In 2026, the answer depends on which "SNCF bus" service you are using. SNCF Connect (which integrates various operators) and BlaBlaCar Bus (the primary partner for long-distance "bus-replacement" and budget routes in France) do have toilets on board their long-distance coaches. These are typically located in the middle or rear of the bus. However, for shorter TER regional buses (autocars) that replace local train services on short branches, toilets are rarely available. These regional buses are designed for shorter transit times (usually under 90 minutes) and focus on maximum seating capacity. For the longer "Intercités" or "TGV-link" bus routes, you can generally expect a basic chemical toilet, air conditioning, and Wi-Fi. It is always a good idea to check the specific "Services" icons on your digital ticket in the SNCF Connect app; if a toilet is not available, the driver will usually schedule a "pause technique" (rest stop) at a service station for journeys exceeding two hours.