Free calculator
Business mileage
allowance calculator
Work out the HMRC approved mileage amount for business journeys in your own vehicle, and compare it with what you've been paid.
2026/27 rates: 55p a mile for the first 10,000 business miles, then 25p.
Your result
Enter your business miles to see the approved amount.
Mileage allowance, tax relief and reimbursement are different things
Mileage allowance is the most HMRC lets you be paid tax free. HMRC doesn't pay you this amount.
Reimbursement is what your employer or business actually pays you.
Tax relief reduces your tax bill if you're paid less than the allowance. It depends on your tax rate and circumstances.
Ordinary commuting between home and a permanent workplace usually isn't business mileage. This calculator isn't for company car fuel, which uses Advisory Fuel Rates instead.
Rates last reviewed 23 October 2026.