diff --git a/erpnext/controllers/accounts_controller.py b/erpnext/controllers/accounts_controller.py
index b7a80c1..5a051e3 100644
--- a/erpnext/controllers/accounts_controller.py
+++ b/erpnext/controllers/accounts_controller.py
@@ -2311,7 +2311,7 @@
 	elif term.due_date_based_on == "Day(s) after the end of the invoice month":
 		due_date = add_days(get_last_day(date), term.credit_days)
 	elif term.due_date_based_on == "Month(s) after the end of the invoice month":
-		due_date = add_months(get_last_day(date), term.credit_months)
+		due_date = get_last_day(add_months(date, term.credit_months))
 	return due_date
 
 
@@ -2323,7 +2323,7 @@
 	elif term.discount_validity_based_on == "Day(s) after the end of the invoice month":
 		discount_validity = add_days(get_last_day(date), term.discount_validity)
 	elif term.discount_validity_based_on == "Month(s) after the end of the invoice month":
-		discount_validity = add_months(get_last_day(date), term.discount_validity)
+		discount_validity = get_last_day(add_months(date, term.discount_validity))
 	return discount_validity