Dynamic currency conversion: say no every time

The terminal asks: pay in euros or in dollars? Pick euros. Local currency. Every time. That’s the rule, and you can stop reading here if you want to.

If you’d like to know why, and what to do when the cashier gets pushy, read on.

What DCC is

Dynamic currency conversion, or DCC, is a shop, hotel or cash machine offering to do the currency conversion for you at the moment you pay. You’re in Paris with a US card. The terminal shows the bill in euros and in dollars, and asks which you’d like.

Pay in euros and your own bank or card issuer does the conversion afterwards, using its own rate. Pay in dollars and the merchant’s payment company does it on the spot, using a rate it chose.

Visa describes it this way: retailers or ATMs offer to convert your transaction into your home currency, and the conversion includes an exchange rate and additional fees. Visa also says the choice is yours. That last part matters, and we’ll come back to it.

Why it costs more

Merchants are paid to offer it. A 2017 position paper from BEUC, the European consumer organisation, quotes a DCC provider’s FAQ saying the service gives the merchant a commission on each transaction. So the person holding the terminal has a reason to steer you, and the rate has room for that commission inside it.

How big is the gap? The same paper collected several studies. Stiftung Warentest in Germany found DCC added between 2.6% and 12% to prices, with store payments adding 2% to 5%. A Norwegian bank study found converting at ATMs abroad was 7.6% more expensive on average, and in 1,500 withdrawals only four were cheaper than letting the bank convert. BEUC’s summary was blunt too: the consumer is worse off in practically every case. Those are older studies from a handful of countries, so don’t treat any single percentage as today’s price. The pattern is the useful part.

Your bank’s own markup, by contrast, was described in the same document as typically 0 to 3%.

The arithmetic

Here’s a made-up dinner. Say you’re a hypothetical traveller from the US and the bill in Paris is €84.50. Assume the market rate is $1.10 per euro. Illustrative numbers, not a quote.

Option	Rate used	You pay
Pay in euros, card with no foreign fee	$1.10	$92.95
Pay in euros, card with a 3% foreign fee	$1.10 plus 3%	$95.74
Accept DCC, terminal rate	$1.17	$98.87

A rate of $1.17 against $1.10 is a markup of about 6.4%, which sits inside the range of the studies above. On that single meal the DCC choice costs $5.92 more than a no-fee card, and still $3.13 more than a card that charges a full 3%.

One meal. Do it ten times in a week and you’ve spent about $59 on nothing. Now do the cash machine. Withdraw €300 at the same 6.4% markup, and you’ve handed over about $21 for the privilege. With a 7.6% markup, the average the Norwegian study found, it’s closer to $25.

Check your own numbers on the live pair, for example USD to EUR. Rates refreshed hourly are good enough to spot a rate that’s several percent off.

The sneaky part: it looks helpful

The screen shows your home currency, a familiar number, and no sum to do in your head. That’s the pitch. It feels like a favour.

Behind it, consumer groups have flagged a few patterns. Watch for them.

One option is pre-selected, or the buttons differ in colour or size so one stands out.
The rate line is in small print, while the headline says “commission 0%”.
The ATM menu uses flashing warnings that make the local-currency choice look risky.

BEUC’s paper describes ATM menus using colours, button sizes and flashing warnings to steer people toward DCC, and a margin of 9.9% sitting in small print while the displayed commission read zero.

Nothing on that screen is lying exactly. A zero commission is not a fair rate.

What the rules say

Visa’s guidance says merchants and ATMs should show the amount in both the local and your home currency, show the exchange rate and any extra fees or markup, and offer you a choice they don’t make on your behalf. It also says they shouldn’t use design tricks such as changed font size or colour to push you one way. If you aren’t shown the details or you feel pressured, Visa’s advice is to decline the conversion and report it to your card issuer. Declining won’t stop you buying anything or withdrawing cash.

In the EU there’s an extra layer for some conversions. The EU’s cross-border payments rules (Regulation 2019/518 first introduced them, and Regulation 2021/1230 now carries them) require the total conversion charge to be shown as a percentage markup over the European Central Bank’s euro reference rate, before the payment starts, for card payments and cash withdrawals where a conversion is offered. That rule applies to conversions the regulation covers, which are not every payment you will ever make, so check what applies to the country and currency involved. Outside the EU, protection varies a lot.

Don’t rely on rules to protect you. Rely on your finger.

What to do at the till and the ATM

At a shop or restaurant

When the terminal asks which currency, choose the local one. If staff say “we’ll do it in dollars for you”, reply: “Local currency, please.” If they say your card won’t work that way, it will. Visa’s own guidance says declining doesn’t stop the purchase.

Already tapped by mistake? Ask for the transaction to be cancelled and redone before you leave. Whether that’s possible depends on the venue and the terminal, so don’t count on it.

At an ATM

Withdraw in local currency. If the machine says it will charge you at its rate, press decline. If it makes you accept conversion to continue, walk to a different machine. A bank-branded ATM is a better bet than a standalone cash point in a tourist street, though DCC shows up on both.

At hotels and car hire

Hotel and car-hire paperwork is a place where a currency choice can slip past you. Look for a line that says the charge is in your home currency, and ask for it to be put through in the local currency. Do it at check-in or at the desk, not after the card has been charged.

Is DCC ever fine?

In theory the offer could come out ahead. If you hold a card that gives you a worse rate than the terminal, the maths could flip. That’s unusual, and you’d have to know the rates, which is the very thing you can’t do at the counter. So the working rule stays: decline.

Distinguish it from a shop that simply lists its prices in your currency, such as an online store. Seeing a price in dollars on a website isn’t the same as being asked at a terminal whether to convert. Look for a choice, a rate, and a fee. Those are the signs of DCC.

Your general plan: pay by card in the local currency, take cash from a bank ATM in the local currency, and keep one small cash float for places that don’t take cards. If you want to sanity-check a charge on your statement later, look up the pair on its rate grid.

Check your statement

When the bill arrives, look at the line. If you see your home currency amount where you expected a local one, you may have accepted DCC without noticing. Note it, and next time say no sooner. If you believe you weren’t offered a real choice, Visa’s advice is to report it to your card issuer. This is general information, not a legal or financial opinion, so check with your provider about what it will do.

That’s it. Local currency. Press the button, keep the receipt, move on.

Sources

Checked: November 2026