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Auto Lease Calculator
Lease payments hide their math. This auto lease calculator splits yours into depreciation and finance charges, converts the money factor to APR as you type, and folds in a down payment or trade-in to show the residual buyout and total lease cost.
See how this works on a $40,000 lease — 3 real examples
Monthly lease payment (with tax)
$0
Base payment
$0
Depreciation fee
$0
Finance (rent) fee
$0
Effective APR
—
Residual / buyout at end
$0
Due at signing
$0
Total lease cost
$0
Lease cost breakdownLine-item math and month-by-month cost
How the payment is built
| Capitalized cost | $0 |
| Cap cost reduction (down) | $0 |
| Adjusted cap cost | $0 |
| Residual value | $0 |
| Money factor (= APR) | — |
| Depreciation fee / mo | $0 |
| Finance (rent) fee / mo | $0 |
| Base payment / mo | $0 |
| Sales tax / mo | $0 |
| Monthly payment | $0 |
Cumulative cost by month
| # | Date | Payment | Cumulative |
|---|
How your auto lease payment is calculated
A lease payment is the depreciation you use up plus a rent charge on the money tied up in the car, with sales tax added on the payment:
money factor = APR / 2400 (APR = money factor × 2400)
depreciation fee = (cap cost − down − residual) / term
finance fee = (cap cost − down + residual) × money factor
base payment = depreciation fee + finance fee
monthly = base payment × (1 + tax%)
The residual value is the expected end-of-lease worth; enter it as a percent of price or as dollars, and it doubles as your buyout price. The money factor is just an interest rate in disguise — this tool converts it to and from an APR exactly (money factor × 2400), so you can enter whichever number the dealer quotes. A down payment here is a cap cost reduction: it lowers both the depreciation base and the finance base, so it reduces every component of the payment. Total lease cost is your down payment plus every monthly payment; it does not include the buyout unless you choose to purchase the car at the end. Sales tax is applied to the monthly payment, which is how most US states handle a lease — enter your own rate, since BedrockCalc keeps no 50-state tax tables.
Same car, three credit scores
A $40,000 car, 58% residual, 36 months, $3,000 down. The only thing that changes here is the money factor the dealer quotes.
Strong credit: a 0.00125 money factor
per month$490.68
- Multiply 0.00125 by 2400 and the tiny decimal turns out to mean 3% APR.
- The finance fee is $75.25 a month; depreciation, at $383.33, is unchanged in all three scenarios.
- Three years cost $20,665 in all — down payment included, buyout not.
The decimal looks harmless either way; 2400 times bigger is the number to judge it by.
Load this example (opens in a new tab)The middle quote: 0.00250, or 6% APR
per month$571.20
- Doubling the money factor doubles the finance fee exactly: $150.50 a month instead of $75.25.
- The car depreciates the same $383.33 a month no matter what rate is attached.
- Each month runs $80.52 more than the 3% version; the lease totals $23,563.
One tier down the rate sheet, and the rent on the money has quietly doubled.
Load this example (opens in a new tab)The high quote: 0.00375, or 9% APR
per month$651.72
- The finance fee reaches $225.75 a month, three times the strong-credit charge.
- Total lease cost climbs to $26,462 — $5,797 above the 3% version, for the identical car.
- The dealer never has to say 9%; the quote arrives as 0.00375.
Every 0.00125 of money factor is three points of APR and about $80 a month on this car.
Load this example (opens in a new tab)Illustrations only, not financial advice. Your own rate, taxes and insurance will differ — check with a qualified financial advisor before acting on any of this.
Auto lease basics, in plain English
- Two parts to every payment. Depreciation covers the value the car loses; the finance (rent) fee is interest on the cap cost and residual combined.
- Money factor is a hidden APR. Multiply it by 2400 — 0.00250 means 6%. If a dealer won’t quote the APR, do the math yourself and shop it.
- Residual is the biggest lever. A higher residual means less depreciation and a lower payment, and it’s your buyout price at the end. Used cars lease at lower residuals, so run those numbers too.
- Think twice about money down. A lease down payment lowers the monthly but builds no equity and is usually lost if the car is totaled early.
- Negotiate the cap cost, not the payment. Dealers can hit any monthly by stretching the term or hiding the money factor — anchor on the selling price.
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Frequently asked questions
How is a monthly lease payment calculated?
A lease payment has two parts. The depreciation fee spreads the value the car loses over the lease — (cap cost − down − residual) ÷ term in months. The finance (rent) fee is (cap cost − down + residual) × money factor. Add them for the base payment, then add sales tax on that payment. On a $40,000 car with 58% residual, a 0.00250 money factor, 36 months and $3,000 down, that is $383.33 depreciation + $150.50 rent = $533.83, or about $571 a month with 7% tax.
What is a money factor and how do I convert it to an APR?
The money factor is the lease version of an interest rate, written as a small decimal like 0.00250. Multiply it by 2400 to get the equivalent APR, and divide an APR by 2400 to get the money factor — so 0.00250 is a 6% APR and a 6% APR is 0.00250. The rate a dealer offers usually tracks your credit score, so a stronger score earns a lower money factor. This calculator does the conversion live, so you can type whichever number the dealer quotes and instantly see the other.
What is residual value and how does it affect my payment?
Residual value is what the leasing company expects the car to be worth at the end of the lease, usually quoted as a percent of MSRP (commonly 45–60% for 36 months). A higher residual means the car depreciates less while you have it, so your depreciation fee — and your monthly payment — go down. The residual is also your buyout price if you choose to purchase the car at lease end.
What is capitalized cost (and cap cost reduction)?
Capitalized cost, or cap cost, is the agreed price of the vehicle being leased — the negotiated selling price plus any fees rolled in. A cap cost reduction is anything that lowers it up front: a cash down payment, a trade-in, or a manufacturer rebate. In this calculator the down-payment field acts as your cap cost reduction, lowering both the depreciation and the finance portions of the payment. Negative equity works the other way — if you roll an old loan balance into the lease it raises the cap cost, so add it to the vehicle price rather than the down payment.
Should I make a down payment on a lease?
Often not. Money down on a lease lowers the monthly payment but buys you no equity, and if the car is totaled or stolen early, that up-front cash is usually gone — gap coverage only pays off the lease balance, not your down payment. Many shoppers put little or nothing down and pay a slightly higher monthly instead. Try both in the calculator to see the trade-off.
Is lease sales tax charged on the whole car or just the payment?
In most US states you pay sales tax on each monthly lease payment rather than on the full value of the car, which is one reason leasing can feel cheaper up front than buying. A few states tax the full or capitalized cost at signing instead. This calculator applies your entered rate to the monthly payment (the common method); enter 0% if your situation is different.
Disclaimer: these calculators are educational tools, not financial advice. They model your inputs with published formulas, but they cannot know your full situation — for decisions with real stakes, talk to a qualified professional. Formulas and defaults last reviewed .