Estimate approved mileage allowance for business journeys in your own vehicle.. It is designed to answer the common UK search intent for this topic with the key assumptions shown clearly.
HMRC MILEAGE
Business mileage calculator
Estimated result
£5,000
- Employer paid
- £3,000
- Mileage allowance relief basis
- £2,000
- First 10,000 miles
- 45p per mile
For cars and vans. Tax relief is normally on the shortfall, not a cash repayment of the full amount.
Estimate approved mileage allowance for business journeys in your own vehicle.
Estimate approved mileage allowance for business journeys in your own vehicle.. It is designed to answer the common UK search intent for this topic with the key assumptions shown clearly.
A worked example helps users compare the result against their own numbers and see why a headline rate does not always produce the same cash outcome.
- Different tax codes, payroll periods, Scottish bands, pension methods or lender assumptions can change the outcome.
- One-off bonuses, pay frequency, overpayments, allowances and reliefs can move the result away from a simple annual estimate.
- Where a rule depends on eligibility or legal status, this page shows an estimate and links to official guidance.
SOURCES & REVIEW
Checked against official guidance
Last reviewed 1 September 2026 · Rule version GB-2026.27.1
Daily/weekly source monitoring. If a source changes, the affected rule set is reviewed before publication.
All source links are kept visible so you can verify the figures used on this page.
Source line: Source links are kept visible and the method is reviewed for the current UK release.
GOV.UK: Expenses and benefits — business travel mileage ↗Sources, methodology and update policy →Report an issue or correction →WHY RESULTS DIFFER
Why two users can see different results
Why the result can differ
Different tax codes, payroll periods, Scottish bands, pension methods or lender assumptions can change the outcome.
One-off bonuses, pay frequency, overpayments, allowances and reliefs can move the result away from a simple annual estimate.
Where a rule depends on eligibility or legal status, this page shows an estimate and links to official guidance.
This section is intentionally repeated on key tools so the explanation stays near the result instead of being hidden in a separate policy page.
COMMON QUESTIONS
Frequently asked questions
Is this an exact lender, payroll or tax return?
No. It is an estimate based on the inputs and assumptions shown.
When was this checked?
The method and linked official guidance were reviewed for the current UK release.
Can the result change later?
Yes. Rate changes, source updates and personal circumstances can change the output.