Mileage is one of the most common self-employed expense claims, but it needs a proper record. A bank payment for fuel does not prove which journeys were for business.
Business journeys vs private journeys
Only business travel is relevant for a mileage claim. Normal commuting and private trips should not be included.
- Client visits
- Supplier trips
- Travel between temporary work locations
What to record
A mileage log should show when, where and why the journey happened. It does not need to be complicated, but it should be consistent.
- Date
- Start and end points
- Business purpose and miles
Simplified mileage method
Many self-employed people use approved mileage rates rather than claiming actual vehicle costs. Choose the method carefully and keep records.
- Record total business miles
- Keep method consistent
- Speak to an adviser if unsure
Common mistakes
Common errors include estimating at year end, claiming private mileage, or mixing fuel receipts with mileage claims incorrectly.
- Do not guess annual mileage
- Avoid double claiming
- Keep evidence as you go
Using software
Apps and cloud bookkeeping tools can make mileage easier, especially for trades and mobile service businesses.
- Mileage tracking apps
- Monthly review
- Export records for tax return
Key takeaway
Mileage claims are strongest when the log is kept during the year, not reconstructed from memory at the deadline.
