Work miles could mean
tax back.
Use your own car for work and get paid less than 55p a mile? See the tax you can claim back for every open year, check your mileage log against HMRC’s evidence rules, and get the right form and deadline.
Check your figures, see how to claim, and keep a clear plan for each year.
Your mileage claim check
Your tax years
The mileage deduction reduces your income. “Tax saved” is the estimated refund. Closed years are excluded from totals; planning estimates are separate.
| Tax year | Business miles | Rates | Approved amount | Employer paid | New mileage deduction | Tax saved | Effective rate | How to claim | Deadline | Status | Taxable excess |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 2023-24 (6 Apr 2023 – 5 Apr 2024) | 2000 | 45p then 25p | £900.00 | £560.00 | £340.00 | £136.00 | 40% | Write to HMRC for overpayment relief Overpayment relief guidance | 5 Apr 2028 | Open | £0.00 |
| 2024-25 (6 Apr 2024 – 5 Apr 2025) | 2000 | 45p then 25p | £900.00 | £550.00 | £350.00 | £140.00 | 40% | Amend your Self Assessment return Change your Self Assessment return | 5 Apr 2029 | Open | £0.00 |
| 2026-27 (6 Apr 2026 – 5 Apr 2027) | 6000 | 55p then 25p | £3,300.00 | £3,600.00 | £0.00 | £0.00 | 0% | Check your payslip or P11D | 5 Apr 2031 | Current tax year — claim now or after year end | £300.00 |
What this means
Mileage Allowance Relief is a deduction from your income. The refund is the Income Tax saved, not the whole mileage deduction.
Only eligible business journeys in your own vehicle count. Ordinary commuting does not qualify. Temporary workplaces have further rules, including the 24 month rule.
Car and van mileage shares a 10,000 mile threshold per job; associated jobs share one threshold. Motorbikes and bicycles are worked out separately.
Passenger payments up to 5p per mile can be tax-free, but there is no mileage allowance relief for passengers.
You can claim yourself for free on GOV.UK.
The log has been checked separately. Your entered annual mileage is used for the estimate.
Mileage log check
Fix the errors before claiming. 1 journeys counted (1 with a warning to fix), 2 excluded (errors). 1 warning.
- Row 1, journey — Needs fixing: Ordinary commuting between home and a permanent workplace isn't allowable (EIM32080).
- Row 2, from — Needs fixing: Add the start postcode.
- Row 3, purpose — Check this: Add more detail: HMRC needs the reason for every journey.
What to do next
- 31 Oct 2026 — Fix your mileage log before claiming
Add missing postcodes and reasons, correct errors, review warnings and remove ordinary commuting. Rows with errors are excluded from log totals.
- 31 Oct 2026 — Claim 2023-24 first
The deadline is 5 Apr 2028 — 522 days left. Write to HMRC for overpayment relief. Overpayment relief guidance
- 31 Oct 2026 — Get employer payment evidence for 2023-24
Keep payslips or expenses statements showing what each employer paid, with a separate mileage log for each job.
- 31 Oct 2026 — Get employer payment evidence for 2024-25
Keep payslips or expenses statements showing what each employer paid, with a separate mileage log for each job.
- 31 Oct 2026 — Ask payroll about 2026-27
Check your payslip/P11D. Your employer should have taxed mileage payments above the approved amount.
- 31 Oct 2026 — Keep your mileage logs and evidence
Keep dates, business miles, reasons and start/end postcodes for every journey, plus evidence of employer payments. You can claim yourself for free on GOV.UK.
- 31 Jan 2027 — 2024-25: Amend your Self Assessment return
Amend your 2024-25 return by 31 Jan 2027 to include your mileage deduction. Change your Self Assessment return
- 5 Apr 2028 — 2023-24: Write to HMRC for overpayment relief
Send a written overpayment relief claim to HMRC by 5 Apr 2028. State the year, amount, grounds, whether you appealed, and that the details are correct and complete to the best of your knowledge and belief. Sign it yourself. Overpayment relief guidance
- 6 Apr 2028 — Claims over £2,500 can go through PAYE
From 6 Apr 2028, the announced change removes the need to enter Self Assessment solely for employment expenses. Do not delay an earlier claim past its deadline.
Claim notes to copy
Check the figures and attach the evidence before sending to HMRC.
Fix the 3 log issues listed before attaching your log. 2023-24 claim note Main job, Car or van: 2000 business miles; rate 45p then 25p; approved amount £900.00; employer paid £560.00; mileage deduction £340.00. New mileage allowance relief claimed: £340.00 (after any mileage deduction already claimed). Before sending: check this statement is true and attach the log and employer payment evidence. 2024-25 claim note Main job, Car or van: 2000 business miles; rate 45p then 25p; approved amount £900.00; employer paid £550.00; mileage deduction £350.00. New mileage allowance relief claimed: £350.00 (after any mileage deduction already claimed). Before sending: check this statement is true and attach the log and employer payment evidence.
Keep or share your report
Anyone with this link can read the report, income figures and log issues. Share only with people you choose. Saved reports expire after 400 days.
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https://milepilot.dailyships.co.uk/r/sample-c
Assumptions
- Rates follow the supplied HMRC and GOV.UK guidance as at 31 Oct 2026.
- Income entered is total taxable non-savings income before the Personal Allowance and the mileage deduction.
- Savings and dividend income, Gift Aid and pension relief are not modelled.
- Tax saving is estimated using the income and mileage entered; no refund is guaranteed.
- 2027-28 is planning only. Scottish rates and bands are assumed to match 2026-27; they are set in the Scottish Budget. The 35p mileage change requires a statutory instrument.
- Employer payments and other expenses are entered by you; other expenses affect the claim route but their tax relief is not included.
- Educational tool, not tax advice.
Sources
- GOV.UK: business travel mileage — rules for tax
- GOV.UK: vehicles you use for work
- GOV.UK: form P87 and the £2,500 expenses threshold
- HMRC: increasing mileage rates from 6 Apr 2026
- HMRC Budget 2026: mileage and PAYE changes, sections 2.7 and 2.9
- HMRC: statutory mileage rates
- HMRC: approved amount
- HMRC: mileage allowance relief
- HMRC: evidence for employment expense claims
- HMRC: current and past Income Tax rates
- GOV.UK: previous Income Tax years
- GOV.UK: Scottish Income Tax
- HMRC: temporary workplaces
- HMRC: the 24 month rule and ordinary commuting
- LITRG: what the 2026-27 mileage increase means
Use Milepilot from a script
POST JSON to /api/check. Dates use YYYY-MM-DD; omit asOf to use today in the UK. The response includes the calculation, plain English report and saved share links.
POST /api/check
Content-Type: application/json
{"region":"rUK","years":[{"taxYear":"2026-27","income":30000,"employments":[{"car":{"miles":8500,"paidPence":30}}]}]}GET /api/samples for examples, /api/r/:id for saved report JSON, or /api/health for version information. Validation errors return 400 with an issues list. Maximum body: 256 KB. No account needed.