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Car depreciation: how much value a car really loses
The biggest cost of owning a car is the one you never see coming. Here's how depreciation really works.
Drive a brand-new car off the forecourt and, before you've reached the end of the road, it's already worth less than you paid for it. That quiet, invisible loss has a name — depreciation — and for most people it's the single most expensive thing about owning a car.
It's the cost nobody feels day to day, because you never write a cheque for it. Fuel, insurance and the odd repair all sting in the moment; depreciation just sits there, working away in the background, and only ever shows its face on the day you sell. Which is exactly why it's worth understanding before you buy, not after.
Here's how much value a car really loses in the UK, what makes some cars haemorrhage money while others barely flinch, and the handful of things that actually slow it down.
How the curve works
Depreciation isn't a steady drip. It's steepest right at the start and flattens out as the car ages — most of the damage is done in the first three years. As a rough guide for a typical petrol or diesel car doing average miles:
| Age | Value remaining (roughly) | On a £20,000 car |
|---|---|---|
| 1 year | 65–85% | ≈ £13,000–£17,000 |
| 3 years | 40–60% | ≈ £8,000–£12,000 |
| 5 years | 30–40% | ≈ £6,000–£8,000 |
Illustrative UK ranges drawn from published resale data — an individual car can sit well outside them depending on make, model, mileage and condition.
Notice the shape. A car can shed a fifth or more of its value in the first twelve months — the famous drop the moment it stops being "new" — then lose value more gently each year after. It's why a nearly-new car, two or three years old, is so often the sweet spot: someone else has already absorbed the steepest part of the fall for you. This is the same reason depreciation tops the list when you add up what a car really costs to run, comfortably ahead of fuel or insurance for most newer cars.
What actually drives it
Two identical cars can lose very different amounts, and it's rarely luck. The big levers are:
- Mileage. The one you most control. The UK average is roughly 7,000–10,000 miles a year, and buyers use that as a mental yardstick — a car noticeably above it looks "tired" and prices accordingly, while low, steady miles are worth real money at resale.
- Service history. A full, stamped record is one of the cheapest ways to protect value. A missing history spooks buyers and knocks hundreds off, sometimes more.
- Desirability. Popular models in sensible colours (greys, blacks, whites, silvers) sell quickly and hold up; a niche model in an acquired-taste colour sits on the forecourt and drops to shift.
- Condition. Kerbed alloys, scuffed bumpers and a lived-in interior all read as "money to spend" to a buyer, and each one is a lever to haggle you down.
- Spec and fuel type. The right options help; being the "wrong" fuel type for the moment — as diesels found when sentiment turned — can hurt more than any scratch.
The one you can move. Of everything on that list, mileage is the lever most within your control. You can't change the badge on the bonnet, but keeping a genuine eye on your mileage — and knowing when a long trip is quietly pushing you into higher-mileage territory — directly protects what the car's worth when you come to sell.
Electric cars: a moving target
EVs deserve their own note, because their depreciation story has been unusually bumpy. Early electric cars fell hard — new-tech nerves, fast-moving models and thin used demand meant some shed value alarmingly quickly in 2023 and 2024. That gap has been closing: battery health is better understood and reported, used-EV demand has grown, and by 2026 a typical EV's three-year depreciation sits broadly in the same ballpark as a comparable petrol car rather than miles adrift.
"Broadly" is doing some work there, though — EV residual values still vary more model to model than the petrol equivalents, so it pays to check the specific car rather than trust the category. If you're weighing one up, it's worth reading alongside the running-cost comparison, because a cheaper-to-fuel car that loses more at resale can quietly cancel out its own savings.
How to lose less
You can't beat depreciation — every car loses value — but you can absolutely soften it:
- Buy nearly-new, not new. Let the first owner take the forecourt hit; a two-to-three-year-old car has done its steepest falling.
- Keep the miles honest. Sensible, average mileage keeps you inside the range buyers expect.
- Keep every service stamp and receipt. A complete history is worth more than it costs.
- Choose boringly popular. A common model in a neutral colour is easier to sell and holds up better.
- Look after the small stuff. Fixing a £60 kerbed alloy before you sell can save you far more in haggling.
And if you already own the car, the decision that matters most is how long you keep it. Selling in year one crystallises the worst of the loss; holding through the flatter part of the curve spreads that same drop across far more years of use.
Keep an eye on the number that moves resale most.
MileMind logs what your car actually costs to run and keeps track of your mileage pace — and mileage is the one big lever on resale value you genuinely control. A tidy cost-and-mileage record is also exactly what a careful buyer pays more for. Private by design, no ads.
Download on App StoreDepreciation is unavoidable, but it isn't random. Buy the right car in the right way, keep the miles and the history clean, and you turn the biggest cost of motoring from a nasty surprise into something you saw coming — and softened.
Figures in this article are illustrative UK ranges for 2026, gathered from published resale and motoring-cost data, and are provided for general information only — they're not financial advice. Actual depreciation varies widely with the make, model, mileage, condition and the market at the time you sell. Always do your own research before buying or selling.
