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Earnings for debt service / debt service</in-capmkt:RemarksForDebtServiceCoverageRatio><in-capmkt:RemarksForInterestServiceCoverageRatio contextRef="OneD">Interest service coverage ratio (times) &lt;BR&gt; 
(not annualised) &lt;BR&gt; 
Operating profit / interest expenses</in-capmkt:RemarksForInterestServiceCoverageRatio><in-capmkt:DescriptionOfOtherExpenses contextRef="OneExpenses1D">Other Expense</in-capmkt:DescriptionOfOtherExpenses><in-capmkt:OtherExpenses contextRef="OneExpenses1D" decimals="-5" unitRef="INR">1144400000</in-capmkt:OtherExpenses><in-capmkt:DescriptionOfReportableSegment contextRef="OneReportable1D">Information technology services</in-capmkt:DescriptionOfReportableSegment><in-capmkt:SegmentRevenue contextRef="OneReportable1D" decimals="-4" unitRef="INR">5208130000</in-capmkt:SegmentRevenue><in-capmkt:DescriptionOfReportableSegment contextRef="OneReportable2D">Knowledge Service</in-capmkt:DescriptionOfReportableSegment><in-capmkt:SegmentRevenue contextRef="OneReportable2D" decimals="-4" unitRef="INR">556180000</in-capmkt:SegmentRevenue><in-capmkt:SegmentRevenue contextRef="OneD" decimals="-4" unitRef="INR">5764310000</in-capmkt:SegmentRevenue><in-capmkt:InterSegmentRevenue contextRef="OneD" decimals="-4" unitRef="INR">16630000</in-capmkt:InterSegmentRevenue><in-capmkt:SegmentRevenueFromOperations contextRef="OneD" decimals="-4" unitRef="INR">5747680000</in-capmkt:SegmentRevenueFromOperations><in-capmkt:DescriptionOfReportableSegment contextRef="OneReportableFinance1D">Information technology services</in-capmkt:DescriptionOfReportableSegment><in-capmkt:SegmentProfitLossBeforeTaxAndFinanceCosts contextRef="OneReportableFinance1D" decimals="-4" unitRef="INR">841720000</in-capmkt:SegmentProfitLossBeforeTaxAndFinanceCosts><in-capmkt:DescriptionOfReportableSegment contextRef="OneReportableFinance2D">Knowledge Service</in-capmkt:DescriptionOfReportableSegment><in-capmkt:SegmentProfitLossBeforeTaxAndFinanceCosts contextRef="OneReportableFinance2D" decimals="-4" unitRef="INR">265560000</in-capmkt:SegmentProfitLossBeforeTaxAndFinanceCosts><in-capmkt:SegmentProfitLossBeforeTaxAndFinanceCosts contextRef="OneD" decimals="-4" unitRef="INR">1107280000</in-capmkt:SegmentProfitLossBeforeTaxAndFinanceCosts><in-capmkt:SegmentFinanceCosts contextRef="OneD" decimals="-4" unitRef="INR">95910000</in-capmkt:SegmentFinanceCosts><in-capmkt:OtherUnallocableExpenditureNetOffUnAllocableIncome contextRef="OneD" decimals="-4" unitRef="INR">115050000</in-capmkt:OtherUnallocableExpenditureNetOffUnAllocableIncome><in-capmkt:SegmentProfitBeforeTax contextRef="OneD" decimals="-4" unitRef="INR">896320000</in-capmkt:SegmentProfitBeforeTax><in-capmkt:DescriptionOfReportableSegment contextRef="OneReportable31D">Information technology services</in-capmkt:DescriptionOfReportableSegment><in-capmkt:SegmentAssets contextRef="OneReportable31I" decimals="-6" unitRef="INR">0</in-capmkt:SegmentAssets><in-capmkt:DescriptionOfReportableSegment contextRef="OneReportable32D">Knowledge Service</in-capmkt:DescriptionOfReportableSegment><in-capmkt:SegmentAssets contextRef="OneReportable32I" decimals="-6" unitRef="INR">0</in-capmkt:SegmentAssets><in-capmkt:SegmentAssets contextRef="OneI" decimals="-6" unitRef="INR">0</in-capmkt:SegmentAssets><in-capmkt:UnAllocableAssets contextRef="OneI" decimals="-6" unitRef="INR">0</in-capmkt:UnAllocableAssets><in-capmkt:NetSegmentAssets contextRef="OneI" decimals="-6" unitRef="INR">0</in-capmkt:NetSegmentAssets><in-capmkt:DescriptionOfReportableSegment contextRef="OneReportable41D">Information technology services</in-capmkt:DescriptionOfReportableSegment><in-capmkt:SegmentLiabilities contextRef="OneReportable41I" decimals="-6" unitRef="INR">0</in-capmkt:SegmentLiabilities><in-capmkt:DescriptionOfReportableSegment contextRef="OneReportable42D">Knowledge Service</in-capmkt:DescriptionOfReportableSegment><in-capmkt:SegmentLiabilities contextRef="OneReportable42I" decimals="-6" unitRef="INR">0</in-capmkt:SegmentLiabilities><in-capmkt:SegmentLiabilities contextRef="OneI" decimals="-6" unitRef="INR">0</in-capmkt:SegmentLiabilities><in-capmkt:UnAllocableLiabilities contextRef="OneI" decimals="-6" unitRef="INR">0</in-capmkt:UnAllocableLiabilities><in-capmkt:NetSegmentLiabilities contextRef="OneI" decimals="-6" unitRef="INR">0</in-capmkt:NetSegmentLiabilities><in-capmkt:DisclosureOfNotesOnSegmentsExplanatoryTextBlock contextRef="OneD">* Other unallocable expenses include Rs. 245.83 million towards impact of New Labour Codes for the quarter and year ended December 31, 2025. (refer to Note 5) &lt;BR&gt; 
 &lt;BR&gt; 
Assets and liabilities of the Group are used interchangeably between segments and the Chief Operating Decision Maker (CODM) does not review assets and liabilities at reportable segment level. Accordingly, in line with the requirements of Ind AS 108 - Operating Segments, disclosure relating to segment assets and liabilities has not been provided.</in-capmkt:DisclosureOfNotesOnSegmentsExplanatoryTextBlock><in-capmkt:DescriptionOfItemThatWillNotBeReclassifiedToProfitAndLoss contextRef="D_ItemsThatWillNotBeReclassifiedToProfitAndLoss11">Re-measurements of the defined benefit plans</in-capmkt:DescriptionOfItemThatWillNotBeReclassifiedToProfitAndLoss><in-capmkt:AmountOfItemThatWillNotBeReclassifiedToProfitAndLoss contextRef="D_ItemsThatWillNotBeReclassifiedToProfitAndLoss11" decimals="-4" unitRef="INR">31660000</in-capmkt:AmountOfItemThatWillNotBeReclassifiedToProfitAndLoss><in-capmkt:AmountOfItemThatWillNotBeReclassifiedToProfitAndLoss contextRef="OneD" decimals="-4" unitRef="INR">31660000</in-capmkt:AmountOfItemThatWillNotBeReclassifiedToProfitAndLoss><in-capmkt:IncomeTaxRelatingToItemsThatWillNotBeReclassifiedToProfitOrLoss contextRef="OneD" decimals="-4" unitRef="INR">7970000</in-capmkt:IncomeTaxRelatingToItemsThatWillNotBeReclassifiedToProfitOrLoss><in-capmkt:DescriptionOfItemThatWillBeReclassifiedToProfitAndLoss contextRef="D_ItemsThatWillBeReclassifiedToProfitAndLoss11">Fair value changes on derivatives designated as cash flow hedge</in-capmkt:DescriptionOfItemThatWillBeReclassifiedToProfitAndLoss><in-capmkt:AmountOfItemThatWillBeReclassifiedToProfitAndLoss contextRef="D_ItemsThatWillBeReclassifiedToProfitAndLoss11" decimals="-4" unitRef="INR">-180420000</in-capmkt:AmountOfItemThatWillBeReclassifiedToProfitAndLoss><in-capmkt:DescriptionOfItemThatWillBeReclassifiedToProfitAndLoss contextRef="D_ItemsThatWillBeReclassifiedToProfitAndLoss12">Foreign currency translation reserve</in-capmkt:DescriptionOfItemThatWillBeReclassifiedToProfitAndLoss><in-capmkt:AmountOfItemThatWillBeReclassifiedToProfitAndLoss contextRef="D_ItemsThatWillBeReclassifiedToProfitAndLoss12" decimals="-5" unitRef="INR">149900000</in-capmkt:AmountOfItemThatWillBeReclassifiedToProfitAndLoss><in-capmkt:AmountOfItemThatWillBeReclassifiedToProfitAndLoss contextRef="OneD" decimals="-4" unitRef="INR">-30520000</in-capmkt:AmountOfItemThatWillBeReclassifiedToProfitAndLoss><in-capmkt:IncomeTaxRelatingToItemsThatWillBeReclassifiedToProfitOrLoss contextRef="OneD" decimals="-4" unitRef="INR">-45410000</in-capmkt:IncomeTaxRelatingToItemsThatWillBeReclassifiedToProfitOrLoss><in-capmkt:OtherComprehensiveIncome contextRef="OneD" decimals="-4" unitRef="INR">38580000</in-capmkt:OtherComprehensiveIncome></xbrli:xbrl>