Travel money
Travel money in South Korea: cash or card?
What to expect when you actually pay for things in South Korea — the currency, how far a card gets you, and the money mechanics that quietly cost travellers more than they realise.
The currency
South Korea uses the South Korean won (KRW), written ₩.
Cash or card?
One of the most card-dense countries anywhere — cards are accepted for very small amounts and often preferred. Foreign cards are the weak point: some domestic terminals and transit systems only take Korean cards, so keep enough cash for those cases.
Getting South Korean won
However you get hold of KRW — an ATM, an exchange desk, cash you brought — you will not receive the mid-market rate you see on a converter app. The fee, the spread and your own bank's charges are all folded in somewhere.
The only figure worth recording is your effective rate: the South Korean won you actually received, divided by what your account was actually debited. Value everything you buy from that pile of cash at that rate and the fees are automatically accounted for, spread across your spending instead of sitting in a line item you have to remember. The full method is here.
Always pay in KRW, never your home currency
When a card terminal, hotel desk or ATM in South Korea offers to charge you in your home currency instead of KRW, decline. That is dynamic currency conversion, and it hands the exchange rate to the merchant's processor rather than your card network — at a rate that is essentially always worse.
It is offered as a convenience, and a familiar currency does feel safer, which is exactly why it works. Choosing KRW is the easiest money you will save on the entire trip.
Your card charge will not match the price you paid
A card payment in South Korea is authorised in KRW on the day, then settled one to three business days later at the rate in force when it clears — plus any foreign transaction fee your bank adds. The number on your statement is decided on a day you may no longer be in the country.
This matters for a budget more than people expect: if you record spending by statement date, purchases drift days forward and can land under the wrong country entirely. Why this happens, and what to do about it.