I know it's sort of a personal question, but I would like to know how much percentage people spend on average on their cars compared to their salaries. Ask yourself this, how much did you buy your car for the first time you bought your car? And what was your annual salary then during that year you bought your car? Take those figures and work out the percentage of your current car's value the first time you bought it compared to the annual salary you received during that year (100%).