Mileage Allowance Calculator
Work out the tax-free HMRC mileage allowance for business miles, the tax relief you can claim, or company car fuel rates.
Your business miles
UK unitsYour mileage allowance
Enter your details to calculate
Fill in the form to see your results.
How this is calculated
- Own vehicle: business miles × HMRC's approved rate (cars and vans: 55p for the first 10,000 miles in the tax year, then 25p).
- If your employer pays less, the gap is what you can claim Mileage Allowance Relief on; the tax back is that gap × your income tax rate. If they pay more, the extra is taxable.
- Company car: business miles × HMRC's advisory fuel rate for the fuel and engine size (rates from 1 September 2026).
HMRC sets how much your employer can pay you tax-free for business miles. Commuting to your usual workplace doesn't count. These are the rates the calculator uses:
Your own vehicle (2026 to 2027 tax year)
- Cars and vans: 55p a mile for the first 10,000 miles
- Cars and vans: 25p a mile after that
- Motorcycles: 24p a mile
- Bicycles: 20p a mile
Company cars (from 1 September 2026)
- Petrol: 14p (1,400cc or less), 17p (1,401cc to 2,000cc), 27p (over 2,000cc)
- Diesel: 15p (1,600cc or less), 16p (1,601cc to 2,000cc), 22p (over 2,000cc)
- LPG: 11p (1,400cc or less), 13p (1,401cc to 2,000cc), 20p (over 2,000cc)
- Electric: 7p (charged at home), 15p (charged at a public charger)
Running your own car? The journey cost calculator shows what a business trip really costs you in fuel.
Use this to check your employer's mileage payments, claim tax relief on the difference, or work out fuel for a company car. It's a guide, not tax advice.
Common questions
For business miles in your own car or van it is 55p a mile for the first 10,000 miles in the tax year and 25p a mile after that. Motorcycles are 24p and bicycles 20p a mile. Your employer can pay up to these amounts tax-free.
You can claim Mileage Allowance Relief from HMRC on the difference. You get back tax on it at your income tax rate, so a £1,000 gap is worth £200 to a basic-rate taxpayer. Claim online or through Self Assessment.
They are HMRC's rates for business miles in a company car, by fuel and engine size. Your employer can repay fuel at these rates tax-free, and you can use them to repay fuel for private miles. HMRC reviews them every quarter (March, June, September and December).