Lease vs Buy Calculator

Lease vs Buy Calculator: Compare 5-Year Cash Outflow, Money Factor & Vehicle Equity

Monthly payment stickers on a dealership windshield are designed to hide total vehicle cost. A $469-per-month lease almost always looks friendlier than a $645-per-month purchase loan on the exact same $35,000 SUV—until month 37 arrives, you hand back the keys, pay a $395 disposition fee, and realize you own zero dollars of equity and still need a car. This Lease vs Buy Calculator puts both financing structures on an equal multi-year footing, translating obscure dealer money factors into true APRs, accounting for repeat lease cycles, and subtracting ending resale equity from your purchase costs so you see which option actually leaves more money in your bank account.

What Is a Lease vs Buy Calculator?

A lease vs buy calculator is an automotive total-cost-of-ownership model that evaluates whether renting a vehicle’s depreciation for 24 to 48 months beats financing the entire asset and keeping the leftover equity. Dealership F&I managers routinely steer shoppers toward monthly cash flow rather than net wealth impact. Because a lease only charges you for the value a car loses during the contract—plus a rent charge on tied-up capital—monthly lease payments run 20% to 35% lower than a 60-month auto loan.

Consider Marcus, an account manager in Columbus shopping for a $38,000 midsize crossover. He drives 11,500 miles a year and debates between a 36-month lease at a 0.0019 money factor (57% residual, $795 acquisition fee) and a 60-month purchase loan at 6.4% APR using our Auto Loan Calculator. If Marcus swaps cars every three years regardless, leasing keeps him under bumper-to-bumper factory warranty and limits sales tax to his monthly payments. If he holds his vehicles for seven years, however, stringing together back-to-back leases costs him over $11,400 more than buying once and driving payment-free in Years 6 and 7.

How the Lease vs Buy Calculator Formula Works (Step-by-Step Example)

Auto leases and purchase loans rely on two completely different amortization formulas. For a lease, your payment splits into a monthly depreciation charge and a monthly rent (finance) charge, taxed at your state rate:

Monthly Lease Payment = [ (Net Cap Cost − Residual Value) ÷ Term + (Net Cap Cost + Residual Value) × Money Factor ] × (1 + Sales Tax Rate)

Let’s walk through the default $35,000 MSRP scenario with $3,000 down at signing, 7% sales tax, a 36-month lease at a 0.0018 money factor (0.0018 × 2,400 = 4.32% APR), 55% residual, $795 acquisition fee, and $395 disposition fee:

• Residual Value: $35,000 × 0.55 = $19,250 guaranteed lease-end value.
• Depreciation Charge: ($35,000 − $19,250) ÷ 36 = $437.50/month.
• Finance (Rent) Charge: ($35,000 + $19,250) × 0.0018 = $97.65/month.
• Taxed Monthly Lease Payment: ($437.50 + $97.65) × 1.07 = $572.61/month.
• 36-Month Single-Lease Outflow: $3,000 down + $795 acq fee + ($572.61 × 36) + $395 disp fee = $24,804—with $0 equity at turn-in.

Now compare buying the same $35,000 car with $3,000 down, 7% sales tax ($37,450 total price, $34,450 financed) on a 60-month loan at 6.5% APR over a 5-year horizon:

• Monthly Loan Payment: $674.05/month ($40,443 total loan payments over 60 months).
• 5-Year Gross Buy Outflow: $3,000 down + $40,443 loan + ($600 × 5 maintenance) + ($200 × 5 extra insurance) = $47,443.
• Ending Vehicle Equity (15%/yr compound depreciation): $35,000 × (0.85)^5 = $15,530 owned outright.
• 5-Year Net Buy Cost: $47,443 − $15,530 = $31,913, beating multi-cycle leasing over five years by more than $6,900.

Money Factor, Residual Value & Ownership Horizon Benchmarks

Two hidden levers dictate whether a manufacturer’s lease is subsidized (“subvented”) or overpriced: the money factor and the residual percentage set by the captive lender. Use the benchmark table below to audit any dealer worksheet before signing, and see how holding horizons shift the winner on a typical $35,000 vehicle.

Notice what happens after Month 60: once the auto loan disappears, a buyer’s annual vehicle expense drops to routine maintenance, tires, and insurance—roughly $800 to $1,500 per year—while the serial lessee keeps writing $570+ checks every single month plus fresh $795 acquisition fees every three years. If you want to accelerate that debt-free milestone even earlier, test extra principal payments in our Early Car Payoff Calculator.

Hidden Dealer Markups, Mileage Traps & Tax Rules

Even when a manufacturer advertises a 0.00125 “buy-rate” money factor (3.00% APR), dealership finance offices are legally permitted by most captive lenders to mark up the money factor by 0.00040 to 0.00100—quietly adding 1% to 2.4% APR in pure dealer profit without changing the vehicle’s selling price. Always ask the finance manager for the base buy-rate money factor for Tier-1 credit, and negotiate the vehicle’s Gross Capitalized Cost down from MSRP just as aggressively as you would if paying cash.

Pay close attention to how you use the car day-to-day. Leasing contracts enforce strict return standards: driving 15,500 miles a year on a 10,000-mile ultra-low-mileage teaser lease accumulates 16,500 extra miles over 36 months. At $0.25 per mile, that is a $4,125 penalty check due the day you turn in the keys, before the inspector even measures tire tread depth (typically required to be at least 4/32 inch on all four corners). Conversely, if you own an LLC or S-Corp and use the vehicle primarily for client site visits, leasing allows straightforward percentage-of-business-use lease payment deductions—though high-mileage drivers should also run our EV vs Gas Car Total Cost Calculator to check fuel and depreciation tradeoffs.

Common Mistakes People Make With the Lease vs Buy Calculator

• Putting $4,000+ down on a lease to chase a $299 teaser payment: Advertised lease specials almost always bury $3,999 to $4,999 due at signing in fine print. Unlike a purchase down payment that builds recoverable equity, a lease cap cost reduction vanishes if an uninsured driver totals your car two blocks from the dealership. Always compare zero-cap-reduction leases.
• Stretching a purchase loan to 72 or 84 months at higher APRs: Shoppers who try to match a 36-month lease payment by taking an 84-month auto loan at 7.9% APR spend the first four years underwater (owing more than the car’s depreciated trade-in value) and pay thousands in extra interest.
• Ignoring disposition, acquisition, and registration turnover fees: Every 36-month lease charges a $595–$995 bank acquisition fee upfront and a $350–$495 disposition fee when you walk away. Over nine years, three consecutive leases burn $3,500+ in non-refundable bank fees alone.

Plug the exact numbers from your dealer’s lease worksheet and credit union pre-approval into the calculator above before stepping into the F&I office. Seeing the 5-year and 7-year net equity gap in plain dollars gives you instant leverage to walk away from inflated money factors or choose the financing path that fits how long you actually keep your cars.

Related Calculators: Auto Loan Calculator · Early Car Payoff Calculator · Loan Comparison Calculator · Fuel Cost Calculator