Square Invoices Fees
You can send an unlimited number of invoices for free and be charged when the invoice is paid by the customer. The fee is 2.9% + 30¢ per invoice paid online with a credit card, co-branded debit card, Apple Pay and Google Pay, and Interac debit card via Apple Pay and Google Pay. Invoices paid in person are charged 2.65% per card-present credit card transaction or 10¢ per card-present Interac transaction.
If you’re using Card on File to save customer payment cards, you’ll pay a slightly higher fee of 3.4% + 15¢ when a stored card is used to pay an invoice.
You can read more about how processing fees and rates are calculated.