A cross border fee is the fee charged to a merchant when a customer uses a credit card as payment for purchases or services from an issuing bank not located in the same country as the merchant's processing account.

A "border fee" (also known as a cross-border fee or international transaction fee) is a charge applied by financial institutions and payment processors when a transaction involves an entity located in a different country than where the payment method was issued. For travelers, this most commonly appears as a 1% to 3% surcharge on credit card purchases made in a foreign country, even if the transaction is processed in your home currency. The fee is split between the card-issuing bank and the payment network (like Visa or Mastercard) to cover the costs of international currency conversion, operational risks, and compliance with varying international regulations. Beyond banking, "border fee" can also refer to entry or exit taxes charged by a government when crossing a national boundary, such as the "reciprocity fees" some South American countries charge certain nationalities or the "tourist taxes" found at many island borders. To avoid banking-related border fees, frequent travelers often use cards specifically marketed as having "No Foreign Transaction Fees." When dealing with physical borders, it is always wise to research the specific entry requirements and potential cash fees for your destination to avoid delays at customs.