Your bank card works overseas, but the fees and exchange rates will cost you unless you plan ahead

When you use a debit or credit card outside the United States, your bank charges you for the currency conversion and often adds a foreign transaction fee on top. A single purchase abroad can cost 3 to 5 percent more than the same purchase at home, split between the exchange rate markup and flat fees. The good news is that some cards charge nothing, some banks waive fees for certain account types, and you can reduce what you pay by knowing which card to use and when.

The real cost depends on three things: whether your card has a foreign transaction fee, what exchange rate your bank uses, and whether the merchant or your bank does the conversion. You control the first two by choosing the right card before you leave. The third one happens whether you want it to or not — but you can refuse it at the point of sale.

Key Takeaways

  • Foreign transaction fees range from zero to 3 percent per purchase, and many banks charge them on both credit and debit cards.
  • Your bank's exchange rate is almost always worse than the real market rate, so using a card that doesn't mark up the rate saves money on every transaction.
  • When a merchant asks whether to charge in dollars or the local currency, always choose the local currency — the merchant's conversion is worse than your bank's.
  • Notify your bank before you travel so it doesn't block your card as fraud, and ask which card in your wallet has the lowest fees abroad.
  • ATM withdrawals usually cost less per dollar than multiple small card purchases, so taking out cash once can be cheaper than paying fees on ten transactions.

Understanding foreign transaction fees and exchange rate markups

A foreign transaction fee is a flat percentage your bank charges every time you use your card outside the United States. Most banks charge between 1 and 3 percent. Some charge nothing. The fee applies whether you're buying a coffee or paying a hotel bill, and it stacks on top of the exchange rate your bank uses.

The exchange rate markup is separate. Your bank doesn't use the real market rate — the one you see on financial news sites. Instead, it uses a rate that's 1 to 2 percent worse, keeping the difference. A Visa or Mastercard network rate is usually better than what your bank adds on top, but your bank still marks it up. American Express and Discover often mark up their rates more than Visa and Mastercard do.

Together, these two costs mean a 100-euro purchase might cost you $110 instead of $108. That gap grows with every transaction. Over a two-week trip with daily card use, you could lose $50 to $100 just in fees and markups.

Which cards charge nothing or very little abroad

Some credit cards have zero foreign transaction fees. These are usually travel rewards cards or premium cards that charge an annual fee. If you travel regularly, the annual fee often pays for itself in savings. Check your card's terms or call the number on the back to ask directly — the answer is yes or no, and customer service can tell you in one minute.

Debit cards are trickier. Most banks charge a foreign transaction fee on debit card purchases, even if they don't charge one on credit cards. However, some online banks and credit unions charge nothing on either. If you bank with a large national bank, call and ask whether they have a checking account or debit card with no foreign fees. If they don't, consider opening a second account at an online bank before you travel — it takes 10 minutes and costs nothing.

Even if your main card charges fees, having one card that doesn't means you can use it for the biggest purchases and save the most money. A card with no foreign transaction fee used for a $500 hotel charge saves you $5 to $15 compared to a card that charges 1 to 3 percent.

Notifying your bank and choosing which card to use

Call your bank or credit card company at least three days before you leave. Tell them the countries you're visiting and the dates you'll be there. Banks flag foreign transactions as potential fraud, and a blocked card in another country is expensive and stressful. Notification doesn't may provide your card won't be blocked, but it makes it much less likely.

When you call, ask which card in your wallet has the lowest foreign transaction fee, or whether any of them have zero fees. Write down the answer. If you have multiple cards, use the one with no fee or the lowest fee for most purchases. Save other cards for situations where the merchant doesn't take your preferred card.

Bring at least two cards — a credit card and a debit card, or two credit cards. If one gets lost, stolen, or blocked, you still have money access. Keep them in separate places in your luggage.

Dynamic currency conversion: why you should always refuse it

At some point during your trip, a merchant or ATM will ask whether you want to be charged in dollars or the local currency. This is called dynamic currency conversion. Always choose the local currency.

When you choose dollars, the merchant or ATM does the conversion for you using their own exchange rate — which is always worse than your bank's rate. You pay the merchant's markup plus your bank's markup, which can add 4 to 8 percent to the cost. When you choose the local currency, your bank does the conversion later using its rate, and you pay only your bank's markup.

The merchant will often make it sound like choosing dollars is easier or safer. It isn't. It's more expensive. The screen might say "may provide rate" or "lock in your price" — these phrases are sales tactics. Your bank's rate, even with its markup, is better than what the merchant is offering.

ATM withdrawals versus card purchases: which costs less

An ATM withdrawal usually costs a flat fee — often $2 to $5 per withdrawal — plus your bank's exchange rate markup. A card purchase costs a percentage fee (if your card charges one) plus the exchange rate markup. For small purchases, the percentage fee is smaller than the flat ATM fee. For large purchases or many small purchases, withdrawing cash once might cost less overall.

Do the math before you go. If your bank charges $3 per ATM withdrawal and 2 percent foreign transaction fee on card purchases, withdrawing $300 once costs about $9 in fees. Making 10 card purchases of $30 each costs about $6 in transaction fees plus the exchange markup on each one. But if you make 20 small purchases, the card fees add up to $12 plus markups, making the single ATM withdrawal cheaper.

Most travelers find that withdrawing cash once or twice during a trip, then using cards for larger purchases, costs less than using cards for everything. Ask your bank what its ATM fees are in the countries you're visiting — some banks have partnerships with foreign banks and charge nothing.

Protecting your cards while traveling

Carry cards in a money belt or inside pocket, not a backpack or back pocket. If your card is lost or stolen, call your bank immediately — the number is on your statement or your bank's website. U.S. law limits your liability for fraudulent charges to $50 if you report the loss quickly, and most banks waive even that.

Use ATMs in banks or busy, well-lit locations rather than street ATMs. Avoid using your card at unattended kiosks or machines that look damaged or unusual. If a machine feels wrong, don't use it — find another one.

Check your account online or by phone every few days. If you see a charge you don't recognize, report it to your bank right away. Most banks can reverse fraudulent charges within a few days.

Frequently Asked Questions

Should I exchange money before I leave or use ATMs abroad?

ATMs abroad usually offer a better exchange rate than airport currency exchanges or banks at home. Withdraw money once you arrive rather than exchanging dollars before you leave. If you're nervous about ATMs, exchange a small amount before you go — maybe $50 to $100 — and use ATMs for the rest.

What if my card gets declined while I'm traveling?

Call your bank immediately using the number on the back of your card or your bank's website. The decline might be fraud protection, a technical glitch, or a real problem with your account. Your bank can tell you in minutes and often can unblock the card over the phone. This is why bringing two cards matters — you have backup access while you sort it out.

Do credit cards or debit cards work better abroad?

Credit cards usually have better fraud protection and lower foreign transaction fees than debit cards. However, some merchants abroad prefer debit cards, and some ATMs only take debit cards. Bring both if you can. If your debit card charges foreign fees and your credit card doesn't, use the credit card for purchases and the debit card only for ATM withdrawals.

Is travel insurance worth it for card protection?

Travel insurance can cover lost cards and emergency cash advances, but U.S. law already limits your liability for fraudulent charges. Read what your card issuer covers before you buy insurance — many credit cards include travel protections automatically. If your card doesn't, travel insurance might be worth the cost, especially on longer trips.

Can I use my phone to pay instead of a card?

Mobile payment apps like Apple Pay and Google Pay work in many countries and often charge the same foreign transaction fees as your physical card. Check with your bank before you travel to confirm your phone payment method will work abroad. It's a good backup if your physical card is lost, but it doesn't save you money on fees.