Pay in won, or in your own currency?
Your card will work almost everywhere in Korea — acceptance is among the highest in the world, and you rarely need much cash beyond traditional markets and some street food. The question that actually costs you money is which currency the terminal charges.
When it offers to bill you in your own currency instead of won, that is dynamic currency conversion, and the exchange rate is set by the merchant's acquirer rather than your card network. The usual advice — always pay in won — is right most of the time but not always: declining the offer is cheaper only when the markup on the terminal is higher than your own card's foreign transaction fee.
That is normally the case, because DCC markups commonly run 3–7% while card fees run 0–3% — but a card with a 3% fee facing a 2% markup is better off accepting. The calculator below compares all three routes — won, DCC, and a multi-currency card — on your own figures.
Work out your own numbers
Adjust the fee assumptions— defaults: card 1.5%, DCC 5%, multi-currency 0.6%
Cheapest route on this purchase
Multi-currency card — $71.00
The worst option (Accept DCC (pay in your currency)) costs $3.11 more on this one payment. Across ₩1,500,000 of card spend that gap becomes $46.58.
| Option | You pay | vs mid-market |
|---|---|---|
| Multi-currency cardcheapest Card converts at close to the mid-market rate; no issuer FX fee. | $71.00 | $0.42 (0.60%) |
| Pay in KRW (decline DCC) Card network converts, then your issuer adds its foreign transaction fee. | $71.63 | $1.06 (1.50%) |
| Accept DCC (pay in your currency) The merchant's acquirer converts, at a rate it sets. | $74.10 | $3.53 (5.00%) |
What to do at the terminal
- Ask which currency the terminal is set to. DCC is often pre-selected, and in some cases it is applied without being offered.
- Read the markup if it is shown. Disclosure rules require the rate or margin to be presented, though how prominently varies.
- Compare against your own card's fee rather than assuming either option wins. That is what the calculator above is for.
Removing the choice entirely
A multi-currency account converts close to the mid-market rate and does not add an issuer foreign transaction fee, which in most combinations lands below both paying in won and accepting DCC. It does not make conversion free — the provider takes its own fee, which is the third input in the calculator.
Same trip, next decision
What we measure, and what we don't
We collect exchange rates once a day and publish the history, so the rate used above is a real observation with a date attached. We do not measure your issuer's fee, the acquirer's markup, or a specific provider's conversion fee — those are set per card and per merchant, so we ask you for them instead of inventing figures.
Quick answers
Can I use my credit card in Korea?
Almost everywhere in the cities — card acceptance in Korea is among the highest in the world, and visitors rarely need much cash beyond traditional markets and some street food. The question that actually costs you money is not whether the card works but which currency the terminal charges it in: when it offers your home currency instead of won, that conversion carries a markup you can usually avoid.
What is dynamic currency conversion (DCC)?
When you pay by card abroad, the terminal may offer to bill you in your home currency instead of the local one. That conversion is performed by the merchant’s acquirer at a rate it chooses, rather than by your card network.
Is declining DCC always cheaper?
No. Paying in the local currency shifts conversion to your card network but your issuer may then add a foreign transaction fee. Whether declining is cheaper depends on the DCC markup offered versus your own card’s fee, which is why this page asks you for both.
How can I avoid both costs?
A multi-currency account or card converts close to the mid-market rate and does not add an issuer foreign transaction fee, so it usually lands below both options. The remaining cost is that provider’s own conversion fee.