T-money Card Guide: How to Buy, Top Up and Use It in Seoul

Short answer: a T-money card is a rechargeable transport card you can buy at almost any Korean convenience store or at subway station machines. You load it with cash, tap it on the reader when you enter and leave the subway (and when you get on and off a bus), and the fare is deducted automatically, with transfer discounts. For most first-time visitors it is the simplest way to get around Seoul.

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What is T-money, exactly?

T-money is Korea's most common prepaid transport card. It looks like a plain plastic card (or a cute character keyring), and it works on the Seoul subway, city buses, many intercity and airport buses, and in most taxis. It also works in other big cities such as Busan, so you do not need a new card every time you change cities. Many convenience stores also accept it as a payment method for small purchases.

The card has no name on it and no registration is needed. Whoever holds it can use the balance, so treat it a little like cash.

Where to buy a T-money card

Convenience stores

The easiest place is any CU, GS25, 7-Eleven or emart24. Just say "T-money card, please" or show the word on your phone. Staff will hand you a card; many stores also sell character designs (K-pop, cartoon characters and so on) that cost a little more. You usually pay for the card itself first, and it comes with zero balance, so ask them to top it up at the same time.

Subway station machines

Many subway stations have card vending machines with an English menu. These usually accept cash only. If you arrive at Incheon Airport, the convenience stores in the arrivals hall and the airport railway station are a good first stop.

Card price

The card costs a few thousand won and that part is not refundable. Prices change and character cards vary, so expect to pay a small one-off fee and check the price at the counter.

How to top up (recharge) your card

Top-ups are mainly done with cash in Korean won:

At a convenience store: hand over the card and the cash and say how much you want to add ("ten thousand won, please" = man won).
At a subway top-up machine: place the card on the tray, choose English, select "Top up / Recharge", pick an amount and insert banknotes. Keep the card on the tray until the screen says it is finished.

Foreign credit cards are generally not accepted for top-ups at machines or stores. Some newer options for foreign cards have appeared, but they are not available everywhere, so it is safest to carry some cash for top-ups. Check the official T-money site for the latest options before your trip.

How much to load? It depends on how much you move around. A sensible approach is to add a moderate amount at first, see how fast it goes, and top up again. You cannot go negative on the subway: if your balance is too low to tap out, use the fare adjustment machine near the gates.

How to use T-money on the Seoul subway

Touch the card on the reader at the gate when you enter. The screen shows your remaining balance.
Ride to your station. Use Naver Map or Kakao Map for routes, since they are more reliable in Korea than many international map apps.
Touch the card again at the exit gate. The final fare depends on distance, so always tap out.

Each traveller needs their own card on the subway, since one card lets one person through the gate.

How to use T-money on buses

Board through the front door and tap the card on the reader next to the driver. When you get off (usually through the back door), tap again on the reader by the exit. Many visitors forget this second tap. Tapping out matters because it is how the system calculates your transfer discount and any extra distance fare.

The bus driver will not sell T-money cards, and many city buses no longer take cash, so load your card before you board.

Transfer discounts: the hidden bonus

Seoul uses an integrated fare system. When you switch between subway and bus, or bus to bus, within a set time after tapping out (usually around 30 minutes), you pay a reduced fare, or nothing extra, for the next leg instead of a full new fare. This only works if you tap out properly each time. It is one of the main reasons a transport card beats paying with single-journey tickets.

Other places you can use T-money

Taxis: most taxis have a card reader. Tell the driver "T-money" and tap when you pay.
Airport railroad (AREX): the all-stop commuter train accepts T-money. The non-stop Express train to Seoul Station uses a separate ticket. See our Incheon Airport to Hongdae guide for how the options compare. If you want the Express, you can also book an AREX Express ticket on KKday in advance.
Convenience stores and some vending machines: handy for small purchases.
Other cities: the card works on public transport in most major Korean cities.

Getting your leftover balance back

At the end of your trip, smaller balances (up to about 20,000 won) can usually be refunded at major convenience store chains for a small fee. Larger balances are handled at T-money customer service points, found at some major stations. The price of the card itself is not refunded. Many visitors simply keep the card for their next trip, since the balance does not disappear.

T-money vs Climate Card vs WOWPASS

You will probably hear about two alternatives:

Climate Card short-term passes: Seoul sells unlimited-ride tourist passes for a set number of days, valid on Seoul subway and buses. They can save money if you ride a lot, but they only cover transport in the Seoul area and do not work in places like Busan or Jeju. Check the official Seoul information for current prices and which lines are included.
WOWPASS: a prepaid card for foreigners that combines payment and a transport function, and can be loaded with foreign currency at kiosks. It is popular with people who want to use less cash.

Plain T-money is still the most flexible option: it works almost everywhere, there is nothing to activate, and it is easy to find.

LUMI from POPORO CITY says: "Tap in, tap out, and the city opens up. I keep a spare ₩10,000 note in my phone case just for top-ups."

Quick tips

Buy your card and top it up with cash at a convenience store as soon as you arrive.
Always tap out on buses as well as the subway, or you lose transfer discounts.
Carry some cash in won for top-ups; do not count on using a foreign card.
Each person needs their own card.
Keep the card away from other contactless cards in your wallet to avoid reader errors.
Need data for map apps? Read our eSIM vs pocket WiFi vs SIM guide.

FAQ

Can I use one T-money card for two people?

On the subway, no: one tap lets one person through the gate, so each traveller needs their own card. Buying a second card is quick and inexpensive.

Can I top up T-money with a credit card?

Usually not at convenience stores or standard station machines, which work with cash. Some newer methods exist, but availability varies, so bring cash and check the official T-money site for current options.

Does T-money work outside Seoul?

Yes. It works on public transport in most major cities, including Busan, and in many taxis nationwide.

What happens if I forget to tap out on the bus?

You will usually miss the transfer discount on your next ride and may be charged extra. It is not a disaster, but get into the habit of tapping on the way out.

Does the balance expire?

Remaining balance generally stays on the card, so you can reuse it on a future trip. Check the official T-money site if you plan to keep it for many years.