The residual value is the estimated value of what the car will be worth at the end of a lease. The higher this value is, the less your lease will cost you. This means that the best cars to lease are models that hold their value better over time. Many lease contracts are three years and the average residual value over that time is 50%, while the maximum is around 64%.
Just like buying a car, leasing a car includes fees. These will include things like an acquisition fee, disposition fee, and security deposit. The fees will vary depending on the leasing company, but most can be negotiated.