If you’d like to add a credit card surcharge to credit card paying accounts, a setting can be turned on that allows you to set a percentage or a fixed amount:
Accounts also MUST have the setting ‘Require Payment To Order’ turned on, in their account.When items are added to an order, the user will see the credit card fee listed:
When the user is shown the Payment window, they’ll see the same values as the order totals: