Account Payment Discount

This module adds early payment discount handling to the payment lines used when you prepare payments in batch.

On each payment line you now see the invoice's discount due date, the discount amount and a "Pay with discount" checkbox. These fields only appear when the invoice's payment terms actually offer an early payment discount. The checkbox is ticked automatically when the discount due date is still in the future compared with the payment date (or the scheduled date for fixed-date payments), and unticked otherwise.

When you tick it, the payment line amount is replaced by the discounted amount, and the difference between the residual amount and the discounted amount is shown as the discount amount. If the invoice is linked to refunds, their discount amounts are included too.

When the payment is created, the module adds the corresponding early payment discount accounting entries, so the discount is booked correctly instead of leaving the invoice partly unpaid.

In the wizard that selects which invoice lines to pay, a new "Discount Due Date" option lets you filter lines whose discount due date is on or after a chosen date, so you can pick only the invoices still eligible for the discount.

It works together with account.payment.line, account.payment.line.create and account.move, and also allows discounts on refunds.