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If you use your own car for business, you may be able to claim a proportion of the actual total cost of buying and running your vehicle, including such things as insurance, repairs, servicing, fuel, etc. However, keeping track of every cost and working out the exact proportion of business use for your vehicle takes time and effort.

Instead, many self-employed people claim mileage allowance, a flat-rate scheme that provides a much simpler way to claim back the cost of using your own vehicle for business. Mileage allowance is part of a range of “simplified expenses” options that HMRC offers to self-employed people. They’re designed to make tax admin easier and quicker.

How much mileage allowance can you claim?

If you’re self-employed, you can claim a mileage allowance of:

• 45p per business mile travelled in a car or van for the first 10,000 miles and
• 25p per business mile thereafter
• 24p a mile if you use your motorbike for business journeys.

If you travel with someone else who also works for your business, as the driver, you can claim an additional 5p per mile for each extra passenger. So, if three of you travel together, you can claim 45p + 10p per mile (two x 5p per mile for the two additional passengers) for the first 10,000 miles, then 25p + 10p per mile thereafter.

Need to know! Claiming mileage allowance doesn’t stop you claiming for other business travel expenses, such as train tickets and taxi rides. Parking tickets and toll fees while on business can also be claimed as a legitimate business expense.

When can’t mileage allowance be claimed?

You can’t claim mileage allowance for personal journeys, they must be made “wholly and exclusively for business purposes”. And neither can you claim mileage allowance for journeys to and from your usual place of work (ie your commercial business premises). You can claim for travel to a temporary workplace, for example, if you’re a plasterer who needs to travel to different sites and jobs.

Need to know! You cannot claim simplified expenses for a vehicle you’ve already claimed capital allowances for or one you’ve included as an expense when you worked out your business profits. Where necessary, seek guidance from an accountant.

Working out your business mileage

Logging your business mileage is a good idea, as it can make it far easier to later work out and claim your mileage allowance. And your claim is more likely to be accurate and credible if HMRC can see precise details of dates, miles travelled, journeys and reasons. HMRC can request proof during an investigation.

Manually recording your business mileage takes more time and effort, while scraps of paper and notebooks can go missing, so it’s better to record and store your mileage details in a spreadsheet/software, with data stored safely online. Many apps have been created to help business owners track and record their business travel mileage (some even use GPS to automatically measure business mileage).

Some self-employed business owners simply estimate their business mileage, by claiming for a percentage of their vehicle’s total annual mileage. So, if your car does 1,000 miles a month and you can show that half of that is for business use, you can claim mileage allowance of 6,000 miles a year (ie £2,700).

How to claim mileage allowance

Good accounting software will do all of the hard work for you, saving you lots of time and hassle. You enter your business mileage and it calculates your mileage allowance, which you enter into your Self-Assessment tax return. The amount is taken into account and your tax liability is reduced as a result.

If you use simplified expenses to claim mileage allowance, you cannot claim for motoring costs such as insurance, road tax or fuel, because these are accounted for within the mileage allowance.

Need to know! Deliberately inflating your mileage allowance claim can lead to penalties. HMRC takes a very dim view of anyone who deliberately enters false information into tax returns.

Further reading

Visit government website Gov.uk to read Travel – mileage and fuel rates and allowances. There is also an online tool that enables you to Check if simplified expenses could save your business money.

About GoSimpleTax

Income, Expenses and tax submission all in one. GoSimpleTax will provide you with tips that could save you money on allowances and expenses you might have missed.

The software submits directly to HMRC and is the solution for the self-employed, sole traders and anyone with income outside of PAYE to file their self-assessment giving hints and tips on savings along the way. GoSimpleTax does all the calculations for you so there is no need for an accountant. Available on desktop or mobile application.