South Korea runs on cards. Tap your Visa at a convenience store at 3 a.m., pay for street tteokbokki with Samsung Pay, split a norebang bill on a foreign Mastercard — it mostly just works. But “mostly” is doing a lot of work in that sentence. A handful of real-world friction points can turn a smooth trip into an awkward dance at the register. Here is what actually matters.
Cards: What Works and What Doesn’t
Visa and Mastercard are accepted virtually everywhere in Seoul, Busan, and other cities — department stores, mid-range restaurants, hotels, subway ticket machines, and most convenience stores (GS25, CU, 7-Eleven, Emart24). American Express has decent coverage at larger hotels and duty-free shops but gets declined at plenty of smaller merchants. Discover is largely useless outside a handful of tourist-facing counters.
The practical issue with foreign cards is the foreign transaction fee your home bank charges — typically 1–3% per purchase — plus the occasional dynamic currency conversion (DCC) trap. When a terminal asks whether you want to pay in KRW or your home currency, always choose KRW. The DCC rate the merchant offers is almost always worse than your bank’s interbank rate.
Contactless works well in Korea. Most modern terminals accept NFC, so Apple Pay, Google Pay, and Samsung Pay all function at checkout. For subway and bus travel, the T-money card (more on this below) is the smoothest option, but you can now tap a foreign contactless card directly on Seoul Metro gates — though transfers between bus and subway won’t be discounted the way they are with T-money.
- Best cards to bring: Visa or Mastercard with no foreign transaction fees (e.g., Charles Schwab debit, Wise, Revolut)
- ATM networks: Global ATMs at every GS25 convenience store and most Woori, Shinhan, and KEB Hana bank branches accept foreign cards 24/7
- PIN requirement: Some Korean terminals ask for a PIN on credit cards — make sure you have one set before you travel
- Notify your bank: Block alerts for unusual foreign transactions are common — a quick pre-trip notice prevents mid-dinner card freezes
Cash: How Much to Carry and Where to Get It
You need less cash in Korea than you might expect, but you do need some. Street food stalls, smaller jjimjilbang (sauna) lockers, some temple entrance fees, and traditional markets like Gwangjang or Dongdaemun still run cash-only or prefer it. A daily budget of ₩50,000–₩80,000 (roughly $35–55 USD) in your wallet covers incidentals without leaving you over-exposed.
The best exchange rates in Korea are consistently found at the Myeongdong money changers in Seoul — a cluster of competing exchange booths near the main shopping street that beat bank rates by 2–5% on popular currencies (USD, EUR, JPY, CNY). Incheon Airport rates are convenient but noticeably worse; exchange just enough at the airport to cover your taxi or bus into the city, then swap the rest in Myeongdong or at your destination city’s equivalent — see our guide to exchanging money safely in Korea for the full breakdown of rates and scams to avoid.
Korean ATMs dispense 50,000-won notes (about $35) by default, which can be awkward for small purchases. If you need change, duck into a convenience store, buy a bottle of water for ₩1,200, and break the note. Convenience stores are everywhere and clerks are practiced at this — many also accept mobile wallets, so see our guide to convenience store payments in Korea for the full picture.
- Best ATMs for foreigners: GS25 convenience store ATMs (Global ATM label), KEB Hana Bank, and post office ATMs (Korea Post)
- Withdrawal limit: Most foreign-card ATMs cap at ₩700,000–₩1,000,000 per transaction
- Fee-free trick: Charles Schwab Bank (US) and Wise reimburse ATM fees worldwide — useful for longer trips
- Cash-preferred spots: Traditional markets, pojangmacha (street tents), small jjimjilbang, some Buddhist temple entry fees
T-money: The Transit Card That Does More Than Transit
Buy a T-money card at any convenience store for ₩4,000 (card fee) and load it with ₩20,000–₩30,000 to start — you can top it up with cash from any ATM withdrawal in Korea along the way. It covers all subway lines in Seoul, Busan, and most other cities, intercity buses, and even KTX trains in some cases. The discount for transferring between subway and bus within 30 minutes saves around ₩100–₩200 per connection — small individually, meaningful over a week of daily travel.
Beyond transit, T-money works as a payment card at GS25, CU, 7-Eleven, and Emart24 convenience stores, and at some vending machines and parking meters. Reload it at any convenience store register — just hand it over and say the amount you want to add. At trip’s end, remaining balance can be refunded at convenience stores for amounts under ₩20,000 (minus a ₩500 fee), or at subway station service offices for larger amounts.
The Kakao T-money app version works on Android phones via NFC if you want a digital alternative, though the physical card is more reliable across older transit gate hardware in smaller cities.
Practical Numbers to Know Before You Go
Korea’s currency comes in coins (₩10, ₩50, ₩100, ₩500) and notes (₩1,000, ₩5,000, ₩10,000, ₩50,000). The ₩50,000 note is orange-tan with the portrait of Shin Saimdang; the ₩10,000 note is blue with King Sejong. Counterfeit awareness is not a major traveler concern here, but knowing which note you’re handling speeds up transactions.
Reference prices that help you gauge whether your cash is stretching:
- Subway single ride (Seoul): ₩1,400–₩1,600 with T-money
- Convenience store kimbap: ₩1,500–₩2,000
- Cup of Americano at local cafe: ₩3,500–₩5,000
- Gwangjang Market bindaetteok (mung bean pancake): ₩5,000
- Budget guesthouse dorm bed per night: ₩20,000–₩35,000
- Mid-range restaurant lunch set: ₩9,000–₩15,000
The bottom line: bring a no-foreign-fee card as your primary payment tool, carry ₩50,000–₩100,000 in cash for street-level spending, and get a T-money card the moment you clear customs. That combination covers 95% of what you’ll encounter in Korea without paying unnecessary fees or hitting awkward cash-only walls.