A car lease payment is calculated by adding two charges together and then applying sales tax: a depreciation charge that covers the vehicle’s loss in value over the lease term, and a rent charge that works like interest on the money the leasing company has tied up in the car. The formulas are simple arithmetic once you have the right inputs, and seeing how each piece works lets you check a dealer’s numbers before you sign.
The Five Numbers You Need First
Every lease calculation runs on five inputs. Pull them from the dealer’s lease worksheet or the federally required disclosure form before you try any math.
- Gross capitalized cost. The negotiated vehicle price plus anything rolled into the lease, such as an extended service contract, dealer add-ons, or a balance carried over from a previous loan. This is the total amount being financed.
- Capitalized cost reduction. Your down payment, trade-in credit, and any manufacturer rebates. These lower what you finance.
- Adjusted capitalized cost. Gross capitalized cost minus the capitalized cost reduction. This is the real starting number for the payment formula.
- Residual value. What the leasing company predicts the car will be worth at the end of the lease, expressed as a percentage of the original sticker price. A car with a $40,000 MSRP and a 55 percent residual has an end-of-lease value of $22,000. Most vehicles land between 50 and 60 percent for a 36-month term.
- Money factor. The lease equivalent of an interest rate, written as a small decimal like 0.00150 instead of a percentage. Multiply by 2,400 to get a rough annual rate for comparison shopping. A money factor of 0.00150 translates to approximately 3.6 percent. The conversion is an approximation, but it is close enough to compare against a traditional auto loan rate.
Federal law requires the leasing company to show you how your payment is calculated. Regulation M, the federal rule implementing the Consumer Leasing Act, mandates a written breakdown that includes the gross capitalized cost, the capitalized cost reduction, the adjusted capitalized cost, the residual value, the depreciation amount, and the rent charge. You have the right to request a separate itemization of the gross capitalized cost before signing.1eCFR. 12 CFR Part 213 – Consumer Leasing Regulation M
The Depreciation Charge
The depreciation charge is the bigger chunk of your monthly payment. It reimburses the leasing company for the value the car loses while you drive it. The formula:
Monthly depreciation = (Adjusted capitalized cost − Residual value) ÷ Lease term in months
Say you negotiate a vehicle down to $38,000, roll in $1,000 in fees for a gross capitalized cost of $39,000, and put $2,000 down. Your adjusted capitalized cost is $37,000. If the residual value is $22,000 and the lease runs 36 months, total depreciation over the term is $15,000. Divide that by 36 and the monthly depreciation charge comes to $416.67.
This number stays the same every month. It is the single largest lever on your payment. A lower negotiated price reduces the adjusted capitalized cost. A higher residual reduces the total depreciation. Both push the depreciation charge down. A longer term spreads the same depreciation over more months but also gives the car more time to lose value, so extending the lease does not always shrink the payment as much as people expect.
The Rent Charge
The rent charge is the financing cost. The formula works differently from a traditional loan because it accounts for the average amount the leasing company has invested in the car over the full term rather than a declining principal balance:
Monthly rent charge = (Adjusted capitalized cost + Residual value) × Money factor
Adding the starting value and the ending value together approximates the leasing company’s average exposure over time.2Federal Reserve Board. Vehicle Leasing – More Information About the Rent Charge Using the same example numbers: ($37,000 + $22,000) × 0.00150 = $88.50 per month. That $88.50 is what you pay the leasing company for the privilege of using their capital.
A higher money factor inflates this charge directly. If the dealer marks up the money factor from 0.00150 to 0.00200, the rent charge jumps from $88.50 to $118.00. Over 36 months, that markup costs you an extra $1,062 with nothing changing on the car, the residual, or anywhere else on the deal sheet. Knowing the money factor matters more than most buyers realize.
Putting It All Together
Here is the full calculation in one place, using round numbers.
- MSRP: $40,000
- Negotiated price: $38,000
- Fees rolled in: $1,000
- Gross capitalized cost: $39,000
- Down payment: $2,000
- Adjusted capitalized cost: $37,000
- Residual value (55 percent of MSRP): $22,000
- Money factor: 0.00150 (≈ 3.6 percent APR)
- Lease term: 36 months
Depreciation charge: ($37,000 − $22,000) ÷ 36 = $416.67 per month.
Rent charge: ($37,000 + $22,000) × 0.00150 = $88.50 per month.
Pre-tax payment: $416.67 + $88.50 = $505.17.
Applying a 7 percent sales tax: $505.17 × 0.07 = $35.36. Final monthly payment: $540.53. Over 36 months, you pay $19,459 in total monthly payments plus the $2,000 down, for an all-in cost of roughly $21,459 to drive the car for three years.
How Sales Tax and Fees Change the Number
How sales tax applies to a lease depends on where you live. Most states tax only the monthly payment, meaning you pay tax on each billing cycle rather than on the full vehicle price. A handful of states charge tax on the total lease value upfront at signing. That distinction can add hundreds or thousands to your out-of-pocket cost at the start of the lease if you happen to live in an upfront-tax state, so check before you budget.
The acquisition fee is charged by the leasing company to originate the lease, typically running a few hundred to roughly a thousand dollars. It is usually folded into the gross capitalized cost, which means you pay it gradually through higher monthly payments rather than all at once. Documentation fees are set by the dealer and vary widely. About a third of states cap these fees by law; the rest let dealers charge what the market will bear, producing amounts from under $100 to nearly $900 depending on where you shop.
If any fee was not included in the capitalized cost, it is either collected at signing or spread across your monthly payments as a separate line item. Either way, it should appear on the disclosure form.
What You Can Negotiate to Lower the Payment
Not every number on the lease sheet is fixed. The selling price of the vehicle, which drives the gross capitalized cost, is negotiable the same way it would be on a purchase. Dealer-installed accessories and add-on products are also fair game. Some dealers mark up the money factor above what the leasing company actually charges, and that markup is negotiable too.
The residual value is set by the leasing company using third-party depreciation forecasts and is not something you can haggle over. The acquisition fee is also fixed. That tells you where to focus: negotiate the vehicle price, question any fees the dealer controls, and ask what the buy-rate money factor is before accepting the one you are quoted.
Your credit score influences which money factor you qualify for. Lessees with scores around 700 or above tend to receive the most competitive rates, while scores below that range typically mean a higher money factor and either a larger down payment or a higher monthly cost. The average credit score for new-car lessees was 753 as of mid-2025, which gives you a benchmark for where leasing companies set their best offers.
Costs the Monthly Payment Doesn’t Show
The monthly payment isn’t the full cost of leasing. When the lease ends, if you return the car you can expect a disposition fee, typically $300 to $400, plus excess mileage charges of roughly $0.10 to $0.25 per mile if you drove beyond your annual limit. The leasing company will also inspect for excess wear and tear, and dented panels, cracked glass, torn upholstery, worn tires, and poor prior repairs can all trigger charges.3Federal Reserve Board. More Information About Excessive Wear-and-Tear Charges
You also have the option to buy the car at the residual value plus a small purchase option fee, which skips the disposition, mileage, and wear-and-tear charges entirely. And ending a lease before the term expires is expensive: the early termination charge is generally the gap between the remaining balance and what the leasing company can recover selling the vehicle, and that gap is widest in the early months.4Federal Reserve Board. Vehicle Leasing – Up-Front, Ongoing, and End-of-Lease Costs None of these enter the monthly payment formula, but they are worth knowing before you compare a lease payment to the cost of buying.