Every day on my commute I transfer between the bus and the subway, going to work and coming home again. For Seoul commuters it's so normal that nobody even mentions it. But if you're visiting, a Seoul bus stop can look like a test you didn't study for. The route maps are mostly in Korean, the numbers run to four digits, and three buses pull in at once while everyone around you already seems to know which one is theirs.
Good news, though. Once you've got one transit card in your pocket, most of that stops mattering.
Quick facts
- Fares with a card: subway 1,550 won, city bus 1,500 won
- Transfer window: 30 minutes after tapping off (1 hour, 9 p.m. to 7 a.m.)
- Tap on and off, or the transfer chain breaks
- Overseas contactless cards cannot tap on buses yet, planned around 2027
- Tmoney Travel Card for foreigners: 4,000 won
One card, one fare, the whole city
Fares first, because they're cheap. A subway ride costs 1,550 won with a card (it went up from 1,400 on June 28, 2025). Blue and green city buses are 1,500 won with a card, and that price has held since August 12, 2023.
The clever part is how the rides hook together. Back in July 2004 Seoul tied its buses and subway into one fare system. Then it kept going: Gyeonggi buses joined in 2007, the big wide-area buses in 2008, Incheon's buses in 2009. So the card that gets you across town also gets you out to the suburbs and over city lines, and nobody asks you which company runs what.
The transfer system I'd happily brag about
Compared with what I've seen on business trips abroad, this linked bus and subway payment is something Koreans can be proud of. I mean that.
The Line 5 platform at Dongdaemun History & Culture Park on a weekday morning. That black Transfer sign with the 2 and 4 circles is the one to follow when you change lines. Photo: A Korean's Take
Here's how it works. On a bus you tap your card when you get on, and you tap again when you get off. (Yes, getting off too. Hold that thought.) If you board the next bus or walk through a subway gate within 30 minutes of that tap-off, it counts as a transfer. Late at night, from 9 p.m. to 7 a.m., you get a full hour. You can chain up to four transfers, so five rides, and the whole thing gets priced as one trip by total distance. The base fare covers the first 10 km. After that it's 100 won for every extra 5 km.
When the rides have different base fares you just pay the higher one. Bus at 1,500 and then subway at 1,550? Your transfer costs 50 won. Fifty!
Two catches. Getting back on the same route doesn't count as a transfer, so hopping off for a coffee and catching the next bus with the same number for free won't work (somebody thought of that years ago). And if you forget to tap off, the chain breaks and your next ride charges a fresh fare. That little beep at the back door is the whole trick. Early birds get a treat too: start your first ride before 6:30 a.m. and the card fare is 20 percent off.
Why you can't just pay cash
This is where visitors get stuck. Seoul has been pulling the cash boxes out of its buses for a while now. A pilot started on eight routes in October 2021. By March 2023 a quarter of the fleet had gone cashless (108 routes, 1,876 buses), and local reporting in early 2026 counted about 180 of the city's 394 routes. On those buses there's simply nowhere to put a bill. On the ones that still take cash, you lose the transfer discount, so you'd end up paying twice anyway.
Your credit card from home won't work at the reader either, at least not yet. Seoul plans to let overseas contactless cards tap on city buses around 2027. Until then you need a Korean transit card, and there are a few kinds.
The plain T-money card is the default. Convenience stores sell them (GS25, CU, 7-Eleven, there's one on basically every corner) and so do the machines in subway stations, and you top it up with cash. T-money also makes a Tmoney Travel Card for foreigners at 4,000 won. The old Korea Tour Card isn't sold anymore, in case an older guide sends you hunting for it. WOWPASS is another card aimed at visitors, a prepaid card with T-money built in, and you'll need your passport to get one.
Riding a lot inside Seoul? Look at the short-term Climate Card. It's unlimited rides for 1 day (5,000 won), 2 days (8,000), 3 days (10,000), 5 days (15,000) or 7 days (20,000), plus 3,000 won for the plastic card itself. It covers the Seoul subway and Seoul-licensed buses, night buses included. What it doesn't cover: the Shinbundang Line, GTX, the red wide-area buses and buses licensed by other cities, so a day trip out of town still needs a regular card. Since March 17, 2026 the newer station kiosks take overseas cards for it (with a 3.7 percent fee).
Only taking the subway once or twice? A single-journey ticket from the station machine works for the subway only, and there's a 500-won deposit you get back from the refund machine when you're done. Kind of a hassle, honestly.
Bus colors, and the stop in the middle of the road
Seoul buses are color-coded, and it helps more than you'd think. Blue ones run long trunk routes across the city. Green ones are branch buses that link neighborhoods to subway stations. Yellow buses loop around downtown, and the red ones are express runs out to Gyeonggi. After midnight, look for numbers that start with N.
Then there's the thing that really throws people. On a lot of big roads the bus stop isn't on the sidewalk at all. Since the 2004 bus reform Seoul has run bus-only lanes down the center of major roads, so the stop is a little island in the middle of traffic and you walk out to it on a crosswalk. Make sure you're on the island for your direction. Standing on the wrong one is a very efficient way to wave goodbye to your bus.
Once you're on, it's easy. Front door in, tap. Press the stop bell before your stop, don't make the driver guess. Tap the reader by the back door and get off at the back. Naver Map and Kakao Map both show live arrival times, and most stops have a screen counting down too.
One local quirk. If two transit cards sit in the same wallet, the reader gets confused and its little voice asks you to tap only one card. Pull the right card out, or keep the other one in a different pocket.
Before your first tap
My advice for day one is boring, but it works. Pick up a card at the airport convenience store or any station and load 10,000 or 20,000 won. If your whole trip stays inside Seoul, the short-term pass might be the better deal. Tap off. Every time. Even on a two-stop ride where it feels silly. And trust the map app on which side of the road (or which island) you need, because the bus number alone won't tell you.
Not in a rush? Take a bus at least once. Yes, the subway's faster for long hops. But from a bus window you get the real neighborhoods going by, markets and apartment blocks and plain old corners nobody puts in a guidebook.
Official info
Dates, prices and hours change, so check before you go (details as of 2026-10-07).
- Seoul Metropolitan Government: how to use Seoul buses and subway
- Seoul Metropolitan Government: Climate Card and short-term passes
- VisitKorea: transportation cards for travelers
More from this blog
- Seoul Royal Palaces: Gyeongbokgung vs Changdeokgung vs Deoksugung
- Suwon Hwaseong Fortress Guide: an easy day trip from Seoul
So which transit system abroad was the easiest for you, and which one left you totally lost?
Top photo: a blue trunk bus on route 400 rolling through downtown Seoul on a sunny day. Photo: Sean Lee / Unsplash
More Seoul planning
If you are deciding how to move around the city, the Seoul taxi guide covers the moments when transit is not the easy answer. For two easy stops to build into a subway-and-bus day, see the Seoul royal palaces guide and the Han River picnic guide.
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