Korea runs on cards more than almost anywhere, and your foreign card works at most of it: hotels, restaurants, chains, taxis, department stores. The failures cluster in specific places: self-order kiosks, some small restaurants, market stalls and in-app payments often reject foreign cards. The fixes are ₩100,000-200,000 of cash for a week of markets and street food, plus optionally a WOWPASS (a machine-issued prepaid card that behaves like local plastic). Exchange money at WOWPASS machines or withdraw with a low-fee card at bank ATMs; skip airport counters. Tipping: doesn’t exist.
Korea is further along the cashless curve than Japan or Taiwan, which lulls travelers into thinking one Visa covers everything. It covers 90%. This page is about the stubborn 10% and the cheapest way to hold won.
Where foreign cards fail, specifically
The pattern behind most failures: Korea’s domestic card rails and verification systems sometimes don’t recognize foreign cards even when a Visa or Mastercard logo is displayed. The predictable trouble spots:
- Self-order kiosks at fast food, cafes and food courts, the single most common failure, including at places whose human register would take your card fine. Order at the counter when one exists.
- Small restaurants and old-school shops, a shrinking but real set.
- Market stalls and street food: cash country, full stop (Gwangjang’s famous aunties take won, not wishes).
- Apps: Kakao T’s in-app payment chokes on many foreign cards (the workaround is its pay-in-car option), and local wallet apps mostly require Korean credentials.
Contactless at the subway gate is its own case: not yet, 2027, as covered in the transit cards guide.
Getting won, ranked by cost
WOWPASS machines (airports, major stations) take 16 foreign currencies and load a spendable prepaid card at near-mid-market rates — in practice the best rate most travelers can access, and the card then works where foreign plastic fails. Bank ATMs with a Wise/Revolut-style card come second: “global ATM” machines at banks (not the convenience-store boxes, whose fees run higher) with fees your card may or may not eat. Airport exchange counters and dynamic currency conversion (“pay in your home currency?” — always decline) are where the spread lives; use the former only for day-one pocket money.
How much cash: ₩100,000-200,000 per person per week covers the market-and-street-food layer of a normal trip, because everything bigger takes cards. Breaking large notes is painless; convenience stores change ₩50,000s without drama.
The non-rules
No tipping, anywhere: restaurants, taxis, hotels, guides. The listed price is the price (upscale restaurants fold any service charge into the bill explicitly). Haggling exists only in traditional markets and even there it’s gentle. And prices are honest by default; the tourist-overcharge economy of some destinations barely exists here, which is one of Korea’s quiet luxuries.
A tax refund layer rides on shopping purchases over ₩15,000 — worth understanding before a skincare haul, and covered in its own guide.
FAQ
Can I use my credit card everywhere in Korea?
At most staffed registers, yes. Kiosks, small eateries, market stalls and some apps reject foreign cards often enough that carrying ₩100,000-200,000 a week in cash, or a WOWPASS, saves real friction.
How much cash should I bring to Korea?
Arrive with little or none and make won in-country: a WOWPASS-machine load or an ATM withdrawal on a low-fee card beats home-bank exchange and demolishes airport counters. ₩100,000-200,000 a week in walking-around cash is plenty.
Is WOWPASS better than using ATMs?
For most travelers, slightly: near-mid-market conversion, no per-payment fees, and it works at kiosks that reject foreign cards. ATM-plus-Wise ties it on cost when your card eats ATM fees. Plenty of travelers run both.
Do you tip in Korea?
No. Not restaurants, not taxis, not hotels. Attempting it mostly produces polite confusion and chased-down change.
Keep planning
- Getting AroundT-money vs Climate Card vs WOWPASS: Which Card Does Your Korea Trip Need?
Korea's three travel cards decoded — T-money for everyone, the Climate Card's ₩5,000-20,000 tourist passes for Seoul-heavy trips, and WOWPASS as the foreign-card workaround. Checked October 2026.
- Trip PlanningKorea in 7 Days: Seoul and Busan, and Why You Should Skip Jeju This Time
A first-timer's week in Korea — four days in Seoul, the KTX south, two-plus days in Busan, and the reasoning for leaving Jeju to a second trip. Checked October 2026.
- MoneyKorea's Tax Refund: ₩15,000 Minimum, Instant In-Store, Few Excuses
Korea's tourist tax refund — the ₩15,000 minimum, instant in-store refunds up to ₩1,000,000 per receipt, the airport kiosk flow, and the medical-tourism refund that ended January 2026.
- PracticalThe Apps Korea Actually Runs On (Google Maps Still Isn't One)
Korea's app stack for travelers — why Google Maps still can't navigate here, Naver Map as the fix, the Kakao T foreign-card problem and its workarounds, Papago and the rest. Checked October 2026.
- eSIM & InternetThe Best eSIM for Korea (and When You Want a Korean Number)
Korea eSIMs compared — Airalo and Ubigi data plans from $14-35, the carrier tourist eSIMs that include a Korean phone number, and why that number occasionally matters. Checked October 2026.
- Getting AroundHow to Book KTX Tickets (the Window Just Doubled to 60 Days)
Booking Korea's KTX as a foreigner — the new 60-day window that started October 1, 2026, the Korail+ app merger, Seoul-Busan prices, SRT vs KTX, and when the Korail Pass pays.
Prices, schedules and closures change. If you spot something stale, email us and we’ll check it.