HMRC lets you claim business mileage at fixed pence-per-mile rates without keeping individual fuel receipts. Mileage in the Books menu does the maths.
The rates
- Cars and vans — 45p / mile for the first 10,000 business miles in a tax year, 25p / mile after.
- Motorbikes — 24p / mile, flat.
- Bicycles — 20p / mile, flat.
The 10,000-mile threshold is per vehicle, per tax year (6 April – 5 April).
Logging a trip
Mileage → New trip:
- Pick the vehicle (add it once if missing — reg plate + type).
- Date.
- From / To — addresses, postcodes, or descriptions ("Office", "Client X").
- Miles — round-trip total.
- Purpose — required by HMRC for audit. "Meeting with X", "Site visit" — vague "client" entries don't pass scrutiny.
Save. The trip lands in your year-to-date list with the claimable amount auto-computed.
Year-to-date overview
The page header shows three numbers for the current tax year:
- Miles logged
- Claimable amount (already accounting for the 10,000-mile rate change)
- Rate banding ("8,420 miles at 45p; 0 at 25p")
Where it flows
Mileage adds to your car/van travel expenses line on Self Assessment, or to motor expenses on a Ltd P&L. Don't also log fuel receipts for the same trips — the simplified rate covers fuel + insurance + maintenance + depreciation.
Export
CSV export at the bottom of the page lists every trip with date, vehicle, miles, purpose and amount — useful for HMRC enquiries.