How to Use the Car Lease Calculator
The Car Lease Calculator computes your monthly lease payment, total lease cost, and equivalent APR from the key lease parameters: capitalised cost (vehicle price), residual value (car's predicted value at lease end), money factor (lease interest rate), and lease term.
Enter the cap cost (negotiated vehicle price), residual value (shown as a percentage of MSRP or dollar amount), money factor (usually a small decimal like 0.00125), and any down payment. The calculator shows your monthly base payment, total depreciation charge, total rent charge, and overall lease cost.
A critical nuance: the money factor is the lease's interest rate in disguise. Multiply money factor by 2,400 to get the approximate APR equivalent. A money factor of 0.00200 = 4.8% APR. Always convert and compare to car loan rates before signing — sometimes buying with a loan is cheaper than a seemingly attractive lease.
📊 Worked Example
$35,000 MSRP, negotiated $33,500 cap cost, 55% residual ($19,250), money factor 0.00150, 36-month lease, $0 down:
- Monthly depreciation: (33,500−19,250) ÷ 36 = $395.83
- Monthly finance charge: (33,500+19,250) × 0.00150 = $79.13
- Monthly payment (pre-tax): $474.96
- Total lease cost (36 months): $17,099
- Equivalent APR: 0.00150 × 2400 = 3.6%
Common Use Cases
- ✅ Calculating monthly payment for a car lease
- ✅ Comparing lease vs buy total costs over the same period
- ✅ Evaluating whether the money factor is competitive
- ✅ Understanding how negotiating cap cost reduces monthly payments
- ✅ Calculating the impact of a larger down payment on lease cost
- ✅ Comparing two lease offers with different terms or residuals
Frequently Asked Questions
What is a money factor in a car lease?
The money factor is the interest rate for the lease expressed as a very small decimal (e.g. 0.00200). Multiply by 2,400 to get the equivalent APR (0.00200 × 2,400 = 4.8%). It's set by the manufacturer's finance arm. You can sometimes negotiate a lower money factor or find manufacturers offering 0% money factor promotions.
What is residual value in a lease?
Residual value is the predicted worth of the vehicle at the end of the lease, set by the finance company. Higher residual = lower monthly payments because you're only paying for the car's depreciation during the lease. You don't pay anything toward the residual value unless you buy the car at lease end.
Should I put money down on a lease?
Financially, a larger down payment (cap cost reduction) reduces monthly payments but doesn't reduce your total lease cost proportionally. If the car is totalled in an accident, you lose your down payment (gap insurance may not cover it). Many financial advisors recommend minimal or no down payment on a lease and investing the cash instead.
What is gap insurance on a lease?
Gap insurance covers the difference between your car's current market value and the remaining lease balance if the car is totalled or stolen. Since a new car depreciates quickly, you could owe more than the car is worth. Most lease agreements include gap coverage, but check yours — it's critical protection if you're in an accident.
Is it better to lease or buy a car?
Leasing is better if: you want lower monthly payments, you like changing cars every 3 years, you drive under 10,000–12,000 miles/year, and you don't want to deal with selling. Buying is better if: you drive a lot (leases have mileage limits with penalties), you want to build equity, you plan to keep the car long-term, or you want to modify the vehicle.