For example if you drive 12,000 business miles a year in your own car or van then the approved amount you can claim is £5,000 (10,000 miles @45p per mile + 2,000 miles @25p per mile).
You also get another 5p per mile for each passenger on a business journey with you.
For those of you in the Xero world we also recommend the Tripcatcher app, it’ll help keep your trip log up to date and make sure you don’t miss a trick.