Lease vs. Buy: How to Compare the Real Cost

Why the monthly payments are not equivalent

A lease payment mainly pays expected depreciation during the contract plus rent charge, tax, and financed items. A loan payment reduces a balance on a vehicle the borrower owns, while also paying interest and financed costs.

At month 36, a lessee commonly returns the vehicle or exercises a purchase option. A buyer may still have a loan balance, but also owns a vehicle with market value. Ignoring that equity biases the comparison against buying. Ignoring lease-end exposure biases it against leasing.

Choose one comparison date

Use the lease term as a practical horizon—for example, 36 months. Ask what each choice has cost and what asset or obligation remains at that date.

Do not compare a 36-month lease with the total payments of a 72-month loan. For the purchase, calculate the first 36 months of cash outflow, remaining loan balance, and estimated vehicle value at month 36.

Build the lease column

Include:

• amount due at signing;
• remaining scheduled payments;
• tax not already included;
• acquisition and unavoidable dealer/government fees;
• disposition fee when applicable;
• expected mileage and wear exposure;
• cost of products you choose;
• refundable deposits as a separate cash-flow item.

Do not count a purchase-option amount unless your scenario assumes buying the leased vehicle.

Build the purchase column

Include:

• down payment and initial fees;
• loan payments through the comparison date;
• tax and registration differences;
• maintenance and repair differences you reasonably expect;
• remaining loan balance;
• estimated vehicle market value.

Purchase equity at the horizon is:

estimated vehicle value − remaining loan balance

Subtract positive equity from purchase cash outflow. If the balance exceeds value, the result is negative equity and increases the net cost of exiting at that date.

A simplified example

Suppose the 36-month lease produces $20,500 of total cash outflow including expected return charges.

The purchase produces $25,800 of cash outflow over the same 36 months. At that point, the vehicle is estimated at $27,000 and the loan balance is $19,500, leaving $7,500 of estimated equity.

Purchase net cost = $25,800 − $7,500 = $18,300

Under these assumptions, purchase net cost is $2,200 lower. Change market value, financing, maintenance, mileage, or holding period and the result can reverse. This is why the lease-versus-buy calculator shows the assumptions instead of issuing a universal rule.

Mileage affects both sides differently

A lease can impose a stated excess-mile charge. A purchased vehicle has no contract overage, but more miles can reduce its market value and increase maintenance.

Use the same driving estimate in both scenarios. Do not assign a lease overage while leaving the purchase value unchanged as if mileage had no effect.

Taxes and incentives need separate treatment

Lease and purchase tax methods can differ by state. An incentive may apply only to leasing, only to purchasing, or be passed through differently. Compare the written offers available to you rather than assuming one credit applies equally.

Use the lease-tax pages to understand state-level method, then verify local and vehicle-specific treatment with the dealer and tax authority.

Consider the non-math differences

Leasing may fit when

• you prefer a planned replacement cycle;
• your mileage is predictable;
• warranty-period driving matters;
• you value lower short-term cash flow more than long-term ownership;
• you accept return standards and contract limits.

Buying may fit when

• you keep vehicles well beyond the loan;
• mileage or use is unpredictable;
• you want modification and resale freedom;
• you can absorb repair variation after warranty;
• building vehicle equity matters.

Neither list proves the answer. It identifies which risks you are choosing.

Run sensitivity checks

Calculate at least three purchase values: conservative, expected, and optimistic. Test higher maintenance. Test lease overage. Test a longer ownership horizon. Test the cost if you need to exit early.

If a decision only wins under one optimistic estimate, it is fragile. A slightly more expensive option may be preferable when its cash flow and risks are easier for your household to carry.

The useful question is not “Is leasing always bad?” or “Is buying always smarter?” It is “Which complete set of costs, assets, limits, and obligations fits this driver over this period?”