Last verified: 2026-08-27 06:42 KST
The subway map makes it look simple. Lines run well past the city limits — to Suwon, to Incheon, up the Gyeongchun line toward Chuncheon — and the same card taps you through. What the map does not show is that the card in your pocket may stop earning you anything the moment you cross out of Seoul, and that the boundary is different for each product.
This page is about where those boundaries actually fall, taken from Seoul Metropolitan Government’s own published rules.
The card that works everywhere and gives you nothing extra
A plain T-money card is accepted on subways and buses nationwide, in most taxis, and as electronic money in convenience stores. It asks nothing of you — no ID, no registration, no residency — and it gives nothing back beyond the transfer discount.
That combination makes it the right answer for a day trip regardless of where you live or what your status is. If you leave Seoul a few times a month, stop reading: T-money is your card. Its costs, including the non-refundable card price and the 500 KRW refund fee, are in our T-money guide.
The subsidy schemes have hard geographic edges
From 1 September 2026, Seoul retires the Climate Card and replaces it with the Climate Companion Pass — the national Modu Card scheme with Seoul benefits layered on top. The edge is not where you travel. It is where you live.
Seoul states that the Climate Companion Pass refund benefit is for Seoul residents. Residents of Gimpo, Goyang, Gwacheon, Guri, Seongnam, Hanam and Namyangju are outside it and use the Gyeonggi equivalent, The Gyeonggi Pass. Checked 2026-08-27.
This is a change from the Climate Card, which some of those areas could use. If you live just outside Seoul and commute in, the Seoul scheme is not yours no matter how much of your travel happens inside the city.
The short-term pass, and where it now stops
The Climate Card short-term passes — 1, 2, 3, 5 and 7 days — continue to operate after the September transition, because they cannot be folded into Modu Card. But their coverage narrowed at the same time.
Per Seoul: the short-term pass covers the Seoul area, plus alighting at Incheon International Airport. The outer areas previously included — Gimpo, Goyang, Gwacheon, Guri, Seongnam, Hanam and Namyangju — are now excluded from the short-term pass coverage. Checked 2026-08-27.
So a visitor holding a 3-day pass who takes the subway to Suwon or out toward Namyangju is outside it. The airport exception is the useful part: it covers alighting at Incheon, not boarding there for an arrival journey.
The exception that catches people at a bus door
Worth learning before it strands you with luggage. Airport Limousine Co. states on its own notice that on its airport buses, passengers pay the driver in cash or with a transit card — T-money or a postpaid transit card — and that the Climate Card and the Discover Seoul Pass are not accepted.
A credit card cannot be processed on board at all: payment must be completed on arrival at Incheon Airport, and the operator states a driver may temporarily hold a passenger’s credit card to prevent unpaid fares.
If a subsidised pass is your everyday card, carry cash or a plain T-money on airport days. See our Incheon Airport to Seoul guide.
Registration decides whether the subsidy exists
The schemes do not pay you for holding a card. Seoul states that you must register the card and complete your personal details on the K-Pass site to receive any refund, and that a prepaid card additionally needs its card number and a refund bank account registered with its issuer — T-money or Ezl.
The refund account is a Korean bank account in your name, which puts the whole subsidy behind identity verification and a bank account. There is no retroactive claim for an unregistered card. Benefits calculate on spending through the end of the calendar month, so mid-month registration counts for that month — but only from the point you register.
The refund and flat-cap figures, the youth bracket widening to age 39, and the temporary fuel-price discount that ended on 30 September 2026 are in our transit passes guide.
Which card for which Saturday
| Your situation | The card that fits |
|---|---|
| Occasional day trips, any destination | Plain T-money. No registration, no boundary problem. |
| Seoul resident, daily commute | Modu Card / Climate Companion Pass, registered on the K-Pass site. |
| Live in Gimpo, Goyang, Seongnam, Hanam, Guri, Gwacheon or Namyangju | The Gyeonggi Pass. The Seoul scheme excludes you. |
| Visiting for under a week, staying in Seoul | Climate Card short-term pass — Seoul area plus Incheon Airport alighting. |
| Visiting and taking day trips outside Seoul | Plain T-money. The short-term pass no longer covers those areas. |
| Airport bus on either end | Cash or plain T-money. Subsidised passes are not accepted. |
How far the network actually reaches
The reason this matters at all is that the subway genuinely does leave the city, and further than newcomers expect. Lines run south into Gyeonggi, west to Incheon, and north-east up the Gyeongchun corridor. A fortress wall, a Chinatown, a river island — all of them are a tap away without a car or a ticket counter.
Subsidy eligibility and journey coverage are different questions: a Seoul address controls Seoul-specific benefits; crossing the city boundary alone does not end national-scheme coverage.
Check both your registered-residence scheme and the transport services it covers. A short-term Climate Card has a different coverage boundary from the national refund scheme.
Getting home is the part that ruins days
The failure mode of a day trip out of Seoul is not the fare. It is the last train.
Services on the outer reaches of the network stop earlier than services inside the city, and a connection that exists at nine may not exist at eleven. Check the last departure from the station you will actually be at, for the line you will actually take, before you commit to dinner — not the last train from a central station.
The intercity rail alternative is a different system with its own tickets and its own passes, covered in our KORAIL pass guide.
What we could not verify
Fare structures at the boundaries of the capital-region integrated transfer system — where a distance-based supplement begins, and how transfers are counted across operators — are set by multiple operators and were not confirmable from a single published source at the time of writing. We are not publishing fare tables we could not check.
What we have published above are the coverage rules Seoul states directly: who the subsidy is for, which districts are excluded, and where the short-term pass stops.
Verification note. On September 24, 2026 an AI-assisted check compared the Climate Card short-term passes of 1, 2, 3, 5 and 7 days and the youth bracket widening to age 39 against the Seoul Metropolitan Government, and confirmed the official sources linked in this guide still resolve to the same pages. I publish this guide under my own name and am responsible for what it says. Rules and fees in Korea change often; if you spot something out of date, email hello@90dayskorea.com and it will be re-checked and corrected.
Sources
- Seoul Metropolitan Government — Q&A on the Climate Companion Pass: eligibility by residence, excluded districts, short-term pass coverage, registration requirement (Korean)
- Seoul Metropolitan Government — youth benefit extended to age 39 (Korean)
- K-Pass — official card registration site (Korean)
- Airport Limousine Co. — payment notice: Climate Card and Discover Seoul Pass not accepted (Korean)
- Seoul Metropolitan Government — English portal
Last verified: 2026-08-27 06:42 KST. The Seoul scheme is mid-transition and coverage rules changed on 1 September 2026. Note that korea-pass.kr restricts access to connections from inside Korea. The linked sources are the authority.