Car Depreciation Calculator UK: How Fast Does a Car Lose Value?

What Is Car Depreciation?

A car depreciation calculator works out car depreciation: the difference between what a car was worth when it was bought and what it is worth now. It is a loss in value rather than a running cost, so it never appears on a fuel receipt or a service invoice, but it is often the single largest expense of car ownership.

Depreciation begins the moment a car is driven off the forecourt. A car becomes "used" the instant it is bought, regardless of its mileage, which is why a new car can be worth noticeably less than its purchase price within days of collection. Rather than estimating by hand, you can see your own car's current estimated value with the site's free car depreciation calculator, free and with no sign-up.

Car Depreciation Calculator UK: How Much Does a Car Depreciate Each Year?

According to MoneyHelper, the government-backed Money and Pensions Service, citing CAP Automotive research, typical depreciation is 15-35% in the first year, depending on the make and model. By the time a car is three years old, it may have lost 50% or more of its original value.

The range is wide because depreciation is not fixed. A model with strong demand and a long manufacturer warranty may sit near the lower end, while a less popular or larger vehicle can fall faster. Buyers should treat these figures as a guide to the pattern rather than a precise prediction for any individual car.

Average Car Depreciation Per Year

Depreciation is steepest early on and slows as a car gets older. The largest drop comes in the first year, the second and third years continue the decline, and the curve then flattens as the car approaches the bottom of its value range. This is why buying nearly-new is often cheaper overall than buying brand new.

Mileage is one of the clearest signals of how a car has been used. GOV.UK's National Travel Survey (dataset NTS09) states that the average UK car travelled 7,100 miles in 2024. That figure gives owners a real benchmark: a car covering well above 7,100 miles a year will likely depreciate faster than one covering fewer, because higher mileage makes it less attractive to future buyers.

What Factors Affect a Car's Depreciation?

MoneyHelper lists a range of factors that influence how quickly a car loses value. Anyone comparing models, or working out what a car may be worth in a few years, should weigh these up before buying. The same factors are what a vehicle depreciation calculator typically asks about, and they are also sometimes called car devaluation.

• Mileage – higher annual mileage tends to speed up the loss in value.
• Reliability reputation – models known for dependability hold value better.
• Number of previous owners – check this via the V5C (logbook) or the site's vehicle history check.
• General condition – damage and wear reduce appeal to buyers.
• Service history – a complete record supports resale value.
• Manufacturer warranty – a longer remaining warranty is more attractive.
• Model age and updates – facelifts and replacements accelerate depreciation on older versions.
• Vehicle size – larger and luxury cars depreciate faster, as higher running costs put off used buyers.
• Fuel economy – efficient cars are easier to sell on.
• Road tax band and ULEZ compliance – a car that does not meet ULEZ emissions standards can be less desirable to buyers in affected cities.

Fastest Depreciating Cars UK: Which Models Lose Value Most?

According to Motorway's own sales-data analysis, these ten models lose value fastest, ranked from quickest to slowest (covering new to ten-year-old examples):

1. BMW 5 Series (Executive)
2. Peugeot 3008 (SUV)
3. Audi A4 (Compact executive)
4. Audi A5 (Compact executive / sports car)
5. Nissan Leaf (City car / EV)
6. Mercedes C Class (Compact executive)
7. Mercedes E Class (Executive)
8. Mazda CX-5 (SUV)
9. BMW 3 Series (Compact executive)
10. Nissan Qashqai (SUV)

Motorway gives several reasons for this. Executive and premium models often carry high new-car prices and expensive running and maintenance costs, which put off used buyers. Frequent model updates and redesigns, such as on the Audi A4 and A5, leave older versions looking dated quickly. Very high-supply popular models like the Nissan Qashqai see median prices pulled down because only the best-condition examples achieve top prices. The Nissan Leaf's early-generation EV technology has been overtaken by newer, longer-range electric cars.

By contrast, Motorway names the BMW i3 as the standout model that has increased in value on its platform, alongside small and city cars from reliable, affordable brands such as Toyota and Dacia, which generally hold value best.

Use Our Free Depreciation Calculator

Rather than estimating by hand, owners and buyers can get a quick figure with the site's free car depreciation calculator. It is free to use, requires no sign-up, and returns an instant result, making it straightforward to compare one car against another or see how a current car is likely to fall in value over time.

For more guides like this, see our Buying Guides section.