How the estimate works
We apply typical UK depreciation rates year by year from the new price, then adjust for mileage against an average of about 8,000 miles a year and for condition. It gives a sensible range for a private sale. Dealer part-exchange offers are usually 10 to 20% lower, and online car-buying services vary.
What affects your car's value
- Age and mileage: the biggest factors. High mileage cuts value; low mileage for the age adds to it.
- Service history and MOT record: a full history and a clean MOT record give buyers confidence.
- Demand for the model: popular, reliable models in short supply hold value best.
- Condition: dents, kerbed wheels and worn interiors all reduce the price.
- ULEZ and clean air zone compliance: older diesels are worth less near London and other zone cities.
Getting the best price
- Compare listings for the same model, age and mileage on large classified sites.
- Get several instant offers. They cost nothing and set a floor.
- Fix small faults and clean the car well before photos.
- Have the V5C, service book and MOT history ready. See our V5C guide.
For a forecast of future value, use the car depreciation calculator.
Sources
Rates and rules last checked 15 October 2026. These figures are a guide. For a decision that matters, confirm with the official source.