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Seoul bus says "jan-aek-i bu-jok-ham-ni-da"? Your T‑money is empty
- Tap on
- 잔액이 부족합니다 = balance too low, top up first
- Tap off
- 충전이 필요합니다 = ₩2,500 or less left
- Top up
- Korean won cash at convenience stores or subway machines
- No cash
- Climate Card short pass, 1–7 days, from ₩5,000
Two short lines from the bus card reader tell you when your T-money card is empty or nearly empty. Here's what they mean, where to top up with cash, why some buses won't take cash, and the Climate Card pass you can buy with a foreign card.
Gangnam Station bus stop at night · Photo: *Youngjin (CC BY-SA 4.0), via Wikimedia Commons
What the bus reader says
- TAP ON"Balance too low"
jan-aek-i bu-jok-ham-ni-da. Your card doesn't have enough for the fare. Step aside, top up, and tap again.
잔액이 부족합니다 - TAP OFF"Top-up needed"
chung-jeon-i pil-yo-ham-ni-da. You have ₩2,500 or less left, so top up before your next ride.
충전이 필요합니다
How to top up a plastic T-money card
- 1Get Korean won in cash
Cash is the surest way to top up a plastic T-money card. Foreign credit cards often don't work for this.
- 2Convenience store counter or subway machine
At a store, hand over the card and say the amount. At a station, use the card reload machine.
- 3Top up the night before
Our tip: add the next day's fares at a store near your hotel so you never get stuck at the bus door.
On the bus
- CASH-FREESome Seoul buses take no cash
Seoul has been expanding 'cash-free buses' (현금 없는 버스), so don't count on paying the driver in bills.
현금 없는 버스 - TAG OFFTap your card when you get off too
Tapping off is how transfer discounts are counted, and it's when the low-balance warning plays.
No cash? The Climate Card short pass
- PASSUnlimited rides for 1, 2, 3, 5 or 7 days
₩5,000 (1 day), ₩8,000 (2), ₩10,000 (3), ₩15,000 (5), ₩20,000 (7). Covers subway lines in Seoul and Seoul-licensed city, village and night buses.
- BUYNew subway machines take foreign cards
Since March 2026, new ticket machines in Seoul's subway sell the Climate Card and single-journey tickets with overseas credit and debit cards.
- CHECKCheck your route first
Not every line or airport bus is included, so check the route before you buy.
Say it in Korean (show this screen)
- SAYPlease top up 10,000 won.
man won chung-jeon hae ju-se-yo
만 원 충전해 주세요 - SAYWhere can I top up my card?
ka-deu chung-jeon eo-di-seo hae-yo?
카드 충전 어디서 해요? - SAYHow much is left on my card?
jan-aek eol-ma nam-a-sseo-yo?
잔액 얼마 남았어요?
Local tips
- Our tip: one card per person. Sharing a card breaks transfer discounts.
- Our tip: keep a ₩10,000 note for top-ups; many visitors get stuck only because they have no cash.
- Fares, passes and payment options can change; check at the station before you buy.
FAQ
What does "jan-aek-i bu-jok-ham-ni-da" mean on a Seoul bus?
It's 잔액이 부족합니다, "balance too low": your transit card doesn't have enough for the fare, so top up and tap again.
How do I top up a T-money card in Seoul?
Pay Korean won in cash at a convenience store counter or a subway station card reload machine.
Can I pay cash on a Seoul bus?
Not always: some Seoul buses are cash-free, so top up your card before you board.
Can I buy a Seoul transit pass with a foreign card?
Yes, new subway ticket machines sell the Climate Card short pass (1–7 days, from ₩5,000) with overseas cards.
Sources: Seoul Media Hub: bus readers warn when T-money is low (Dec 11, 2012) · News Tomato: low-balance alerts on Seoul buses (Dec 10, 2012) · SBS Biz: T-money top-ups with foreign cards (Mar 19, 2026) · Seoul Metropolitan Government: Climate Card FAQ · Economist Korea: tourists top up with cash (Nov 19, 2024) · Seoul Media Hub: cash-free buses expand (Mar 17, 2023) · Hani Seoul: T-money card guide