Depreciation Is the Bill You Never See

Every other cost of running a car announces itself. Fuel is a transaction, insurance is a bill, a repair is a phone call from a shop. Depreciation is the one large cost that never asks you for money, and so it stays out of the calculation until the day you try to sell or trade the car and find out what it is now worth.

It is not a bookkeeping abstraction. It is the difference between the money you put into the car and the money you can get back out, and on a recent model it is frequently larger than fuel, insurance and servicing combined.

Key figures

• $11,000 Example: newer car's value lost over four years
• $3,200 Example: older car's value lost over four years
• $800 Example: older car's value lost each year

How to measure it without guessing

Look up what your exact car, with your mileage and condition, is being offered for today by private sellers in your area. Do the same for what it was worth twelve months ago, which you can approximate from listings for a car one year older with about 12,000 fewer miles. The difference is your depreciation for the year.

Two things make this more useful than a percentage from an article:

• It is your model, in your market, at your mileage.
• It captures the market you are actually in, which moves. Used car prices are not stable: they surged in the early 2020s when new vehicles were scarce, then fell back. A rule of thumb calibrated on one of those periods is wrong in the other.

Why it is mostly a calendar cost

Mileage matters to a buyer, but so do model year, body condition, service history and whether the model has been replaced by a newer generation. A car that sat in a garage all year still moved a year further from the current model, and it lost value for it.

That has two consequences worth holding on to:

1. Driving more spreads the same loss over more miles. A car you drive 20,000 miles a year is cheaper per mile than the identical car driven 5,000, even though it loses slightly more value in total.
2. Keeping a car parked is expensive. A second car that barely moves is still costing depreciation, insurance and registration. That is the case for getting rid of it, and it never shows up in a fuel log.

The shape of the curve

Value falls fastest when the car is new and flattens as it ages. The exact rate varies enormously by model, drivetrain and the state of the market, so treat any single percentage with suspicion. The shape, however, is consistent, and it drives three practical conclusions.

• A two or three year old car has had its steepest loss paid for by somebody else, while usually retaining factory warranty coverage.
• The cheapest years of a car to own, on depreciation alone, are the later ones, which is the opposite of how most people feel about them.
• An old car cannot fall far. Once a car is worth $4,000, the most it can lose in a year is a fraction of that, so the annual cost of ownership becomes mostly fuel, insurance and repairs.

A worked example

Two households, both driving 12,000 miles a year. One buys a three-year-old car for $22,000 and keeps it four years; the other keeps a paid-off ten-year-old car for the same four years. Depreciation only, using illustrative resale values:

The older car would have to absorb about $1,950 a year in extra repairs before the two paths cost the same, before you even count the difference in insurance and registration. Those numbers are an illustration rather than a measurement, but the structure holds whatever values you substitute: the newer car starts with far more value to lose.

What genuinely slows it down

Not much, but some things help, and none of them are exotic.

• Keep the service records. A complete history is the cheapest evidence a buyer can be given.
• Fix the cosmetics that are cheap to fix. Kerbed wheels, a cracked windscreen, a missing trim piece. These cost a buyer nothing to notice and a lot to ignore.
• Avoid the modifications you cannot undo. They narrow the pool of buyers.
• Deal with rust early in states that salt the roads. Corrosion is the one condition that closes a car’s remaining life outright.
• Choose the boring colour if you are buying with resale in mind. It is a small effect but it is free.

What does not help is driving less. The fixed portion happens anyway, and you get fewer miles out of it.

The ownership budget separates depreciation from loan principal to avoid counting the purchase twice. For financed vehicles, the GAP cost guide explains the debt shortfall that can remain after a total loss. The car wash membership comparison prices a recurring upkeep service separately from resale-value loss.

Questions people ask

How much does a car depreciate per year?

It varies too much by model, drivetrain and market conditions for a single number to be useful. Measure yours directly: compare current asking prices for your car against asking prices for the same model a year older with about 12,000 more miles.

Is depreciation really a cost if I never sell the car?

Yes, but it ends. If you drive a car until it is worth nothing, you pay the whole purchase price as depreciation, spread across all the years you drove it. The longer you keep it, the smaller that becomes per year, which is why long ownership is cheap.

Does mileage or age matter more for value?

Both, and neither dominates on its own. Buyers price model year, odometer reading, condition and service history together. A parked car still loses value because the model year advances regardless of use.

Is buying a three-year-old car the cheapest option?

It avoids the steepest part of the depreciation curve while often retaining some factory warranty, which is why it is a common recommendation. Keeping a reliable car you already own is usually cheaper still, because there is no new purchase price to lose value.

Where these figures come from

1. Standard mileage rates Internal Revenue Service · irs.gov
2. US Vehicle Age Rises Again to 12.8 Years in 2025 S&P Global Mobility · press.spglobal.com

Figures last checked September 2026.