You must then register new information about the use of the vehicle. Demands for weight-based annual motor vehicle tax will then be determined by the Tax Administration.

If you use different trailers, you must use the rate for the combination of vehicles that gives the highest tax. This must minimum be the rate for the same vehicle without a trailer.

Daily tax rate for occasional trailer use

If you use a trailer occasionally, you can choose to pay a daily rate of 2 percent of the full vehicle tax instead. This also applies if you use a trailer that's not registered for the vehicle.

The main rule is that the daily tax must be paid to the Tax Administration before you can tow a trailer. However, the Tax Administration is aware that this can be difficult in practice under certain circumstances. In such cases, you may call the Tax Administration on 800 80 000 during office hours, or contact the Tax Administration via Altinn to register the daily tax. You'll then receive a decision letter with the payment information.