I agree with matt, also it is not profit I seek , it is adding value to my businesses, I ACTUALLY TRY TO MINIMISE MY NET PROFIT BY OFF SETTING,as much of my expenditure as possible, against my business, if i worked at tesco, and my car cost 4k a year in depreciation, repairs,fuel etc i would need to earn about 6k to have the 4k in my pocket , as it is my business pays the 4 k , so that is 2k saved , multiply that by several out goings and , lower your net profit , and your tax bill ... legally.