Hello @RitaG1027 thanks for your post. Are you talking about adding a fee to the sale to cover the cost of processing the customer's credit card? Or are you talking about making multiple charges automatically to a customer's card (sort of like a payment plan)? If you're talking about Afterpay services that are like a payment plan, you shouldn't have to do anything on your end to receive those payments. If you have it setup to accept that form of payment, Square should handle those transactions for you.
Now if you're talking about recouping the processing fee...that cannot be set to automatically calculate the % for you. You can setup a service fee, but that would be a flat fee, or you'd have to manually calculate it. Be careful here though...there are some legal issues in passing on credit card processing fees to your customers. Please Google this issue, and search the forums here for other sellers who have asked the same question.
Credit card processing fees are generally seen as a cost of doing business, and you can deduct those as a valid biz expense on your taxes, thereby reducing your tax liability. It also keeps your customers happy because no shopper likes to pay additional fees for using their credit card. It's a win-win for biz and customers. I understand you see the fee as an extra charge that is costing you money, but there are costs associated with the moving of money between accounts (so the nominal processing fee covers that). If you want to avoid this all to together, you can create a CASH ONLY policy for your customers...but again, Customers don't like that usually. It's all about being super focused on your customer and proving a great shopping experience. Good luck to you, and I hope this helped to answer your question.
