Decision Engines
✓ Deterministic Equity-Adjusted Amortization 3-Year Capital Efficiency Model Zero Server Round-Trip

Car Lease vs. Buy Calculator & Capital Efficiency Engine

Should you lease or finance? Contrast monthly cash flow against 3-year equity accumulation, convert money factor to APR, and model the true financial cost after turn-in fees and vehicle depreciation.

1. Vehicle Pricing & Financing Terms

Total agreed selling price before incentives, fees, and trade-in.
Capitalized cost reduction / cash down.
Quoted monthly lease debt service.
Financing APR for buying.
Standard loan amortization term.
Projected private market value in 36 mo.
Disposition and end-of-lease charges.
Monthly Lease Debt Service: $480.00 / mo
Monthly Purchase Loan Payment: $763.08 / mo
Monthly Lease Cash Flow Advantage: +$283.08 / month
Immediate monthly pocket cash freed up by leasing vs financing.

2. Lease vs. Purchase Efficiency Verdict

✓ Purchase Wins: +$1,720.93 Equity Advantage
+$1,720.93
Equity Adjusted

While leasing frees up $283.08/month in cash flow, purchasing builds $8,069.94 in vehicle equity over 36 months. Factoring in retained asset value, buying is $1,720.93 cheaper over 3 years.

Monthly Payment Delta +$283.08 / mo Lease Cash Flow Advantage
36-Mo Retained Equity +$8,069.94 Purchase Asset Accumulation
3-Year Out-of-Pocket $20,680 vs $30,471 Total Outflow (Lease vs Loan)
Net 3-Year Advantage +$1,720.93 Buy Equity-Adjusted Bottom Line
F&I Negotiation & Quote Script

"Please provide the money factor, acquisition fee, and residual value percentage on this lease quote. I also request an identical 36-month zero down payment calculation to verify the true annual cost of capital."

Check Pre-Approved Auto Loan Rates

Get competitive direct financing rates from credit unions and banks before stepping into dealership F&I offices.

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Verify Dealer Doc Fees & State Caps

Dealers often pad lease contracts with excessive administrative documentation fees. Verify your legal state cap.

Verify Doc Fee Caps

3-Year Capital Efficiency Ledger: Lease vs. Purchase Comparison

Deterministic 36-Month Model

Comprehensive comparison of out-of-pocket debt service, turn-in fees, remaining loan principal, and net vehicle equity.

Financial Expense Category
Lease
36-Month Lease Agreement
Purchase
60-Month Financing Loan
Monthly Debt Service Payment Recurring monthly payment to drive vehicle $480.00 / mo Fixed 36-month lease contract $763.08 / mo Based on 6.5% APR (60 Mo)
Upfront Cash Capital Outlay Initial down payment and capitalized cost reduction $3,000.00 Cap cost reduction (Sunk asset) $3,000.00 Initial equity investment
Cumulative 36-Month Debt Outflow 36 scheduled monthly payments $17,280.00 36 payments @ $480.00/mo $27,470.88 36 payments @ $763.08/mo
End-of-Term Turn-in / Disposition Fees Lender turn-in and lease termination charges $400.00 Contract disposition fee $0.00 Zero turn-in fees (Owned vehicle)
Retained Vehicle Equity at Month 36 Estimated resale value less remaining debt $0.00 Zero equity (Vehicle returned to dealer) +$8,069.94 $25,200 Resale - $17,130 Remaining Debt
Net 3-Year Equity-Adjusted Cost Total Outflow Less Retained Asset Equity $20,680.00 $22,400.94
✓ Financial Decision Verdict: Purchasing builds $8,069.94 in vehicle equity over 3 years. After adjusting for asset equity, buying is $1,720.93 cheaper overall than leasing.

Vehicle Lease vs. Purchase Financial Decision & Audit Sheet

Generated via cars.zone Deterministic Automotive Financial Intelligence. Retain for dealership transaction verification.

Negotiated Price: Down Payment:
Monthly Lease Payment: Monthly Loan Payment:
Monthly Cash Flow Delta: Net 3-Year Equity Delta:
F&I Disclosure & Policy Notice:
I am comparing lease vs. financing options for this $42,000 vehicle. Please disclose all acquisition charges, money factor, and turn-in disposition fees before signing.
Vehicle Purchaser / Lessee
Signature / Date
Dealership F&I Representative
Signature / Date