On top of the Merchant Service Charge, businesses also need to account for incidental expenses relating to card payments, such as chargeback and refund processing fees.  A chargeback occurs when a customer disputes a transaction, leading to additional fees for your business. Similarly, refunds can also incur fees, depending on your payment processor’s policies. These incidental costs can add up, so it’s essential to factor them into your financial analysis. Additionally, some payment processors might charge a monthly fee or have a minimum contract length. This makes it really important to understand the terms of any contracts thoroughly before you sign on the dotted line.