Lease contracts include an annual mileage limit because a car’s mileage affects its resale value. The mileage cap is usually 10,000 to 15,000 miles per year. Be sure to ask about the mileage cap as well as the cost-per-mile penalty for exceeding the annual limit. If you feel that the mileage cap is too low, you can usually negotiate a higher limit, but doing so will increase the cost of the lease.