Estimate how much a brand-new car could lose in value over 1–10 years, compare petrol, diesel, hybrid and electric depreciation, and model the company car Benefit-in-Kind tax impact for 2026/27.
A new car often loses value fastest during the first few years because it moves from showroom-fresh to used-market stock.
New car depreciation is the amount a brand-new vehicle loses between the purchase date and a later resale, part-exchange or finance settlement date. It is usually the largest single cost of buying new, even though it is not a monthly bill you pay directly.
The first year is normally the most painful. A new car can lose a large chunk of value as soon as it is registered because it is no longer a new vehicle. After that, age, mileage, condition, supply, finance returns, new model launches and demand decide how quickly the curve continues downward.
This calculator is designed for UK drivers comparing brand-new cars in 2026. It estimates retained value, cash depreciation, average monthly value loss and company car tax. The results are planning estimates, not guaranteed sale prices, but they help you compare cars before signing a finance agreement or placing a factory order.
The biggest mistake is judging a new car only by the discount or monthly payment. A £3,000 discount looks attractive, but if the car loses £12,000 in the first three years, the real cost can still be high. Strong residual value often matters more than a headline saving.
Use the market value tab for resale estimates, the BiK tab for company cars, or the comparison tab for EV vs petrol planning.
Different vehicle types can follow very different curves even when the purchase price is similar.
Cars that need heavy new-car incentives can suffer when nearly-new examples compete with discounted factory stock. A big discount helps the first buyer, but it can also reset used values lower.
Hatchbacks, crossovers and family SUVs often sit in the middle. Demand is broad, but supply can be high because many enter fleets, PCP agreements and lease channels.
Cars with trusted reliability, sensible running costs, limited discounting and strong used demand tend to hold a higher percentage of their original price.
EV depreciation depends on battery range, charging speed, warranty, public confidence, new-car discounts and how quickly newer models improve.
Some premium models hold value well, but expensive options and high list prices can still produce large cash depreciation even if the percentage looks reasonable.
Hybrid demand can be strong when fuel economy and company car tax are attractive, but the exact BiK rate depends on emissions and electric range.
Useful planning numbers for depreciation, company cars and vehicle tax.
Many new cars see the sharpest loss in the first year because they move from new to used status.
Common planning range for many mainstream cars, although strong models can perform better.
For 2026/27, zero-emission company cars sit at 4% under HMRC company car benefit tables.
GOV.UK lists the standard rate for many electric, zero and low-emission cars at £200 for 2026/27.
From April 2026, zero-emission cars above £50,000 can be liable for the expensive car supplement.
The highest 2026/27 company car appropriate percentage remains 37% for high-emission cars.
The first few ownership years are where most of the value loss happens.
A car becomes used as soon as it is registered. Even delivery mileage can reduce what buyers will pay compared with a factory-new car.
The first 10,000 to 30,000 miles can shift a car from nearly-new to ordinary used stock, especially if many similar examples are available.
Facelifts, new engines, battery upgrades and plate changes can make older stock look less attractive, affecting resale values.
After year three or five, annual percentage losses often slow, but condition and repair risk become more important.
The calculator combines simple market curves with mileage and tax assumptions.
The calculator starts with broad UK retained-value profiles. Fast-depreciating cars lose more early; strong residual cars keep more value.
BiK is calculated from the car's list/P11D value and appropriate percentage, not the used market value or actual discount paid.
The comparison tab focuses on depreciation, but a real decision should also include energy cost, insurance, servicing, tyre wear and charging access.
The first owner pays for choice, freshness, warranty headroom and showroom convenience.
A brand-new car carries a premium because the buyer can choose the colour, trim, options and delivery timing. Once the car is registered, the next buyer cannot choose those things in the same way. They are buying a used car with a previous keeper, some mileage and less remaining warranty, so they expect a discount.
New cars also compete with dealer demonstrators, pre-registered stock, lease returns and manufacturer finance offers. If the manufacturer is discounting new stock heavily, nearly-new cars must fall as well. This is why a car can look like a bargain after a large discount, but still depreciate if even cheaper deals appear later.
Plate changes in March and September can influence buyer behaviour because a newer plate often feels more desirable, even if the mechanical difference is small. The effect is not always dramatic, but it can matter for nearly-new cars and dealer forecourts.
Finally, finance structures make depreciation more visible. PCP deals use a predicted future value, lease companies price monthly rentals around residual value, and company car drivers are taxed on list price through BiK. When the market moves, these assumptions can decide whether a car feels cheap or expensive over the full ownership period.
You cannot avoid depreciation completely, but you can reduce the risk of choosing a fast-losing car.
Look for cars that sell quickly used and have a good reliability reputation. Broad buyer appeal usually protects resale value better than niche styling or unusual trims.
A discount helps if it is genuine and not already reflected in used values. If everyone can buy the same new car cheaply, used prices may also be lower.
Expensive options rarely retain full value. Choose popular features that second-hand buyers want, such as safety tech, parking aids and sensible wheels.
Low mileage helps resale, but finance mileage must be realistic. Underestimating mileage can lead to charges or a weaker settlement position.
Compare total amount payable, expected value, BiK, VED and running costs. A lower monthly payment is not always the lowest total cost.
Keep service history, invoices, keys and charging cables. A clean history can make a car easier to sell and can support a better price.
Company car tax does not follow market depreciation; it uses list price and the appropriate percentage.
For company car drivers, a new car has two separate costs to understand. The first is market depreciation, which affects the employer, lease company or finance provider. The second is Benefit-in-Kind tax, which affects the employee personally. BiK is based on the P11D/list value and HMRC appropriate percentage, not what the car is worth in the used market.
This is why zero-emission company cars can look very attractive. The 2026/27 zero-emission appropriate percentage is 4%, while high-emission cars can be taxed at much higher percentages. A higher list price EV can still produce a lower personal tax bill than a cheaper petrol car if the BiK percentage is much lower.
Plug-in hybrids sit in the middle. Their BiK rate depends not only on CO₂ emissions but also on electric-only range. A PHEV with a longer electric range can be taxed much more favourably than one with a shorter range. For accurate payroll calculations, always use the car's official CO₂, electric range and P11D value.
Use this table to understand how depreciation affects different 2026 buying decisions.
| Scenario | Depreciation Risk | What to Check |
|---|---|---|
| Cash buyer choosing a brand-new car | Highest cash exposure in years 1–3. | Look at nearly-new prices and expected retained value before buying. |
| PCP buyer with low deposit | May have little equity if depreciation is faster than expected. | Compare GMFV, total amount payable, mileage and early settlement terms. |
| Company car driver choosing EV | Market depreciation can vary, but BiK may be highly favourable. | Check P11D value, BiK %, charging access and employer policy. |
| High-mileage business driver | Mileage can weaken residual value quickly. | Use realistic annual mileage and compare lease, PCP and outright purchase. |
| Buyer choosing a discounted run-out model | Discount helps upfront but may reflect weaker demand. | Check whether used prices have already adjusted downward. |
UK registration plate changes can influence buyer behaviour, especially for nearly-new cars.
In the UK, new registration plates arrive twice a year, in March and September. A plate change does not automatically cut every car's value overnight, but it can change how buyers compare nearly-new stock. A car registered just before a new plate can look slightly older in adverts, even if the difference in mileage, warranty and condition is tiny.
This matters most when the car is still young. A six-month-old car, a dealer demonstrator and a pre-registered car all compete with brand-new stock. If the same model is available on a newer plate with a similar discount, the older example may need a sharper price to attract buyers. That is why timing can matter when buying new, selling early or choosing a short finance term.
For longer ownership periods, plate changes become less important. A seven-year-old car is judged more on condition, mileage, service history, MOT record and repair risk than on which half-year plate it wears. Still, if you plan to change cars every 12 to 24 months, registration timing is worth considering because the early depreciation curve is steepest.
Use this simple checklist before placing an order or signing a finance agreement.
Search for the same model at 6, 12 and 24 months old. If nearly-new prices are already far below list, the market may be warning you about weak residual values.
Look beyond monthly payments. Add deposit, interest, optional final payment, fees and expected resale value to understand the true cost of owning the new car.
High insurance groups, large wheels and specialist tyres can hurt used demand. A car that is expensive to run often needs a lower used price to sell quickly.
Pick options that future buyers value, not only options that look good on day one. Popular colours, driver assistance, parking aids and sensible trim levels usually help.
Small assumptions can make a new car look cheaper than it really is.
The first common mistake is using list price rather than actual transaction price. If a car has a £40,000 list price but everyone can buy it for £35,000 after incentives, the used market usually prices against the real deal, not the brochure figure. Your depreciation should be measured from what you actually paid, while company car BiK still uses the list/P11D value.
The second mistake is assuming all cars in the same fuel type behave the same way. Some petrol cars hold value well; some EVs depreciate quickly; some hybrids are extremely desirable; and some diesel cars still make sense for high-mileage drivers. Fuel type matters, but model demand, supply and running costs matter just as much.
The third mistake is ignoring ownership length. A car that is expensive to own for 12 months may look much better over six years if it is reliable and the curve flattens. Equally, a car with a cheap monthly lease can still be costly if the deposit is high and the term is short. Always compare the same period and mileage when judging alternatives.
The final mistake is forgetting condition. Depreciation calculators assume an average car. If the vehicle is damaged, poorly serviced, missing keys, on worn tyres or in an unpopular colour, the real value can fall below the estimate. If it is low-mileage, well-maintained and in a desirable specification, it may outperform the generic curve.
Use these tools alongside the new car depreciation calculator for a full ownership view.
Common questions UK buyers ask before purchasing a new car in 2026.