Excess mileage calculator

Enter the mileage your agreement allows, the mileage at return and your pence-per-mile rate. The calculator shows the charge your agreement supports, so you can compare it with the bill.

The sum it uses

Miles allowed = allowed miles a year × months ÷ 12. Excess miles = mileage at return − mileage at delivery − miles allowed. Charge = excess miles × pence a mile ÷ 100.

If your agreement quotes the rate without VAT and you are charged VAT, add 20%. If you changed the allowance or extended the agreement part way through, use the revised figures.

If the bill is higher

Ask the company to show its calculation in writing, including the delivery mileage and the allowance it used. See how excess mileage charges are worked out and how to dispute a bill.