How to Decide: Lease vs Buy

Lease or buy is one of the most common and most mis-argued personal finance decisions. The loudest voices say “leasing is a rip-off” or “buying is a waste of capital.” Both statements are too simple. The actual answer depends on how long you’ll keep the vehicle, how many miles you drive, how much you value new features, your tax situation, and where the car sits on its depreciation curve. This guide compares total cost of ownership for both options, explains residual values, mileage caps, business-use deductions, and walks through the specific scenarios where leasing beats buying — and the many more where buying (especially used) wins.

1. What you’re actually paying for

Buying: you pay for the whole vehicle (minus trade-in), keep it until you sell, and absorb all the depreciation.

Leasing: you pay for the depreciation that happens during the lease term plus a financing charge (money factor), then hand the car back.

lease payment ≈ (cap cost - residual value) / term + money factor + tax

If a $45,000 car is worth $27,000 after 36 months, you’re financing $18,000 of depreciation plus interest over 36 months = ~$550/month. Buying the same car with a loan would be $750/month, but you keep an asset worth $27k at the end.

2. Total cost of ownership over time

5-year comparison on a $40,000 sedan:

Buy (60-month loan, 6%):
  Payments:       $46,400
  After 5 years:  worth ~$18,000
  Net cost:       $28,400

Lease (3-year then new 3-year):
  Payments (6 yr): $42,000
  Residual at 6:   $0
  Net cost:        $42,000

Over 5-6 years, buying is typically $10k-20k cheaper. The gap widens the longer you keep the car.

3. The depreciation curve

A new car loses ~20% of value in year 1, another ~15% in year 2, then ~10% per year through year 5. Years 1-3 are the most expensive years of ownership per mile.

• Year 0-3: ~40-50% depreciation (lease sweet spot)
• Year 3-6: ~20% depreciation
• Year 6-10: ~10-15% depreciation

Buying 2-3 year-old used captures the post-depreciation value phase. This is why buying used is the mathematically dominant option for most households.

4. Residual value explained

The residual is the manufacturer’s guaranteed buyback price at lease end. High residuals = cheaper lease payments. Different models have very different residuals: Toyota and Honda hold value best, German luxury and most EVs depreciate fast. When comparing leases, look at residual as % of MSRP after 36 months — 55%+ is excellent, below 45% means steep lease payments.

5. Mileage caps

Standard leases allow 10,000, 12,000, or 15,000 miles per year. Excess mileage costs $0.15-0.30 per mile. A driver who logs 20,000 miles/year on a 12,000-mile lease faces $7,200-14,400 in overage over a 3-year lease. If you drive more than 15k/year, leasing is almost always wrong. Higher-mileage lease packages exist but price in the extra depreciation up front.

6. The money factor

Leases hide the interest rate as a “money factor.” To convert:

APR ≈ money factor × 2400

Money factor of 0.00250 = roughly 6% APR. Always ask for the money factor and compare it to a typical auto loan rate. Dealers mark up the money factor for profit just like they mark up loan rates.

7. When leasing actually makes sense

• Business use with tax deductions. If the vehicle is primarily for business, lease payments (including the business-use %) are deductible, often more favorably than a purchase.
• You always want the newest model. Someone who would replace a car every 3 years regardless spends similar money either way, but leasing skips the sale hassle.
• You want warranty coverage for the whole period. Leases typically match the 3-year bumper-to-bumper warranty window.
• Electric vehicles with tech risk. EV tech is improving fast and batteries degrade. Leasing offloads that risk to the manufacturer.
• High residual + low money factor promos. Manufacturer incentives occasionally make a specific lease cheaper than equivalent financing.

8. When buying is obviously better

• You keep cars for 6+ years
• You drive more than 15,000 miles/year
• You have kids, pets, or hobbies that wear interiors (lease damage fees)
• You want to modify the vehicle
• You have the cash or can afford the payment without stretching
• You can buy 2-3 year old used with low mileage

9. Buy used: the quiet win

A 3-year-old certified pre-owned (CPO) vehicle from a major brand:

• Costs ~60% of new MSRP
• Often has remaining factory warranty
• Has already weathered the steepest depreciation
• Continued ownership drives out TCO/year

For most households, this is the financially optimal path. New-car leasing and new-car buying both lose to CPO on a 10-year cost basis.

10. Lease-end options

At lease end you can:

• Return the car (most common)
• Buy it at the residual value (sometimes a good deal if market value is higher)
• Trade in for another lease or purchase

In 2021-2023, used car values spiked and residuals set in 2020 were suddenly below market — lease buyouts became the best auto deals available. Always check market value against residual before returning the car.

11. Gap insurance and wear-and-tear

Leases almost always require gap insurance (covers the gap between what you owe and what the car is worth if totaled). Often built into the lease. Wear-and-tear charges at return can be significant: dings, scratches beyond a credit-card-size, stained upholstery, excess mileage, even unusual tire wear. Budget for $500-2,000 at return.

12. The psychological trap

Lease marketing leans hard on monthly payment: “Only $399/month!” This anchors on payment, not total cost. A $399 lease on a $55k car that you replace every 3 years is $143,600+ over 30 years with nothing to show. The same 30 years of buying-and-keeping-for-10 years costs $90-100k and leaves you with a working vehicle at year 30.

13. Common mistakes

• Comparing lease payment to loan payment. Different products; compare total 6-year or 10-year cost.
• Ignoring mileage reality. “I’ll drive less next year.” You won’t.
• Signing a high money factor. Always negotiate the money factor — dealers rarely offer the best they can do.
• Treating lease as renting. You’re still on the hook for maintenance, insurance, damage, and excess mileage.
• Leasing without doing the 5-year math. Run the numbers both ways, at least once.

14. Run the numbers

Enter the car price, loan terms, lease payment, residual, and expected annual mileage to see which comes out ahead over your planned ownership period.

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