*** Available Only on Desktop ***

If you have Online Payments enabled, you can add an additional charge if your customer pays with a credit card. 

 *** Note- there are states where card surcharges are not allowed. Please make sure before applying ***

 Go to Sales > Invoices > Settings

Scroll down to enter the processing fees you would like to charge. Each payment processor has their own processing fees, so it is advised that you see what they are charging so that you can apply it to your customers.

Click Save Changes.

You are all set! Now the Payment Processing fees will be added to the invoice only when your customers pay online.

Here is a video showing how to do this.