In 2026, the ability to use a credit card to take the MRT (Mass Rapid Transit) is increasingly common in major global hubs, but it depends entirely on the city's specific ticketing infrastructure. In Singapore, you can use any contactless Visa or Mastercard (or mobile wallets like Apple Pay) to "tap and go" at the MRT gantries through the SimplyGo system, eliminating the need for a separate EZ-Link card. Similarly, in London, the "Tube" has long accepted contactless bank cards for fare payment with automatic daily capping. In New York City, the OMNY system allows you to tap your credit card at any subway station. However, in other major systems like Taipei, Tokyo, or Seoul, the "tap and go" credit card feature is still being rolled out or is restricted to specific local bank cards; most international travelers there still need to purchase or refill a physical IC card (like Suica, Pasmo, or T-Money) with cash. Always check the specific transit authority's website before you arrive, as many systems are rapidly upgrading to "open-loop" payments to make travel more seamless for tourists.