diff --git a/hrms/payroll/doctype/salary_slip/salary_slip.py b/hrms/payroll/doctype/salary_slip/salary_slip.py
index 5001308d5f..b07f7c9c45 100644
--- a/hrms/payroll/doctype/salary_slip/salary_slip.py
+++ b/hrms/payroll/doctype/salary_slip/salary_slip.py
@@ -1616,7 +1616,7 @@ def get_taxable_earnings(self, allow_tax_exemption=False, based_on_payment_days=
 
 					taxable_earnings -= flt(amount - additional_amount)
 					additional_income -= additional_amount
-					amount_exempted_from_income_tax = flt(amount - additional_amount)
+					amount_exempted_from_income_tax += flt(amount - additional_amount)
 
 					if additional_amount and ded.is_recurring_additional_salary:
 						additional_income -= self.get_future_recurring_additional_amount(