diff --git a/Marco.Pms.Services/Service/ExpensesService.cs b/Marco.Pms.Services/Service/ExpensesService.cs
index 0028578..57e7187 100644
--- a/Marco.Pms.Services/Service/ExpensesService.cs
+++ b/Marco.Pms.Services/Service/ExpensesService.cs
@@ -1855,7 +1855,7 @@ namespace Marco.Pms.Services.Service
             if (model.StatusId == Processed)
             {
                 var totalAmount = model.BaseAmount + model.TaxAmount;
-                if (totalAmount.HasValue || totalAmount != paymentRequest.Amount)
+                if (!totalAmount.HasValue || totalAmount != paymentRequest.Amount)
                 {
                     // Log the mismatch error with relevant details
                     _logger.LogWarning("Payment amount mismatch: calculated totalAmount = {TotalAmount}, expected Amount = {ExpectedAmount}", totalAmount ?? 0, paymentRequest.Amount);