No, you do not have to "tag off" or "tap out" when exiting a San Francisco Muni bus or light rail vehicle. The Muni system (which includes all SFMTA buses and the Muni Metro) operates on a flat-fare basis, meaning your Clipper card is charged a single fixed rate regardless of how far you travel. You only need to tag your card at the reader when you board through any door. Once you reach your destination, you simply walk off the vehicle or through the fare gates, which have motion sensors that open automatically without requiring a second tap. This is a common point of confusion for travelers in 2026 because other Bay Area transit services like BART and Caltrain do require you to tag off to calculate the distance-based fare; failing to tag off on those systems results in being charged the maximum possible fare for the line. For Muni, your single tap grants you a 120-minute "transfer" window, allowing you to switch to other Muni lines for free within that timeframe. Always ensure you have your "Proof of Payment" (your tagged Clipper card or a paper transfer) in case a fare inspector boards the vehicle.