A car dealer's income depends on how much commission he receives, which is the difference between the vehicle's selling price and the vehicle's invoice price. A majority of car dealers make anywhere from 25 to 30 percent commission of the total profit.
Many car dealers are willing to accept deals made with a low profit margin. As a trade off, a dealer makes a minimum commission, which is usually a hundred dollars. In addition to a regular commission, a car dealer can also make a bonus every month if he sells a specific number of cars. Dealers can also make extra money by selling a specific model of vehicle or selling a specific number of vehicles over the weekend.