I’ve tried to find a solution thru the theme and woocommerce itself and searched the web as well however could’t find any info regarding my problem.
I’d like to add an additional cost to specific payment methods, especially to PayPal. So once the user is at the checkout, I’d like to modify the total cost accordingly once he chooses one of the payment methods that I defined an extra charge.
Currently this is not possible. However I think this is a “must-have” feature and probably we’ll create an extension which allows you to add an additional fee based on the selected payment gateway. I’m not aware of a clever workaround – maybe you can use variations or shipping classes to charge additional fees.