Understand your lease payment.

You are paying for the depreciation, not the car

This is the idea everything else hangs on. You are not buying a $37,000 car and handing it back. You are paying for the value it loses while you have it. With $695 in acquisition fees and $2,000 down, the adjusted capitalized cost is $35,695. The bank expects the car to be worth $22,800 in three years, so the value that disappears on your watch is $12,895.

Spread that across 36 months and the depreciation fee is $358.19 a month. That single number is most of the payment, and it is why a car that holds its value is cheaper to lease than a car with the same sticker price that does not.

The money factor is an interest rate in disguise

Leases quote the cost of money as a money factor, a decimal like 0.00150, which is small enough to look like a rounding error. Multiply it by 2,400 and you get the approximate APR. Here that is 3.60%, and the page shows the conversion next to the field so the number cannot hide.

The finance charge is the part people get wrong. The money factor does not apply to what you still owe. It applies to the capitalized cost plus the residual: ($35,695 + $22,800) x 0.00150 = $87.74 a month. The sum is there because the leasing company has the entire value of the car tied up for the whole term, not just the part you are using up. Set the money factor to zero and the total cost of this lease falls from $19,177 to $15,798, so the borrowing alone is worth about $3,400.

Negotiate the price, because the residual will not move

The residual value is set by the leasing company as a percentage of MSRP, and it does not care what you actually paid. That has a useful consequence: negotiating the price down does not drag the residual down with it, so the whole discount lands on the depreciation you are financing.

Try it on the calculator. Drop the negotiated price from $37,000 to $34,000 and the residual stays at $22,800 while the total cost of the lease falls from $19,177 to $15,794. That is $3,383 saved on a $3,000 discount, because the smaller balance also carries a smaller finance charge. The price is negotiable. The residual and the money factor usually are not.

Money down on a lease is not a discount

A down payment on a lease, confusingly called a capitalized cost reduction, does not make the car cheaper. It prepays part of what you already owed. Raise the down payment here from $2,000 to $6,000 and the monthly payment drops from $477 to $352, which looks like a win until you check the total: it falls only from $19,177 to $18,666. You committed $4,000 up front to save $511.

There is a second reason to be careful. If the car is stolen or totaled in month two, the insurance settlement goes to the leasing company, which owns the car. Your down payment is not refunded, and without gap coverage you can owe money on a car you no longer have. A large down payment on a lease concentrates that risk for very little return.

What this calculator leaves out

It taxes the monthly payment, which is how most states handle leases, but not all. A few tax the full capitalized cost up front, and a couple tax the whole sale price of the vehicle, which changes the arithmetic enough that you should check your own state before treating any of these figures as a quote.

It also ignores what happens at the end. Real leases carry a disposition fee when you hand the car back, mileage charges once you pass the allowance, and wear-and-tear assessments that are as consistent as the person inspecting the car. Those are the costs that turn a good lease into an expensive one, and none of them show up in the monthly payment you agree to on day one.

Unfamiliar term? The course glossary defines the fifty this site actually uses, in the sense this site uses them.