How this lease calculator works
This lease calculator turns the confusing language of a lease contract — capitalized cost, money factor, residual value — into a clear monthly payment and total cost. Unlike a loan, where you finance the entire price of the car, a lease only charges you for the portion of the vehicle's value you actually use during the term, plus a finance charge on the money the lender has tied up. That is why a car lease calculator and a loan calculator give such different monthly numbers for the same vehicle. Enter your MSRP, negotiated price, residual, money factor, and term, and the lease payment calculator updates instantly. Switch to lease vs buy mode and it runs a full side-by-side comparison, including equity, total cost after the term, and the exact break-even month where buying becomes the cheaper choice.
How it works / formula
A lease payment has three building blocks: a depreciation fee, a finance charge, and tax. The depreciation fee covers the value the car loses while you drive it:
Depreciation fee = (Cap cost − Residual value) ÷ Term
The finance charge (sometimes called the rent charge) is the interest equivalent. It is unusual because it multiplies the sum of the cap cost and the residual by the money factor:
Finance charge = (Cap cost + Residual value) × Money factor
The base payment is the sum of the two, and most states tax that base payment monthly:
Monthly payment = (Depreciation fee + Finance charge) × (1 + Tax rate)
To translate the money factor into a rate you recognize, multiply it by 2400:
APR ≈ Money factor × 2400
- C — the capitalized cost, your negotiated selling price minus any down payment or trade-in.
- R — the residual value, the car's projected worth at lease end.
- n — the lease term in months.
- MF — the money factor, the lease equivalent of an interest rate.
- t — the sales tax rate applied to the monthly base payment.
This lease calculator also amortizes the acquisition fee across the term so it shows up in your effective monthly cost, and it adds the disposition fee to the total lease cost since that is paid at the end when you return the car.
Key concepts and definitions
Capitalized cost (cap cost). The price the lease is based on — your negotiated selling price. Example: a car with a $35,000 MSRP negotiated to $32,000 has a $32,000 cap cost, lowered further by any down payment. Common mistake: accepting the MSRP as the cap cost. The selling price is negotiable on a lease exactly like a purchase, and every dollar off the cap cost lowers both your depreciation fee and finance charge.
Residual value. The car's predicted worth at lease end, set by the lender as a percentage of MSRP. Example: a 55% residual on a $35,000 car is $19,250. Common mistake: ignoring it. A higher residual means less depreciation to pay for, so a car that holds its value can lease cheaper than a less expensive car that depreciates fast.
Money factor. The lease version of an interest rate, written as a small decimal like 0.00125. Multiply by 2400 to get the APR (here, 3%). Common mistake: confusing money factor with APR. A "0.0025" money factor sounds tiny but equals a 6% APR, so always convert before judging the deal.
Cap cost reduction. A lease down payment or trade-in credit. Example: $2,000 down cuts the cap cost from $32,000 to $30,000. Common mistake: putting a large amount down. If the car is totaled or stolen early, that money is gone, so most experts recommend minimal down payments on a lease.
Acquisition and disposition fees. The acquisition fee (around $895) starts the lease; the disposition fee (around $395) is charged when you return the car. Example: these add roughly $1,290 to a typical lease. Common mistake: forgetting the disposition fee, which can surprise you at lease end unless you lease or buy again with the same brand.
How Car Leasing Works: The Complete Guide
Leasing is essentially a long-term rental that lets you drive a new car for a set period — usually 24 to 48 months — while paying only for the value it loses during that time, not its full price. When you lease, the bank or captive finance company buys the car and you pay them to use it. Your monthly payment covers two things: depreciation (the gap between what the car is worth now and its predicted residual value at lease end) and a finance charge that compensates the lender for the capital they have tied up in the vehicle. Because you are not buying the whole car, lease payments are typically lower than loan payments on the same model, which is the main reason drivers choose to lease. At the end of the term you have three options: return the car and walk away, buy it for the residual value stated in the contract, or lease something new. The trade-off is that you never build equity — when the lease ends you own nothing, whereas a financed car eventually becomes a paid-off asset. Leasing favors drivers who want a new car every few years, predictable payments, and full warranty coverage, and who stay within the mileage limit. Understanding how the depreciation fee, finance charge, and residual value interact is the key to knowing whether a quoted lease is actually a good deal, and that is exactly what this calculator surfaces.
Money Factor Explained: How to Convert to APR
The money factor is the single most misunderstood number on a lease. It is the lease equivalent of an interest rate, but it is written as a tiny decimal — something like 0.00125 — so it is impossible to judge at a glance. The conversion is simple and exact: multiply the money factor by 2400 and you get the equivalent annual percentage rate. So a 0.00125 money factor equals 0.00125 × 2400 = 3% APR, while a 0.00250 money factor equals 6% APR. The reason the magic number is 2400 rather than something else is that the money factor already folds in a division that ties it to monthly compounding; multiplying by 2400 unwinds that and annualizes the figure. Worked example: a dealer quotes you a money factor of 0.00188. Multiply by 2400 and you get 4.5% — now you can compare that directly against current auto loan rates and decide whether the lease financing is competitive. The danger is that some dealers quote the money factor specifically because it looks small and is hard to compare. Always convert it. If a salesperson cannot tell you the money factor, ask for it in writing, because it is just as important as the cap cost in determining your payment. This calculator does the conversion automatically and even lets you type an APR directly and converts it back to a money factor for you.
Lease vs Buy: Which is Cheaper?
The honest answer is "it depends on how long you keep the car." Over a single three-year term, leasing almost always has the lower monthly payment and the lower out-of-pocket cost, because you only pay for depreciation plus a finance charge rather than the whole vehicle. Consider a $35,000 car negotiated to $32,000. Leasing it for 36 months at a 0.00125 money factor and 55% residual might run about $450 a month, or roughly $16,200 plus fees over the term. Financing the same car over 60 months at 6.5% APR costs about $626 a month — clearly more per month. But here is the catch: after 36 months the lease driver returns the car and owns nothing, while the buyer has paid down most of the loan and holds a car worth perhaps $21,000. Keep that car for two more years until the loan is paid off, then drive it payment-free, and the buyer pulls decisively ahead. The break-even point — the month at which cumulative buying cost dips below cumulative leasing cost — usually lands somewhere between the end of the loan and a few years after. Use the lease vs buy calculator mode above to find your exact crossover, because it depends heavily on the money factor, residual, depreciation rate, and how the resale value compares to the loan balance.
Residual Value: Why It Matters More Than the Interest Rate
Most shoppers obsess over the money factor and barely glance at the residual value, but on a typical lease the residual drives a far larger share of your payment. Here is why: the depreciation fee — the biggest component of most lease payments — equals the cap cost minus the residual, divided by the term. A higher residual means a smaller gap to pay for, which directly shrinks your payment. Take a $35,000 car over 36 months. At a 55% residual ($19,250) the depreciation fee is about $354 a month; bump the residual to 62% ($21,700) and the depreciation fee falls to about $286 a month — a $68 monthly swing, or nearly $2,500 over the term, from the residual alone. By contrast, moving the money factor from 0.00125 to 0.00150 changes the finance charge by only a few dollars a month. This is why some pricier cars lease for less than cheaper ones: brands with strong resale value get high residuals, so there is simply less depreciation to finance. When you compare lease offers, look at the residual percentage first. A high residual is the closest thing to a free lunch in leasing, and it is set by the lender, not negotiable — but you can choose to lease the cars that have the best residuals.
Common Lease Fees and How to Negotiate Them
Leases carry several fees beyond the monthly payment, and knowing which are negotiable saves real money. The acquisition fee (also called a bank or origination fee) runs roughly $595 to $995 and is charged at signing to set up the lease; it is usually fixed by the lender, but the cap cost it is rolled into is negotiable, so push the selling price down to offset it. The disposition fee, around $300 to $500, is charged at lease end when you return the car to cover cleaning and resale prep; many brands waive it if you lease or buy another vehicle from them, so always ask. Watch for padded "dealer fees," documentation fees, and add-ons like fabric protection or VIN etching — these are pure profit and frequently negotiable or removable. The most powerful number to negotiate is not a fee at all but the capitalized cost itself, since lowering it reduces both your depreciation fee and finance charge every month. Negotiate the selling price as if you were buying, settle the money factor, and only then discuss the down payment. Never negotiate from the monthly payment, because a salesperson can hit any monthly target by quietly stretching the term or raising the cap cost. Always request an itemized breakdown so every fee is visible.
Mileage Limits and Overage Fees Explained
Every lease caps how many miles you can drive, typically 10,000, 12,000, or 15,000 miles per year. The mileage limit matters because it props up the residual value — the lender assumes a car with average mileage will be worth a predictable amount at lease end. Drive more than your allowance and you owe an overage fee at return, usually 15 to 30 cents per mile. The math adds up fast: on a 36-month lease with a 12,000-mile annual cap and a 20-cent overage rate, going 5,000 miles over the total allowance costs $1,000 at lease end. If you know you drive a lot, the smart move is to buy extra miles up front when you sign, because the prepaid per-mile rate is almost always lower than the at-return overage rate, and you can often get a partial refund on unused prepaid miles. Conversely, if you drive far below the limit you are effectively overpaying, since you are financing depreciation you never used — a low-mileage driver may be better off buying. There is no credit for driving under your allowance unless you negotiated a low-mileage lease. Estimate your real annual mileage honestly before signing, and use the cost-per-mile figure this calculator produces to see whether your driving pattern fits a lease or argues for buying instead.
Comparison: leasing vs buying a car
| Feature | Leasing | Buying (financing) |
|---|---|---|
| Monthly payment | Lower | Higher |
| What you pay for | Depreciation + finance charge | Full vehicle price + interest |
| Equity at end | None ($0) | The car (residual value) |
| Mileage | Capped, overage fees apply | Unlimited |
| Customization | Restricted, must return stock | Unlimited |
| Best for | New car every few years, low mileage | Keeping the car long term, high mileage |
| Long-run cost | Higher if you always lease | Lower once the loan is paid off |
Two worked examples
Example A — a typical 36-month lease
A $35,000 MSRP car, negotiated to a $32,000 cap cost, 55% residual, 0.00125 money factor, 36-month term, 8% sales tax, with no down payment.
- Residual value = 55% × 35,000 = $19,250.
- Depreciation fee = (32,000 − 19,250) ÷ 36 = 12,750 ÷ 36 = $354.17.
- Finance charge = (32,000 + 19,250) × 0.00125 = 51,250 × 0.00125 = $64.06.
- Base payment = 354.17 + 64.06 = $418.23.
- Monthly tax = 418.23 × 8% = $33.46, so the taxed payment is $451.69.
- Equivalent APR = 0.00125 × 2400 = 3%.
- Total lease cost ≈ 451.69 × 36 + 895 acquisition + 395 disposition ≈ $17,551.
Example B — a lease vs buy edge case
The same car, comparing the lease above against financing the $32,000 selling price over 60 months at 6.5% APR, with 15% annual depreciation.
- Loan payment = 32,000 amortized at 6.5% over 60 months ≈ $626/month.
- After 36 months the lease driver has paid ≈ $17,551 and owns $0 of equity.
- After 36 months the buyer has paid ≈ 626 × 36 = $22,536 and still owes about $13,800 on the loan, but the car is worth roughly 32,000 × (1 − 0.15)^3 ≈ $19,650.
- Buyer net position at month 36 ≈ paid $22,536 − equity ($19,650 − $13,800 owed = $5,850) = net cost ≈ $16,686, already close to the lease.
- Drive the bought car to month 60 when the loan clears, and the buyer owns an asset worth roughly $14,200 with no further payments — the buyer is now clearly ahead. The crossover lands shortly after the loan is paid off.
Edge cases and advanced scenarios
- Subsidized (subvented) lease. Manufacturers sometimes inflate the residual and slash the money factor to move inventory. A 0.00010 money factor (0.24% APR) with a high residual can make leasing dramatically cheaper than buying — these are the only deals where leasing can win on near-pure math.
- Large down payment / cap cost reduction. Putting $5,000 down lowers the monthly payment, but if the car is stolen or totaled in month two, gap insurance pays the lender and you lose your down payment. Keep cap cost reductions small and rely on the lender's residual instead.
- High-mileage driver leasing. Someone driving 25,000 miles a year on a 12,000-mile lease faces thousands in overage fees and a battered residual. For high-mileage use, buying almost always beats leasing — run both modes and compare cost per mile.
- Lease buyout at end. If the car's market value exceeds the contractual residual at lease end, buying it for the residual and reselling can capture instant equity — a scenario worth checking before you simply return the car.
What to do with your result
- Convert the money factor to APR with the MF × 2400 formula, then compare it against current loan rates using our auto loan calculator to see whether financing the same car is cheaper.
- Negotiate the cap cost first — it is the biggest lever on your payment — and only then discuss the money factor and down payment.
- Keep any cap cost reduction small, and confirm the residual percentage in writing, since a high residual lowers your payment for free.
- Run the lease vs buy mode and note the break-even month; if you plan to keep a car past that point, buying usually wins. Model the purchase loan in detail with our loan calculator.
- Double-check the equivalent interest cost and how rate changes affect you with the interest rate calculator before signing.
Related tools
Compare financing the same car with the auto loan calculator, size any loan with the general loan calculator, check rate scenarios in the interest rate calculator, and see a full payment schedule with the amortization calculator.