Mileage Tax Rebate Calculator UK 2026

If you drive your own car for work and your employer reimburses you below HMRC's approved AMAP rates (55p / 25p from April 2026), you can claim the difference back as Mileage Allowance Relief. Enter your figures and we'll show you exactly what you can claim — free, direct from HMRC.

Your mileage

Tax yearAMAP rose to 55p from 6 April 2026; 45p applies for 2025/26 and earlier when backdating.Business miles per tax yearTotal business miles in your own vehicle. Excludes commute.Employer reimbursement rate (pence per mile)Your employer's rate per mile. If they pay the approved rate or more (55p in 2026/27; 45p in earlier years), no MAR claim is available.Your marginal income tax rateBackdated years to claim0Up to 4 historical tax years (assuming similar mileage pattern). For 2026/27 you can go back to 2022/23.

Your possible refund

Enter your business miles on the left.

How this calculator works

HMRC publishes "approved" mileage rates — the tax-free amount your employer can reimburse you for using your own vehicle for business journeys. For cars and vans the rate is 55p per mile for the first 10,000 business miles from 6 April 2026 (45p in 2025/26 and earlier) and 25p per mile above that. If your employer pays less, you can claim Mileage Allowance Relief on the shortfall at your marginal income tax rate. You can backdate up to 4 tax years.

Read the full UK mileage tax rebate guide for the eligibility test, evidence requirements, the HMRC Personal Tax Account walkthrough and the "temporary workplace" rule.

Disclaimer: PayslipIQ provides automated educational guidance based on the figures you supply. It is not regulated tax advice. Mileage Allowance Relief interacts with company-car tax, salary-sacrifice schemes and Self Assessment positions in ways outside the scope of this calculator. For complex situations, contact HMRC on 0300 200 3300 or use a CTA-qualified tax adviser.