Auto Lease Calculator
Calculate your exact monthly car lease payment using the real lease math — money factor, residual value, depreciation, and finance charge. Enter the interest rate as APR or money factor. The calculator converts between them automatically and applies the 1% rule to tell you whether you are getting a good deal.
% of MSRP at lease end
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How It Works
Depreciation is the difference between the negotiated cap cost and the residual value, divided by the lease term. This is what you pay for using the vehicle — the value it loses during your lease.
Depreciation = (Cap Cost - Residual Value) / Term($35,000 - $20,000) / 36 = $416.67/mo depreciationThe finance charge equals the sum of cap cost and residual value multiplied by the money factor. Uniquely, you pay interest on both the depreciated amount and the residual — the full value — not just what you owe.
Finance = (Cap Cost + Residual) × Money Factor($35K + $20K) × 0.00208 = $114.40/mo financeMoney factor and APR are the same thing expressed differently. Divide APR by 2,400 to get money factor. Multiply money factor by 2,400 to get APR. Always convert to APR to compare lease deals and verify you are not being overcharged.
Money Factor = APR / 2400; APR = Money Factor × 24000.00208 × 2400 = 4.99% APRVehicles with high residual values (50% to 65%) are the best to lease. Honda, Toyota, and luxury brands often hold value well. Low-residual vehicles (35% to 45%) mean you pay for more depreciation, making leasing less economical.
Monthly savings = (Cap Cost × Residual Difference%) / Term60% vs 50% residual on $40K car = $111/mo differenceDivide the total monthly payment (including tax) by the MSRP. A result at or below 1% is a good deal. Above 1% means the depreciation, money factor, or residual value is unfavorable — negotiate harder or walk away.
Quality Ratio = Monthly Payment / MSRP × 100$425/mo on $40K MSRP = 1.06% — slightly above 1%Total cost includes all monthly payments plus any upfront costs such as down payment, acquisition fee, first month, and security deposit. Compare this against buying the same vehicle and selling after the same period.
Total = (Monthly × Months) + Down + Acq Fee$425 × 36 + $2,000 down + $895 acq = $18,195 totalQuick Reference
Common examples — verify instantly above.
0.00208 money factor
Convert to APR
4.99% APR
5% APR
Convert to money factor
0.002083
$45K car, 55% residual
Residual value at lease end
$24,750
1% rule
$45,000 MSRP
Target ≤ $450/mo
$35K cap, $20K residual, 36mo
Monthly depreciation
$416.67/mo
Finance charge
$55K cap+res, 0.00208 MF
$114.40/mo
$45K, 55% res, 5% APR, 36mo
Total monthly (no tax)
≈ $540/mo
1% rule verdict
$540 on $45K MSRP
1.2% — above 1%, negotiate
Tips & Shortcuts
Always ask the dealer for the money factor and residual value in writing before signing. These are negotiable at some dealers and determine your payment more than any other factor.
Negotiate the cap cost (vehicle price) first, before mentioning you intend to lease. Dealers may inflate the cap cost if they know you are focused on the monthly payment.
Look for vehicles with manufacturer-subsidized lease deals. Manufacturers often offer artificially low money factors or inflated residuals to move specific models, creating exceptional lease deals.
Avoid large down payments on leases. Down payments reduce the monthly payment but offer no protection if the vehicle is totaled — GAP insurance is a better protection.
Match your mileage allowance to your actual driving. Excess mileage fees of 10 to 25 cents per mile add up quickly. Negotiate more miles upfront rather than paying overage at lease end.
Consider the acquisition fee, disposition fee, and security deposit in your total cost. These vary by manufacturer and can add $1,000 to $2,000 to the lease cost.
Common Mistakes to Avoid
Focusing only on the monthly payment and ignoring cap cost and money factor
Dealers can manipulate the monthly payment by adjusting cap cost, residual, and money factor independently. Always negotiate cap cost first, then verify the money factor against current published rates.
Not converting money factor to APR before evaluating the deal
A money factor of 0.004 looks small but is 9.6% APR — very high. Always multiply by 2,400 to see the true interest rate and compare across lenders.
Putting a large down payment on a lease
If the car is stolen or totaled, the down payment is gone — the insurance pays the leasing company, not you. Keep upfront costs minimal on a lease and use GAP coverage instead.
Choosing mileage based on the lowest monthly option without checking actual driving
Most people underestimate their mileage. Excess mileage fees of 15 to 25 cents per mile can easily exceed $1,000 to $3,000 at lease end. Estimate generously upfront.
Leasing a vehicle with low residual value
Vehicles that depreciate quickly (luxury brands in lower tiers, certain sedans) have low residuals, making the lease expensive. Check published residuals before falling in love with a specific model.
Not understanding early termination costs
Breaking a lease early typically costs all remaining payments plus a termination fee minus the current market value. Early termination can cost $3,000 to $10,000. Lease only if you are confident about the full term.
Frequently Asked Questions
The money factor (also called lease factor or rent charge) is the interest rate expressed as a small decimal. To convert money factor to APR, multiply by 2,400. For example, a money factor of 0.00208 equals a 4.99% APR. Dealers quote money factors to obscure the interest rate — always convert to APR to evaluate the deal.
Residual value is the estimated worth of the vehicle at lease end, expressed as a percentage of MSRP. A 55% residual on a $45,000 car means it is estimated to be worth $24,750 after 3 years. Higher residual values result in lower monthly payments because you are financing less depreciation.
The 1% rule is a quick quality check: divide the monthly lease payment by the vehicle MSRP. If the result is at or below 1%, it is considered a good deal. A $45,000 car should lease for around $450 or less per month to meet the 1% rule. Above 1% suggests negotiating harder or considering a different vehicle.
A lease payment has three components: depreciation (capitalized cost minus residual divided by months), finance charge (capitalized cost plus residual multiplied by money factor), and sales tax on both components. The formula is: Monthly = (Cap Cost - Residual) / Term + (Cap Cost + Residual) × Money Factor + Tax.
Absolutely. The capitalized cost (cap cost) is the negotiated price of the vehicle — it is not necessarily the MSRP. Every dollar you negotiate off the cap cost reduces your monthly payment proportionally. Always negotiate the vehicle price before discussing lease terms.
Financial experts generally recommend against large down payments on leases. If the car is totaled, you lose the down payment (it is not returned). A higher monthly payment with no money down provides the same total cost but protects your cash. Instead, use down payment funds to invest or pay down higher-rate debt.
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