Can You Claim Mileage and Fuel When Self-Employed?
Self-employed individuals must choose between claiming HMRC simplified mileage rates or actual vehicle costs for tax returns. Mixing methods on the same vehicle is prohibited.
No, you cannot claim both mileage rates and actual fuel costs for the same vehicle when you are self-employed. Under HM Revenue and Customs rules, you must select one method for your vehicle and apply it consistently. Mixing these two systems for a single car or van is strictly prohibited.
Key Takeaways: Crucial rules for self-employed vehicle claims
- You must choose either the simplified expenses mileage rate or the actual costs method for each vehicle you use.
- The chosen method is permanent for that specific vehicle for as long as it remains in your business ownership.
- The mileage rate encompasses all running expenditures, meaning separate claims for fuel, servicing, and road tax are not permitted.
- Actual cost claims must be apportioned so you only claim the specific percentage used for business journeys.
- Accurate records, including detailed trip logs, must be kept regardless of which vehicle claim method you select.
Can I claim mileage and fuel both when self employed?
You cannot claim mileage and fuel together for a single vehicle because HMRC rules demand a single choice per vehicle.
The flat-rate mileage option is designed by HMRC to cover all the running costs of your vehicle, including fuel. If you choose to claim the flat rate, you are already receiving an allowance for your fuel. Trying to claim actual fuel receipts on top of this rate represents double claiming, which is invalid.
This rule applies for the entire time you own and use that specific vehicle for your trade. You are permitted to use different methods for different vehicles, but any single vehicle is locked into its chosen method until it is sold or replaced.
What is the Simplified Expenses mileage rate method?
The simplified expenses mileage rate is a flat-rate deduction scheme based on business miles driven rather than individual receipts.
Under this system, you do not need to keep track of individual fuel receipts, repair bills, or insurance invoices. You simply record your business mileage and multiply it by the approved HMRC flat rates. This rate covers fuel, insurance, repairs, depreciation, and MOT tests.
| Vehicle Type | Standard Rate (Up to 10,000 miles) | Standard Rate (Over 10,000 miles) | New Rate (From 6 April 2026) |
|---|---|---|---|
| Car or goods vehicle | 45p per mile | 25p per mile | 55p per mile (Up to 10,000 miles) |
| Motorcycle | 24p per mile | 24p per mile | 24p per mile |
What is the actual costs method for vehicle expenses?
The actual costs method is a way of claiming tax relief by calculating and apportioning your real vehicle running expenses.
With this method, you must track every penny spent on running and maintaining your vehicle throughout the tax year. You can then claim tax relief on the business-use proportion of these expenses. For instance, if you drive 10,000 miles in total and 6,000 are for business, you claim 60 per cent of your total costs.
- Fuel costs and electricity for charging
- Vehicle insurance policies
- Servicing, maintenance, and emergency repairs
- Annual MOT test fees
- Road tax (Vehicle Excise Duty)
- Capital allowances on the purchase price of the vehicle
Why can't you mix mileage and actual expenses?
The restriction on mixing methods is legally enforced to prevent double tax deductions on the same vehicle assets.
According to the Income Tax (Trading and Other Income) Act 2005 (ITTOIA 2005) section 94D, once you use the mileage rate for a vehicle, no other deduction is allowed for that vehicle. This statutory rule applies for every future tax period in which the vehicle is used for your trade.
Furthermore, if you have claimed capital allowances under the Capital Allowances Act 2001 (CAA 2001) Part 2, the vehicle is legally classed as an "excluded vehicle". This status permanently prevents you from switching back to the simplified mileage rate method for that vehicle.
How to choose between mileage rates and actual costs
Choosing the best option depends on your annual business mileage, vehicle value, and the time you can dedicate to record-keeping.
If you drive a low-value, fuel-efficient vehicle over long business distances, the simplified mileage rate often yields a high deduction with very little paperwork. However, if you drive an expensive vehicle with high maintenance costs, or need to claim capital allowances, the actual costs method is usually more financially rewarding.
| Factor | Simplified Mileage Rate | Actual Costs Method |
|---|---|---|
| Admin Effort | Low (requires only a travel log) | High (requires saving all receipts and bills) |
| Tax Deductions | Fixed by HMRC rates | Variable, based on actual spending and business use |
| Purchase Price Relief | Built into the mileage rate | Claimed via capital allowances |
HMRC record-keeping and travel rules you must follow
Compliance with HMRC regulations requires keeping precise mileage records and understanding which journeys qualify for tax relief.
- Keep a structured mileage log showing the date of travel, starting point, destination, business purpose, and total miles.
- Ensure you do not claim for ordinary commuting, which is defined as travel between your home and a permanent workplace.
- Retain all relevant vehicle receipts and invoices for at least five years after the tax return deadline if using the actual costs method.
- Calculate the business percentage accurately by comparing your annual business mileage against your total annual mileage.
Can I use different vehicle claim methods for different cars in the same business?
Yes. HMRC allows you to use the simplified mileage rate for one business vehicle and the actual costs method for another. However, once you choose a method for a specific vehicle, you must stick with it for that vehicle.
Where is the HMRC simplified expenses checker tool?
The simplified expenses checker tool is available on the GOV.UK website. It allows self-employed individuals to input their business miles and actual costs to see which method provides the highest tax relief.
What happens to my mileage rate choice if I buy a new van?
Buying a new van resets your choice for that specific asset. Since it is a new vehicle, you can choose either the simplified mileage rate or the actual costs method, regardless of what you chose for your previous van.
Can I claim capital allowances if I am already using simplified mileage rates?
No. The simplified mileage rate incorporates depreciation and purchase costs. Under ITTOIA 2005, you cannot claim capital allowances on a vehicle if you are already using the simplified mileage method for it.