A free lease calculator that shows the math, not just the payment
Most lease calculators give you a monthly payment and stop. This one shows you what's actually being charged: how much is depreciation, how much is finance charge, and how much is tax. Understanding the breakdown lets you negotiate the right inputs.
The three components of a lease payment
- Depreciation: (Cap Cost - Residual) divided by the number of months. This is the part of the car's value you're actually using up. Largest part of most lease payments.
- Finance charge (rent): (Cap Cost + Residual) multiplied by the money factor. This is the lease's interest. Like interest on a loan, but calculated differently because you're paying on the average balance over the term.
- Sales tax: Applied to the total of depreciation and finance, monthly. (NJ and a few other states tax the total lease cost upfront instead.)
What's negotiable versus fixed
Understanding what you can move and what's locked is the key to lease negotiation:
- Negotiable: Selling price (cap cost), money factor (sometimes, with credit and a willing dealer), down payment, trade-in value, dealer fees.
- Not negotiable: MSRP (set by manufacturer), residual percentage (set by manufacturer), federal taxes, state registration.
Of the negotiable items, selling price has the biggest impact on monthly payment. A $1,500 cap cost reduction lowers a 36-month lease payment by roughly $42/month or $1,500 total over the term plus $30 to $40 in finance charge savings.
The single biggest mistake
Most lease customers focus only on monthly payment and miss the math beneath it. The dealer can hit any monthly payment by adjusting term length, down payment, or trade-in value. The same $399/month payment could be a great deal or a terrible one depending on the underlying numbers.
Walk in knowing the four key numbers: MSRP, residual percentage, money factor, and target selling price. Then negotiate the selling price first, separately from the monthly payment.
Lease vs finance vs buy used
Three common scenarios for the same $36,000 car:
- Lease (36 months): $399/month. Total spent: $14,364. You don't own anything at the end.
- Finance new (60 months): $625/month. Total spent over 60 months: $37,500. You own the car.
- Buy used (3-year-old, same model): $20,000 cash or $400/month over 60 months. Total spent: $24,000. You own a well-depreciated car.
Run all three through our true cost to own calculator for the full 5-year picture. Often the used buy wins on total cost.
Negotiating the money factor
Money factor is often presented as a take-it-or-leave-it number. It's usually not. Three tactics:
- Have strong credit. Money factor is risk-priced. Excellent credit (740+) gets the best rates.
- Look up the buy rate. The dealer marks up the manufacturer's lender's “buy rate” by 0.0001 to 0.0006 (sometimes more). Ask if there's a captive finance buy rate, and if you qualify for it.
- Shop multiple captive finance arms. If you're flexible on brand, BMW Financial, Mercedes Financial, Honda Finance, and Toyota Financial sometimes have very different money factors on similar lease deals.
Combine with our other tools: Use the dealer markup calculator to set your target selling price (cap cost) before negotiating the lease. Use the true cost to own calculator to compare leasing vs financing over 5 years.