Hi I run a business part time as also work full time. i do cash basis accounting and had to recently buy a new used car. In my main job, i now work from home and will only go into the office 1 day a week moving forward. i work for myself most nights, all friday and saturday. What % of the car purchase price can i put through my books this year? i paid £14000 for it and recently after 1 year on finance, paid it off.