RealCost Guide

Average Car Cost Per Mile UK

Car cost per mile is not just fuel. A realistic figure should include insurance, road tax, servicing, repairs, tyres, depreciation, parking and other ownership costs spread across the miles you drive.

Use this page to estimate what your car really costs per mile, spot why low-mileage cars can still be expensive, and avoid judging a car by fuel economy alone.

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Fuel cost per mile is not the full cost per mile

Fuel cost per mile only tells you what petrol or diesel costs for each mile. Full car cost per mile includes the wider cost of owning and running the car.

A car can be cheap on fuel but still expensive per mile if insurance, repairs, tyres or depreciation are high.

Calculate your full car cost first

Use the Car Cost Calculator to estimate your yearly ownership cost. Then divide the yearly result by your annual mileage to work out your full cost per mile.

The calculator estimates ownership cost. To get cost per mile, divide the yearly total by your annual mileage.

Quick answer: full car cost per mile = total yearly car cost ÷ annual mileage. For example, a car costing £4,800 per year and driven 8,000 miles costs about 60p per mile.

How to calculate car cost per mile

Use the full yearly cost of the car, then spread it across the miles you actually drive.

Step 1

Estimate your total yearly car cost, including fuel, insurance, maintenance, tax, repairs, parking and depreciation.

Step 2

Work out your realistic annual mileage. Use actual mileage if you know it, not a guess from one busy month.

Step 3

Divide yearly cost by annual mileage. That gives your estimated full car cost per mile.

Example car cost per mile results

These are simple examples to show the calculation. Your own result depends on your car and mileage.

£3,000 per year / 10,000 miles

Estimated full cost per mile: 30p per mile.

£4,800 per year / 8,000 miles

Estimated full cost per mile: 60p per mile.

£6,000 per year / 6,000 miles

Estimated full cost per mile: £1.00 per mile.

Why low mileage can mean high cost per mile

Driving fewer miles does not remove fixed car costs.

Fixed costs stay

Insurance, road tax, MOT, servicing and depreciation can still apply even if you barely drive.

Costs are spread over fewer miles

If a car costs £3,000 per year but only does 3,000 miles, it costs £1 per mile before any journey-specific extras.

What should be included in full cost per mile?

The more complete the yearly cost estimate, the more useful your cost-per-mile figure becomes.

Fuel or charging
Petrol, diesel or electricity cost based on actual use.
Insurance
A fixed or semi-fixed cost that can dominate low-mileage ownership.
Maintenance and repairs
Servicing, MOT, tyres, brakes, repairs and wear-and-tear.
Road tax and fees
Vehicle tax, permits, tolls or other regular motoring costs.
Parking
Workplace parking, permits, station parking or regular parking spend.
Depreciation
The value the car loses while you own it.

Fuel cost per mile vs full car cost per mile

They are both useful, but they answer different questions.

Fuel cost per mile

Useful for comparing MPG, fuel price and journey fuel cost. It does not include ownership costs.

Full car cost per mile

Useful for judging whether the car is worth owning, commuting in or replacing.

RealCost warning: do not claim a car costs “only 15p per mile” if that only includes fuel. Full ownership cost per mile is usually much higher.

When car cost per mile is useful

Cost per mile is best when you are comparing choices, not just describing a car.

Checking whether a commute is worth it
Comparing two cars with different running costs
Deciding whether to keep or replace a car
Understanding the cost of low-mileage ownership
Comparing driving with train, bus or car sharing
Checking whether a cheap car is actually cheap to use

How to reduce car cost per mile

The goal is not just cheaper fuel. It is lower total cost for the miles you actually drive.

Choose a car with sensible insurance and repair risk
Avoid overpaying for a car that will depreciate heavily
Keep up with servicing to avoid bigger repair bills
Use the right car for your mileage and journey type
Check whether low mileage still justifies ownership
Compare full yearly cost, not only fuel economy

How this page is different from the Fuel Cost Per Mile Calculator

This page is about full ownership cost per mile. The fuel calculator is about fuel only.

This page
Full car cost per mile, including ownership and running costs.
Fuel Cost Per Mile Calculator
Fuel-only pence per mile based on MPG and fuel price.
Car Cost Calculator
The best starting point for calculating the yearly total to divide by mileage.

Useful cost-per-mile calculators and guides

Use these to break car cost into clearer parts.

Car cost calculator
Open calculator →
Fuel cost per mile
Open calculator →
Maintenance cost
Open calculator →
Depreciation
Open calculator →
Electric vs petrol
Compare costs →
Is owning a car worth it?
Read guide →

Related guides

Use these if you are deciding whether your car is worth what it costs.

Average Car Cost Per Year UK

Estimate the yearly total before turning it into a cost-per-mile figure.

Read guide →

Average Cost of Running a Car UK

See how fuel, insurance, tax and maintenance fit together.

Read guide →

Cost of Driving to Work UK

Check whether your commute is costing more than it looks.

Read guide →

Should I Drive or Use Public Transport?

Compare driving with train, bus and other travel choices.

Read guide →

Average car cost per mile UK FAQs

How do I calculate car cost per mile?

Estimate your full yearly car cost, then divide it by your annual mileage. For example, £4,800 per year divided by 8,000 miles is 60p per mile.

Is car cost per mile the same as fuel cost per mile?

No. Fuel cost per mile only covers petrol, diesel or charging. Full car cost per mile includes insurance, tax, maintenance, repairs, parking and depreciation as well.

Why is cost per mile high for low-mileage drivers?

Fixed costs such as insurance, MOT, tax and depreciation are spread across fewer miles, so each mile carries more of the yearly cost.

Should depreciation be included in cost per mile?

Yes, if you want the true ownership cost. Depreciation is money lost when the car falls in value, even though it is not a monthly bill.

When is car cost per mile useful?

It is useful for comparing cars, checking commute value, judging whether ownership is worthwhile and seeing whether a cheap car is actually cheap to use.

How can I reduce my car cost per mile?

Choose a car with sensible insurance, repair risk, fuel cost and depreciation. Keep up with maintenance and make sure ownership still makes sense for your mileage.

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