diff --git a/CompanyManagment.EFCore/Repository/InstitutionContractRepository.cs b/CompanyManagment.EFCore/Repository/InstitutionContractRepository.cs
index 44cd56e9..34c71438 100644
--- a/CompanyManagment.EFCore/Repository/InstitutionContractRepository.cs
+++ b/CompanyManagment.EFCore/Repository/InstitutionContractRepository.cs
@@ -2002,7 +2002,7 @@ public class InstitutionContractRepository : RepositoryBase<long, InstitutionCon
                 DiscountedAmount = discountAmount.ToMoney(),
                 DiscountPercetage = request.DiscountPercentage,
                 Installments = InstitutionMonthlyInstallmentCaculation((int)request.Duration,
-                    totalAmount, DateTime.Now.ToFarsi()),
+                    paymentAmount, DateTime.Now.ToFarsi()),
                 OneMonthAmount = discountedOneMonthAmount.ToMoney(),
                 Obligation = totalAmount.ToMoney()
             };