When you return your lease car to a funder, the collection driver will check and make a note of the mileage on the odometer. The funder will then calculate the mileage driven during the contract against your contracted allowed mileage. If you have driven more miles then the contracted mileage, then the funder will charge you an excess mileage charge. Depending on the lease company/funder, this can range between 3p and £2.75 plus VAT per mile, depending on the car, length of contract, etc. Some funders have stepped excess mileage, where the rate will increase the more miles you ave done. For instance one funder states in their contract that should your mileage be 10% over the contracted mileage, the excess mileage rate will increase by 50%. Some also have terms written into the contract that should the excess mileage amount be a substancial amount, then you maybe forced to purchase the car, as the car is deemed unsellable via their usual channels.