On a Seoul city bus, use the same transit card when boarding and leaving. The exit tap records the end of that leg and matters for the next transfer. Paying cash or switching cards breaks the simple linked-trip plan.
The rules to remember at the rear door
VISITKOREA states that eligible Seoul transfers must begin within 30 minutes during 07:00–21:00, or 60 minutes during 21:00–07:00. The chain allows up to four transfers, or five rides. Reboarding a bus with the same route number does not receive the transfer benefit. Tap out before leaving, even when you think it is your last ride.
“Free transfer” means relief from another basic fare under the rules. It does not mean every combined journey costs the same: distance and a higher-fare service can add charges. These Seoul rules should not be carried over to another city’s buses or to airport and intercity coaches.
Before the bus arrives
- Search the exact destination in a local map app and choose a public-transport route.
- Match the stop location and direction, not just its English name. Stops across the road can share a name.
- Check the next stop in the route sequence. It is a useful cross-check when the front destination sign is unfamiliar.
- Have one transit card ready outside a wallet containing other contactless cards.
If you are uncertain, let a bus leave while you resolve the route. Boarding first and trying to fix the direction later can turn a short trip into two separate fares. Keep your destination in Korean so the driver can recognize it without deciphering an English nickname.
Board, ride and leave
Board at the front and tap the reader. Check that the reader accepted the card; a sound alone may be an error. Move away from the entrance when it is safe. Follow the stop display and press the stop-request button before your stop. Keep hold of a rail while the vehicle moves, then tap the exit reader and leave through the designated door.
If a tap fails, do not keep alternating between a phone and plastic card. Show the card to the driver and explain the failed reading. For a bus-to-subway itinerary, giving each traveler a separate card avoids the complications of group boarding and individual subway gates.
Four examples of what happens next
| Illustrative situation | What to expect |
|---|---|
| You tap off at 14:00 and board a different eligible route at 14:20 | The time requirement is met; the total journey can still attract distance or fare differences. |
| You stop for lunch and board again at 14:45 | The ordinary daytime window has expired. Budget for a new journey. |
| You exit at 22:10 and board an eligible connection at 22:55 | This fits the published nighttime window. |
| You board the same bus number in the opposite direction a few minutes later | Do not expect the transfer discount, even though little time has passed. |
These are rule examples, not actual charged-trip tests. Avoid planning a connection at the exact cutoff: walking between stops and waiting for a bus take time.
When an extra charge appears
First ask whether it is an additional distance charge or a new basic fare. Then check the exit tap, elapsed time, route number and whether the same card was used. Keep the route number, boarding and exit stops, approximate times and any receipt or app record. A clear record helps staff explain the fare; a second blind tap may only add confusion.
If you missed the exit tap, tell staff what happened when seeking help. Do not assume a later tap will reconstruct the trip or promise yourself an automatic refund. For a journey you must make on time, restore a usable balance first and investigate the disputed fare afterward.
Sources and verification
Official information checked October 22, 2026. Prices and policies can change; confirm your date and selected service before paying. This is a desk-researched guide, not a report of a personal visit or device test.
Related: T-money setup · Map apps · Subway travel
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