You need to get HGV or bus or trailer MOT (also known as an ‘annual test’) for:

• goods vehicles with a gross weight of more than 3,500 kilograms (kg)
• vehicles that are built or have been adapted to form part of an articulated vehicle
• semi-trailers
• horseboxes with a gross weight of more than 3,500kg
• ‘A’ frame trailers and converter dollies manufactured on or after 1 January 1979
• trailers with an unladen weight of more than 1,020kg with powered braking systems (instead of standard overrun brakes and as well as the required parking brake)
• all public service vehicles (such as buses and coaches) with more than 8 passenger seats - not including the driver’s seat