Buy vs Lease vs Finance Car Calculator

How to Use This Should I Buy or Lease a Car Calculator

Enter your car's purchase price, down payment, tax rate, and how many years you plan to keep it. Then fill in the details for each option: cash purchase costs, lease monthly payment and terms, or loan interest rate and term. Hit "Compare All Three Options" and you'll instantly see total out-of-pocket costs, residual value, and a year-by-year breakdown for each scenario.

Why This Matters

Most people focus only on the monthly payment — but that's one of the most misleading numbers in car shopping. A $299/month lease on a $42,000 SUV can easily cost you $28,000+ over 3 years with nothing to show for it. A $550/month financed payment on the same car might leave you with a $15,000 asset after 5 years.

Here's a real scenario: You're comparing a $35,000 sedan. Buying cash costs about $38,800 upfront (with tax and fees) but you own an asset worth ~$18,000 after 5 years, so your net cost is ~$20,800. Leasing at $399/month over two back-to-back 3-year leases totals roughly $29,000+ in payments alone over 6 years — and you own nothing. Financing at 6.5% for 60 months means ~$33,000 in total payments, minus $18,000 residual value = ~$15,000 net after 5 years.

The "best" choice depends on your situation: how many miles you drive, whether you value ownership, your investment alternatives for that down payment cash, and your tolerance for maintenance. This tool helps you see all of that clearly.

How It's Calculated

Buy Cash: Total cost = Car price + Sales tax + Fees + (Annual insurance + maintenance) × years − Residual value. Residual value uses compound depreciation: Value = Price × (1 − depreciation rate)^years. Opportunity cost is also shown (what your down payment could earn invested).

Lease: Total cost = Down payment + (Monthly payment × lease months × number of cycles) + Acquisition fee(s) + Disposition fee(s) + Excess mileage charges + Insurance × years. No residual value benefit since you return the car.

Finance: Uses standard amortization: Monthly payment = P × [r(1+r)^n] / [(1+r)^n−1] where P = loan amount, r = monthly rate, n = months. Total cost = Down payment + Total payments + Fees + Insurance + Maintenance − Residual value after loan term.

Tips & Common Mistakes

• Don't ignore residual value. The car you finance or buy cash still has real worth at the end — subtracting it gives you the true net cost.
• Lease mileage overage is expensive. At 25¢/mile, driving 3,000 extra miles per year adds $2,250 over a 3-year lease. Enter your real annual mileage.
• Opportunity cost matters for cash buyers. Paying $35,000 cash means forgoing ~5 years of investment returns — this tool shows you what that costs.
• Lease maintenance costs are often lower for the first 3 years (typically under factory warranty), but you'll start the cycle again at the end.
• Compare over the same time period. A 3-year lease vs. a 5-year loan aren't apples-to-apples — set your comparison period to match your actual plans.

Frequently Asked Questions

Is it always cheaper to buy a car outright?

Not necessarily — it depends on the opportunity cost of that capital, the car's depreciation rate, and the lease/loan terms available. A savvy lease deal on a slow-depreciating car can sometimes beat an outright purchase, especially if you invest the difference. However, buying cash typically wins over 7–10+ year timeframes.

When does leasing make financial sense?

Leasing makes sense when: you drive under the mileage limit, you prefer a new car every 2–3 years, the manufacturer subsidizes residual values heavily, or you use the car for business and can deduct lease payments. It rarely makes sense for high-mileage drivers or those who want to build equity.

What's the difference between "total cost" and "net cost" in this calculator?

"Total cost" is everything you pay out of pocket — payments, down payment, fees, insurance, maintenance. "Net cost" subtracts the car's estimated residual value (what it's worth if you sell it). Net cost is the most honest apples-to-apples comparison between buying/financing vs. leasing.

How accurate is the depreciation estimate?

The default 15%/year compound depreciation is a reasonable average for mainstream sedans and SUVs. Luxury cars often depreciate faster (20–25%/year), while trucks and some SUVs depreciate slower (10–12%). Adjust the slider to match your specific vehicle's historical depreciation for a more accurate result.