Calculate the cost of modifying a vehicle

Here you can calculate how much you’ll have to pay in one-off registration tax when you modify a vehicle. This increase in one-off registration tax is calculated in accordance with the rules and rates that apply at the time the tax is paid.

Important information

A modification must be reported to the Tax Administration when the modification is taxable.

An increase in engine power is generally only reportable and taxable for snowmobiles and for motorcycles without registered CO2 in the Public Roads Administration’s vehicle register.

The calculator will tell you if you have to report and pay for the modification.