Click on the gear icon to open the Configuration and Settings menu.
In the menu on the left click Finance > Credit Card Surcharge.
Enter the surcharge amount you wish to charge.
If you would like to allocate the surcharge to a particular GL code then you can enter the details into the accounting fields. If you have integrated with Xero, select the appropriate options from the dropdown menus.
Click the Save button.
The surcharge is applied automatically to all payments, it appears on the invoice as a separate line item.