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

<!--XBRL Document Created with Wdesk from Workiva-->
<!--Copyright 2021 Workiva-->
<!--r:79cbf79f-6a87-40be-9f5a-931d03b1bfce,g:bcb037df-8f35-4b8d-927d-df037892d6d3-->
<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.ies-co.com/role/ConsolidatedBalanceSheets" xlink:type="simple" xlink:href="iesc-20210930.xsd#ConsolidatedBalanceSheets"/>
  <link:calculationLink xlink:role="http://www.ies-co.com/role/ConsolidatedBalanceSheets" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LiabilitiesAndStockholdersEquity_3b85502d-4666-4d37-af91-456157bb1ca8" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_LiabilitiesAndStockholdersEquity"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Liabilities_4ae617de-dbb8-462c-ba8b-8d9f08ff0ec7" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.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_3b85502d-4666-4d37-af91-456157bb1ca8" xlink:to="loc_us-gaap_Liabilities_4ae617de-dbb8-462c-ba8b-8d9f08ff0ec7" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MinorityInterest_90ae625f-6d7e-4461-a515-de8f83e66f36" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_MinorityInterest"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquity_3b85502d-4666-4d37-af91-456157bb1ca8" xlink:to="loc_us-gaap_MinorityInterest_90ae625f-6d7e-4461-a515-de8f83e66f36" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockholdersEquity_1d41b6cb-7a41-422a-b954-fc8b4074eb5d" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_StockholdersEquity"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquity_3b85502d-4666-4d37-af91-456157bb1ca8" xlink:to="loc_us-gaap_StockholdersEquity_1d41b6cb-7a41-422a-b954-fc8b4074eb5d" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LiabilitiesCurrent_5fa457ee-54ae-4ce6-8b2b-99017c5931d6" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_LiabilitiesCurrent"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccountsPayableAndAccruedLiabilitiesCurrent_3b90d0e4-ddb3-43d0-930e-910032748e0f" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_AccountsPayableAndAccruedLiabilitiesCurrent"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LiabilitiesCurrent_5fa457ee-54ae-4ce6-8b2b-99017c5931d6" xlink:to="loc_us-gaap_AccountsPayableAndAccruedLiabilitiesCurrent_3b90d0e4-ddb3-43d0-930e-910032748e0f" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ContractWithCustomerLiabilityCurrent_c17f4599-85db-4fd0-b8d1-c98be80a09cc" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ContractWithCustomerLiabilityCurrent"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LiabilitiesCurrent_5fa457ee-54ae-4ce6-8b2b-99017c5931d6" xlink:to="loc_us-gaap_ContractWithCustomerLiabilityCurrent_c17f4599-85db-4fd0-b8d1-c98be80a09cc" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Liabilities_1aa289ef-68e7-4768-a269-654f08f8cf92" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_Liabilities"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LiabilitiesCurrent_3eb4fe11-9499-4c98-856b-9ea5d0d6ba2a" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.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_1aa289ef-68e7-4768-a269-654f08f8cf92" xlink:to="loc_us-gaap_LiabilitiesCurrent_3eb4fe11-9499-4c98-856b-9ea5d0d6ba2a" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermDebtNoncurrent_08c50f44-394d-4ef4-aa58-e788cedd89aa" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_LongTermDebtNoncurrent"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Liabilities_1aa289ef-68e7-4768-a269-654f08f8cf92" xlink:to="loc_us-gaap_LongTermDebtNoncurrent_08c50f44-394d-4ef4-aa58-e788cedd89aa" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherLiabilitiesNoncurrent_8724b8b9-d9eb-4cef-978d-264b5868e268" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_OtherLiabilitiesNoncurrent"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Liabilities_1aa289ef-68e7-4768-a269-654f08f8cf92" xlink:to="loc_us-gaap_OtherLiabilitiesNoncurrent_8724b8b9-d9eb-4cef-978d-264b5868e268" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingLeaseLiabilityNoncurrent_d5a2f2d4-d1cf-4ff6-a4d3-de45a993ae24" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_OperatingLeaseLiabilityNoncurrent"/>
    <link:calculationArc order="4" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Liabilities_1aa289ef-68e7-4768-a269-654f08f8cf92" xlink:to="loc_us-gaap_OperatingLeaseLiabilityNoncurrent_d5a2f2d4-d1cf-4ff6-a4d3-de45a993ae24" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Assets_6c5d9d82-ed5c-4194-8271-0fedd9804307" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_Assets"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AssetsCurrent_d3890f0d-44f5-4db3-b3c2-eea0d0d320da" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.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_6c5d9d82-ed5c-4194-8271-0fedd9804307" xlink:to="loc_us-gaap_AssetsCurrent_d3890f0d-44f5-4db3-b3c2-eea0d0d320da" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentNet_7a0564c0-de44-46e9-b1d4-40e46e0b33c0" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_PropertyPlantAndEquipmentNet"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Assets_6c5d9d82-ed5c-4194-8271-0fedd9804307" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentNet_7a0564c0-de44-46e9-b1d4-40e46e0b33c0" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Goodwill_8c002eb5-2167-4eac-a59c-0cac032064a1" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_Goodwill"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Assets_6c5d9d82-ed5c-4194-8271-0fedd9804307" xlink:to="loc_us-gaap_Goodwill_8c002eb5-2167-4eac-a59c-0cac032064a1" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IntangibleAssetsNetExcludingGoodwill_6d840084-6eb6-448e-981e-6812308ad0e3" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_IntangibleAssetsNetExcludingGoodwill"/>
    <link:calculationArc order="4" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Assets_6c5d9d82-ed5c-4194-8271-0fedd9804307" xlink:to="loc_us-gaap_IntangibleAssetsNetExcludingGoodwill_6d840084-6eb6-448e-981e-6812308ad0e3" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredIncomeTaxAssetsNet_474bf350-f71e-428e-a2a7-892dfc25db31" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DeferredIncomeTaxAssetsNet"/>
    <link:calculationArc order="5" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Assets_6c5d9d82-ed5c-4194-8271-0fedd9804307" xlink:to="loc_us-gaap_DeferredIncomeTaxAssetsNet_474bf350-f71e-428e-a2a7-892dfc25db31" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherAssetsNoncurrent_ecee8fac-4211-4e02-9c5e-fbbc4a4013e1" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_OtherAssetsNoncurrent"/>
    <link:calculationArc order="6" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Assets_6c5d9d82-ed5c-4194-8271-0fedd9804307" xlink:to="loc_us-gaap_OtherAssetsNoncurrent_ecee8fac-4211-4e02-9c5e-fbbc4a4013e1" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingLeaseRightOfUseAsset_b2e7a644-b931-4d19-b9a3-fe973ef223eb" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_OperatingLeaseRightOfUseAsset"/>
    <link:calculationArc order="7" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Assets_6c5d9d82-ed5c-4194-8271-0fedd9804307" xlink:to="loc_us-gaap_OperatingLeaseRightOfUseAsset_b2e7a644-b931-4d19-b9a3-fe973ef223eb" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AssetsCurrent_bddf0724-a2c6-43ef-8f8f-b1104b16f30a" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_AssetsCurrent"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents_1c90b9fb-861e-4a18-a45f-868eb69efbe5" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_AssetsCurrent_bddf0724-a2c6-43ef-8f8f-b1104b16f30a" xlink:to="loc_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents_1c90b9fb-861e-4a18-a45f-868eb69efbe5" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccountsReceivableNetCurrent_4eb75ea5-0f9c-4c2b-b548-6ec49cb1b0b9" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_AccountsReceivableNetCurrent"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_AssetsCurrent_bddf0724-a2c6-43ef-8f8f-b1104b16f30a" xlink:to="loc_us-gaap_AccountsReceivableNetCurrent_4eb75ea5-0f9c-4c2b-b548-6ec49cb1b0b9" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccountsAndOtherReceivablesNetCurrent_19f33657-98bd-4700-8fb6-6a3ba37d4be7" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_AccountsAndOtherReceivablesNetCurrent"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_AssetsCurrent_bddf0724-a2c6-43ef-8f8f-b1104b16f30a" xlink:to="loc_us-gaap_AccountsAndOtherReceivablesNetCurrent_19f33657-98bd-4700-8fb6-6a3ba37d4be7" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InventoryNet_d302fb7f-33bb-485d-80d3-c4bb7e2e207c" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_InventoryNet"/>
    <link:calculationArc order="4" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_AssetsCurrent_bddf0724-a2c6-43ef-8f8f-b1104b16f30a" xlink:to="loc_us-gaap_InventoryNet_d302fb7f-33bb-485d-80d3-c4bb7e2e207c" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ContractWithCustomerAssetGrossCurrent_011bd881-0c5d-4c39-ae19-345c4ebbb438" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ContractWithCustomerAssetGrossCurrent"/>
    <link:calculationArc order="5" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_AssetsCurrent_bddf0724-a2c6-43ef-8f8f-b1104b16f30a" xlink:to="loc_us-gaap_ContractWithCustomerAssetGrossCurrent_011bd881-0c5d-4c39-ae19-345c4ebbb438" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PrepaidExpenseAndOtherAssetsCurrent_62943fca-1092-44b6-a9b0-7e827d1bede5" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_PrepaidExpenseAndOtherAssetsCurrent"/>
    <link:calculationArc order="6" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_AssetsCurrent_bddf0724-a2c6-43ef-8f8f-b1104b16f30a" xlink:to="loc_us-gaap_PrepaidExpenseAndOtherAssetsCurrent_62943fca-1092-44b6-a9b0-7e827d1bede5" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockholdersEquity_1aebf1ae-156d-4870-8765-4c4ab6297f59" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_StockholdersEquity"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PreferredStockValue_75a3d3e7-5e35-4bd6-9601-658af5bc858f" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_PreferredStockValue"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_StockholdersEquity_1aebf1ae-156d-4870-8765-4c4ab6297f59" xlink:to="loc_us-gaap_PreferredStockValue_75a3d3e7-5e35-4bd6-9601-658af5bc858f" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockValue_171f191f-7ab8-484a-b71c-c3dc49e634ed" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_CommonStockValue"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_StockholdersEquity_1aebf1ae-156d-4870-8765-4c4ab6297f59" xlink:to="loc_us-gaap_CommonStockValue_171f191f-7ab8-484a-b71c-c3dc49e634ed" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TreasuryStockValue_9d414661-4ff2-4944-b41f-64cf1d6265c1" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_TreasuryStockValue"/>
    <link:calculationArc order="3" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_StockholdersEquity_1aebf1ae-156d-4870-8765-4c4ab6297f59" xlink:to="loc_us-gaap_TreasuryStockValue_9d414661-4ff2-4944-b41f-64cf1d6265c1" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AdditionalPaidInCapital_208a6a5c-ed0b-46f9-b525-54e5e391d04b" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_AdditionalPaidInCapital"/>
    <link:calculationArc order="4" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_StockholdersEquity_1aebf1ae-156d-4870-8765-4c4ab6297f59" xlink:to="loc_us-gaap_AdditionalPaidInCapital_208a6a5c-ed0b-46f9-b525-54e5e391d04b" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RetainedEarningsAccumulatedDeficit_27ba7adb-9877-4893-9fde-b4fdb3bf465b" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_RetainedEarningsAccumulatedDeficit"/>
    <link:calculationArc order="5" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_StockholdersEquity_1aebf1ae-156d-4870-8765-4c4ab6297f59" xlink:to="loc_us-gaap_RetainedEarningsAccumulatedDeficit_27ba7adb-9877-4893-9fde-b4fdb3bf465b" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://www.ies-co.com/role/ConsolidatedStatementsofComprehensiveIncome" xlink:type="simple" xlink:href="iesc-20210930.xsd#ConsolidatedStatementsofComprehensiveIncome"/>
  <link:calculationLink xlink:role="http://www.ies-co.com/role/ConsolidatedStatementsofComprehensiveIncome" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GrossProfit_4c44b017-a6f5-4338-b512-a5b8fcdc1fdf" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_GrossProfit"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Revenues_7677d5b0-c68b-4dd7-ae67-8f93e279fdf3" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_Revenues"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_GrossProfit_4c44b017-a6f5-4338-b512-a5b8fcdc1fdf" xlink:to="loc_us-gaap_Revenues_7677d5b0-c68b-4dd7-ae67-8f93e279fdf3" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CostOfGoodsAndServicesSold_1a9201c2-123c-4886-a548-ab24393c8a3f" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_CostOfGoodsAndServicesSold"/>
    <link:calculationArc order="2" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_GrossProfit_4c44b017-a6f5-4338-b512-a5b8fcdc1fdf" xlink:to="loc_us-gaap_CostOfGoodsAndServicesSold_1a9201c2-123c-4886-a548-ab24393c8a3f" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingIncomeLoss_f427e464-b553-4e98-93dc-426cfc9b4711" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_OperatingIncomeLoss"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GrossProfit_5586aa96-b034-46d0-858e-b207768865f6" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_GrossProfit"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_OperatingIncomeLoss_f427e464-b553-4e98-93dc-426cfc9b4711" xlink:to="loc_us-gaap_GrossProfit_5586aa96-b034-46d0-858e-b207768865f6" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SellingGeneralAndAdministrativeExpense_63af2717-7a53-4968-84a2-0fcb61f41fdb" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_SellingGeneralAndAdministrativeExpense"/>
    <link:calculationArc order="2" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_OperatingIncomeLoss_f427e464-b553-4e98-93dc-426cfc9b4711" xlink:to="loc_us-gaap_SellingGeneralAndAdministrativeExpense_63af2717-7a53-4968-84a2-0fcb61f41fdb" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GoodwillImpairmentLoss_4491439a-4c9b-43b1-af5a-331136ad8b86" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_GoodwillImpairmentLoss"/>
    <link:calculationArc order="3" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_OperatingIncomeLoss_f427e464-b553-4e98-93dc-426cfc9b4711" xlink:to="loc_us-gaap_GoodwillImpairmentLoss_4491439a-4c9b-43b1-af5a-331136ad8b86" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationIntegrationRelatedCosts_84e20088-50eb-442a-8a52-c9bf99926fe4" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_BusinessCombinationIntegrationRelatedCosts"/>
    <link:calculationArc order="4" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_OperatingIncomeLoss_f427e464-b553-4e98-93dc-426cfc9b4711" xlink:to="loc_us-gaap_BusinessCombinationIntegrationRelatedCosts_84e20088-50eb-442a-8a52-c9bf99926fe4" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GainLossOnDispositionOfAssets1_9178f0b8-adbe-4637-a78c-34b3a1179285" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_GainLossOnDispositionOfAssets1"/>
    <link:calculationArc order="5" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_OperatingIncomeLoss_f427e464-b553-4e98-93dc-426cfc9b4711" xlink:to="loc_us-gaap_GainLossOnDispositionOfAssets1_9178f0b8-adbe-4637-a78c-34b3a1179285" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetIncomeLoss_a3cf26c7-90be-4b0a-9edd-e76c0d5b85c7" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_NetIncomeLoss"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProfitLoss_298ba7fe-d5df-4d43-986d-0e9dd9e72fb8" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ProfitLoss"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetIncomeLoss_a3cf26c7-90be-4b0a-9edd-e76c0d5b85c7" xlink:to="loc_us-gaap_ProfitLoss_298ba7fe-d5df-4d43-986d-0e9dd9e72fb8" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetIncomeLossAttributableToNoncontrollingInterest_e3f6b9a7-d4f7-44be-8246-7cf6f5931463" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_NetIncomeLossAttributableToNoncontrollingInterest"/>
    <link:calculationArc order="2" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetIncomeLoss_a3cf26c7-90be-4b0a-9edd-e76c0d5b85c7" xlink:to="loc_us-gaap_NetIncomeLossAttributableToNoncontrollingInterest_e3f6b9a7-d4f7-44be-8246-7cf6f5931463" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProfitLoss_21eb1abc-bce6-4bd2-a6ab-9e05b41ff237" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ProfitLoss"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_e5d89681-0e5e-4715-bcf8-aa22416f0b58" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_ProfitLoss_21eb1abc-bce6-4bd2-a6ab-9e05b41ff237" xlink:to="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_e5d89681-0e5e-4715-bcf8-aa22416f0b58" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxExpenseBenefit_5cab5dcf-70e5-4a15-a691-3cb8ca2dfce5" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_IncomeTaxExpenseBenefit"/>
    <link:calculationArc order="2" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_ProfitLoss_21eb1abc-bce6-4bd2-a6ab-9e05b41ff237" xlink:to="loc_us-gaap_IncomeTaxExpenseBenefit_5cab5dcf-70e5-4a15-a691-3cb8ca2dfce5" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_d6128a7b-65ce-41cd-9544-ee65ce63ec81" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingIncomeLoss_4c1c5e5e-2d5f-4187-a1aa-5282a846be6a" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.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_d6128a7b-65ce-41cd-9544-ee65ce63ec81" xlink:to="loc_us-gaap_OperatingIncomeLoss_4c1c5e5e-2d5f-4187-a1aa-5282a846be6a" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InterestExpenseDebt_8925fc6d-cb55-4fcc-abce-24865027565d" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_InterestExpenseDebt"/>
    <link:calculationArc order="2" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_d6128a7b-65ce-41cd-9544-ee65ce63ec81" xlink:to="loc_us-gaap_InterestExpenseDebt_8925fc6d-cb55-4fcc-abce-24865027565d" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherNonoperatingIncomeExpense_17a3e09b-b8c6-4afa-9cdc-09dce2aba1be" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_OtherNonoperatingIncomeExpense"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_d6128a7b-65ce-41cd-9544-ee65ce63ec81" xlink:to="loc_us-gaap_OtherNonoperatingIncomeExpense_17a3e09b-b8c6-4afa-9cdc-09dce2aba1be" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://www.ies-co.com/role/ConsolidatedStatementsofCashFlows" xlink:type="simple" xlink:href="iesc-20210930.xsd#ConsolidatedStatementsofCashFlows"/>
  <link:calculationLink xlink:role="http://www.ies-co.com/role/ConsolidatedStatementsofCashFlows" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect_34c41090-dd8f-4ace-9f8a-425a252c435a" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_338eb394-3247-4108-b486-9ca40a78c648" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_NetCashProvidedByUsedInFinancingActivities"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect_34c41090-dd8f-4ace-9f8a-425a252c435a" xlink:to="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_338eb394-3247-4108-b486-9ca40a78c648" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_64f191f6-4adc-41a9-97e1-d5862909c8db" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.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_34c41090-dd8f-4ace-9f8a-425a252c435a" xlink:to="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_64f191f6-4adc-41a9-97e1-d5862909c8db" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_3ac0fdf1-474a-454c-9685-3d351a26ed36" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_NetCashProvidedByUsedInOperatingActivities"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect_34c41090-dd8f-4ace-9f8a-425a252c435a" xlink:to="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_3ac0fdf1-474a-454c-9685-3d351a26ed36" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_2974a6be-3410-4e06-803d-c1d03fb6c979" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_NetCashProvidedByUsedInFinancingActivities"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProceedsFromStockOptionsExercised_4a1962aa-038f-4f77-839b-fa210eec59bd" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ProceedsFromStockOptionsExercised"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_2974a6be-3410-4e06-803d-c1d03fb6c979" xlink:to="loc_us-gaap_ProceedsFromStockOptionsExercised_4a1962aa-038f-4f77-839b-fa210eec59bd" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentsForRepurchaseOfCommonStock_8b4ee252-2e0e-48b6-bf27-a3debc638af9" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_PaymentsForRepurchaseOfCommonStock"/>
    <link:calculationArc order="2" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_2974a6be-3410-4e06-803d-c1d03fb6c979" xlink:to="loc_us-gaap_PaymentsForRepurchaseOfCommonStock_8b4ee252-2e0e-48b6-bf27-a3debc638af9" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProceedsFromPaymentsToMinorityShareholders_da21a091-fdd2-4f57-8a02-a73983cc76ce" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ProceedsFromPaymentsToMinorityShareholders"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_2974a6be-3410-4e06-803d-c1d03fb6c979" xlink:to="loc_us-gaap_ProceedsFromPaymentsToMinorityShareholders_da21a091-fdd2-4f57-8a02-a73983cc76ce" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProceedsFromIssuanceOfLongTermDebtAndCapitalSecuritiesNet_158448a3-3ba8-48e2-867c-10597d258023" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ProceedsFromIssuanceOfLongTermDebtAndCapitalSecuritiesNet"/>
    <link:calculationArc order="4" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_2974a6be-3410-4e06-803d-c1d03fb6c979" xlink:to="loc_us-gaap_ProceedsFromIssuanceOfLongTermDebtAndCapitalSecuritiesNet_158448a3-3ba8-48e2-867c-10597d258023" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentForContingentConsiderationLiabilityFinancingActivities_5e5a444d-e739-4944-998d-a0156b88f9e9" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_PaymentForContingentConsiderationLiabilityFinancingActivities"/>
    <link:calculationArc order="5" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_2974a6be-3410-4e06-803d-c1d03fb6c979" xlink:to="loc_us-gaap_PaymentForContingentConsiderationLiabilityFinancingActivities_5e5a444d-e739-4944-998d-a0156b88f9e9" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentsForRepurchaseOfRedeemableNoncontrollingInterest_740c8db7-c051-4238-bb6b-ec6a4df57ad9" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_PaymentsForRepurchaseOfRedeemableNoncontrollingInterest"/>
    <link:calculationArc order="6" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_2974a6be-3410-4e06-803d-c1d03fb6c979" xlink:to="loc_us-gaap_PaymentsForRepurchaseOfRedeemableNoncontrollingInterest_740c8db7-c051-4238-bb6b-ec6a4df57ad9" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RepaymentsOfLongTermDebtAndCapitalSecurities_9cc06e9b-a832-4694-97f2-e48d56a1fb12" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_RepaymentsOfLongTermDebtAndCapitalSecurities"/>
    <link:calculationArc order="7" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_2974a6be-3410-4e06-803d-c1d03fb6c979" xlink:to="loc_us-gaap_RepaymentsOfLongTermDebtAndCapitalSecurities_9cc06e9b-a832-4694-97f2-e48d56a1fb12" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProceedsFromRepaymentsOfOtherLongTermDebt_ad0e2949-3a5b-43a7-bdf1-69d23b89dc9b" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ProceedsFromRepaymentsOfOtherLongTermDebt"/>
    <link:calculationArc order="8" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_2974a6be-3410-4e06-803d-c1d03fb6c979" xlink:to="loc_us-gaap_ProceedsFromRepaymentsOfOtherLongTermDebt_ad0e2949-3a5b-43a7-bdf1-69d23b89dc9b" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_3912d9e8-7bba-4e99-b821-7baf022cd8d9" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_NetCashProvidedByUsedInInvestingActivities"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentsToAcquireProductiveAssets_3f67dd10-4112-4a8c-bce2-3549b035cb37" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_PaymentsToAcquireProductiveAssets"/>
    <link:calculationArc order="1" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_3912d9e8-7bba-4e99-b821-7baf022cd8d9" xlink:to="loc_us-gaap_PaymentsToAcquireProductiveAssets_3f67dd10-4112-4a8c-bce2-3549b035cb37" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProceedsFromSaleOfProductiveAssets_e97b2ba8-2f4e-40f2-8b5f-9813eb97bd72" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ProceedsFromSaleOfProductiveAssets"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_3912d9e8-7bba-4e99-b821-7baf022cd8d9" xlink:to="loc_us-gaap_ProceedsFromSaleOfProductiveAssets_e97b2ba8-2f4e-40f2-8b5f-9813eb97bd72" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentsToAcquireBusinessesNetOfCashAcquired_0cf2a80a-1649-46f1-95cb-2ab7d797be7c" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_PaymentsToAcquireBusinessesNetOfCashAcquired"/>
    <link:calculationArc order="3" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_3912d9e8-7bba-4e99-b821-7baf022cd8d9" xlink:to="loc_us-gaap_PaymentsToAcquireBusinessesNetOfCashAcquired_0cf2a80a-1649-46f1-95cb-2ab7d797be7c" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_9d318926-e895-4d2f-a51d-f19ed0d8ad13" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_NetCashProvidedByUsedInOperatingActivities"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProfitLoss_33b5e051-4b21-4bfe-9b9c-8a257f08fa0b" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ProfitLoss"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_9d318926-e895-4d2f-a51d-f19ed0d8ad13" xlink:to="loc_us-gaap_ProfitLoss_33b5e051-4b21-4bfe-9b9c-8a257f08fa0b" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProvisionForDoubtfulAccounts_5c10bead-acd5-4390-af69-b15c49e9482a" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ProvisionForDoubtfulAccounts"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_9d318926-e895-4d2f-a51d-f19ed0d8ad13" xlink:to="loc_us-gaap_ProvisionForDoubtfulAccounts_5c10bead-acd5-4390-af69-b15c49e9482a" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AmortizationOfFinancingCosts_57892ca7-03c8-4d91-bdfb-f350acbfe75a" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_AmortizationOfFinancingCosts"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_9d318926-e895-4d2f-a51d-f19ed0d8ad13" xlink:to="loc_us-gaap_AmortizationOfFinancingCosts_57892ca7-03c8-4d91-bdfb-f350acbfe75a" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DepreciationDepletionAndAmortization_5759df19-c8ba-462b-8fd7-6e2ca31d455a" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.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_9d318926-e895-4d2f-a51d-f19ed0d8ad13" xlink:to="loc_us-gaap_DepreciationDepletionAndAmortization_5759df19-c8ba-462b-8fd7-6e2ca31d455a" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GainLossOnDispositionOfAssets1_c49a7023-8d2c-4c99-a6e3-3e55c90ecef9" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_GainLossOnDispositionOfAssets1"/>
    <link:calculationArc order="5" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_9d318926-e895-4d2f-a51d-f19ed0d8ad13" xlink:to="loc_us-gaap_GainLossOnDispositionOfAssets1_c49a7023-8d2c-4c99-a6e3-3e55c90ecef9" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensation_69a0bbac-a867-4822-95c5-1e4b65e559ca" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.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_9d318926-e895-4d2f-a51d-f19ed0d8ad13" xlink:to="loc_us-gaap_ShareBasedCompensation_69a0bbac-a867-4822-95c5-1e4b65e559ca" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredIncomeTaxExpenseBenefit_fa282bc0-f73b-4d6e-8261-cc40c6f53e7b" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DeferredIncomeTaxExpenseBenefit"/>
    <link:calculationArc order="7" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_9d318926-e895-4d2f-a51d-f19ed0d8ad13" xlink:to="loc_us-gaap_DeferredIncomeTaxExpenseBenefit_fa282bc0-f73b-4d6e-8261-cc40c6f53e7b" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInAccountsReceivable_955d74f9-c354-401a-9001-92b8f0698f7e" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_IncreaseDecreaseInAccountsReceivable"/>
    <link:calculationArc order="8" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_9d318926-e895-4d2f-a51d-f19ed0d8ad13" xlink:to="loc_us-gaap_IncreaseDecreaseInAccountsReceivable_955d74f9-c354-401a-9001-92b8f0698f7e" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInInventories_bbac7926-5fc1-4a5f-989e-3d412d9338da" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_IncreaseDecreaseInInventories"/>
    <link:calculationArc order="9" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_9d318926-e895-4d2f-a51d-f19ed0d8ad13" xlink:to="loc_us-gaap_IncreaseDecreaseInInventories_bbac7926-5fc1-4a5f-989e-3d412d9338da" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInContractWithCustomerAsset_ac5f4f59-0192-472d-937d-ed7a246d5ce9" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_IncreaseDecreaseInContractWithCustomerAsset"/>
    <link:calculationArc order="10" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_9d318926-e895-4d2f-a51d-f19ed0d8ad13" xlink:to="loc_us-gaap_IncreaseDecreaseInContractWithCustomerAsset_ac5f4f59-0192-472d-937d-ed7a246d5ce9" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInOtherCurrentAssets_c26ad37c-209a-4051-b9a6-8b9e62b97924" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_IncreaseDecreaseInOtherCurrentAssets"/>
    <link:calculationArc order="11" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_9d318926-e895-4d2f-a51d-f19ed0d8ad13" xlink:to="loc_us-gaap_IncreaseDecreaseInOtherCurrentAssets_c26ad37c-209a-4051-b9a6-8b9e62b97924" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInOtherNoncurrentAssets_f893a2cc-d771-4176-b43e-303a5d21ffac" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_IncreaseDecreaseInOtherNoncurrentAssets"/>
    <link:calculationArc order="12" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_9d318926-e895-4d2f-a51d-f19ed0d8ad13" xlink:to="loc_us-gaap_IncreaseDecreaseInOtherNoncurrentAssets_f893a2cc-d771-4176-b43e-303a5d21ffac" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInOtherAccountsPayableAndAccruedLiabilities_c3363927-8ea5-4533-b2ec-2fc8d50560b3" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_IncreaseDecreaseInOtherAccountsPayableAndAccruedLiabilities"/>
    <link:calculationArc order="13" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_9d318926-e895-4d2f-a51d-f19ed0d8ad13" xlink:to="loc_us-gaap_IncreaseDecreaseInOtherAccountsPayableAndAccruedLiabilities_c3363927-8ea5-4533-b2ec-2fc8d50560b3" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInContractWithCustomerLiability_bbe1cc50-0004-4b51-9b1b-31357a4e707c" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_IncreaseDecreaseInContractWithCustomerLiability"/>
    <link:calculationArc order="14" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_9d318926-e895-4d2f-a51d-f19ed0d8ad13" xlink:to="loc_us-gaap_IncreaseDecreaseInContractWithCustomerLiability_bbe1cc50-0004-4b51-9b1b-31357a4e707c" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInOtherNoncurrentLiabilities_492c3ddc-faec-49bf-81c1-d26109b35056" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_IncreaseDecreaseInOtherNoncurrentLiabilities"/>
    <link:calculationArc order="15" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_9d318926-e895-4d2f-a51d-f19ed0d8ad13" xlink:to="loc_us-gaap_IncreaseDecreaseInOtherNoncurrentLiabilities_492c3ddc-faec-49bf-81c1-d26109b35056" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GoodwillImpairmentLoss_1171042a-957f-49de-bd5a-e1308a3775b9" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_GoodwillImpairmentLoss"/>
    <link:calculationArc order="16" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_9d318926-e895-4d2f-a51d-f19ed0d8ad13" xlink:to="loc_us-gaap_GoodwillImpairmentLoss_1171042a-957f-49de-bd5a-e1308a3775b9" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://www.ies-co.com/role/PerShareInformationDetails" xlink:type="simple" xlink:href="iesc-20210930.xsd#PerShareInformationDetails"/>
  <link:calculationLink xlink:role="http://www.ies-co.com/role/PerShareInformationDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding_0199cd31-0ed3-4293-9864-70b29c9b3b0a" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_WeightedAverageNumberOfSharesOutstandingBasic_5eeda57e-22bc-42ac-87c6-af4b3e741732" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_WeightedAverageNumberOfSharesOutstandingBasic"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding_0199cd31-0ed3-4293-9864-70b29c9b3b0a" xlink:to="loc_us-gaap_WeightedAverageNumberOfSharesOutstandingBasic_5eeda57e-22bc-42ac-87c6-af4b3e741732" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncrementalCommonSharesAttributableToShareBasedPaymentArrangements_46b2ed86-5f18-41f5-b104-feefcbe819fb" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_IncrementalCommonSharesAttributableToShareBasedPaymentArrangements"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding_0199cd31-0ed3-4293-9864-70b29c9b3b0a" xlink:to="loc_us-gaap_IncrementalCommonSharesAttributableToShareBasedPaymentArrangements_46b2ed86-5f18-41f5-b104-feefcbe819fb" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetIncomeLoss_9dffa5cc-76c1-4cea-a802-34b872ae746f" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_NetIncomeLoss"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_UndistributedEarningsLossAvailableToCommonShareholdersBasic_077c2b50-837c-4ba9-b52b-a4bde83c6d15" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_UndistributedEarningsLossAvailableToCommonShareholdersBasic"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetIncomeLoss_9dffa5cc-76c1-4cea-a802-34b872ae746f" xlink:to="loc_us-gaap_UndistributedEarningsLossAvailableToCommonShareholdersBasic_077c2b50-837c-4ba9-b52b-a4bde83c6d15" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MinorityInterestPeriodIncreaseDecrease_f127d0e3-0e20-41ee-aaa3-0cb29e11a242" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_MinorityInterestPeriodIncreaseDecrease"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetIncomeLoss_9dffa5cc-76c1-4cea-a802-34b872ae746f" xlink:to="loc_us-gaap_MinorityInterestPeriodIncreaseDecrease_f127d0e3-0e20-41ee-aaa3-0cb29e11a242" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_UndistributedEarningsLossAllocatedToParticipatingSecuritiesBasic_94f32d42-11ba-475e-9f8b-f1ed2f434270" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_UndistributedEarningsLossAllocatedToParticipatingSecuritiesBasic"/>
    <link:calculationArc order="3" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetIncomeLoss_9dffa5cc-76c1-4cea-a802-34b872ae746f" xlink:to="loc_us-gaap_UndistributedEarningsLossAllocatedToParticipatingSecuritiesBasic_94f32d42-11ba-475e-9f8b-f1ed2f434270" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://www.ies-co.com/role/DetailofCertainBalanceSheetAccountsDetails" xlink:type="simple" xlink:href="iesc-20210930.xsd#DetailofCertainBalanceSheetAccountsDetails"/>
  <link:calculationLink xlink:role="http://www.ies-co.com/role/DetailofCertainBalanceSheetAccountsDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccountsPayableAndAccruedLiabilitiesCurrent_2c0bb35e-d054-4142-80df-499f1f483994" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_AccountsPayableAndAccruedLiabilitiesCurrent"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccountsPayableTradeCurrent_4b54175d-3b8a-479f-8d7a-cf4ded5085ac" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_AccountsPayableTradeCurrent"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_AccountsPayableAndAccruedLiabilitiesCurrent_2c0bb35e-d054-4142-80df-499f1f483994" xlink:to="loc_us-gaap_AccountsPayableTradeCurrent_4b54175d-3b8a-479f-8d7a-cf4ded5085ac" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccruedSalariesCurrentAndNoncurrent_20cebd25-b796-4bfa-a44c-73e71b2b342d" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_AccruedSalariesCurrentAndNoncurrent"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_AccountsPayableAndAccruedLiabilitiesCurrent_2c0bb35e-d054-4142-80df-499f1f483994" xlink:to="loc_us-gaap_AccruedSalariesCurrentAndNoncurrent_20cebd25-b796-4bfa-a44c-73e71b2b342d" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccruedInsuranceCurrentAndNoncurrent_cee2e178-f8f8-4548-850f-b83aaea6360a" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_AccruedInsuranceCurrentAndNoncurrent"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_AccountsPayableAndAccruedLiabilitiesCurrent_2c0bb35e-d054-4142-80df-499f1f483994" xlink:to="loc_us-gaap_AccruedInsuranceCurrentAndNoncurrent_cee2e178-f8f8-4548-850f-b83aaea6360a" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherAccruedLiabilitiesCurrent_87c5a469-564a-4f7b-8bab-63346b7c557a" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_OtherAccruedLiabilitiesCurrent"/>
    <link:calculationArc order="4" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_AccountsPayableAndAccruedLiabilitiesCurrent_2c0bb35e-d054-4142-80df-499f1f483994" xlink:to="loc_us-gaap_OtherAccruedLiabilitiesCurrent_87c5a469-564a-4f7b-8bab-63346b7c557a" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingLeaseLiabilityCurrent_075fe62f-8fa2-46a4-8fca-d136b4f43a3a" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_OperatingLeaseLiabilityCurrent"/>
    <link:calculationArc order="5" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_AccountsPayableAndAccruedLiabilitiesCurrent_2c0bb35e-d054-4142-80df-499f1f483994" xlink:to="loc_us-gaap_OperatingLeaseLiabilityCurrent_075fe62f-8fa2-46a4-8fca-d136b4f43a3a" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherAssetsNoncurrent_0c49c5ce-da8e-461f-a1e3-111c125f13e5" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_OtherAssetsNoncurrent"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AssetsFairValueDisclosure_172dcbdb-9a2c-4400-8c14-fc2a143640ee" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_AssetsFairValueDisclosure"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_OtherAssetsNoncurrent_0c49c5ce-da8e-461f-a1e3-111c125f13e5" xlink:to="loc_us-gaap_AssetsFairValueDisclosure_172dcbdb-9a2c-4400-8c14-fc2a143640ee" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Investments_5ff50f99-e9a0-4249-9fc9-a64587d703dd" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_Investments"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_OtherAssetsNoncurrent_0c49c5ce-da8e-461f-a1e3-111c125f13e5" xlink:to="loc_us-gaap_Investments_5ff50f99-e9a0-4249-9fc9-a64587d703dd" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherAssetsMiscellaneousNoncurrent_95f79cbf-b969-42b3-9ab6-f826d8778d8c" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_OtherAssetsMiscellaneousNoncurrent"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_OtherAssetsNoncurrent_0c49c5ce-da8e-461f-a1e3-111c125f13e5" xlink:to="loc_us-gaap_OtherAssetsMiscellaneousNoncurrent_95f79cbf-b969-42b3-9ab6-f826d8778d8c" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://www.ies-co.com/role/DebtDetails" xlink:type="simple" xlink:href="iesc-20210930.xsd#DebtDetails"/>
  <link:calculationLink xlink:role="http://www.ies-co.com/role/DebtDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermDebtNoncurrent_f8abde64-7a36-46a3-aeee-da937c55c2c1" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_LongTermDebtNoncurrent"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermLoansFromBank_cbfd8e21-bfda-48bc-838d-d81b5645891f" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_LongTermLoansFromBank"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LongTermDebtNoncurrent_f8abde64-7a36-46a3-aeee-da937c55c2c1" xlink:to="loc_us-gaap_LongTermLoansFromBank_cbfd8e21-bfda-48bc-838d-d81b5645891f" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredFinanceCostsNoncurrentNet_d71cbf45-3c92-4921-a1cb-960f4d0a115d" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.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_f8abde64-7a36-46a3-aeee-da937c55c2c1" xlink:to="loc_us-gaap_DeferredFinanceCostsNoncurrentNet_d71cbf45-3c92-4921-a1cb-960f4d0a115d" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherLongTermDebtNoncurrent_0e3bc403-8062-4419-85ba-e3a1d66e2f2c" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_OtherLongTermDebtNoncurrent"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LongTermDebtNoncurrent_f8abde64-7a36-46a3-aeee-da937c55c2c1" xlink:to="loc_us-gaap_OtherLongTermDebtNoncurrent_0e3bc403-8062-4419-85ba-e3a1d66e2f2c" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://www.ies-co.com/role/FairValueMeasurementsDetails" xlink:type="simple" xlink:href="iesc-20210930.xsd#FairValueMeasurementsDetails"/>
  <link:calculationLink xlink:role="http://www.ies-co.com/role/FairValueMeasurementsDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueNetAssetLiability_f3c26cc1-2fce-4e00-9e0c-67f5fc9cc184" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FairValueNetAssetLiability"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AssetsFairValueDisclosure_fde2d77d-3bf7-4cec-97ac-bcdf749284ca" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_AssetsFairValueDisclosure"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_FairValueNetAssetLiability_f3c26cc1-2fce-4e00-9e0c-67f5fc9cc184" xlink:to="loc_us-gaap_AssetsFairValueDisclosure_fde2d77d-3bf7-4cec-97ac-bcdf749284ca" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LiabilitiesFairValueDisclosure_4dde634a-9af8-4756-b39c-654c4b2aea11" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_LiabilitiesFairValueDisclosure"/>
    <link:calculationArc order="2" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_FairValueNetAssetLiability_f3c26cc1-2fce-4e00-9e0c-67f5fc9cc184" xlink:to="loc_us-gaap_LiabilitiesFairValueDisclosure_4dde634a-9af8-4756-b39c-654c4b2aea11" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationContingentConsiderationLiabilityNoncurrent_b8666e2a-a649-4a22-892e-7ba3d43bf226" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_BusinessCombinationContingentConsiderationLiabilityNoncurrent"/>
    <link:calculationArc order="3" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_FairValueNetAssetLiability_f3c26cc1-2fce-4e00-9e0c-67f5fc9cc184" xlink:to="loc_us-gaap_BusinessCombinationContingentConsiderationLiabilityNoncurrent_b8666e2a-a649-4a22-892e-7ba3d43bf226" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://www.ies-co.com/role/InventoryDetails" xlink:type="simple" xlink:href="iesc-20210930.xsd#InventoryDetails"/>
  <link:calculationLink xlink:role="http://www.ies-co.com/role/InventoryDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InventoryNet_44ae9bb2-f532-480f-a93c-3f5748e0d348" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_InventoryNet"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InventoryRawMaterials_1bdaecf2-f9c0-44c0-a4d4-19306c59d2c6" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_InventoryRawMaterials"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_InventoryNet_44ae9bb2-f532-480f-a93c-3f5748e0d348" xlink:to="loc_us-gaap_InventoryRawMaterials_1bdaecf2-f9c0-44c0-a4d4-19306c59d2c6" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InventoryWorkInProcess_578afa53-c9b2-4bc1-84af-d466f832aae3" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_InventoryWorkInProcess"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_InventoryNet_44ae9bb2-f532-480f-a93c-3f5748e0d348" xlink:to="loc_us-gaap_InventoryWorkInProcess_578afa53-c9b2-4bc1-84af-d466f832aae3" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InventoryFinishedGoods_fe5a980b-0072-44e3-bcca-47e9990fdcfe" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_InventoryFinishedGoods"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_InventoryNet_44ae9bb2-f532-480f-a93c-3f5748e0d348" xlink:to="loc_us-gaap_InventoryFinishedGoods_fe5a980b-0072-44e3-bcca-47e9990fdcfe" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherInventory_3558eeea-8d49-44d6-8177-84d7091049df" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_OtherInventory"/>
    <link:calculationArc order="4" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_InventoryNet_44ae9bb2-f532-480f-a93c-3f5748e0d348" xlink:to="loc_us-gaap_OtherInventory_3558eeea-8d49-44d6-8177-84d7091049df" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://www.ies-co.com/role/GoodwillandIntangibleAssetsIntangiblesDetails" xlink:type="simple" xlink:href="iesc-20210930.xsd#GoodwillandIntangibleAssetsIntangiblesDetails"/>
  <link:calculationLink xlink:role="http://www.ies-co.com/role/GoodwillandIntangibleAssetsIntangiblesDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IntangibleAssetsNetExcludingGoodwill_6f9875ea-1514-412b-ad9f-d0ef6720071d" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_IntangibleAssetsNetExcludingGoodwill"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization_0261a231-59ac-4524-a55d-5c0b498d4282" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization"/>
    <link:calculationArc order="1" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_IntangibleAssetsNetExcludingGoodwill_6f9875ea-1514-412b-ad9f-d0ef6720071d" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization_0261a231-59ac-4524-a55d-5c0b498d4282" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsGross_bfabb3d6-87e4-4a10-a450-9833023fa9da" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsGross"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_IntangibleAssetsNetExcludingGoodwill_6f9875ea-1514-412b-ad9f-d0ef6720071d" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsGross_bfabb3d6-87e4-4a10-a450-9833023fa9da" xlink:type="arc"/>
  </link:calculationLink>
</link:linkbase>
