Guaranteed auto protection (GAP) insurance is required by most lease contracts, and it can help cover the difference between the car's market value and the amount owed to the leasing company if the car is written off or stolen. However, keep in mind that even with GAP insurance, there may be limits to the amount of protection provided. For example, Progressive—which calls this kind of protection loan/lease payoff coverage—limits its coverage in this area to 25 percent of the actual cash value of the vehicle at the time of the loss, and this may not be enough to fully reimburse you for a large down payment. Your best bet is to minimize your risk by minimizing your down payment.