Imagine a hypothetical dinner in Lisbon. The bill comes to €84. The server brings a card terminal to the table, taps a few buttons and hands it to you. The screen offers a choice: pay €84.00 or pay $98.71 USD, with a line underneath promising “a guaranteed exchange rate.” Paying in dollars feels safer. You know exactly what you’re spending.
That’s the most expensive button on the screen. Choosing dollars lets the merchant’s payment processor do the currency conversion at a rate it sets, which is often several percent worse than the rate your card network would use. On a single dinner it’s a few dollars. Over a two-week trip of hotels, rental cars and restaurants, it adds up fast.
The fix is simple once you know it exists: pay in the local currency. Here’s what else is worth knowing before you travel.
The three costs that hit travelers
Foreign transaction fees
Many US credit cards charge a foreign transaction fee, commonly around 3% of each purchase. Federal rules treat it as part of the cost of credit, and the CFPB’s official commentary on Regulation Z describes how it can be layered: a network charge plus an issuer charge, for example 1% plus 2%.
Two details people miss:
- The fee usually applies to any transaction processed outside the US, even if it’s in dollars. That includes some online purchases from foreign merchants made from your couch.
- It shows up as a separate line item or folded into the converted amount, depending on the issuer, so you may not notice it until you look closely at the statement.
Plenty of cards, especially travel-oriented ones, charge no foreign transaction fee at all. Check your card’s pricing table before the trip. If your only card charges 3%, a hypothetical $4,000 in trip spending costs about $120 in fees alone.
Dynamic currency conversion
That’s the dollars-or-euros prompt from the restaurant. It’s called dynamic currency conversion, and it shows up at card terminals, hotel checkouts, car rental counters and ATMs. The merchant or ATM operator sets the exchange rate and typically builds in a markup.
Two things make it tricky. First, it can be offered quietly, with a clerk asking “Dollars okay?” and pressing the button before you answer. Second, if your card does charge a foreign transaction fee, choosing dollars doesn’t necessarily avoid it, because the transaction is still processed abroad. You may pay the markup and the fee.
Always choose the local currency. If a receipt shows a conversion to dollars you didn’t approve, ask for the charge to be voided and rerun in local currency on the spot.
Cash advances at ATMs
Using a credit card at a foreign ATM is a cash advance. That usually means a cash advance fee, often a percentage of the amount with a dollar minimum, plus a higher APR that starts accruing the same day with no grace period. Add a local ATM operator fee and a foreign transaction fee, and a $200 withdrawal can easily cost $15 to $20 before you’ve spent a cent. The mechanics of credit card interest explain why there’s no grace period on cash.
For cash, a debit card from a bank that charges low or no foreign ATM fees is usually a much cheaper tool.
Habits that make card use abroad smoother
Bring two cards on different networks
Visa and Mastercard are accepted almost everywhere that takes cards. American Express and Discover have narrower acceptance in many countries. Carrying one Visa and one Mastercard covers you if a terminal rejects one, and keeping them in different places protects you if a wallet goes missing.
Set up the app and alerts before you leave
Many issuers no longer require travel notices, because their fraud systems use your phone and card activity to recognize travel. Still, it’s worth checking your issuer’s app. Make sure transaction alerts are on, that you can lock the card from the app, and that you know how to reach the issuer from abroad. The toll-free number on the back of the card may not work internationally, so note the collect or international number.
Use contactless or your phone’s wallet
Tap-to-pay is standard in much of Europe, Asia and Latin America, often more so than in the US. Paying with a phone wallet also keeps your actual card number off the merchant’s systems.
Watch for holds at hotels, car rentals and gas pumps
These merchants often place an authorization hold larger than your final bill. Holds can tie up a meaningful chunk of your credit limit for days. If your limit is modest, ask how much will be held and when it will be released.
Keep your receipts until the statement posts
Foreign charges can post days later, sometimes at slightly different converted amounts. Receipts make disputes much easier.
Packing list for your wallet
- A primary credit card with no foreign transaction fee, ideally Visa or Mastercard.
- A backup credit card on the other network, stored separately.
- A debit card for ATM withdrawals with low or no foreign ATM fees.
- A small amount of local cash for taxis, tips and places that don’t take cards.
- Your issuers’ international phone numbers, saved in your phone and written on paper.
- The habit: always pay in local currency, and never use a credit card for cash.
Frequently asked questions
What if my card is lost or stolen abroad?
Lock it in the app and call the issuer’s international number right away. Your liability protections for unauthorized credit card charges apply wherever the card was used; the FTC explains the limits. Many issuers can send an emergency replacement card. For a broader action plan, see what to do in the first 24 hours after card fraud.
Do I need a chip-and-PIN card?
Most US cards are chip-and-signature, and they work at nearly all staffed terminals abroad. Some unattended machines, like certain train ticket kiosks or fuel pumps, may require a PIN. Ask your issuer whether your card has one, and use contactless where possible.
Is it cheaper to exchange cash before I leave?
Usually not. Airport and bank currency exchanges in the US tend to offer weaker rates than a low-fee debit card withdrawal at a bank ATM at your destination. A small amount for arrival is fine.
Do foreign transaction fees apply to online purchases?
They can. If the merchant processes the payment outside the US, the fee may apply even if the price was shown in dollars.
