Car lease vs. buy: how to calculate the true cost

The car dealership will happily compare a lease payment to a loan payment for the same car. That comparison is almost always misleading. A monthly lease payment is lower than a monthly loan payment — but that’s because a lease payment is the cost of using the car, while a loan payment is the cost of owning it.

The right comparison is total cost over your holding period, accounting for what you actually walk away with at the end.

The lease equation

When you lease a car, you’re paying for its depreciation during the lease term, plus a “money factor” fee (the dealer’s word for interest), plus fees. At the end of the lease term — typically 36 or 39 months — you hand the car back. You have no asset, no equity, nothing.

The total cost of a lease over, say, five years is:

Lease cost = (monthly lease payment × 60 months) + acquisition fee × 2

Why × 2? If your lease term is 36 months, covering 5 years requires roughly 1.67 lease cycles — so you’ll face two acquisition fees (one per lease cycle). Each new lease also means another round of negotiation, another credit pull, and you’re permanently renting.

The buy equation

Buying looks more expensive upfront — down payment, loan payments, and the nagging knowledge that cars depreciate. But the critical piece the monthly-payment comparison ignores: you own a depreciating asset.

The true net cost of buying is:

Buy net cost = down payment + loan payments − residual value at hold-period end

The residual value is what the car is worth when you’re done with it — either as a trade-in or private sale. That value isn’t zero (unless you drive a 20-year-old beater into the ground). It’s a real asset that offsets your total outlay.

Typical US depreciation:

Year	Depreciation
Year 1	−20% of original value
Year 2	−15%
Years 3–5	−12%/year
Year 6+	−10%/year

A $35,000 car is worth roughly $19,000 after 5 years under this model. That $19,000 isn’t in your pocket if you leased — it’s returned to the dealer.

The crossover point

In the first year or two of ownership, leasing often is cheaper in net-cost terms. The down payment and early loan payments pile up quickly, and the car hasn’t depreciated enough yet for you to have built meaningful equity.

But as time goes on, your cumulative loan payments grow while the car retains some residual value. At some point, buying crosses over to being cheaper.

The car lease vs. buy calculator shows this crossover on a chart — the month where the buy curve dips below the lease curve. For most $30–40k vehicles at typical rates, the crossover happens somewhere between 2 and 4 years in.

The implication: if you only keep cars for 2–3 years, leasing can genuinely be the cheaper option. If you keep them for 5+ years, buying almost always wins.

What leasing actually costs you

Consider a $35,000 car with a $450/month lease on a 36-month term:

• Lease acquisition fee: $695 (charged at each new lease cycle)
• Hold period: 5 years (two lease cycles: 36 + 24 months)

Lease cost = $450 × 60 + $695 × 2 = $27,000 + $1,390 = $28,390

Now the buy scenario, same car:

• Down payment: $3,000
• Loan: $32,000 at 6.5% APR for 60 months → ~$624/month
• Total loan payments: ~$37,440
• Residual value at 5 years: $35,000 × ~0.55 ≈ $19,250

Buy net cost = $3,000 + $37,440 − $19,250 = $21,190

Buying saves about $7,200 over 5 years in this example — and that gap widens the longer you hold.

The mile and condition traps

Leases come with mileage limits — typically 10,000–15,000 miles per year — and condition requirements. Overages cost $0.15–$0.25/mile and are assessed at lease-end. A driver who puts 18,000 miles/year on a car with a 12,000-mile annual limit faces $900–$1,500 in overage fees per year. That changes the math significantly.

The calculator doesn’t model mileage overages. If you drive a lot, apply a manual adjustment to the monthly lease payment or add the expected overages to the acquisition fee field.

New car every 3 years vs. asset building

The psychological appeal of leasing is real: you always drive a new car, you’re always under warranty, you never deal with a transmission going out at 80,000 miles. These are legitimate quality-of-life values.

But there’s a financial cost: you never stop paying. A lease is a subscription to a car. Buying — and keeping the car after the loan is paid off — converts your car payment into zero. Every month you drive a paid-off car is a month you’re “making money” relative to both a lease and a new loan payment.

Many personal-finance practitioners call this “driving the loan payment away” — once the car is paid off, you’re well ahead of where you’d be if you’d leased.

How loan rate affects the comparison

A high loan APR tilts the math toward leasing. If you can only qualify for a 12% loan, the loan payments are meaningfully higher, and the lease (which effectively embeds a money factor that might be equivalent to 5–7% APR for a good-credit customer) can win even over long hold periods.

Shopping the loan separately from the car — through a credit union or bank before you set foot on the lot — is the single most effective way to ensure the buy option is competitive.

Taxes and fees: what the calculator omits

Both buying and leasing come with state and local taxes. The tax treatment differs by state:

• Buying: sales tax is typically charged once on the full purchase price (or financed amount) at the time of sale.
• Leasing: in most states, tax is charged only on the monthly payment, not the full vehicle value. In high-tax states (California, for example), this can make leasing more tax-efficient in the short term.

Registration, title fees, and dealer documentation fees apply to both. The calculator omits these because they’re highly state- and dealer-specific, but they’re worth factoring in for a real decision — especially for states with high registration fees on newer vehicles.

Maintenance: a word about warranties

New cars sold in the US come with a manufacturer warranty — typically 3 years/36,000 miles bumper-to-bumper and 5 years/60,000 miles powertrain. A 36-month lease fits neatly within the 3-year warranty window. You’ll almost never pay for an unexpected repair.

When you buy and hold for 5–7 years, years 4–7 are usually out of warranty. Unexpected maintenance is possible. A well-maintained, modern car is generally reliable for 150,000+ miles, so this shouldn’t be paralyzing — but it’s a real risk that’s hard to quantify in advance.

Using the calculator

The car lease vs. buy calculator takes:

1. Vehicle price — the negotiated purchase price, not the sticker.
2. Down payment — cash outlay at purchase.
3. Loan APR and term — match a quote from your credit union or bank.
4. Monthly lease payment and term — from the advertised deal.
5. Lease acquisition fee — typically $595–$895 per lease cycle.
6. Hold years — how long you actually keep a car.

The chart shows cumulative net cost month by month and highlights the crossover point where buying becomes cheaper. The “Buy wins here” marker tells you whether your intended hold period is on the right side of that line.

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This article is educational, not financial, tax, or legal advice. Vehicle depreciation varies significantly by make, model, condition, and market. Consult a financial advisor before making a significant vehicle purchase.