A lease can be very difficult to exit early. Some will let you transfer the lease for a small fee, but the new owner has to have very high credit ratings. If you want to terminate the lease early you have a few options (this is what most companies do, but check your lease to be sure):
1. You can buy the car out, and trade it in to a dealer or sell it outright. The problem with this is that the payoff will probably me considerably more than the value of the car and, in may cases on leases that have just been started, may be more than the MSRP of the vehicle.
2. You can turn the car in: You will have to pay all the remaining payments (so if you are 6 months into a 36 month/$500 month lease you will need to write a check for $15000.00 when you turn it in. You can also turn the car in and they will sell it at auction and you can pay the difference between what the payoff would have been using option 1 and what they get for the car ( I highly suggest you avoid this option!)
In some cases they will consider this a voluntary repossesion (bad for your credit) so check with them first to be sure!!