Currency conversion fee
A currency conversion fee is what you pay to swap one currency for another when you pay by card or send money. It is usually a percentage on top of the rate or a markup hidden in the rate.
How it works
When the purchase currency differs from your card's currency, the money has to be exchanged. The card network applies its rate, and the card issuer may add a percentage, often around 1–3%. Sometimes there is no separate line, and the markup is hidden in a rate worse than the market one.
Crypto cards can convert twice: first crypto or a stablecoin into the card currency, and then, if you pay abroad, the card currency into the local one. Each step can carry its own markup, so the final cost of a purchase can be noticeably higher than it looks.
A separate trap is dynamic currency conversion (DCC), where a terminal or ATM abroad offers to charge you in your card's own currency. The rate in that offer is usually worse than your card's, so paying in the local currency is almost always cheaper.
Your card is in dollars, the purchase is €100, and the network rate is 1.10. Without a fee you pay $110. With a 2% conversion fee you pay $110 + $2.20 = $112.20.
A terminal abroad offers DCC: "Pay $115 instead of €100?". Choosing euros costs $112.20 through your own card, so accepting dollars would cost you another $2.80.
Beginners compare cards only by monthly fee and ignore the exchange rate and conversion percentage. If you spend abroad regularly, that 2–3% eats more than any subscription. Check the fee table for foreign-currency transactions, compare the issuer's rate with the market rate, and pick the local currency at terminals abroad.
Questions and answers
What is a currency conversion fee in simple terms?
It is an extra charge for exchanging your currency into another one so the payment can go through. It can be a separate line or hidden in the rate.
How do I avoid currency conversion fees?
Pay with a card in the same currency as the purchase, or use a card with no foreign transaction fee. Abroad, decline the offer to pay in your home currency at the terminal.
Should I pay in local currency or my own currency abroad?
Usually local. If you pick your own, the rate is set by the terminal or the merchant's bank, and it is usually worse than your card's rate.
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Updated: 2026-10-19