What is the early termination formula for a car lease?

Most leasing companies calculate early termination costs as: remaining payments owed, plus the difference between the car's current market value and the residual value (if the car is worth less), plus an early termination fee (typically $200 to $500), minus your security deposit if you paid one. The exact formula is in your lease contract under the early termination section. It is worth reading before making any decisions.