They may not be able to completely afford the monthly payments, so they offer the sub lease to to cover the payments and then some. This can be more expensive than leasing from a dealership, but many consumers choose it if they don't have the best of credit. With the sub-lease, they give a lease for a car that they own. It works for and it works for them, but make sure it works for the dealership before begin leasing. The other forms of private car leasing involve either taking over a lease that is transferred to by someone else, or swapping a lease with someone who can afford it, while giving their cheaper lease.