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 a confirmation:
When capturing the charge, you will also see the same values, along with a credit card that may have been selected to be used:
And the final amount is shown on the order that was charged: