In e-commerce you can use several different payment options, and usually each of them have different transaction fees & handling costs. With this Prestashop module you can have additional fees or discounts depending on the payment module used. You can have a surcharge or discounts by a percentage of the order or a set amount, or both.

The module also let's you limit the fee/discount to a specific customer group.

The module displays the additional fee or discount in the order details & invoice. You can also inform your customers how much they would save/pay extra for a particular payment method in the payment summary page during checkout.