If you only sort out one practical thing on arrival in Korea, make it a T-money card. This rechargeable transit card works on subways and buses in Seoul and most cities, pays for taxis, and even works at convenience store tills. Here is the full loop: buy, charge, use, refund.
Where to buy one
Any convenience store — GS25, CU, 7-Eleven, emart24 — sells T-money cards at the counter, and subway station machines sell them too. The card itself costs a few thousand won, and character or design editions cost a little more. Ask for “T-money” and you will be understood everywhere.
Charging: cash is the catch
Top-ups at convenience stores and station machines are generally cash only for foreign visitors — this surprises many travelers. Keep some won on hand and charge in units of 10,000 won. A day of heavy sightseeing in Seoul usually costs well under 10,000 won in transit, so 30,000 won covers several days for most people.
Why it beats single tickets
- Transfer discounts: tap out of the subway and onto a bus within the transfer window and the second ride is discounted or free — always tap when leaving buses too.
- No queueing: skip the single-journey ticket machines and their deposit-refund step entirely.
- Taxis and shops: most taxis accept T-money, and convenience stores take it for small purchases.
Before you fly home
Leftover balance under 20,000 won can be refunded at convenience stores for a small service fee — just hand over the card and ask for a refund. Larger balances need a T-money service desk, so it is easier to simply run the balance down with a last convenience store snack run. Keeping the card as a souvenir works too: the balance stays valid for your next trip.
One card, one cash top-up, and every subway gate in the country opens with a tap. It is the cheapest upgrade your Korea trip will get.
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