A user can set up convenience fees as well as surcharge fees to add additional one-time fees to each payment collected from your customers. Keep in mind that Convenience fees are a flat fee that apply to both ACH and card while Surcharge fees are a percentages that apply to card only.
Both Convenience and Surcharge fees can be added and changed on the Settings page if you go to Misc Settings, then Processing Fees:
After selecting the fee you would like to input, you can then fill out the amount you would like to charge.
Note: A surcharge fee has a maximum of 4% - view surcharge rules
Note: Convenience fees and Surcharge fees will apply to online forms/email requests