SONJA

Tools for selling your car

Four free calculators and checklists that help you understand depreciation, which sales channel pays off, and how to sell safely. When you are ready, dealers can bid on your car with Sonja.

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Choose a tool

Depreciation calculatorMost used

See what your car is worth today, how much it has dropped from new, and its likely value in 3 and 5 years — shown as a simple curve.

See the depreciation curve for your car
Find model variant

Find out which model variant your car is — and see the original list price for every variant.

Find variant and list price
Sell privately or trade in?

Compare what you typically keep from a private sale versus a trade-in — in kroner, with liability and time factored in.

Compare in kroner
Avoid scams when selling privately

Short ground rules and common scam patterns when you sell your car privately.

Read the rules before you sell
EV value and battery

See how battery health (SOH) affects the value of your EV, and what you should document before selling.

Adjust battery health and see the impact

Start with plate and mileageLet dealers compete for your car.

  1. Look up your car
  2. Photos and answers
  3. Dealers bid
  • Norwegian Public Roads Administration (Statens vegvesen)
  • Gire
  • Vipps
  • Statistics Norway (SSB)
  • OFV

Questions and answers

Frequently asked questions

Are the tools free to use?
Yes. All tools on this page are free and completely non-binding. You do not need to provide contact information to use them. If you want dealers to bid on the car afterwards, you can continue with your registration number and mileage — that is also free, and you decide whether to accept.
How accurate are the estimates?
The estimates are built on official list prices from OFV, vehicle data from the Norwegian Public Roads Administration, and market data calibrated against advertised prices. They are accurate for typical cars, but they remain estimates: condition, service history, equipment level, and local demand can move the price in both directions. A real bid requires your specific car — photos and condition.
Do you store what I enter?
No. What you enter in the calculators is only stored locally in your browser, so you don't have to re-enter your car when switching tools. No information is sent to Sonja until you choose to start the auction.
Which cars do the tools work for?
The tools cover passenger cars registered in Norway. A registration number lookup automatically fetches brand, model, model year, and fuel type from the Norwegian Public Roads Administration. If we cannot find an official list price for the model, we show a typical value trajectory for the segment instead — clearly labeled.