Car Lease Vs Buy Calculator guide
Vehicle lease and purchase offers should be compared over the same time horizon. A lease payment covers use and depreciation but does not normally create ownership.
Buying can cost more initially but may leave resale equity after the loan is repaid.
How to use the car lease vs buy calculator
- Enter current amounts: Use current, documented values from the same relevant period.
- Enter assumptions: Use realistic rates, percentages, periods, and costs where applicable.
- Review the full result: Review the primary estimate together with its supporting measures.
- Stress-test risk: Model less favorable timing, value, cost, or rate assumptions.
Formula and variables
The estimate applies the entered values and assumptions to the stated formula.
Net buy cost = down payment + loan payments + remaining payoff − resale value- Inputs — Entered values
- The amounts, percentages, or periods supplied to the calculator.
- Result — Calculated output
- The estimate produced by applying the formula to the entered values.
Worked example: car lease vs buy calculator
A user enters a representative set of values and assumptions.
- Key inputs
- Amounts, percentages, periods, and costs
- Apply the stated formula.
- Include all relevant entered values and constraints.
- Compare the result with an alternative scenario.
Result: Modeled lease cost, net purchase cost, and estimated difference.
Use the estimate as a planning input and verify important decisions with current records or qualified guidance.
Understanding your results
Primary estimate
Modeled lease cost, net purchase cost, and estimated difference.
Risk measures
Use supporting payment, leverage, cost, and cash figures together.
Assumptions
- Entered rates and costs remain constant.
- Payments and cash flows occur on schedule.
Limitations
- Taxes, legal terms, accounting treatment, and transaction-specific costs may differ.
- Future values, timing, and rates are uncertain.
Common mistakes
- Reviewing only the headline result.
- Ignoring relevant costs, timing, or supporting measures.
- Using optimistic timing or value assumptions.
- Treating an estimate as a guaranteed outcome.
Practical use cases
Compare scenarios consistently
Change one assumption at a time or enter each alternative using the same basis.
Plan cash requirements
Estimate funds needed before committing.
Planning and decision guide
Stress-test the assumptions
Use realistic mileage and include possible excess-wear and disposition charges.
Review the important risks
Depreciation and resale value are uncertain, especially for long ownership horizons.
Verify the source values
Compare out-the-door price, money factor or lease charge, acquisition fees, APR, and insurance.
Frequently asked questions
Is leasing cheaper than buying?
It depends on offers, mileage, fees, depreciation, financing, and how long you keep vehicles.
Why model repeated leases?
A comparison horizon may extend beyond one lease term.
What happens if I exceed mileage?
The lease may charge a per-mile fee unless additional mileage was purchased.
Does buying always build equity?
Not immediately; the loan balance can exceed vehicle value, especially early in a long loan.
Sources and review
- Financing or leasing a car — Federal Trade Commission. Accessed 2026-07-10.
Reviewed 2026-07-10.