diff --git a/account_payment_order/models/account_payment_line.py b/account_payment_order/models/account_payment_line.py
index a18686fc4..4352f859a 100644
--- a/account_payment_order/models/account_payment_line.py
+++ b/account_payment_order/models/account_payment_line.py
@@ -154,3 +154,18 @@ class AccountPaymentLine(models.Model):
             raise UserError(
                 _("Missing Partner Bank Account on payment line %s") % self.name
             )
+
+    def get_requested_date(self, default_date):
+        self.ensure_one()
+        order = self.order_id
+        # Compute requested payment date
+        if order.date_prefered == "due":
+            requested_date = self.ml_maturity_date or self.date or default_date
+        elif order.date_prefered == "fixed":
+            requested_date = order.date_scheduled or default_date
+        else:
+            requested_date = default_date
+        # No payment date in the past
+        if requested_date < default_date:
+            requested_date = default_date
+        return requested_date
diff --git a/account_payment_order/models/account_payment_order.py b/account_payment_order/models/account_payment_order.py
index b4fcb3835..534d7e36b 100644
--- a/account_payment_order/models/account_payment_order.py
+++ b/account_payment_order/models/account_payment_order.py
@@ -293,16 +293,7 @@ class AccountPaymentOrder(models.Model):
             group_paylines = {}  # key = hashcode
             for payline in order.payment_line_ids:
                 payline.draft2open_payment_line_check()
-                # Compute requested payment date
-                if order.date_prefered == "due":
-                    requested_date = payline.ml_maturity_date or payline.date or today
-                elif order.date_prefered == "fixed":
-                    requested_date = order.date_scheduled or today
-                else:
-                    requested_date = today
-                # No payment date in the past
-                if requested_date < today:
-                    requested_date = today
+                requested_date = payline.get_requested_date(today)
                 # inbound: check option no_debit_before_maturity
                 if (
                     order.payment_type == "inbound"