Couple months prior to the end of the lease, the leasing company will contact you and give you an opportunity to purchase the car at a discount or enter in to another lease with the current car or another vehicle. If you choose to lease another car with them, they will usually let you get out of your lease early. Or you can choose to do nothing, just return the car and walk away. But you will be responsible for extra charges for damages beyond normal wear & tear and for any extra mileage. So if you plan to return it, you better fix every dent, scratches, etc. But if the damages and extra mileage will cost astronomical, then it would be better to buy the car and then sell it yourself.