Mileage Allowance Relief Calculator
Calculate HMRC approved mileage payments and the tax relief you can claim on business journeys.
Your result
Updates as you type. Based on 2025/26 UK figures where relevant.
How this is worked out
HMRC rates are 45p a mile for the first 10,000 business miles by car and 25p after, 24p for motorbikes and 20p for bicycles. If your employer pays less, you can claim tax relief on the gap.
Tips
- UK MPG uses imperial gallons (4.546 litres), which differ from US gallons.
- HMRC's approved mileage rate is 45p per mile for the first 10,000 business miles.
- Home EV charging on an off-peak tariff is usually far cheaper than public rapid chargers.
Guides for this calculator
- How to Calculate Mileage Allowance Relief in the UK: Step-by-Step Guide
- Mileage Allowance Relief: Common Mistakes, Tips and FAQs
More motoring calculators
Frequently asked questions
How does the mileage Allowance Relief Calculator work?
HMRC rates are 45p a mile for the first 10,000 business miles by car and 25p after, 24p for motorbikes and 20p for bicycles. If your employer pays less, you can claim tax relief on the gap.
What MPG should I use?
Use your real-world figure from your car's trip computer if you can; official figures are often optimistic.
Can I claim for commuting miles?
No. Normal commuting to a permanent workplace doesn't count as business mileage.
How often do HMRC mileage rates change?
Rarely. The 45p rate has been unchanged for many years, but always check GOV.UK.
This calculator gives an estimate for general information. It isn't financial, tax, legal or medical advice. Check official figures on GOV.UK or NHS.uk, or speak to a qualified adviser.