Rebates and incentive cash are offered by manufacturers to stimulate sales. These offers are advertised on TV, and you can also see current offers on manufacturer websites. There’s loyalty cash, competitor switching cash, military and first responder cash, college student cash, and more. Do your research because dealers won’t always tell you about all of the incentives.
There are different cash incentives offered for buying vs. leasing so The BOSS provides separate inputs. If you don’t know the incentives, leave these inputs blank. But do your research and come back later to enter the cash incentives.