Customers do not pay a fee when using Square unless the merchant applies a service charge to sales. However, Square charges sellers 2.6% of sales and $0.10 for processing contactless payments, 3.5% and $0.15 for manually keyed-in payments, 2.9% and $0.30 for invoice payments, and 3.5% and $0.15 for invoices with cards on file. Other payment types have different fee structures. Square registers purchased before August 20, 2019, have a flat fee—2.5% and $0.10—for all payment types. Square does not, however, charge for recording payments.