Buy New, Lease, or Buy Used: How to Actually Decide

Every “buy vs. lease vs. used” article says the same three things and stops there. Here’s the part that actually matters: which one is right for you depends on exactly one question first, then a few follow-ups.

Start here: how long do you actually keep vehicles?

This is the single biggest factor, and most comparisons skip it.

• You trade in every 2-3 years, no matter what you buy. Leasing is usually the better financial fit — you’re already accepting the fastest depreciation hit either way, so you might as well not own the depreciation. New-car ownership only “wins” over leasing once you keep the car long enough to drive it well past when payments end.
• You keep vehicles 7+ years. Buying (new or used) wins here almost every time. Leasing repeatedly over a long horizon means you never stop making a payment; buying means the payments eventually end and you keep driving.
• Somewhere in between (4-6 years)? This is genuinely close, and depends more on the next two factors than on this one.

The used-car question is separate from buy-vs-lease

“Buy new” and “buy used” aren’t really the same decision as “buy vs. lease” — used is really its own axis:

• Used makes the most sense when you want to minimize the depreciation you personally absorb (someone else already took the first-year hit), and you’re comfortable with less warranty coverage and a less predictable maintenance history.
• It makes less sense if the vehicle class you want has weak used-market supply, or if a manufacturer incentive (subsidized financing, cash back) makes new pricing unusually close to used pricing for a specific model — this happens more often than shoppers expect, and it’s worth actually checking both before assuming used is automatically cheaper.

What actually moves the math, beyond time horizon

• Mileage. Leases cap annual mileage (commonly 10,000-15,000/year) with real per-mile overage charges. If you drive a lot, leasing’s advantage shrinks or disappears — run your actual annual mileage against a specific lease’s cap before assuming it’s the cheaper option.
• How you use the vehicle. Leases typically restrict modifications and can penalize excess wear at turn-in. If that’s not how you treat a vehicle anyway, this doesn’t matter. If it is, factor it in.
• Financing rate you actually qualify for, on both the loan and lease side — this varies by credit profile and by the specific manufacturer’s current incentives, not by any general rule, so it has to be checked per-purchase rather than assumed.

The honest bottom line

There’s no universally “smarter” choice between these three — the personal-finance internet oversimplifies this into a moral argument (buying = smart, leasing = wasteful) that doesn’t hold up once you actually run your own numbers: your time horizon, your mileage, and the specific financing/incentive offers available on the vehicle you’re actually looking at.