Additional costs before payment
Payment services like PayPal take a commission on all transactions. Many merchants ask us, as agency, to impact the total to paid by customers on the last step of checkout process, before choosing the payment option (the percentage to impact is of course different for each payment module). We could have a new field that represents various additional costs and hooks to manage the amount via modules.
Anthony Girard commented
Hi PS Team! Thanks for your reply.
We know this kind of module as we used it for one of our stores :-)
The only "problem" is it does not work with other payment services...
Hello Anthony, thanks for the feedback! Check this module ( https://addons.prestashop.com/en/payment-card-wallet/11009-paypal-surcharge-extra-fee.html ), it allows merchants to handle Paypal fees by adding a percentage of the total purchase.