Lease vs. Buy and Trade-In Equity Guide

Do not let the monthly payment choose the comparison

A lower monthly payment can come from a different term, different upfront cash, a lower financed amount, a different residual structure, or costs that appear at the end. The Consumer Financial Protection Bureau and Federal Trade Commission both emphasize reviewing the complete transaction terms rather than relying on a payment alone. Start with written numbers: cash due at signing, every payment, lease-only costs, expected excess-mile and end charges, purchase amount financed, purchase-only costs, and the estimated value and payoff position at the same ending point.

Use the written lease term as the shared horizon

When comparing a written three-year lease with a purchase, count the lease payments and expected end charges through that three-year end. On the purchase side, include payments made through the same 36 months, the remaining payoff at that point, selling or trade costs, and the estimated vehicle value. Do not compare a full lease term with a five-year purchase total, and do not silently assume a second lease after the first one ends. The result is a planning comparison, not a forecast of resale value or a recommendation.

Keep trade equity separate from the next vehicle price

Trade equity starts with a simple calculation: written trade offer minus current lender payoff quote. A positive result may reduce the next transaction's amount financed if the written deal applies it that way. A negative result is a payoff gap. The FTC warns consumers to understand when negative equity is added to a new financing contract, so record the gap separately before mixing it with vehicle price, cash down, rebates, taxes, and fees. That makes it easier to see whether a lower payment is hiding more debt.

Use a payoff quote rather than a statement balance

A lender payoff quote is tied to an amount and date needed to satisfy the existing loan. A statement balance may not include interest or other timing differences required to release the lien. Request the payoff quote in writing, note its expiration date, and compare it with the written trade offer. Recheck if the sale or trade date changes. The calculator does not verify either document or determine whether a dealer will honor an offer.

Read the new contract before moving to a payment estimate

If a gap is paid in cash, record that cash separately. If it is rolled into the new loan, the written amount financed should reflect it alongside the new vehicle's price, any taxes and fees, cash down, and verified credits. Only then is it sensible to run a payment scenario. The current transaction may have rate, term, product, and tax details that affect the payment, and a payment calculation cannot decide whether the deal is affordable or advantageous.

Which vehicle-financing question are you trying to answer?

Real examples

• A 36-month lease comparison should include all 36 entered monthly payments, nonrefundable upfront cash excluding the first payment, lease-only monthly costs, expected excess-mile charges, and expected end fees—not just the advertised monthly payment.
• For a purchase measured over that same 36 months, include upfront cash, the modeled payments through month 36, remaining payoff, selling costs, and subtract the estimated vehicle value at month 36. A five-year loan can still have a remaining balance at that point.
• If a written trade offer is $18,000 and the lender payoff quote is $21,000, the trade position is negative $3,000. Applying $1,000 in cash leaves a $2,000 gap to handle explicitly before interest in the next transaction.

Mistakes to avoid

• Comparing a lease payment with a purchase payment instead of complete written costs.
• Using different time horizons for lease and purchase paths.
• Counting the first lease payment twice in upfront cash and monthly payments.
• Using a statement balance instead of a current lender payoff quote.
• Assuming a trade offer is an appraisal or a guaranteed dealer commitment.
• Letting negative equity disappear inside the next amount financed or monthly payment.
• Treating estimated resale value as a guaranteed future sale price.

When this estimate is not enough

• You do not have written lease, purchase, payoff, or trade numbers yet.
• You need a current credit decision, lender approval, or dealer quote.
• The transaction involves an early lease termination, disputed payoff, title issue, or contract dispute.
• You need legal, tax, or individualized financial advice.

Source notes

• CFPB explains key distinctions between leasing and buying, including equity and contract costs, supporting the guide's emphasis on complete written terms rather than a payment alone.
• FTC consumer guidance explains both vehicle financing or leasing terms and the risks of rolling negative equity into a new transaction, supporting the guide's separate payoff-gap check.

Sources

Source boxes list references used for factual claims, safety notes, energy rates, product-sizing conventions, or official data points.

• Consumer Financial Protection Bureau: leasing versus buying a car
• Federal Trade Commission: financing or leasing a car
• Federal Trade Commission: auto trade-ins and negative equity
• Consumer Financial Protection Bureau mortgage resources
• Consumer Financial Protection Bureau credit cards