A car lease payment looks mysterious because it is built unlike a loan payment: you finance the car's depreciation plus a finance charge on the whole vehicle, never owning the equity. This calculator breaks the payment into its three real components — depreciation fee, finance fee, and tax — and totals the true cost of the lease term.
How a Lease Payment Is Built
Step 1 — Net capitalized cost: the negotiated price minus what you put in upfront:
Net cap cost=Price−(Down payment+Trade-in)
Step 2 — Residual value: what the lender says the car will be worth at lease end, as a percentage of price. This is set by the lender and is not negotiable:
Residual amount=Price×Residual %
Step 3 — Depreciation fee: the value you consume, spread over the term:
Depreciation fee=Term (months)Net cap cost−Residual amount
Step 4 — Finance fee: interest, quoted as a money factor (APR ÷ 2400) and — the part that surprises everyone — charged on cap cost plus residual, because the lender's money is tied up in the entire car for the whole term:
Finance fee=(Net cap cost+Residual amount)×2400APR
Step 5 — Tax: in most US states, sales tax applies to the monthly payment (not the full price, a genuine lease advantage): payment = (depreciation + finance) × (1 + tax rate).
Worked Example
A 30,000∗∗car,∗∗3,000 down, no trade-in, 36 months, 50% residual, 6% APR, 8% tax:
| Component | Amount |
| --- | --- |
| Net cap cost | 27,000∣∣Residualamount∣15,000 |
| Depreciation fee | 333.33/mo∣∣Financefee(moneyfactor0.0025)∣105.00/mo |
| Pre-tax payment | 438.33/mo∣∣Tax∣35.07/mo |
| Total monthly payment | **473.40∗∗∣∣Totalofpayments∣17,042.40 |
| Total out of pocket (payments + down) | $20,042.40 |
Read the finance fee line again: 105amonthonacarwhose∗loan−equivalent∗balanceaveragesfarless—becausethechargeappliesto42,000 of combined cap-plus-residual, not to a declining balance. That is why a low money factor matters as much as a low price in a lease, and why dealers prefer quoting the factor (0.0025 looks tiny) rather than its APR equivalent (6%).
Negotiating and Judging a Lease
Negotiate the price exactly as if buying — every 1,000offthecapcostcutsthedepreciationfeedollar−for−dollaracrosstheterm.The∗∗residual∗∗cannotbenegotiated,butchoosingamodelwithahighresidual(slow−depreciatingcarsleasecheaply)isthesameleverpulledearlier.The∗∗moneyfactor∗∗canbemarkedupbydealers;askforthebuyrate,andconvertanythingquotedwith×2400tocompareagainstloanAPRs.Whatthiscalculatordeliberatelydoesnotmodel,andyourcontractwillcontain:∗∗mileagelimits∗∗(typically10,000–15,000miles/yearwithper−mileexcesscharges),acquisitionanddispositionfees,excesswearcharges,andearly−terminationpenalties—readthosebeforesigning,becausetheyarewhereleasesurpriseslive.Finally,comparehonestlyagainstbuying:thecalculator′stotaloutofpocket(20,042 here) buys you three years of use and no asset; a purchase's higher outlay leaves you owning a car worth roughly its residual. Leasing wins for drivers who value new cars, warranty coverage, and lower payments; buying wins on long-run cost for those who keep cars.
Frequently Asked Questions
Why is tax charged on the payment instead of the car?
In most states, you are taxed on the portion of the car's value you use — collected monthly on the payment. A few states (notably Texas and Illinois historically) tax the full price upfront, which changes the math materially; this calculator applies the monthly-payment method, so check your state's rule.
Is a bigger down payment wise on a lease?
Usually less so than on a loan. It lowers the payment by prepaying depreciation, but if the car is stolen or totaled early, gap settlement pays the lease balance — your upfront cash is generally not recovered. Many lease advisors recommend minimal upfront money for exactly this reason; run the calculator both ways and see the payment difference before deciding.
What happens at the end of the lease?
You return the car (owing any excess mileage or wear charges and usually a disposition fee), or buy it at the residual amount — attractive when the market value exceeds the residual, as happened widely when used-car prices spiked. The residual in your contract is the buyout price basis; compare it with market prices a few months before term end.