A Card Is Not Cash

You tap your card at the subway gate. Red light. You try the machine next to it. It wants cash. The exchange booth is two exits away and closed for lunch.

Korea is one of the most card-friendly countries you will visit. That is the trap. The places that still want cash are exactly the ones a visitor hits on day one: the transit card machine, the street snack, the market stall. Plan for those and the rest is easy.

Do foreign credit cards work in Korea?

Yes, almost everywhere you shop, eat or sleep. VisitKorea notes that Visa, Mastercard, American Express and other cards are accepted at hotels, department stores and general shops, though some stores do not take them.¹ Koreans themselves paid by credit card in 46.2% of transactions in a 2024 Bank of Korea survey, and in cash in only 15.9%.²

Where a foreign card tends to fail:

Before you fly, tell your bank you are traveling and check its foreign transaction fee. A card that charges 3% on every purchase adds up over a week.

Q. Visa or Mastercard? Carry one of each if you can. Some apps and machines accept one network but not the other (see the Apple Pay section), and a second card saves a dead end.

Q. Should I pay in my home currency when the machine asks? No, choose won. Billing in your home currency is dynamic currency conversion, which uses the merchant's or ATM's exchange rate plus any fees. Visa requires the screen to show both amounts and the rate, and to let you decline.¹⁰

Does Apple Pay work in Korea?

Sometimes. Apple Pay needs a contactless (NFC) terminal and a terminal that accepts your card's network.³ In the first quarter of 2026, about 25% of card merchants in Korea could take Apple Pay: over 60% of convenience stores, cafes and big supermarkets, but only about 6% of small shops.⁴

Transit is the bright spot for iPhones. Since 18 March 2026, the Mobile Tmoney app lets visitors sign in with a "Foreigner" button and top up with cards issued outside Korea; at launch it accepted Mastercard, American Express and UnionPay, not Visa.⁵ Mastercard announced the same service in April 2026: add MobileTmoney to Apple Wallet, top up with a Mastercard, then tap your iPhone or Apple Watch on subways, buses and taxis.⁶

Q. Can I top up the Tmoney card inside Apple Wallet with my foreign card? Not inside the Wallet app itself: as of March 2026 it took top-ups only from Korean Hyundai Card cards. Use the Mobile Tmoney app instead.⁵

Does Google Pay work in Korea?

Not as a Korean service. South Korea is not on Google's list of countries where Google Wallet and tap to pay are available.⁷ A foreign card saved in Google Wallet may still work at a contactless terminal that takes your network, but test it on a small purchase first (our reading, not a Google promise).

For Android transit, Tmoney's KOREA TOUR CARD app turns an NFC phone into a transit card. Its store listing says you can charge and refund with Mastercard, Visa, American Express, JCB or UnionPay cards.⁸ Some reviews on the store page report top-up problems, so keep a physical card as backup.

Q. Which is safer to rely on, my phone or a plastic card? The plastic card. A phone battery dies, an app logs out. A 3,000 won T-money card in your wallet keeps working.

How much cash should I bring to Korea?

A little, in won. For a week in Seoul, about 50,000 to 100,000 won in cash covers transit card top-ups, street food and the odd cash-only stall (our planning estimate). Everything else goes on the card.

Korean banknotes come in 1,000, 5,000, 10,000 and 50,000 won; coins in 10, 50, 100 and 500 won.¹ Ask for 10,000 won notes. A 50,000 won note is awkward at a snack stall.

What cash is still for:

Carrying a large sum for a treatment is a different matter. Over US$10,000 in total must be declared on arrival; the rule sits in our Korea entry requirements guide. Ask your clinic how it takes payment before you travel, rather than flying with it in cash.

Q. Should I exchange money before I leave home? Only a little, if at all. You can withdraw won on arrival at a Global ATM, and Korean banks and certified exchange booths change major currencies.⁹

Where can I exchange money in Korea?

At a bank, a government-certified exchange booth, or a foreign-currency kiosk. Banks generally open 9 a.m. to 4 p.m. on weekdays.¹ Certified booths, common in tourist areas, display a "Certified" sign with currency symbols; Visit Seoul advises avoiding uncertified ones.⁹

Q. Is the airport rate worse? Exchange counters at the airport are convenient, and convenience has a price. Change only what you need for the first day, then compare in the city (our advice).

Which ATMs take foreign cards in Korea?

Look for a "Global" sign or your card network's logo on the machine.⁹ Most ATMs offer English menus, and many run until 11 p.m. or around the clock. Convenience store ATMs are everywhere but often charge higher fees.⁹

A quick routine at the machine:

Use a debit card, not a credit card, if your bank treats ATM withdrawals on credit as a cash advance with interest from day one (check your own card's terms).

Q. The ATM rejected my card. Is my card blocked? Not necessarily. Only machines with the Global sign or your network's logo are set up for foreign cards.⁹ Try one of those, and a second card, before you call your bank.

How do I buy and top up a T-money card?

Buy one at a convenience store or a station information center for 3,000 to 5,000 won, then load it.¹² Plain T-money top-ups are cash in won, from 1,000 to 90,000 won at a time in 1,000 won steps, with a maximum balance of 500,000 won.¹¹ Station machines will not load plain T-money with a credit card.¹⁵

Riding itself, from reading the map to exits and taxis, is in our Seoul transit guide.

Q. Can I pay for a taxi with T-money? Yes, T-money works in taxis.¹² Handy at night, when you do not want to fumble for notes.

Climate Card or T-money: which is cheaper for a Seoul trip?

The Climate Card short-term pass, if you ride a lot inside Seoul. It costs 5,000 won for 1 day, 8,000 for 2, 10,000 for 3, 15,000 for 5 and 20,000 won for 7 days, plus 3,000 won for the physical card.¹³ With an adult subway ride at 1,550 won on T-money, the 3-day pass pays off at about seven rides (our arithmetic).

Since 17 March 2026, you can buy the card and load short-term passes with a foreign Visa or Mastercard at 440 new machines in 273 stations on Lines 1 to 8, for a service fee of about 3.7%.¹⁴

The fine print that catches visitors:

Q. I am staying in Gangnam and my clinic is near Sinsa. Does the Climate Card help? Partly. Line 3 is covered, but the Shinbundang Line between Gangnam and Sinsa is not.¹³ If that line is your daily ride, plain T-money is simpler.

How do I get my T-money balance back before I fly?

Ask at a convenience store or a T-money top-up point; they refund the balance in cash, minus a 500 won fee, and the price of the card itself is not refunded.¹¹ Balances over 50,000 won can only be refunded at Tmoney Town near Seoul Station exit 10.¹²

The easier plan is to arrive at the airport with almost nothing left. Top up in small amounts in your last days, then spend the rest on a coffee or a snack at a store that takes T-money.

Q. Can I get a refund on a Climate Card pass? Only before the pass period ends, after a 500 won fee and what you have already ridden; without a Korean account, the refund means a trip to Tmoney headquarters.¹³

How do I pay a clinic deposit or a pharmacy bill in Korea?

By card, in most cases, but ask the clinic in writing before you travel: which cards it accepts, whether the deposit can be paid from abroad, and whether VAT is already inside the won price. Our guide to foreigner pricing at Korean clinics covers quotes and deposits, and our cost guide explains why foreign visitors can no longer claim VAT back on cosmetic procedures; the refund covered treatment up to the end of 2025.

Practical points for the money side:

Q. Can I pay a clinic with a foreign card? Usually, but confirm the network and any limit in advance. A refused card at the front desk is a stressful way to start a procedure day.