Credit card fees are not deductible for individuals and are deductible for businesses. Businesses can deduct all credit card fees as well as finance charges. Businesses are eligible to deduct credit or debit card processing fees associated with paying taxes, but individuals are not.
However, surcharging debit card transactions or prepaid cards, even when charged with a signature debit, is illegal. In the United States, there are two states and one territory where credit card surcharging is not legally allowed: Connecticut, Massachusetts, and Puerto Rico (as of January 2023).