If you’re a sole trader, you won’t really have a company car – you and your business are essentially one and the same, so the car will belong to you. Depending on how you use your car for work, you may not even need business car insurance – a regular policy could be enough. You’ll still be able to claim tax relief as a sole trader, which you can do either using the HMRC’s standard rate of 45p a mile for the first 10,000 miles and 25p thereafter, or you can work it out exactly.