Q. I'm self-employed. How do I work out what to claim for motoring expenses in my accounts?

A. You can calculate your business-related motoring costs by either:

a) Take the proportion of business miles to total mileage driven in your vehicle in the year and apply that proportion to your total motoring costs for the year; or
b) Use the fixed expense of 45p per business mile for the first 10,000 miles driven in the year and 25p per mile for additional business miles in the year.

If you use method a) you can also claim capital allowances on the cost of your vehicle, restricted for the private use of that vehicle. If you use method b) you can't claim capital allowances for your vehicle but you can claim the interest amount of any finance lease used to purchase the vehicle. We can explain exactly what you can and cannot claim in your accounts for tax purposes.