How to Use T-Money, the Seoul Subway, KTX Trains, and Express Buses
From tapping a T-money card on a Seoul city bus to navigating the Express Bus Terminal for a KTX ride, here is how South Korea's transport actually works.
How to Use T-Money, the Seoul Subway, KTX Trains, and Express Buses
A T-money card unlocks every public transport step in South Korea, from a Seoul city bus to a KTX bullet train to an express bus terminal departure board. Buy it for 2,500 won at any GS25, CU or 7-Eleven convenience store. Hand cash to the clerk and say "T-money card, please" (or just point at the display). The card is a thin plastic rectangle with a beeping chip inside. It is not a ticket for a specific trip. It is a stored-value card you tap, and the 2,500 won purchase fee is non-refundable.
Load money onto the card at the same convenience store register, a subway vending machine with a T-money logo, or an Incheon Airport convenience store before you exit the arrivals hall. The minimum recharge varies by machine. Plan to load 10,000 won if you are staying one day in Seoul. You do not need a smartphone app. You do not need to register it. Just tap and go.
Tapping the Card on Seoul Subways and Buses
Seoul Subway Entry And Exit
At any Seoul subway stop, hold the card flat against the circular reader on the fare gate. The turnstile unlocks with a beep and a green light. Tap the same card on the exit gate when you leave. Forget this, and the system charges the maximum possible fare for that line. The gate will refuse the card on your next trip until you resolve the overcharge at an attendant booth.
Seoul City Bus Boarding
On a Seoul city bus, enter through the front door and tap the card on the reader mounted next to the driver. A beep confirms the fare is deducted. Exit through the rear door and tap the second reader beside it. This second tap earns a transfer discount. Without it, the system treats your ride as a single journey with no free transfer window.
The Transfer Discount Window
Tap within 30 minutes of alighting and the next ride is free. This applies between bus and subway, bus and bus, or subway and bus. The window extends to 60 minutes between 7 PM and 9 PM. You get up to four free transfers per trip chain. The clock starts from the alighting tap, not from boarding. Tap out of a subway at 10:00 and board a bus at 10:29, the bus ride costs zero. Board at 10:31 and you pay full fare again.
Connecting to KTX Trains with a T-Money Card
KTX Tickets Are Separate From T-Money
Your T-money card does not buy a KTX seat. You need a separate KTX ticket for high-speed rail. Buy KTX tickets online via the Korail website, at a ticket window, or a kiosk. The full fare Seoul to Busan in standard class is 59,800 won (2026, Korail pricing). The journey takes 2 hours 15 minutes to 2 hours 45 minutes. That is about two hours faster than the express bus on the same route, which is why you pay the premium.
When A KORAIL Pass Pays Off
If you plan three or more long KTX trips, buy a KORAIL pass. Foreign visitors on short-term visas qualify. A 2-day flexible pass costs 121,000 won (2026, Korail). A Seoul-Busan round trip in standard class costs 119,600 won. So the pass breaks even with that single round trip plus one short extra ride. Purchase it online before you travel through the Korail website or a designated travel agency. You cannot buy the pass at any terminal. Arrive 10 minutes before departure to pick up the ticket from a kiosk using the booking reference.
Using T-Money To Reach The KTX Station
Use your T-money card to reach Seoul Station or the other main KTX departure points. Take any Seoul subway line that connects to Seoul Station, tap out, walk to the KTX departure concourse, and present your printed or digital KTX ticket at the gate. The two systems are physically separate inside the building but connected by a walkway. Do not tap your T-money card on the KTX gate. It does nothing.
| Mode | Cost Per Adult (2026) | Travel Time | Best For |
|---|---|---|---|
| AREX Express Train | 9,500 won | 43 minutes | Solo travellers who value speed |
| AREX All-Stop Train | 4,150 won | 58 minutes | Budget travellers; cheapest option for 2 people at 8,300 won total |
| Airport Limousine Bus | 17,000-18,000 won | 60-90 minutes (traffic dependent) | Travellers with heavy luggage, no subway transfers |
Reading the Express Bus Terminal and Booking Intercity Buses
Express Bus Vs Intercity Bus
Express buses (고속버스) run direct between major cities on expressways. They have assigned seating with premium and standard classes. Intercity buses (시외버스) stop at more towns along the way and may use local roads. Fares for either type range from 10,000 to 40,000 won (2026, Ministry of Land, Infrastructure and Transport oversight) depending on distance and class.
How The Departure Board Works
At Seoul Express Bus Terminal (also called Gangnam Terminal), the main departure board is a large electronic screen mounted above the ticket booths. It lists destinations in Korean hangul and English. Each row shows the destination name, the gate number, the departure time, the bus company, and ticket availability. The gate number is critical. Walk to that numbered gate, wait until the bus arrives, and hand your ticket to the driver. There is no boarding announcement in English for every bus. Watch the screen for your gate number and check the time.
Booking In Advance
Book online at Kobus (express buses) or Bustago (intercity buses). Foreign credit card acceptance varies by platform. Kobus accepts most international cards. Bustago is more unpredictable. If the online system rejects your card, buy the ticket at the terminal kiosk, which accepts cash and Korean cards. Arrive 15 minutes before departure for a kiosk purchase. For popular routes like Seoul to Busan on a Friday evening, the bus sells out. The failure case: if every bus shows sold out, check the KTX timetable from Seoul Station as a fallback.
Common Questions
Where can I buy a T-money card at Incheon Airport?
Buy a T-money card at any convenience store inside the arrivals hall: GS25, CU or 7-Eleven. The card costs 2,500 won non-refundable. Load cash at the same register.
What happens if I tap out of a subway station but the gate does not open?
Check your T-money balance on the reader. If the balance is too low, the gate rejects the card. Go to the attendant booth, add cash to the card, and tap out again. If the card itself is defective, the attendant issues a paper exit ticket.
Can I use T-money on a KTX train?
No. T-money only works on Seoul subway, Seoul buses, Incheon subway, AREX (non-express), taxis and convenience store payments. KTX requires a separate ticket purchased online or at the terminal.
How late does the Seoul subway run?
Last trains depart termini between 23:30 and 00:30 depending on line and stop. Line 1 last trains leave Seoul Station around 00:00 to 00:30. Check the Seoul Metro timetable for your specific stop and line. After midnight, take a taxi or a late-night bus.
What do I do if I miss the last KTX from Seoul to Busan?
Check the bus terminal for a late-night service. Some operators run until 23:00 or later. If buses are sold out, book a room near Seoul Station and take the first KTX at around 05:30 the next morning. Do not wait at the terminal overnight in winter; the waiting room is unheated.
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