Car Running Cost Calculator UK
See the true annual cost of owning your car — every cost included, benchmarked against the UK average.
How does the running cost calculator work?
This calculator adds together every regular cost of keeping a car on the road in the UK — fuel or energy, insurance, road tax (VED), servicing and repairs, the MOT, and optionally parking and finance — to give you one honest annual figure and a monthly equivalent. It uses your actual fuel economy and local fuel price rather than a generic national average, so the number reflects your car, not a hypothetical one.
Fuel cost is calculated differently depending on fuel type. For petrol, diesel, and hybrid cars, the calculator converts your MPG figure into litres used (1 UK gallon = 4.546 litres) and multiplies by your fuel price. For electric cars, it works directly from miles per kWh and your electricity price per kWh, since EVs aren't measured in gallons.
Depreciation isn't included. Unlike the other costs here, depreciation depends heavily on the specific car, its age, and condition — there's no reliable universal formula for it. We deliberately exclude it from this calculator's total so the figure stays accurate and comparable, but it's typically the single largest cost of ownership. See the hidden costs section below for typical depreciation ranges.
3 worked examples
Example 1 — Petrol hatchback, average UK driver
A typical petrol family hatchback doing the UK average annual mileage, insured at a mid-range premium.
8,000 miles/year · 35 MPG · petrol at 157p/litre · £650 insurance · £195 VED · £250 servicing
Fuel cost:(8,000 ÷ 35) × 4.546 = 1,039 litres × £1.57 = £1,631
Total:£1,631 fuel + £650 insurance + £195 tax + £250 servicing + £55 MOT = £2,781/year (≈£232/month)
Example 2 — Diesel estate, higher mileage commuter
A diesel estate covering a longer commute, with efficiency benefiting from higher motorway mileage.
15,000 miles/year · 50 MPG · diesel at 170p/litre · £580 insurance · £195 VED · £350 servicing
Fuel cost:(15,000 ÷ 50) × 4.546 = 1,364 litres × £1.70 = £2,319
Total:£2,319 fuel + £580 insurance + £195 tax + £350 servicing + £55 MOT = £3,499/year (≈£292/month)
Example 3 — Electric car, home charging
A mid-size EV charged primarily at home overnight on a standard tariff, average UK mileage.
8,000 miles/year · 3.5 mi/kWh · electricity at 25p/kWh · £780 insurance · £195 VED · £150 servicing
Energy cost:(8,000 ÷ 3.5) × £0.25 = £571
Total:£571 energy + £780 insurance + £195 tax + £150 servicing + £55 MOT = £1,751/year (≈£146/month)
These three examples show the same "average" mileage driver paying anywhere from £1,751 to £3,499 a year depending on fuel type, engine, and mileage — which is exactly why a single national average figure is a starting point, not a personal answer. Run your own numbers in the calculator above.
What is the average cost of running a car in the UK in 2026?
The average UK driver spends approximately £3,407 per year on car running costs, excluding finance repayments and depreciation, according to RAC Report on Motoring data updated for 2026. When depreciation is included, the true annual cost of ownership for a typical family car rises to £5,000–£8,000 per year.
Costs vary widely depending on the type of car, how much you drive, where you live, and your insurance profile. London drivers typically pay far more due to higher insurance costs, parking, and the Congestion Charge, while rural drivers with garage parking and no toll roads often pay well under the national average.
Cost breakdown by category
How the average annual spend splits across categories, based on RAC and ABI 2026 data for a driver covering 8,000 miles a year in a petrol car.
| Category | Low driver | Average driver | High driver |
|---|---|---|---|
| Fuel | £750 | £1,250 | £2,350 |
| Insurance | £450 | £650 | £800 |
| Road tax (VED) | £195 | £195 | £195 |
| MOT | £55 | £55 | £55 |
| Servicing & repairs | £200 | £300 | £450 |
| Tyres (amortised) | £75 | £100 | £150 |
| Total (ex-depreciation) | £1,725 | £2,550 | £4,000 |
Common calculation mistakes
Comparing cars using manufacturer MPG instead of real-world MPG
Official MPG figures are tested under standardised lab conditions and are typically 10–20% more optimistic than real-world driving. Use a real-world figure from an owner community (Honest John, Fuelly) rather than the number on the window sticker, or your total will consistently understate your actual fuel cost.
Ignoring depreciation entirely when comparing ownership costs
Because depreciation isn't a bill, it's the cost most likely to be left out — but leaving it out doesn't make it zero. When comparing "should I buy new or used," always add an estimated depreciation figure on top of the running costs calculated here, or the comparison will unfairly favour buying new.
Using last year's fuel price
Fuel prices move week to week and sometimes swing by 10–15p per litre over a year. A running-cost estimate built on stale fuel prices can be meaningfully wrong within a few months — check the current price at our Fuel Cost Calculator or RAC Fuel Watch before relying on a figure.
Forgetting that servicing costs rise with car age
A 2-year-old car and a 10-year-old car of the same model do not cost the same to service. As cars age, wear items (brakes, suspension components, timing belts) start needing replacement, and average annual repair costs typically rise from under £200/year on a newer car to £400–£800/year past 8–10 years old.
Not adjusting insurance for a genuinely accurate quote
The £650 default in this calculator is a national average — your actual premium can easily be £300 or £1,500+ depending on age, location, claims history, and the specific car. Always use your real renewal quote, not the default, for a figure you can actually budget against.
How to reduce your annual car running costs
- Compare insurance quotes at renewal every year — loyalty doesn't pay, and switching typically saves £150–£400
- Consider telematics (black box) insurance if you're a careful, low-mileage driver — can cut premiums 20–40%
- Keep up with servicing on schedule to avoid costly repairs from neglect further down the line
- Check tyre pressures monthly — under-inflation by 8 PSI cuts fuel economy by around 4%
- Use an independent garage instead of a main dealer once the warranty period ends — typically 30–60% cheaper
- Consider whether you need the car for every journey — car clubs like Zipcar or Enterprise Car Club can be cheaper than ownership for very low-mileage drivers
For a full breakdown of savings strategies with exact figures, see our guide: How to Reduce Car Running Costs in the UK — 14 Proven Ways.
How we calculate
Fuel cost (petrol/diesel/hybrid) = (Annual mileage ÷ MPG) × 4.546 × fuel price per litre
Energy cost (electric) = (Annual mileage ÷ mi/kWh) × electricity price per kWh
The total is: fuel/energy cost + annual insurance + annual road tax + annual servicing + parking (monthly × 12) + finance (monthly × 12, if entered) + the current maximum MOT fee (£54.85, set by the DVSA). Cost per mile is the total divided by annual mileage. The "vs UK average" comparison uses the RAC Report on Motoring 2025 figure of £3,407/year, which itself excludes finance and depreciation — so your total is only directly comparable to that average if you also leave finance blank.
Depreciation is intentionally excluded from the calculated total (see the "how it works" section above) since it depends on the specific vehicle rather than a universal rate, but typical ranges are given in the hidden costs section so you can add your own estimate.
Frequently asked questions
What is the average cost of running a car in the UK?
Around £3,407 per year excluding finance and depreciation, based on RAC Report on Motoring data for a typical driver covering 8,000 miles annually. Including depreciation, the true cost of ownership is typically £5,000–£8,000 per year for a newer car.
Does this calculator include depreciation?
No — depreciation depends too heavily on the specific car, its age, and condition to calculate reliably with a general formula. It's usually the largest single cost of ownership, so budget separately for it: typically 15–35% of the car's value in year one, and 50–60% over three years.
How accurate is the fuel cost figure?
As accurate as the MPG or mi/kWh figure and fuel price you enter. Use your car's real-world MPG (from an owner community like Fuelly or Honest John) rather than the manufacturer's official figure, which is typically 10–20% more optimistic than real-world driving.
Why is my result different from the UK average?
The £3,407 average reflects a specific mix of assumptions — a petrol car, 8,000 miles a year, and average 2025/26 insurance and fuel prices. Your own mileage, fuel type, postcode, and driving history can easily push your real cost well above or below that figure — that's exactly why a personalised calculator is more useful than a single national number.
Should I include my car finance payment?
Only if you want your total to reflect your actual monthly outgoings including the loan. For a pure "cost of running the car" figure comparable to the UK average benchmark (which excludes finance), leave it at £0.
References & data sources
- RAC — Report on Motoring 2025. National average annual car running cost figures, updated for 2026 fuel and insurance pricing. Used for the £3,407/year benchmark and the low/average/high driver cost breakdown table.
- GOV.UK — Vehicle tax rate tables. Current 2026 VED (road tax) rates used as the calculator's default road tax figure.
- DVSA — MOT fees. Maximum MOT test fee for cars (£54.85), added automatically to every calculation.
- ABI (Association of British Insurers) — Motor Insurance Premium Tracker. UK average car insurance premium data used as the calculator's default insurance figure and in the cost breakdown table.
Figures reflect UK national averages as of May 2026 and will drift over time as fuel prices, insurance markets, and tax rates change. Always use your own real quotes and bills where possible for the most accurate personal total.