# Lease Mileage Calculator

URL: https://speedycalculator.com/calculators/finance/lease-mileage/
Last updated: 2026-10-25

> The lease mileage calculator checks whether you'll go over your car lease mileage allowance – projecting your end-of-lease mileage from the miles driven so far – and the excess mileage charge you'd pay, plus the monthly miles left.

## Inputs

- Lease length (months)
- Months elapsed
- Miles driven so far (mi)
- Annual mileage allowance (mi)
- Excess mileage fee per mile

## Results

- Total allowed miles
- Projected miles at lease end
- Projected excess miles
- Projected excess mileage charge
- Miles left per month to stay within the allowance

## Formula

```
Allowed miles = annual allowance × lease months ÷ 12
Projected miles = miles driven ÷ months elapsed × lease months
Excess charge = max(projected − allowed, 0) × fee per mile
```

## Explanation

Typical leases allow 10,000–15,000 miles a year and charge $0.15–$0.30 for each extra mile. Buying extra miles upfront is usually cheaper than paying at the end.

### How to use the Lease Mileage Calculator

- **Lease length**
- **Months elapsed**
- **Miles driven so far**
- **Annual mileage allowance**
- **Excess mileage fee per mile**

Results update as you type, and every field accepts the units shown in its menu.

### How it works

Enter the lease length, months elapsed, the current odometer reading (miles driven on the lease), the yearly allowance and the excess mileage fee.

### Tips

- Compare loans by APR and total cost, not just the monthly payment.
- Extra payments go straight to principal and can save a lot of interest.
- Pay off the highest-rate debt first if you want to save the most money.
- Check for prepayment penalties before paying a loan off early.

### Common mistakes to avoid

- Stretching a loan term to lower the payment without seeing the extra interest.
- Paying only the minimum on credit cards.
- Forgetting fees that are rolled into the loan.

### Inputs explained

FieldWhat to enterLease lengthIn monthsMonths elapsedA numberMiles driven so farIn miAnnual mileage allowanceIn miExcess mileage fee per mileAmount in your currency

### What each result means

- **Total allowed miles** = [Annual mileage allowance]×[Lease length]÷12
- **Projected miles at lease end** = [Miles driven so far]÷[Months elapsed]×[Lease length]
- **Projected excess miles** = max([Projected miles at lease end] - [Total allowed miles], 0)
- **Projected excess mileage charge** = [Projected excess miles]×[Excess mileage fee per mile]
- **Miles left per month to stay within the allowance** = max(([Total allowed miles] - [Miles driven so far])÷([Lease length] - [Months elapsed]), 0)

### Example values

How the main result changes when **Lease length** changes and everything else stays at the example values above:

Lease length (months)Projected excess mileage charge18803.57271,205.36361,607.14452,008.93542,410.71723,214.29

## Worked example

Inputs — Lease length: 36 months; Months elapsed: 14; Miles driven so far: 16,500 mi; Annual mileage allowance: 12,000 mi; Excess mileage fee per mile: $0.25.

Results — Total allowed miles = 36,000; Projected miles at lease end = 42,429; Projected excess miles = 6,429; **Projected excess mileage charge = $1,607.14**; Miles left per month to stay within the allowance = 886.

## FAQ

**What happens if I go over my lease miles?**
You pay a per-mile fee, usually $0.15–$0.30, when you return the car.

**Can I buy extra miles?**
Often yes, at a lower rate if bought at signing.

**Does buying the car at the end avoid mileage fees?**
Yes – excess mileage charges apply only if you return it.

**What formula does the Lease Mileage Calculator use?**
Allowed miles = annual allowance × lease months ÷ 12.