Used vs New Car
A new car is shiny, fully warrantied, and yours alone — but it loses the most value in its first few years, and you pay for every dollar of that. A used car lets someone else absorb that first hit, though it may cost you more at the shop. The real cost of owning a car isn't the sticker price — it's depreciation, the value that quietly evaporates while you drive. This compares both on your numbers.
Your numbers
This isolates the depreciation + maintenance question — the true cost of owning each car over the years you keep it. It excludes financing interest, insurance, and fuel, which are roughly similar across two comparable cars or too variable to model honestly (financing APRs are often higher on used cars; insurance often higher on new). Enter your real numbers for the truest answer.
New car
Full warranty and the latest everything — but it sheds the most value in the early years, and that loss is real money.
Total cost of ownership over 7 years
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Depreciation
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Estimated resale value
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Maintenance total
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Cost per year
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Used car
Someone else already ate the steep first-year drop — but you may spend more at the shop keeping it on the road.
Total cost of ownership over 7 years
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Depreciation
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Estimated resale value
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Maintenance total
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Cost per year
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Cumulative cost over time
Depreciation is the real cost
The number that actually costs you money isn't the price on the windshield — it's depreciation, the value the car quietly loses while you own it. A new car sheds value fastest in its first years: a chunk of it the moment you drive off the lot, then steadily as the odometer climbs and newer models arrive. By the time you sell, the gap between what you paid and what it's worth is the single biggest line item in owning the thing — bigger than fuel, bigger than insurance, bigger than maintenance.
That's the quiet appeal of buying used. You let the first owner absorb the steepest part of the depreciation curve, then buy the same car for thousands less after the worst of the drop has already happened. The car still loses value, but more slowly, and from a lower starting point — so the dollars you watch evaporate are fewer.
When new is worth it
Used isn't automatically the smart move. New cars earn their premium when:
- You want the full warranty and maximum reliability. A new car comes with a clean history and a bumper-to-bumper warranty, so the early years are nearly worry-free — no surprise repair bills, no unknown previous owner.
- You want the latest safety and efficiency. Newer cars bring better crash protection, driver-assist tech, and fuel or energy efficiency that a few-year-old model may lack.
- You keep cars a very long time. Depreciation is front-loaded, so if you hold a car 10+ years the painful early drop gets spread thin — the depreciation gap between new and used shrinks per year, and the new car's longer trouble-free stretch starts to pay for itself.
What this excludes
To keep the comparison honest, this leaves three big costs out — and they don't all favor the same side:
- Financing interest. Loan APRs are frequently higher on used cars than new (new-car loans are often subsidized by manufacturers). If you're borrowing, that can erode part of the used car's price advantage — check both rates before you decide.
- Insurance. Premiums are often higher on a new car, because it costs more to replace. That tilts slightly toward used.
- Fuel. For two comparable cars, fuel is roughly similar, so it mostly cancels out and isn't modeled here.
The lightly-used sweet spot
If you want most of the used-car savings without most of the used-car risk, look at a 2-to-3-year-old off-lease car. By then it has already taken the bulk of its depreciation hit, so you buy near the bottom of the steep part of the curve — yet it's often still inside the original factory warranty or eligible for a certified-pre-owned program. You get a car that's nearly new, with a known maintenance history, for a price that reflects someone else's first-year loss. That's the spot where the depreciation math and the reliability math line up best.
FAQ
Why does a used car depreciate slower (in %)?
Because the steepest part of the curve is already behind it. A new car loses the most value in its first year or two — the drive-off-the-lot drop plus the early model-year decline. A used car has already taken that hit, so it's depreciating from a lower base and along the flatter part of the curve. That's why we default the used car to a lower percentage-per-year than the new one: the same car loses value faster when it's brand new than it does a few years later.
Aren't repairs riskier on used?
Yes — that's a real cost, and we model it by defaulting the used car's maintenance to a higher number than the new car's. A used car is out of warranty sooner (or already), has an unknown history, and is closer to the age where wear items start to fail. The way to narrow that gap is a certified-pre-owned car: it comes with an extended manufacturer warranty and an inspection, which lowers your expected repair bills toward new-car territory. If you're buying CPO, drop the used-maintenance number to reflect that.
What about financing rates?
They're not modeled here, and they often cut against the used car. Auto-loan APRs are frequently higher on used cars than new ones — partly because manufacturers subsidize new-car financing to move inventory. So a used car that wins on depreciation can give some of that back in interest if you borrow. This calculator compares the cash cost of ownership; if you're financing, get the real APR for both and run the loan numbers separately before you decide.