Seoul's public transit card is the T-money card.
Want the full guide? Get a PDF with tips for getting around Seoul smoothly — free.
Seoul uses the T-money card. The T-money card covers the subway and buses, with automatic transfer discounts, and even works in some taxis.
You can buy it at convenience stores (CU, GS25) or subway station machines.
Usually yes — it's typically faster than buying paper tickets and often cheaper per ride, even for just a couple of days.
In some cities you can tap a contactless card or phone directly, though it's worth checking current signage or the transit authority's site, since not every system supports it yet.