How do I add 3% credit card fee to an invoice?

First thing is to check your state laws, there are some states where surcharging for using a CC is illegal.

For those states that are ok with it, there is still a problem. You are required to put a notice on the store, the check out pages, and on the receipt it must specify the surcharge item and amount, that you surcharge for using a CC and how much, the law says a % is not legal. In addition to that, you are not allowed to surcharge when a debit or prepaid card is used at all. So if you are taking payments on line I don't see how you can know whether or not a card is a prepaid or debit card in advance.

You would have to create a service type item called surcharge and include it on the invoice for the customer, that would mean you know in advance they will use a CC, and not a debit or prepaid card

Best option is just raise your prices slightly, or accept that a merchant charge is just a cost of doing business.

@sandientllc 

Another option, ask your customers to utilize MP to pay the invoice by credit cards. Stretch your clients’ cash flow by creating up to a 45-day float by paying bills via a credit card, even if the vendor doesn’t accept credit cards. Vendors get paid with a physical check or with electronic bank transfers.

https:// melio.grsm.io/quickbooks