🚙 UK Mileage Allowance Calculator (HMRC 45p Rate)

Using your own car for work? See what HMRC lets you claim.

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Formula at a glance

UK Mileage Allowance Calculator: Allowance — 45p × first 10,000 miles + 25p × the rest. Example: 12,000 miles, employer pays 25p → Approved mileage allowance: £5,000.00
How the UK Mileage Allowance Calculator works: Allowance — 45p × first 10,000 miles + 25p × the rest

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📘 About the UK Mileage Allowance Calculator

HMRC's approved mileage allowance payments (AMAP) are 45p a mile for the first 10,000 business miles in a tax year and 25p after that for cars and vans, 24p for motorcycles and 20p for bicycles. Employers can pay these tax-free.

If your employer pays less, you can claim Mileage Allowance Relief on the difference through form P87 or Self Assessment. If they pay more, the excess is taxable. Driving to your normal workplace is commuting and does not count.

🧮 Formula

Allowance
45p × first 10,000 miles + 25p × the rest
Tax relief
(allowance − amount paid) × your tax rate

✏️ Worked examples

12,000 miles, employer pays 25p

You enter
Business miles in the tax year12,000 miles
VehicleCar or van
Your employer pays per mile0.25 £
Work passengers carried0
Your income tax rate20%
You get
Approved mileage allowance£5,000.00
Paid by your employer£3,000.00
Mileage Allowance Relief you can claim£2,000.00 of deductible expenses
Tax back at 20%£400.00

£5,000.00.

Self-employed, 6,000 miles

You enter
Business miles in the tax year6,000 miles
VehicleCar or van
Your employer pays per mile0 £
Work passengers carried0
Your income tax rate20%
You get
Approved mileage allowance£2,700.00
Mileage Allowance Relief you can claim£2,700.00 of deductible expenses
Tax back at 20%£540.00

£2,700.00.

🧭 How to use this calculator

What you enter

  • Business miles in the tax year (miles)
  • Vehicle
  • Your employer pays per mile (£)0 if nothing.
  • Work passengers carried
  • Your income tax rate

What you get

  • Approved mileage allowance
  • Paid by your employer
  • Mileage Allowance Relief you can claim
  • Tax back at 20%

❓ Frequently asked questions

What is the HMRC mileage rate for 2026/27?

45p a mile for the first 10,000 business miles and 25p after, for cars and vans. Motorcycles 24p, bicycles 20p, and 5p for each passenger.

Can self-employed people use 45p a mile?

Yes, sole traders can use simplified expenses at the same rates instead of actual car costs.

How do I claim mileage tax relief?

Online with form P87 if your expenses are under £2,500, or through Self Assessment.

Is commuting covered?

No. Only business journeys count — for example to a client or a temporary workplace.