Do I need Form 2290 for a bus?
Buses with a taxable gross weight of 55,000 lbs or more file Form 2290 just like any other highway vehicle. School buses, transit buses, and motorcoach equipment that meet the weight threshold are taxable highway vehicles under 26 USC §4482. Most full-size motorcoaches do meet the threshold; transit buses often do as well.
IRS Form 2290 applies to any highway vehicle (motor vehicle designed to carry a load over public highways) with a taxable gross weight of 55,000 lbs or more. The vehicle category — tractor, straight truck, bus, motorcoach — does not affect the threshold. If the gross weight is at or above 55,000 lbs, the vehicle is taxable.
A standard 45-foot motorcoach typically grosses 50,000-54,000 lbs and falls below the threshold. Larger 60-passenger transit buses and double-decker motorcoaches commonly cross the 55,000-lb mark. Curb-weight plus typical passenger load is the operative figure — the IRS applies the same "taxable gross weight" calculation as for trucks.
School buses are typically below the 55,000-lb threshold and not subject to Form 2290. Articulated transit buses (the bend-in-the-middle "tandem" designs) often weigh in higher and may be taxable. The fleet operator computes the taxable gross weight of each unit and files only on the units that meet the threshold.
Passenger carriers subject to Form 2290 file the same way as freight carriers. The stamped Schedule 1 returns through the same workflow and is used for state DMV registration purposes the same way.