Enter the purchase price, an annual depreciation rate, and the number of years owned to see
the car's estimated remaining value, the total amount lost to depreciation, and the average
annual cost. The math uses a flat compound rate — a reasonable approximation over a full
ownership period, though real depreciation is front-loaded in the first few years.
Remaining value & total loss·Average annual depreciation cost·Year-by-year breakdown
Read this first
This tool uses a simplified flat compound rate — the same percentage applied each year
to the remaining value. Real depreciation is steeper in year one (often 20–25% off
MSRP the moment you drive off the lot) and slower in later years. The result here is a useful
estimate for planning and comparison, not an appraisal. For an accurate current market value,
check Kelley Blue Book, Carfax, or a dealer appraisal. This is not financial
advice.
Enter the original purchase price, an annual depreciation rate, and the number of years owned. The calculator shows remaining value, total value lost, and average annual depreciation, plus a year-by-year table.
The full price you paid — not the monthly payment.
15% is a common rule of thumb for mainstream cars.
How many full years you plan to own (or have owned) the vehicle.
Remaining value
Total depreciation
Average per year
Value remaining
Year-by-year breakdown
Year
Value at startof year
Lost this yearat rate
Value at endof year
The math, honestly
How depreciation is calculated
This calculator uses flat compound depreciation: each year the car loses
the same percentage of its current value, not the same dollar amount. The formula
for the value after n years is:
value = price × (1 − rate)^years.
With the default inputs — $30,000 purchase price, 15% annual rate, 5 years —
the math runs: 30,000 × 0.85^5 = 30,000 × 0.4437 = $13,311.16.
Total depreciation is the purchase price minus that remainder:
$30,000 − $13,311.16 = $16,688.84. Divided across five years, the
average annual cost is $16,688.84 ÷ 5 = $3,337.77.
About 44.4% of the original value remains.
Why this is an approximation: in the real world, a new car typically
loses a larger chunk in year one — often 15–25% off the purchase price the
moment it leaves the lot — and the rate slows in later years. The flat model
smooths that curve into equal annual percentages. It underestimates early loss and
slightly overestimates later loss, but it produces a reasonable lifetime average and
makes comparison between vehicles straightforward. For a precise current market value,
use an appraisal or a real-time pricing tool.
Value remaining on a $30,000 car by depreciation rate
How much a $30,000 car is worth after 1, 3, and 5 years at a range of common annual
depreciation rates — all computed with the same
price × (1 − rate)^years formula the calculator uses.
Annual rate
After 1 year
After 3 years
After 5 years
After 10 years
10%
$27,000
$21,870
$17,714
$10,470
15%
$25,500
$18,409
$13,311
$5,921
20%
$24,000
$15,360
$9,830
$3,222
25%
$22,500
$12,656
$7,119
$1,686
30%
$21,000
$10,290
$5,042
$848
Starting price $30,000, compound flat-rate model. Figures rounded to the nearest dollar.
Real depreciation is front-loaded — these numbers are a planning estimate, not an
appraisal. Enter your own price and rate in the calculator above.
Reading the result
Three numbers come out of the calculator. Here's what each one actually means for how
you think about a car purchase.
Remaining value — what the car is worth now
This is the model's estimate of the car's current market value based purely on the purchase price, rate, and time. It's a starting point: condition, mileage, accident history, and local market demand all shift the real number. Think of it as a sanity check against what dealers and private sellers are asking.
Total depreciation — the invisible cost of ownership
This is the money you've spent that left no receipt. Unlike fuel or insurance you can point to a bill for, depreciation is silently deducted from your net worth every year you own the car. For most drivers it's the largest single component of annual vehicle cost — larger than fuel or insurance — yet it's the one most easily ignored because no one sends you an invoice for it.
Average annual cost — the real per-year price of the car
Dividing total depreciation by years owned gives you a flat annual figure that's useful for comparing vehicles or time horizons. A car that depreciates $4,000 a year costs that much more to own than one depreciating $2,500 per year, regardless of what either one costs to fill up. Adding this to your annual fuel, insurance, and maintenance costs gives a much more honest picture of what a vehicle actually costs you.
Front-loading: why the first year hurts most
The flat compound model distributes loss evenly in percentage terms, but in dollar terms early years cost more because the starting value is higher. A 15% loss on $30,000 is $4,500; a 15% loss on $13,311 (year-five value) is $2,000. Real cars exaggerate this further: the "new car premium" typically vaporizes within months of leaving the lot, and the rate slows from there. The year-by-year table in the calculator shows how this plays out in the flat model.
Depreciation glossary
The terms behind the calculator, in plain English.
Depreciation
The reduction in a vehicle's value over time. Every car depreciates — it's a cost of ownership, not a freak occurrence. The question is how fast, which depends on make, model, mileage, condition, and market demand.
Flat compound depreciation
A model where the car loses the same percentage of its current value each year. At 15%, a $30,000 car loses $4,500 in year one; but in year two it starts at $25,500 and loses $3,825 — a smaller dollar amount. The formula is price × (1 − rate)^years.
Residual value
What the car is worth at the end of a given period — the remaining value this calculator outputs. In leasing, the residual value is set upfront and determines your monthly payment; a higher residual means lower payments because you're financing a smaller portion of the car's life.
Straight-line depreciation
An alternative model where the car loses a fixed dollar amount each year rather than a fixed percentage. Simpler, but less realistic for vehicles. This calculator uses the compound (percentage) model, which better reflects how value actually falls.
Front-loaded depreciation
The real-world pattern where a car loses a disproportionately large share of its value in the first one to two years. The "new car premium" evaporates quickly once the vehicle is titled and becomes used. This calculator smooths that into a flat rate; the actual curve is steeper early and shallower later.
Total cost of ownership (TCO)
The full cost of owning a vehicle over a period: depreciation + fuel + insurance + maintenance + financing interest + taxes and fees. Depreciation is typically the single largest line item for new cars. The annual depreciation this calculator produces is one input into that full picture.
Frequently asked
A common rule of thumb is roughly 15 to 20 percent of remaining value per year for mainstream passenger cars, though the first year is often steeper — sometimes 20 to 25 percent off the original purchase price as soon as the car leaves the lot. After that the rate tends to slow. Trucks and certain SUVs typically hold value better; luxury sedans and discontinued models often depreciate faster. The calculator above uses a flat annual rate applied to remaining value (compound depreciation), which averages out the front-loading over a multi-year ownership period.
The flat compound depreciation formula is: remaining value = purchase price × (1 − annual rate)^years. For a $30,000 car at 15% per year for 5 years: 30,000 × 0.85&sup5; = $13,311.16. Total depreciation is $30,000 − $13,311.16 = $16,688.84, and the average annual cost is $16,688.84 ÷ 5 = $3,337.77. About 44.4% of the original value remains. This is an approximation — real depreciation is front-loaded.
A new car loses value quickly at first because buyers pay a premium for a factory-fresh vehicle with no history or unknown wear. The moment it leaves the lot it becomes a used car, which carries uncertainty even if nothing has actually changed about it. Year-one drops of 15–25 percent are common. After that initial cliff the rate slows, because most of the new-car premium has been extracted. This is why a one- or two-year-old car with low miles is often a better value proposition than buying new.
Mileage is the biggest single factor — high annual mileage accelerates depreciation more than almost anything else. Brand and model reputation matter a lot: vehicles known for reliability (many Japanese makes, certain trucks and SUVs) hold value better than average, while luxury sedans and discontinued models often depreciate sharply. Color, trim level, accident history, and service records all affect resale value. Broader market conditions — fuel prices, interest rates, and consumer preferences — shift demand across entire vehicle segments. None of those variables appear in the flat-rate model here; this calculator is a starting-point estimate, not a precise forecast.
No, but depreciation is typically the single largest component of the true cost to own. Total ownership cost also includes fuel, insurance, maintenance, financing interest, registration, and taxes. AAA consistently finds that depreciation accounts for roughly a third to half of total annual ownership costs for most new vehicles — more than fuel for average drivers. That's why the average annual depreciation figure this calculator produces is worth knowing: it's the portion of your car's cost that leaves no receipt.
It's a useful approximation, not a precise forecast. Real depreciation is front-loaded — a car loses a larger share of value in the first couple of years than later. The flat compound model smooths that into equal annual percentages, which underestimates early loss and slightly overestimates later loss. For comparing vehicles or planning ownership costs, it's reasonable. For an accurate current market value, use a real-time source like Kelley Blue Book, Carfax, or a local dealer appraisal — those reflect actual transaction prices for your specific make, model, trim, mileage, and condition.
Common mistakes
Depreciation estimates go wrong most often when people assume the loss is evenly distributed over time, or use the wrong starting value.
Assuming depreciation is linear when it is front-loaded
New cars lose a disproportionate share of value in the first year — commonly cited at 15–25% — and continue declining steeply through years two and three before the curve flattens. A straight-line model (same dollar loss per year) understates early-year loss and overstates late-year loss. This calculator uses a flat-rate percentage model, which is an approximation. Real depreciation varies by make, model, mileage, condition, and market conditions.
Using MSRP as the depreciation base instead of what you paid
If you negotiated $3,000 below sticker, your car started depreciating from your purchase price, not the manufacturer's suggested retail price. Using MSRP as the starting value overstates how much value you are "losing" relative to your actual investment. It also inflates the percentage loss calculation in any model that divides dollar loss by original value.
Ignoring that mileage and condition affect depreciation rate independently of age
A 3-year-old vehicle with 80,000 miles depreciates faster than the same vehicle with 30,000 miles, independent of the calendar year. Depreciation models based purely on age do not capture this. For a realistic resale estimate, cross-check the calculator result against current market listings for comparable vehicles at your actual mileage — tools like Carfax or a dealer trade-in estimate reflect real market conditions this model cannot replicate.
Conflating depreciation with total cost of ownership
Depreciation measures value lost on the asset. Total cost of ownership adds insurance, maintenance, fuel, financing interest, and registration fees on top of that. A car with slow depreciation but high insurance and maintenance costs can be more expensive to own per year than a faster-depreciating model with low running costs. Depreciation is an important component of ownership cost, not a complete measure of it.