Auto Lease Calculator — Money Factor, Residual Value & True Monthly Payment
The dealer transparency tool. Calculate your exact monthly lease payment using MSRP, negotiated cap cost, residual value, and money factor (or APR). Instantly convert between money factor and APR to see the real interest rate dealers are charging.
Lease Calculator
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The Formula
Lease payments have two components: the depreciation charge (how much vehicle value you consume) and the finance charge (interest on the average outstanding balance). The money factor is simply APRThe total yearly cost of borrowing, including interest and fees, expressed as a percentage of the loan amount. ÷ 2400 — dealers sometimes obscure this to make the rate harder to compare.
Variable Definitions
Money Factor
The lease interest rate expressed as a small decimal. Convert to APR by multiplying by 2400. A money factor of 0.00125 = 3.0% APR. Never accept a money factor without converting it to APR for comparison.
Residual Value
The manufacturer-set projected value of the vehicle at lease end, expressed as a % of MSRP. This is the single most important variable in determining your monthly payment. A higher residual means lower depreciation charges and lower payments. Always lease vehicles with high residual values.
Capitalized Cost & Reductions
The negotiated selling price adjusted for down payment, trade-in, and acquisition fee. Down payments and trade-ins reduce the cap cost but carry risk — if the car is totaled early, the insurance payout goes to the lessor and you lose that cash. Lower cap cost = lower monthly payment.
How to Use This Calculator
- 1
Enter the MSRP and the negotiated selling price (your cap cost).
- 2
Enter any down payment or trade-in value to reduce cap cost.
- 3
Select your lease term — 36 months is most common and typically yields the best residual values.
- 4
Enter the residual value percentage — ask the dealer for this number, it is set by the manufacturer.
- 5
Enter the money factor or APR. Ask the dealer for the money factor explicitly.
- 6
Add your local sales tax rate and acquisition fee.
- 7
Review the payment breakdown to see exactly how depreciation and finance charges combine.
Common Applications
- Evaluating monthly lease payments and total lease cost before visiting a dealership to negotiate terms
- Comparing money factor (APRThe total yearly cost of borrowing, including interest and fees, expressed as a percentage of the loan amount.) and residual value offers across different manufacturers and vehicle models
- Deciding whether to put money down on a lease or keep cash in hand, understanding the risk of losing the down payment if the car is totaled
Lease vs buy — lower monthly payments but no ownership equity in a lease
Understanding the Concept
Most consumers focus on the monthly payment and miss the two critical variables: the residual value and the money factor. The residual determines how much of the car you "use up" — a vehicle with a 60% residual vs. 50% residual at the same price can save $50–$100/month on a 36-month lease. The money factor is negotiable at some dealerships and can often be reduced with a strong credit score. Always multiply the money factor by 2400 to compare it to APRThe total yearly cost of borrowing, including interest and fees, expressed as a percentage of the loan amount. from other financing sources.
Frequently Asked Questions
Sources & References
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