Car Lease Calculator computes estimated monthly payments using vehicle price, down payment, trade-in value, lease term, interest rate, and residual value, including sales tax.
Calculate Monthly Payment on a New Vehicle Lease Using Cap Cost and Residual Value
This calculator turns a vehicle’s MSRP, negotiated price, down payment, trade-in value, fees, residual value, APR, and lease term into an estimated monthly lease payment split into depreciation, finance charge, and tax. It’s used by shoppers comparing a lease against buying, comparing lease offers across dealers, or checking whether a dealer’s quoted payment lines up with the underlying numbers.
Entering Your Vehicle Price, Residual Value, and Lease Term
Enter MSRP and negotiated price separately, since residual value is calculated from MSRP while depreciation is calculated from the negotiated price. Add down payment, trade-in, and fees, then set the lease term in months, the APR, the residual as a percentage of MSRP, and the sales tax rate. Output splits the payment into depreciation, rent charge, and tax.
How Depreciation, Rent Charge, and Tax Combine Into a Lease Payment
Every lease payment is built from three pieces: the vehicle’s depreciation over the term, a finance charge on the money you’re borrowing, and tax.
$$Net\ Cap\ Cost = (Price + Fees) – (Down + Trade{\text -}In)$$
$$Residual\ Value = MSRP \times r_{resid}$$
$$Depreciation_{mo} = \dfrac{Net\ Cap\ Cost – Residual\ Value}{n}$$
$$Rent\ Charge_{mo} = (Net\ Cap\ Cost + Residual\ Value) \times MF$$
$$Payment_{mo} = (Depreciation_{mo} + Rent\ Charge_{mo}) \times (1 + r_{tax})$$
Here $n$ is the lease term in months, $r_{resid}$ is the residual percentage, $r_{tax}$ is the sales tax rate, and $MF$ is the money factor. This three-part structure — depreciation, rent charge, and tax — is the standard auto-lease payment formula used industry-wide, as published by consumer finance sites including Edmunds and Calculator.net.
It isn’t a coincidence that the terminology matches federal paperwork: gross capitalized cost, capitalized cost reduction, adjusted (net) capitalized cost, residual value, depreciation, and rent charge are the exact line items Regulation M — the Federal Reserve’s rule implementing the Consumer Leasing Act — requires lessors to disclose on a motor vehicle lease.
The money factor itself is calculated as $$MF = \dfrac{APR}{2400}$$ — a widely-used leasing-industry conversion (documented across consumer auto-finance sources) for turning an annual rate into the small decimal dealers quote, not a statute or IRS/Fed-published formula.
Treat it as an industry convention: the rent charge it produces is a simple, average-balance approximation of interest — calculated once per month on the average of the net cap cost and residual value — rather than a compound monthly rate applied to a declining balance the way an auto loan works, so a lease and a loan at the “same rate” are not computed the same way.
A detail worth knowing: while Regulation M requires disclosure of the rent charge dollar amount, it does not require a lessor to disclose the money factor decimal that produced it, and if a lessor voluntarily states a percentage rate on lease paperwork, federal rules bar them from calling it an “annual percentage rate.” So the “Interest Rate (APR)” figure you enter here is this calculator’s own conversion for estimation purposes — a real lease offer may never show you that number directly.
A common input mistake is entering a dealer-quoted money factor (a small decimal like 0.0025) directly into the Interest Rate field instead of converting it to a percentage first (0.0025 × 2400 = 6.0%); entering the decimal as-is produces a near-zero finance charge. Two others to watch for:
- Entering Residual Value as a dollar figure instead of a percentage of MSRP — the field expects a number like 55, not 22000.
- Confusing MSRP with Negotiated Price: residual value is always calculated from MSRP regardless of what you negotiate, so swapping the two fields misstates both figures.
MSRP, Negotiated Price, and Lease Term must be greater than zero, and Residual Value must be entered as a percentage greater than zero; down payment, trade-in, fees, interest rate, and tax rate all accept zero.
Residual Value isn’t capped at a realistic ceiling by the calculator — industry lease guides generally put it in the 35–65% range for a 36-month term — so an unrealistically high entry will still compute a result; if the residual value exceeds the net capitalized cost, monthly depreciation floors at $0, leaving a payment made up of rent charge and tax alone, which no real lease actually offers.
If your down payment and trade-in together exceed the price plus fees, net capitalized cost floors at $0 too, but the rent charge doesn’t disappear with it, since it’s based on the average of net cap cost and residual value — you can still see a nonzero payment even with a “fully covered” cap cost.
Because money factors, residual values, and fees vary by manufacturer, lender, and region, and because negotiated price and fees are themselves negotiable, treat this output as an educational estimate of how a lease is structured — not a specific lease quote, and not tax, legal, or financial advice.
Sales tax treatment of leases also varies by state: this calculator applies tax monthly, to the depreciation-plus-rent-charge payment, which is one of the two common state approaches — other states instead tax the full capitalized cost upfront. Confirm which method your state uses before treating the tax figure as final.
How a Sample Monthly Lease Payment Splits Into Its Three Parts
Answers to Common Car Lease Payment Questions
Why do I need both an MSRP and a Negotiated Price field?
Residual value is always calculated as a percentage of MSRP, regardless of what you negotiate, while depreciation is calculated from the negotiated price. Entering the same number in both fields understates how much negotiating the price actually saves you.
What is a money factor, and why does it matter here?
A money factor is the lease industry’s way of expressing a financing rate as a small decimal instead of a percentage. This calculator converts your entered APR into a money factor (APR ÷ 2400) internally to compute the rent charge.
Will my actual lease paperwork show me the money factor?
Not necessarily. Regulation M requires lessors to disclose the dollar rent charge but not the money factor decimal behind it, and lessors that voluntarily quote a rate can’t legally call it an “annual percentage rate.”
Why does my payment include a charge even after a large down payment?
The rent charge is calculated on the average of the net capitalized cost and the residual value, not on the capitalized cost alone, so a large down payment reduces it but a nonzero rent charge can remain even if the cap cost is fully offset.
Does every state tax a lease the same way?
No. This calculator taxes the monthly payment, which is common, but some states instead tax the full capitalized cost upfront at signing. Confirm the method used in your state before relying on the tax estimate shown here.