Madrid's public transit card is the Tarjeta Multi.
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Madrid uses the Tarjeta Multi. The reloadable Tarjeta Multi covers metro, bus, and commuter rail — a 10-ride Metrobús ticket is the best value for short stays.
You can buy it at metro 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.