Car Lease Calculator — See the True Cost Before You Sign

What a car lease calculator should include

A useful lease calculator goes beyond the advertised payment. It should account for the amount due at signing, acquisition and admin fees, the length of the term, your kilometre allowance versus how much you actually drive, the excess-kilometre rate, and end-of-lease charges such as the disposition fee. Anything less shows you a payment, not a cost.

Advertised payment vs effective monthly cost

Dealers advertise the monthly payment because it's the smallest-looking number in the deal. Your effective monthly cost spreads everything you pay upfront across the term and adds it to that payment. A $499/month lease with $4,800 due at signing over 36 months really costs about $632 per month — a 27% difference that never appears in the ad.

Why due-at-signing changes the real monthly cost

Money due at signing is real money you pay on day one, but it's excluded from the headline payment. It often bundles a down payment, first month, taxes, freight, admin and registration. Ask the dealer to itemize exactly what it covers — some components are negotiable, and most are non-refundable if the lease ends early.

Common lease fees to look for

• Acquisition or admin fee — charged upfront to set up the lease.
• Disposition fee — charged at return to cover inspection and resale.
• Excess-kilometre charges — per-kilometre penalties above your allowance.
• Excess wear-and-tear charges — assessed against the lessor's standard at return.
• Early-termination costs — often the most expensive clause in the agreement.

Excess kilometre charges

Most Canadian leases include 16,000–24,000 kilometres per year. If you drive more, you'll pay a per-kilometre rate at return — commonly $0.10 to $0.25. Driving 4,000 km over allowance per year on a 36-month lease at $0.20/km adds roughly $2,400 at lease end. Pre-purchasing extra kilometres upfront is often cheaper than the overage rate; ask before signing.

End of lease: disposition, wear-and-tear and buyout

When the lease ends you can return the vehicle, buy it out at the residual amount, or lease again. Returning usually triggers the disposition fee and a wear-and-tear inspection. Buying out means paying the residual plus taxes — worth comparing against the vehicle's market value at that point. Knowing these numbers before you sign puts you in control of the exit.

Frequently asked questions

Is the advertised monthly payment the real cost of a lease?

Usually not. Money due at signing, acquisition and admin fees, and end-of-lease charges all add to the real cost. Dividing the upfront amount across the term gives your effective monthly cost — often meaningfully higher than the advertised payment.

How do I calculate the effective monthly cost of a car lease?

Add the amount due at signing to any upfront fees, divide by the number of months in the term, and add the result to the advertised monthly payment. This calculator does that math for you and shows the gap between advertised and effective cost.

What happens if I drive more than my kilometre allowance?

Most Canadian leases charge a per-kilometre overage rate at return, typically between $0.10 and $0.25 per kilometre. Multiply your expected annual overage by the term (in years) and the rate to estimate your exposure.

What is a disposition fee?

A fee many lessors charge at the end of the lease to cover inspection and resale preparation, often $300–$500. It is sometimes waived if you lease or buy another vehicle from the same brand — ask before you sign.

Does this calculator review my actual lease agreement?

No. It produces a preliminary estimate from the numbers you enter. For a full review of the clauses, fees and risks in your actual agreement, see our car lease agreement review.