So if you're making $50,000 a year, you buy a car that's less than $25,000. However, since cars are a depreciating asset, the less you pay for a car, the better. But based on the less-than-half-your-salary rule, to buy a Lamborghini (without all the bells and whistles) you need to be making… $480,000 a year.30 Jan 2017