TRAC Lease (Terminal Rental Adjustment Clause) provides a guaranteed purchase price for titled vehicles and/or trailers at the end of the lease term and complies with true lease requirements according to IRS rules. At the end of the lease term, you may either purchase the vehicle for a fixed price, or sell the vehicle to a third party. If you sell the vehicle to a third party, you retain any excess over the purchase option amount. However, if the vehicle is sold below the purchase option amount, then you are responsible for any difference between the sales price and the purchase option amount.