxesAndTaxCredits_d16bb7e7-6146-4c77-8d5b-32edd05334fd" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DeferredIncomeTaxesAndTaxCredits"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_c465ed51-5435-4bd5-bfdb-0a45a817c415" xlink:to="loc_us-gaap_DeferredIncomeTaxesAndTaxCredits_d16bb7e7-6146-4c77-8d5b-32edd05334fd" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_cbz_ProvisionForDoubtfulAccountsNetOfRecoveries_a21cba0b-c0cf-4c53-9b88-4f6a6b90ceb5" xlink:href="cbz-20250930.xsd#cbz_ProvisionForDoubtfulAccountsNetOfRecoveries"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_c465ed51-5435-4bd5-bfdb-0a45a817c415" xlink:to="loc_cbz_ProvisionForDoubtfulAccountsNetOfRecoveries_a21cba0b-c0cf-4c53-9b88-4f6a6b90ceb5" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DepreciationDepletionAndAmortization_b578ebdb-68cd-49f5-8154-6b82a514bc92" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DepreciationDepletionAndAmortization"/>
    <link:calculationArc order="4" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_c465ed51-5435-4bd5-bfdb-0a45a817c415" xlink:to="loc_us-gaap_DepreciationDepletionAndAmortization_b578ebdb-68cd-49f5-8154-6b82a514bc92" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetIncomeLoss_48a64b43-330b-4565-ab50-529b123a92a6" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_NetIncomeLoss"/>
    <link:calculationArc order="5" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_c465ed51-5435-4bd5-bfdb-0a45a817c415" xlink:to="loc_us-gaap_NetIncomeLoss_48a64b43-330b-4565-ab50-529b123a92a6" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensation_24077ffb-597c-4a88-803c-a1c7015ea04a" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensation"/>
    <link:calculationArc order="6" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_c465ed51-5435-4bd5-bfdb-0a45a817c415" xlink:to="loc_us-gaap_ShareBasedCompensation_24077ffb-597c-4a88-803c-a1c7015ea04a" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInOtherOperatingAssets_df51f5e7-c1eb-4a08-b0d1-fd6729366969" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncreaseDecreaseInOtherOperatingAssets"/>
    <link:calculationArc order="7" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_c465ed51-5435-4bd5-bfdb-0a45a817c415" xlink:to="loc_us-gaap_IncreaseDecreaseInOtherOperatingAssets_df51f5e7-c1eb-4a08-b0d1-fd6729366969" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationContingentConsiderationArrangementsChangeInAmountOfContingentConsiderationLiability1_a552b346-ef65-4642-9535-38a5b3cc3d85" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_BusinessCombinationContingentConsiderationArrangementsChangeInAmountOfContingentConsiderationLiability1"/>
    <link:calculationArc order="8" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_c465ed51-5435-4bd5-bfdb-0a45a817c415" xlink:to="loc_us-gaap_BusinessCombinationContingentConsiderationArrangementsChangeInAmountOfContingentConsiderationLiability1_a552b346-ef65-4642-9535-38a5b3cc3d85" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInEmployeeRelatedLiabilities_cf7a881e-83b5-4b3e-b2cf-df29dbf1c1a5" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncreaseDecreaseInEmployeeRelatedLiabilities"/>
    <link:calculationArc order="9" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_c465ed51-5435-4bd5-bfdb-0a45a817c415" xlink:to="loc_us-gaap_IncreaseDecreaseInEmployeeRelatedLiabilities_cf7a881e-83b5-4b3e-b2cf-df29dbf1c1a5" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherOperatingActivitiesCashFlowStatement_09a2f430-1c2d-48ae-aec5-955c55328f55" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OtherOperatingActivitiesCashFlowStatement"/>
    <link:calculationArc order="10" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_c465ed51-5435-4bd5-bfdb-0a45a817c415" xlink:to="loc_us-gaap_OtherOperatingActivitiesCashFlowStatement_09a2f430-1c2d-48ae-aec5-955c55328f55" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInAccruedIncomeTaxesPayable_b9ea0661-435f-4187-ba94-6ff05ed3e023" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncreaseDecreaseInAccruedIncomeTaxesPayable"/>
    <link:calculationArc order="11" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_c465ed51-5435-4bd5-bfdb-0a45a817c415" xlink:to="loc_us-gaap_IncreaseDecreaseInAccruedIncomeTaxesPayable_b9ea0661-435f-4187-ba94-6ff05ed3e023" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInOtherOperatingLiabilities_d7102c77-700a-4862-99f5-4ab916ff2b2c" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncreaseDecreaseInOtherOperatingLiabilities"/>
    <link:calculationArc order="12" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_c465ed51-5435-4bd5-bfdb-0a45a817c415" xlink:to="loc_us-gaap_IncreaseDecreaseInOtherOperatingLiabilities_d7102c77-700a-4862-99f5-4ab916ff2b2c" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInAccountsPayable_8a750680-9bf7-4f52-9a53-4cbadd9aa1bb" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncreaseDecreaseInAccountsPayable"/>
    <link:calculationArc order="13" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_c465ed51-5435-4bd5-bfdb-0a45a817c415" xlink:to="loc_us-gaap_IncreaseDecreaseInAccountsPayable_8a750680-9bf7-4f52-9a53-4cbadd9aa1bb" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DisposalGroupNotDiscontinuedOperationGainLossOnDisposal_53983a1b-f9df-46e2-b5c3-ae47dfe5fc67" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DisposalGroupNotDiscontinuedOperationGainLossOnDisposal"/>
    <link:calculationArc order="14" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_c465ed51-5435-4bd5-bfdb-0a45a817c415" xlink:to="loc_us-gaap_DisposalGroupNotDiscontinuedOperationGainLossOnDisposal_53983a1b-f9df-46e2-b5c3-ae47dfe5fc67" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_b2b020ba-76dd-48e1-a7c9-8402ec71d381" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_NetCashProvidedByUsedInFinancingActivities"/>
    <link:loc xlink:type="locator" xlink:label="loc_cbz_PaymentOfContingentConsiderationOfAcquisitions_184c70b8-014b-4cb2-8731-297565058868" xlink:href="cbz-20250930.xsd#cbz_PaymentOfContingentConsiderationOfAcquisitions"/>
    <link:calculationArc order="1" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_b2b020ba-76dd-48e1-a7c9-8402ec71d381" xlink:to="loc_cbz_PaymentOfContingentConsiderationOfAcquisitions_184c70b8-014b-4cb2-8731-297565058868" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_cbz_NetIncreaseDecreaseInClientFundsObligationsFinancing_15f4e7c6-3d54-493c-be22-453e36f41067" xlink:href="cbz-20250930.xsd#cbz_NetIncreaseDecreaseInClientFundsObligationsFinancing"/>
    <link:calculationArc order="2" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_b2b020ba-76dd-48e1-a7c9-8402ec71d381" xlink:to="loc_cbz_NetIncreaseDecreaseInClientFundsObligationsFinancing_15f4e7c6-3d54-493c-be22-453e36f41067" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RepaymentsOfLongTermLinesOfCredit_01180d89-b98a-4c53-8a30-3fee3b79946e" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RepaymentsOfLongTermLinesOfCredit"/>
    <link:calculationArc order="3" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_b2b020ba-76dd-48e1-a7c9-8402ec71d381" xlink:to="loc_us-gaap_RepaymentsOfLongTermLinesOfCredit_01180d89-b98a-4c53-8a30-3fee3b79946e" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProceedsFromLongTermLinesOfCredit_c060067e-f42e-4c15-8c00-4d422cb3e476" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ProceedsFromLongTermLinesOfCredit"/>
    <link:calculationArc order="4" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_b2b020ba-76dd-48e1-a7c9-8402ec71d381" xlink:to="loc_us-gaap_ProceedsFromLongTermLinesOfCredit_c060067e-f42e-4c15-8c00-4d422cb3e476" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentsRelatedToTaxWithholdingForShareBasedCompensation_c3265009-5950-4f93-b864-99510ee058aa" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PaymentsRelatedToTaxWithholdingForShareBasedCompensation"/>
    <link:calculationArc order="5" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_b2b020ba-76dd-48e1-a7c9-8402ec71d381" xlink:to="loc_us-gaap_PaymentsRelatedToTaxWithholdingForShareBasedCompensation_c3265009-5950-4f93-b864-99510ee058aa" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentsForRepurchaseOfCommonStock_55c55389-950e-4f14-b227-e829e5613851" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PaymentsForRepurchaseOfCommonStock"/>
    <link:calculationArc order="6" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_b2b020ba-76dd-48e1-a7c9-8402ec71d381" xlink:to="loc_us-gaap_PaymentsForRepurchaseOfCommonStock_55c55389-950e-4f14-b227-e829e5613851" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentsOfDebtIssuanceCosts_bce75cc6-f355-43d4-9f3f-e25bb6ed1a4f" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PaymentsOfDebtIssuanceCosts"/>
    <link:calculationArc order="7" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_b2b020ba-76dd-48e1-a7c9-8402ec71d381" xlink:to="loc_us-gaap_PaymentsOfDebtIssuanceCosts_bce75cc6-f355-43d4-9f3f-e25bb6ed1a4f" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProceedsFromPaymentsForOtherFinancingActivities_f64a2bf2-6f13-49e5-a55e-031bca259ca5" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ProceedsFromPaymentsForOtherFinancingActivities"/>
    <link:calculationArc order="8" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_b2b020ba-76dd-48e1-a7c9-8402ec71d381" xlink:to="loc_us-gaap_ProceedsFromPaymentsForOtherFinancingActivities_f64a2bf2-6f13-49e5-a55e-031bca259ca5" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_0caeeffe-3295-48d8-9c9d-bf783ca49e53" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_NetCashProvidedByUsedInInvestingActivities"/>
    <link:loc xlink:type="locator" xlink:label="loc_cbz_NetIncreaseDecreaseInFundsHeldForClientsInvesting_1296748f-2272-4f34-bc04-1d207a1bfbeb" xlink:href="cbz-20250930.xsd#cbz_NetIncreaseDecreaseInFundsHeldForClientsInvesting"/>
    <link:calculationArc order="1" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_0caeeffe-3295-48d8-9c9d-bf783ca49e53" xlink:to="loc_cbz_NetIncreaseDecreaseInFundsHeldForClientsInvesting_1296748f-2272-4f34-bc04-1d207a1bfbeb" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentsToAcquireBusinessesNetOfCashAcquired_dc257f57-cb4c-4df5-bef3-ad9ab30cf2f2" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PaymentsToAcquireBusinessesNetOfCashAcquired"/>
    <link:calculationArc order="2" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_0caeeffe-3295-48d8-9c9d-bf783ca49e53" xlink:to="loc_us-gaap_PaymentsToAcquireBusinessesNetOfCashAcquired_dc257f57-cb4c-4df5-bef3-ad9ab30cf2f2" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProceedsFromSaleMaturityAndCollectionsOfInvestments_e54b0c7c-d218-4052-b9f6-0ff9cdcdefef" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ProceedsFromSaleMaturityAndCollectionsOfInvestments"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_0caeeffe-3295-48d8-9c9d-bf783ca49e53" xlink:to="loc_us-gaap_ProceedsFromSaleMaturityAndCollectionsOfInvestments_e54b0c7c-d218-4052-b9f6-0ff9cdcdefef" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentsToAcquireInvestments_d75557f1-1bbb-41b5-8b48-ffa416f1b4a7" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PaymentsToAcquireInvestments"/>
    <link:calculationArc order="4" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_0caeeffe-3295-48d8-9c9d-bf783ca49e53" xlink:to="loc_us-gaap_PaymentsToAcquireInvestments_d75557f1-1bbb-41b5-8b48-ffa416f1b4a7" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProceedsFromDivestitureOfBusinesses_e34e41de-b423-4a28-b594-cc7a55f2efbd" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ProceedsFromDivestitureOfBusinesses"/>
    <link:calculationArc order="5" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_0caeeffe-3295-48d8-9c9d-bf783ca49e53" xlink:to="loc_us-gaap_ProceedsFromDivestitureOfBusinesses_e34e41de-b423-4a28-b594-cc7a55f2efbd" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentsForProceedsFromOtherInvestingActivities_c362cb05-fd0e-489a-a971-5b45390c0f60" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PaymentsForProceedsFromOtherInvestingActivities"/>
    <link:calculationArc order="6" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_0caeeffe-3295-48d8-9c9d-bf783ca49e53" xlink:to="loc_us-gaap_PaymentsForProceedsFromOtherInvestingActivities_c362cb05-fd0e-489a-a971-5b45390c0f60" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentsToAcquirePropertyPlantAndEquipment_5c9edb94-8e6f-4b1e-b632-92da36a34bef" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PaymentsToAcquirePropertyPlantAndEquipment"/>
    <link:calculationArc order="7" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_0caeeffe-3295-48d8-9c9d-bf783ca49e53" xlink:to="loc_us-gaap_PaymentsToAcquirePropertyPlantAndEquipment_5c9edb94-8e6f-4b1e-b632-92da36a34bef" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect_790e6a72-c082-4b06-9ed2-6d8d28896623" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_ae2c347f-8f86-4183-b01e-98f9e51b29b0" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_NetCashProvidedByUsedInOperatingActivities"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect_790e6a72-c082-4b06-9ed2-6d8d28896623" xlink:to="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_ae2c347f-8f86-4183-b01e-98f9e51b29b0" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_45701e4d-f419-4531-a266-7557ab922047" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_NetCashProvidedByUsedInInvestingActivities"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect_790e6a72-c082-4b06-9ed2-6d8d28896623" xlink:to="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_45701e4d-f419-4531-a266-7557ab922047" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_bfaad9f0-4d5d-4be6-b9c9-b0c1e24d6501" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_NetCashProvidedByUsedInFinancingActivities"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect_790e6a72-c082-4b06-9ed2-6d8d28896623" xlink:to="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_bfaad9f0-4d5d-4be6-b9c9-b0c1e24d6501" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://www.cbiz.com/role/BUSINESSCOMBINATIONSSummaryofRecognizedIdentifiedAssetsAcquiredandLiabilitiesAssumedDetails" xlink:type="simple" xlink:href="cbz-20250930.xsd#BUSINESSCOMBINATIONSSummaryofRecognizedIdentifiedAssetsAcquiredandLiabilitiesAssumedDetails"/>
  <link:calculationLink xlink:role="http://www.cbiz.com/role/BUSINESSCOMBINATIONSSummaryofRecognizedIdentifiedAssetsAcquiredandLiabilitiesAssumedDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNet_392b6686-9dbb-48f5-8f1b-f77ab875ca25" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNet"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLiabilities_1ffefa3b-d94d-40e0-851a-8e0aaf70e320" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLiabilities"/>
    <link:calculationArc order="1" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNet_392b6686-9dbb-48f5-8f1b-f77ab875ca25" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLiabilities_1ffefa3b-d94d-40e0-851a-8e0aaf70e320" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAssets_c951c80b-081f-4d96-a4f8-46a8f7110b23" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAssets"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNet_392b6686-9dbb-48f5-8f1b-f77ab875ca25" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAssets_c951c80b-081f-4d96-a4f8-46a8f7110b23" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAssets_7caed6c9-fb79-42fb-8bb2-9b2e6f836996" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAssets"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsReceivables_25eb1a2b-e7cb-4565-8017-ba4cb9209f58" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsReceivables"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAssets_7caed6c9-fb79-42fb-8bb2-9b2e6f836996" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsReceivables_25eb1a2b-e7cb-4565-8017-ba4cb9209f58" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_cbz_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsUnbilledRevenue_8706bb9a-1f1d-4f97-ad3e-fd491cb946f0" xlink:href="cbz-20250930.xsd#cbz_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsUnbilledRevenue"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAssets_7caed6c9-fb79-42fb-8bb2-9b2e6f836996" xlink:to="loc_cbz_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsUnbilledRevenue_8706bb9a-1f1d-4f97-ad3e-fd491cb946f0" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibleAssetsOtherThanGoodwill_c71ba856-8aad-4434-a4bb-3f3b556973a9" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibleAssetsOtherThanGoodwill"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAssets_7caed6c9-fb79-42fb-8bb2-9b2e6f836996" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibleAssetsOtherThanGoodwill_c71ba856-8aad-4434-a4bb-3f3b556973a9" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_cbz_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedRightOfUseAssets_b84c191f-5527-4352-b291-ad6af92f0399" xlink:href="cbz-20250930.xsd#cbz_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedRightOfUseAssets"/>
    <link:calculationArc order="4" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAssets_7caed6c9-fb79-42fb-8bb2-9b2e6f836996" xlink:to="loc_cbz_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedRightOfUseAssets_b84c191f-5527-4352-b291-ad6af92f0399" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedDeferredTaxAssets_c94e5227-dec6-47c2-89cc-551a564aa6de" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedDeferredTaxAssets"/>
    <link:calculationArc order="5" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAssets_7caed6c9-fb79-42fb-8bb2-9b2e6f836996" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedDeferredTaxAssets_c94e5227-dec6-47c2-89cc-551a564aa6de" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedPropertyPlantAndEquipment_029858a9-a619-4570-9d1d-ed1b56f4f2d3" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedPropertyPlantAndEquipment"/>
    <link:calculationArc order="6" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAssets_7caed6c9-fb79-42fb-8bb2-9b2e6f836996" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedPropertyPlantAndEquipment_029858a9-a619-4570-9d1d-ed1b56f4f2d3" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsOther_c24f6801-4f15-4656-acb9-9b332bee774d" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsOther"/>
    <link:calculationArc order="7" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAssets_7caed6c9-fb79-42fb-8bb2-9b2e6f836996" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsOther_c24f6801-4f15-4656-acb9-9b332bee774d" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLiabilities_67186108-4e1d-4fc0-8001-17df78cd29ee" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLiabilities"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNoncurrentLiabilitiesOther_04b45f6b-3e2b-4956-8307-f618d4dfa3ba" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNoncurrentLiabilitiesOther"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLiabilities_67186108-4e1d-4fc0-8001-17df78cd29ee" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNoncurrentLiabilitiesOther_04b45f6b-3e2b-4956-8307-f618d4dfa3ba" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCapitalLeaseObligation_2426e2a4-525c-45c3-9b0a-4f5972a986ce" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCapitalLeaseObligation"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLiabilities_67186108-4e1d-4fc0-8001-17df78cd29ee" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCapitalLeaseObligation_2426e2a4-525c-45c3-9b0a-4f5972a986ce" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_cbz_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilitiesAccruedPersonnelCosts_90ba9ccc-3f41-4126-b05a-303f36aa9a6e" xlink:href="cbz-20250930.xsd#cbz_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilitiesAccruedPersonnelCosts"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLiabilities_67186108-4e1d-4fc0-8001-17df78cd29ee" xlink:to="loc_cbz_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilitiesAccruedPersonnelCosts_90ba9ccc-3f41-4126-b05a-303f36aa9a6e" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationContingentConsiderationLiability_782c7334-cbef-4058-9550-d773bb37a35d" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_BusinessCombinationContingentConsiderationLiability"/>
    <link:calculationArc order="4" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLiabilities_67186108-4e1d-4fc0-8001-17df78cd29ee" xlink:to="loc_us-gaap_BusinessCombinationContingentConsiderationLiability_782c7334-cbef-4058-9550-d773bb37a35d" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilitiesAccountsPayable_e4a218c4-16df-4ddd-9814-722c3192b353" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilitiesAccountsPayable"/>
    <link:calculationArc order="5" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLiabilities_67186108-4e1d-4fc0-8001-17df78cd29ee" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilitiesAccountsPayable_e4a218c4-16df-4ddd-9814-722c3192b353" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilitiesOther_ffbd539b-e870-4861-9653-572d24a08825" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilitiesOther"/>
    <link:calculationArc order="6" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLiabilities_67186108-4e1d-4fc0-8001-17df78cd29ee" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilitiesOther_ffbd539b-e870-4861-9653-572d24a08825" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://www.cbiz.com/role/ACCOUNTSRECEIVABLENETSummaryofAccountsReceivableNetDetails" xlink:type="simple" xlink:href="cbz-20250930.xsd#ACCOUNTSRECEIVABLENETSummaryofAccountsReceivableNetDetails"/>
  <link:calculationLink xlink:role="http://www.cbiz.com/role/ACCOUNTSRECEIVABLENETSummaryofAccountsReceivableNetDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccountsReceivableNetCurrent_8cf4f65d-8b05-42cb-957a-1d4742f42c01" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AccountsReceivableNetCurrent"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccountsReceivableGrossCurrent_2a231496-0535-4fcd-ac58-ce66110a28d7" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AccountsReceivableGrossCurrent"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_AccountsReceivableNetCurrent_8cf4f65d-8b05-42cb-957a-1d4742f42c01" xlink:to="loc_us-gaap_AccountsReceivableGrossCurrent_2a231496-0535-4fcd-ac58-ce66110a28d7" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AllowanceForDoubtfulAccountsReceivableCurrent_0c23eb96-50e0-4238-a83a-950adacdd81c" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AllowanceForDoubtfulAccountsReceivableCurrent"/>
    <link:calculationArc order="2" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_AccountsReceivableNetCurrent_8cf4f65d-8b05-42cb-957a-1d4742f42c01" xlink:to="loc_us-gaap_AllowanceForDoubtfulAccountsReceivableCurrent_0c23eb96-50e0-4238-a83a-950adacdd81c" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccountsReceivableGrossCurrent_2f1e75ae-6792-4888-b3d1-65a16cdfa578" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AccountsReceivableGrossCurrent"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BilledContractReceivables_14d9b5e0-76bc-4e3f-8c78-db6eea9e027b" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_BilledContractReceivables"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_AccountsReceivableGrossCurrent_2f1e75ae-6792-4888-b3d1-65a16cdfa578" xlink:to="loc_us-gaap_BilledContractReceivables_14d9b5e0-76bc-4e3f-8c78-db6eea9e027b" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_UnbilledReceivablesCurrent_e8403290-9492-4cfc-8297-34e7af62ce86" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_UnbilledReceivablesCurrent"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_AccountsReceivableGrossCurrent_2f1e75ae-6792-4888-b3d1-65a16cdfa578" xlink:to="loc_us-gaap_UnbilledReceivablesCurrent_e8403290-9492-4cfc-8297-34e7af62ce86" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://www.cbiz.com/role/DEBTANDFINANCINGARRANGEMENTSSummaryofClassificationBetweenShortTermandLongTermDebtDetails" xlink:type="simple" xlink:href="cbz-20250930.xsd#DEBTANDFINANCINGARRANGEMENTSSummaryofClassificationBetweenShortTermandLongTermDebtDetails"/>
  <link:calculationLink xlink:role="http://www.cbiz.com/role/DEBTANDFINANCINGARRANGEMENTSSummaryofClassificationBetweenShortTermandLongTermDebtDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermDebtCurrent_6c6355b7-4bbf-467d-b09d-d767692fa420" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LongTermDebtCurrent"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredFinanceCostsCurrentNet_84bd7569-70a2-4f93-a0bf-98166ce0925a" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DeferredFinanceCostsCurrentNet"/>
    <link:calculationArc order="1" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LongTermDebtCurrent_6c6355b7-4bbf-467d-b09d-d767692fa420" xlink:to="loc_us-gaap_DeferredFinanceCostsCurrentNet_84bd7569-70a2-4f93-a0bf-98166ce0925a" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LinesOfCreditCurrent_6b253364-4c9b-48c2-8c36-e6d883a9ac0d" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LinesOfCreditCurrent"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LongTermDebtCurrent_6c6355b7-4bbf-467d-b09d-d767692fa420" xlink:to="loc_us-gaap_LinesOfCreditCurrent_6b253364-4c9b-48c2-8c36-e6d883a9ac0d" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermDebtNoncurrent_777efb69-104b-410e-b115-a3096d9553c6" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LongTermDebtNoncurrent"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermLineOfCredit_16bae41e-1314-401c-b68b-ce1fc6c9c5fd" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LongTermLineOfCredit"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LongTermDebtNoncurrent_777efb69-104b-410e-b115-a3096d9553c6" xlink:to="loc_us-gaap_LongTermLineOfCredit_16bae41e-1314-401c-b68b-ce1fc6c9c5fd" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredFinanceCostsNoncurrentNet_b992cf66-42c2-4488-8d98-e87eb075038a" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DeferredFinanceCostsNoncurrentNet"/>
    <link:calculationArc order="2" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LongTermDebtNoncurrent_777efb69-104b-410e-b115-a3096d9553c6" xlink:to="loc_us-gaap_DeferredFinanceCostsNoncurrentNet_b992cf66-42c2-4488-8d98-e87eb075038a" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://www.cbiz.com/role/OTHERCOMPREHENSIVEINCOMEDetails" xlink:type="simple" xlink:href="cbz-20250930.xsd#OTHERCOMPREHENSIVEINCOMEDetails"/>
  <link:calculationLink xlink:role="http://www.cbiz.com/role/OTHERCOMPREHENSIVEINCOMEDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent_1b8801d2-d739-4697-a061-19b868121753" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeAvailableforsaleSecuritiesAdjustmentNetOfTaxPortionAttributableToParent_3761a155-a488-4fb0-b334-938e60aafc5d" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OtherComprehensiveIncomeAvailableforsaleSecuritiesAdjustmentNetOfTaxPortionAttributableToParent"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent_1b8801d2-d739-4697-a061-19b868121753" xlink:to="loc_us-gaap_OtherComprehensiveIncomeAvailableforsaleSecuritiesAdjustmentNetOfTaxPortionAttributableToParent_3761a155-a488-4fb0-b334-938e60aafc5d" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTaxParent_d4f610b5-9927-45ff-805b-edd13ea816f8" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTaxParent"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent_1b8801d2-d739-4697-a061-19b868121753" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTaxParent_d4f610b5-9927-45ff-805b-edd13ea816f8" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToParent_2489210d-ee55-4975-9add-8be57fdb5453" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToParent"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent_1b8801d2-d739-4697-a061-19b868121753" xlink:to="loc_us-gaap_OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToParent_2489210d-ee55-4975-9add-8be57fdb5453" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://www.cbiz.com/role/EMPLOYEESTOCKPLANSSummaryofCompensationExpenseforStockBasedAwardsDetails" xlink:type="simple" xlink:href="cbz-20250930.xsd#EMPLOYEESTOCKPLANSSummaryofCompensationExpenseforStockBasedAwardsDetails"/>
  <link:calculationLink xlink:role="http://www.cbiz.com/role/EMPLOYEESTOCKPLANSSummaryofCompensationExpenseforStockBasedAwardsDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AllocatedShareBasedCompensationExpense_fbe39242-3e4f-46e9-bea4-1b67ce5e9b14" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AllocatedShareBasedCompensationExpense"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestrictedStockExpense_ad42584a-96ed-417b-8d8d-565b4a6a4ee6" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RestrictedStockExpense"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_AllocatedShareBasedCompensationExpense_fbe39242-3e4f-46e9-bea4-1b67ce5e9b14" xlink:to="loc_us-gaap_RestrictedStockExpense_ad42584a-96ed-417b-8d8d-565b4a6a4ee6" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_cbz_PerformanceShareUnits_d1775d7f-0e63-4332-b4d2-4053087e9c8f" xlink:href="cbz-20250930.xsd#cbz_PerformanceShareUnits"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_AllocatedShareBasedCompensationExpense_fbe39242-3e4f-46e9-bea4-1b67ce5e9b14" xlink:to="loc_cbz_PerformanceShareUnits_d1775d7f-0e63-4332-b4d2-4053087e9c8f" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://www.cbiz.com/role/EARNINGSPERSHAREDetails" xlink:type="simple" xlink:href="cbz-20250930.xsd#EARNINGSPERSHAREDetails"/>
  <link:calculationLink xlink:role="http://www.cbiz.com/role/EARNINGSPERSHAREDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding_358a5a33-2fe8-4024-8961-da37d3f8ebba" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding"/>
    <link:loc xlink:type="locator" xlink:label="loc_cbz_IncrementalCommonSharesAttributableToStockOptions_a8cca8ab-02a9-425a-a483-171d7dad6cd8" xlink:href="cbz-20250930.xsd#cbz_IncrementalCommonSharesAttributableToStockOptions"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding_358a5a33-2fe8-4024-8961-da37d3f8ebba" xlink:to="loc_cbz_IncrementalCommonSharesAttributableToStockOptions_a8cca8ab-02a9-425a-a483-171d7dad6cd8" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_WeightedAverageNumberOfSharesOutstandingBasic_40f736ba-d0a2-45d9-9033-fa6590e407a0" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_WeightedAverageNumberOfSharesOutstandingBasic"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding_358a5a33-2fe8-4024-8961-da37d3f8ebba" xlink:to="loc_us-gaap_WeightedAverageNumberOfSharesOutstandingBasic_40f736ba-d0a2-45d9-9033-fa6590e407a0" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncrementalCommonSharesAttributableToContingentlyIssuableShares_95db1753-225a-4cd5-b354-352be8df42ff" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncrementalCommonSharesAttributableToContingentlyIssuableShares"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding_358a5a33-2fe8-4024-8961-da37d3f8ebba" xlink:to="loc_us-gaap_IncrementalCommonSharesAttributableToContingentlyIssuableShares_95db1753-225a-4cd5-b354-352be8df42ff" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_cbz_IncrementalCommonSharesAttributableToRestrictedStockUnitsAndAwards_8b24a888-375f-4258-9625-d01f791d94e5" xlink:href="cbz-20250930.xsd#cbz_IncrementalCommonSharesAttributableToRestrictedStockUnitsAndAwards"/>
    <link:calculationArc order="4" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding_358a5a33-2fe8-4024-8961-da37d3f8ebba" xlink:to="loc_cbz_IncrementalCommonSharesAttributableToRestrictedStockUnitsAndAwards_8b24a888-375f-4258-9625-d01f791d94e5" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_cbz_IncrementalCommonSharesAttributableToPerformanceShare_701b4cee-5bc9-429f-bd9a-7fce733f9277" xlink:href="cbz-20250930.xsd#cbz_IncrementalCommonSharesAttributableToPerformanceShare"/>
    <link:calculationArc order="5" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding_358a5a33-2fe8-4024-8961-da37d3f8ebba" xlink:to="loc_cbz_IncrementalCommonSharesAttributableToPerformanceShare_701b4cee-5bc9-429f-bd9a-7fce733f9277" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://www.cbiz.com/role/SEGMENTDISCLOSURESSummaryofSegmentInformationDetails" xlink:type="simple" xlink:href="cbz-20250930.xsd#SEGMENTDISCLOSURESSummaryofSegmentInformationDetails"/>
  <link:calculationLink xlink:role="http://www.cbiz.com/role/SEGMENTDISCLOSURESSummaryofSegmentInformationDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_a7297e06-a0f2-41d0-b72f-cfa9c8e80a63" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherNonoperatingIncomeExpense_edd24956-f261-403c-96de-e132efdc0e99" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OtherNonoperatingIncomeExpense"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_a7297e06-a0f2-41d0-b72f-cfa9c8e80a63" xlink:to="loc_us-gaap_OtherNonoperatingIncomeExpense_edd24956-f261-403c-96de-e132efdc0e99" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GeneralAndAdministrativeExpense_931db678-ff35-4c37-95fb-86fce0a92850" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_GeneralAndAdministrativeExpense"/>
    <link:calculationArc order="2" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_a7297e06-a0f2-41d0-b72f-cfa9c8e80a63" xlink:to="loc_us-gaap_GeneralAndAdministrativeExpense_931db678-ff35-4c37-95fb-86fce0a92850" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingExpenses_5ac9d692-858b-44b5-9703-51fd1e096712" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OperatingExpenses"/>
    <link:calculationArc order="3" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_a7297e06-a0f2-41d0-b72f-cfa9c8e80a63" xlink:to="loc_us-gaap_OperatingExpenses_5ac9d692-858b-44b5-9703-51fd1e096712" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InterestExpenseNonoperating_73f7b27c-7a60-4ec9-ada5-fab9a7bf053a" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InterestExpenseNonoperating"/>
    <link:calculationArc order="4" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_a7297e06-a0f2-41d0-b72f-cfa9c8e80a63" xlink:to="loc_us-gaap_InterestExpenseNonoperating_73f7b27c-7a60-4ec9-ada5-fab9a7bf053a" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_edd3e47c-e31e-49c9-9f70-7ff2f939b96d" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax"/>
    <link:calculationArc order="5" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_a7297e06-a0f2-41d0-b72f-cfa9c8e80a63" xlink:to="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_edd3e47c-e31e-49c9-9f70-7ff2f939b96d" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CostsAndExpenses_a78e137b-63dd-4aaf-b8d7-22a39e7ca19f" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CostsAndExpenses"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LaborAndRelatedExpense_4d68e7e6-8139-4e6c-abbb-7d19b46ddacc" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LaborAndRelatedExpense"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_CostsAndExpenses_a78e137b-63dd-4aaf-b8d7-22a39e7ca19f" xlink:to="loc_us-gaap_LaborAndRelatedExpense_4d68e7e6-8139-4e6c-abbb-7d19b46ddacc" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_cbz_FacilityExpense_6d081ada-2b89-4b42-bce6-da7618046439" xlink:href="cbz-20250930.xsd#cbz_FacilityExpense"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_CostsAndExpenses_a78e137b-63dd-4aaf-b8d7-22a39e7ca19f" xlink:to="loc_cbz_FacilityExpense_6d081ada-2b89-4b42-bce6-da7618046439" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentReportingOtherItemAmount_ab38d878-535f-46e9-94ef-2de1bf280639" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SegmentReportingOtherItemAmount"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_CostsAndExpenses_a78e137b-63dd-4aaf-b8d7-22a39e7ca19f" xlink:to="loc_us-gaap_SegmentReportingOtherItemAmount_ab38d878-535f-46e9-94ef-2de1bf280639" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://www.cbiz.com/role/SEGMENTDISCLOSURESSummaryofSegmentInformationDetails_1" xlink:type="simple" xlink:href="cbz-20250930.xsd#SEGMENTDISCLOSURESSummaryofSegmentInformationDetails_1"/>
  <link:calculationLink xlink:role="http://www.cbiz.com/role/SEGMENTDISCLOSURESSummaryofSegmentInformationDetails_1" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_b8408ad8-70e4-4c5e-a916-c8b47dd10fc2" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_f7e109b5-0467-4977-9eab-f0d3c79318be" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_b8408ad8-70e4-4c5e-a916-c8b47dd10fc2" xlink:to="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_f7e109b5-0467-4977-9eab-f0d3c79318be" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CostsAndExpenses_9ef810e7-1d8f-4ca2-be2a-71e749d4c1e1" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CostsAndExpenses"/>
    <link:calculationArc order="2" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_b8408ad8-70e4-4c5e-a916-c8b47dd10fc2" xlink:to="loc_us-gaap_CostsAndExpenses_9ef810e7-1d8f-4ca2-be2a-71e749d4c1e1" xlink:type="arc"/>
  </link:calculationLink>
</link:linkbase>
