Do You Need Cash in Korea? What US Travelers Actually Need to Carry

Short answer: no, you don’t need much cash in Korea — but you need some, and one piece of plastic matters more than your Visa.

The country that popularized tap-to-pay subway gates and blanket mobile coverage has also, per the Bank of Korea’s own numbers, quietly become one of the more cash-light societies a US traveler will visit. Cash accounted for just 15.9% of individual payment transactions in Korea in 2024, down from 21.6% as recently as 2021 — credit cards alone covered 46.2% of transactions, debit cards 16.4%, and mobile or prepaid cards 12.9%, according to the Bank of Korea’s 2024 Payment Instrument and Mobile Financial Service Usage Behavior Survey of 3,551 adults. For a US visitor used to tapping a card at Starbucks but still keeping $40 in a wallet for a food truck or a laundromat, Korea will feel familiar in the abstract and a little different in the specifics — right down to the card reader built into the fare box on every city bus.

Traditional Markets Crack Down on Cash-Only Stalls

Korea’s traditional markets — the covered alleys of stalls selling produce, street food, and secondhand goods that predate every mall in the country — have long been the exception to the country’s card-first habits. A vendor selling grilled fish or fresh perilla leaves might not have a card reader at all, and a ‘cash only, sorry’ wave has been part of the market experience for generations.

Analysis: that exception is under real pressure, even without a single named campaign to point to. The direction of travel is consistent with everything else in Korea’s payment landscape — as card and mobile payments have become the default virtually everywhere else, per the 2021-to-2024 shift above, a cash-only market stall reads increasingly like an outlier rather than a charming holdover. For a US visitor, the practical upshot is this: don’t assume a market stall takes cards, but don’t assume it doesn’t, either. The safe default of ‘markets mean cash’ is going stale faster than most guidebooks have caught up to.

Why the Bank of Korea Is Worried About Vanishing ATMs

The same survey that produced the headline cash-share number is also the reason the topic keeps coming up in Korean financial-policy circles: cash’s share of individual transactions fell from 21.6% in 2021 to 15.9% in 2024, a fast move for a payment habit that used to anchor daily life.

Analysis: physical cash infrastructure — ATMs, coin depots, armored-truck cash transport — is built and staffed for a certain volume of transactions. When that volume drops as quickly as Korea’s cash share has, the economics of maintaining a dense ATM network get harder to justify, especially outside dense urban cores. That’s not a claim that ATMs are disappearing overnight; it’s the underlying reason cash access and cash acceptance keep surfacing as a live policy question in Korea rather than a settled one. For a visiting American, the practical implication is simple: don’t count on finding an ATM around every corner the way you might in a US downtown, and don’t wait until you’re down to your last few won to look for one that actually works with a foreign card.

It’s Actually Illegal for Korean Merchants to Refuse Your Card

Here’s a piece of leverage most US visitors don’t know they have: in Korea, refusing a card payment isn’t just bad customer service — it’s against the law. Under Article 19 of Korea’s Specialized Credit Finance Business Act, a merchant that accepts credit cards cannot refuse a card transaction or treat a card-paying customer worse than a cash-paying one simply because they paid by card. Violators face up to one year in prison or a fine of up to 10 million won, roughly $7,200.

That’s a meaningfully stronger consumer protection than most US cardholders are used to. In the US, card minimums (a $10 threshold for card purchases, a small surcharge for using a credit card) are legal and common at small businesses. In Korea, once a business displays card logos and has signed up to accept cards at all, it legally cannot steer you toward cash or penalize your card use — a small café or convenience store is required to actually run your card, not just accept it in theory.

T-money: The One Card You Actually Need

If there’s one physical card worth carrying in Korea regardless of how you feel about cash, it’s T-money — the country’s rechargeable transit card. Per Korea Tourism Organization guidance, T-money is sold at convenience stores nationwide, including GS25, CU, and 7-Eleven, for 3,000 to 5,000 won, and it can be recharged up to 500,000 won per transaction at subway ticket machines. It’s accepted not just at subway and bus fare gates but by taxis and any store displaying the T-money logo.

Localization: think of it as Korea’s answer to New York’s MetroCard — except it also functions as a mini prepaid debit card at thousands of convenience stores and in many taxis, something the MetroCard was never built to do, and something its NYC successor, OMNY, still doesn’t do. A US visitor who picks up a T-money card on arrival and reloads it with cash or a card at any subway station has, in one small piece of plastic, covered transit fares, quick convenience-store purchases, and a fallback for the rare terminal that balks at a foreign Visa.

Where Cash Still Wins: Markets, Taxis, and Temples

Despite everything above, don’t leave your won at home. A handful of situations in Korea still favor cash outright: older taxi drivers who’d rather not run a card, small temple donation boxes, some rural guesthouses, and — as covered above — a meaningful minority of traditional-market stalls.

Temples are a special case worth flagging directly: donation boxes at temple entrances and offering boxes near altars are cash-only by design, because they were never built as payment terminals in the first place. A few thousand won in small bills covers this comfortably.

One thing cash won’t buy you in Korea, incidentally, is better service. Tipping isn’t expected at Korean restaurants, taxis, or hotels — the listed menu price or the metered fare is genuinely the full bill, and leaving extra cash on the table is about as likely to prompt a server to chase you down and hand it back as it is to read as generosity. It’s a reversal of the US default that catches a lot of first-time visitors off guard.

Getting Won: Global ATMs and Airport Exchange Counters

When you do need won, the fastest reliable path is a Global ATM. Independent travel guides covering foreign-card ATM access in Korea are consistent on this point: only machines explicitly marked ‘Global ATM’ or ‘Global Service’ reliably accept foreign-issued Visa, Mastercard, Cirrus, and Plus cards, and a large majority of Korea’s ATMs lack that labeling entirely. The same guides flag convenience-store chains — CU, GS25, 7-Eleven, and Emart24 — as some of the most consistently foreign-card-friendly ATM locations, since they’re everywhere and tend to run globally compatible machines.

Practical: think of a Korean Global ATM the way you’d think of a Bank of America or Chase branch ATM back home versus a random corner-store machine that charges a few dollars and might not even recognize your card — the labeling is the whole game. Check with your US bank before your trip about foreign transaction fees and out-of-network ATM charges, since Global ATMs in Korea still typically apply their own withdrawal fee on top of whatever your home bank charges. Airport arrival is usually the easiest moment to get your first won: both Incheon and Gimpo have currency exchange counters and ATMs in their arrivals halls, so there’s no need to arrive with a pocketful of dollars queued up for a street exchange that doesn’t really exist here anyway.