The interchange fee is the biggest credit card fee you may have never heard of. This fee is a percentage of each transaction that Visa and MasterCard collect from retailers every time a credit or debit card is used to pay for a purchase. Nearly $2 of every $100 American consumers put on credit cards goes directly to the credit card industry through the interchange fee. While this fee is not directly charged to the consumer, prices on goods and services are increased by merchants to account for these fees, so if they didn’t exist you could be spending less.
The Five Most Annoying Credit Card Fees