Calculate excess mileage charges and total cost for your UK car lease
Car leasing in the UK comes with a mileage allowance that most drivers underestimate the importance of. Whether you have a Personal Contract Hire (PCH) or a business contract hire (BCH), your agreement specifies an annual mileage limit -- typically 5,000 to 25,000 miles per year. Exceed this allowance and you face excess mileage charges that can add hundreds or even thousands of pounds to your final bill when you return the vehicle. Excess mileage charges in the UK typically range from 3p to 15p per mile, with most mainstream brands charging between 6p and 10p per mile. On the surface, these figures seem modest, but they compound quickly over a multi-year lease. A driver who exceeds their 10,000-mile annual allowance by just 2,000 miles per year on a 36-month lease will rack up 6,000 excess miles, costing GBP 480 at 8p per mile or GBP 900 at 15p per mile. This calculator helps you estimate your excess mileage exposure before you sign a lease agreement or during your existing contract. It also compares the cost of excess charges against upgrading to a higher mileage package, which is almost always cheaper if you know you will exceed your current limit. Many leasing companies charge just GBP 10 to GBP 20 more per month for the next mileage tier up, which over 36 months totals GBP 360 to GBP 720 -- often less than the excess charges you would face. Understanding your true annual mileage is essential before committing to a lease. The average UK driver covers around 7,400 miles per year, but this varies enormously depending on commute distance, lifestyle, and whether the car is used for business travel.
To calculate your lease mileage costs: 1. Select your annual mileage allowance. This is the mileage tier agreed in your lease contract. Common options are 5,000, 8,000, 10,000, 15,000, 20,000, or 25,000 miles per year. Check your lease agreement if you are unsure. 2. Enter your expected annual mileage. Be realistic -- check your car's odometer or use your daily commute distance as a guide. A 20-mile round-trip commute five days a week adds up to roughly 5,200 miles per year before you account for weekends, holidays, and other journeys. 3. Select your lease term. Most UK car leases run for 24, 36, or 48 months. Longer terms mean more total miles and potentially larger excess charges if you are over your allowance. 4. Enter the excess mileage charge in pence per mile. This is stated in your lease agreement. If you are shopping for a new lease, ask the provider for this figure. 5. Enter your monthly payment. This allows the calculator to work out the total cost of your lease including any excess charges and the cost per mile. 6. Review the results. The calculator shows total allowed miles, total expected miles, any excess, the excess charge in pounds, your total lease cost, and cost per mile. It also estimates how much you could save by upgrading to a higher mileage package instead of paying excess charges. 7. If the potential saving from a higher mileage package is positive, contact your leasing company about upgrading your allowance -- it will be cheaper than paying per-mile excess charges.
The lease mileage calculation is straightforward but important to get right because the charges apply at the end of the lease when many drivers are caught off guard. **Total allowed miles** = annual mileage allowance x (lease term in months / 12) For example, a 10,000-mile annual allowance on a 36-month lease gives a total allowance of 10,000 x 3 = 30,000 miles over the full term. **Total expected miles** = expected annual mileage x (lease term in months / 12) If you expect to drive 12,000 miles per year over 36 months, your total expected mileage is 12,000 x 3 = 36,000 miles. **Excess miles** = maximum of zero or (total expected miles minus total allowed miles) In our example: 36,000 - 30,000 = 6,000 excess miles. If your expected mileage is within the allowance, excess miles is zero. **Excess mileage charge** = excess miles x (pence per mile / 100) At 8p per mile: 6,000 x 0.08 = GBP 480. This is the lump sum payable when you return the vehicle. **Total lease cost** = (monthly payment x lease term in months) + excess charge For a GBP 250 per month lease over 36 months with GBP 480 excess: (250 x 36) + 480 = GBP 9,480. **Cost per mile** = total lease cost / total expected miles GBP 9,480 / 36,000 = 26.3p per mile. This helps you compare the true running cost of leasing versus ownership. **Higher mileage package comparison:** The calculator estimates whether upgrading to the next mileage tier would save money. It assumes a typical cost of GBP 15 per month for a higher mileage package (this varies by provider). The extra cost over the full term is compared against the excess charge: Higher package extra cost = GBP 15 x lease term in months. Potential saving = excess charge minus higher package extra cost. If the saving is positive, it is cheaper to upgrade your mileage package than to pay excess charges at the end. For our example: GBP 15 x 36 = GBP 540 extra for a higher package, versus GBP 480 in excess charges. In this case the saving is zero because the excess charge is actually cheaper. But for larger excesses -- say 10,000 miles at 8p, costing GBP 800 -- the higher package at GBP 540 saves GBP 260.