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Car Depreciation Calculator

Estimate car value, total depreciation, value lost percentage, and next-year value from first-year and later annual depreciation rates.

Published

Estimated value
Value after 3 years
$20,230.00
Total depreciation
$14,770.00
Value lost
42.2%
Estimated value in one more year
$17,195.50

$35,000.00 depreciated at 20% in year one and 15% per year afterward.

The price when the vehicle was new or when you bought it.
$
How many years the car has been in service.
yr
New cars often lose the largest share of value in the first year.
%
The yearly value loss after the first year.
%

Results update as you type.

Car Depreciation Calculator

The car depreciation calculator estimates how much value a vehicle may retain after a chosen age. It uses one depreciation rate for the first year and another annual rate after that. The output shows estimated current value, total depreciation, percent of the original price lost, and estimated value in one more year.

This tool is designed for vehicle value decline, not a fixed-asset accounting schedule. For book depreciation methods, use the depreciation calculator. For depreciation recorded so far against a business asset, use the accumulated depreciation calculator. If you are planning ownership costs, pair this estimate with the auto loan calculator, loan calculator, and budget calculator.

Inputs and exact compute behavior

Original purchase price is the value you want to depreciate from. It can be the new-car price, your purchase price, or a current value if you want to model future depreciation from today. Car age is measured in years and can include decimals. First-year depreciation is the percent loss applied through age one. Later annual depreciation is the percent loss compounded after the first year.

The form validates that price and age are nonnegative and that both rates are at least zero and less than 100%. The input controls cap rates at 95%, while the calculator rejects rates of 100% or more. There is no mileage input, condition input, or salvage floor. The result is entirely rate-based, so choose assumptions carefully.

Formula for cars up to one year old

For an age of one year or less, the calculator prorates the first-year depreciation rate:

current value=price×(1−first-year rate×age)\text{current value} = \text{price} \times (1 - \text{first-year rate} \times \text{age})

This means a 20% first-year rate at age 0.5 years removes 10% of the starting price. It is a simple prorated model, not a market curve by month.

Formula after the first year

For ages greater than one, the calculator applies the full first-year rate and then compounds the later annual rate for age minus one:

current value=price×(1−first-year rate)×(1−annual rate)age−1\text{current value} = \text{price} \times (1 - \text{first-year rate}) \times (1 - \text{annual rate})^{\text{age} - 1}

Total depreciation and percent lost are:

total depreciation=price−current value\text{total depreciation} = \text{price} - \text{current value}

value lost=total depreciationprice×100%\text{value lost} = \frac{\text{total depreciation}}{\text{price}} \times 100\%

Next-year value depends on whether the vehicle is still inside year one. If age is less than one, next-year value is price times one minus the first-year rate. Otherwise, it is current value times one minus the later annual rate.

Example: estimating car depreciation

Use the default inputs: original purchase price 35,000, car age 3 years, first-year depreciation 20%, and later annual depreciation 15%. Because age is greater than one, the calculator first applies the full first-year rate. After year one, value is 35,000 · 0.80, or 28,000. Then it compounds the later rate for age minus one, which is 2 years. The later factor is 0.85 squared, or 0.7225. Current value is 28,000 · 0.7225, or 20,230.00.

Total depreciation is 35,000 minus 20,230, or 14,770.00. Value lost is 14,770 divided by 35,000, multiplied by 100, or 42.20%. Because the car is older than one year, next-year value is current value times 0.85, or 17,195.50.

For a partial-year example, use 35,000, 0.5 years, 20% first-year depreciation, and 15% later depreciation. The current value is 35,000 · (1 minus 0.20 · 0.5), or 35,000 · 0.90, which equals 31,500.00. Next-year value is the full first-year value, 35,000 · 0.80, or 28,000.00, because the car is still less than one year old.

When car depreciation estimates are useful

Depreciation is often the largest ownership cost for a newer vehicle. A rate-based estimate helps compare buying new versus used, deciding when to sell, evaluating lease-end choices, planning insurance coverage, or estimating the total cost of ownership. It is also useful when a car loan balance needs to be compared with expected resale value.

The model is intentionally simple. It does not know mileage, trim, accident history, maintenance records, tax credits, fuel prices, or local demand. A low-mileage truck in a strong market can beat the estimate. A damaged luxury car with expensive repairs can fall below it. Treat the result as a scenario, then check market listings and dealer quotes before making a transaction.

Tips for choosing rates

  • Use a higher first-year rate for new vehicles, luxury vehicles with steep early drops, or models with heavy incentives.
  • Use a lower later rate for reliable vehicles with strong used demand.
  • Increase later depreciation for high mileage, weak condition, unpopular trims, or costly upcoming repairs.
  • Model optimistic, base, and conservative resale cases before deciding to sell.
  • Compare value loss with financing costs, insurance, fuel, maintenance, and taxes.

Sources

  • BLS CPI series for used cars and trucks — BLS public data series, accessed 2026-07-09; Shows that used-vehicle prices change over time; it does not prescribe the user-entered depreciation rates, which remain scenario assumptions.
  • Calculation scope: The equations and assumptions described above are applied only to values entered in the form. No live rates, prices, tax rules, lender terms, or accounting classifications are fetched. Results are user scenarios, not quotes or prescribed classifications.

Frequently asked questions

How does this car depreciation calculator work?
It applies a first-year depreciation rate through age one, then compounds a later annual depreciation rate for years after that. The output includes estimated current value, total depreciation, percent of original price lost, and estimated value in one more year.
Why is the first-year rate separate?
Many vehicles lose value fastest when they move from new to used status. The calculator models that by applying the first-year rate to the first year, then using a separate annual rate for later years when depreciation usually becomes more gradual.
Can I enter a partial car age?
Yes. The form allows decimals such as 0.5 or 3.5 years. If age is one year or less, the first-year loss is prorated. If age is greater than one, the calculator compounds the later rate for age minus one years.
Is the result a guaranteed resale value?
No. It is a planning estimate based on rates you enter. Actual resale value also depends on mileage, condition, accident history, options, location, fuel prices, warranty coverage, supply, demand, and whether the sale is private-party, trade-in, or retail.
How is next-year value calculated?
If the car is less than one year old, next-year value is the value after the full first-year depreciation rate. Otherwise, the calculator multiplies the current value by one minus the later annual depreciation rate for another year.
Is car depreciation tax depreciation?
Not necessarily. This calculator estimates economic value loss. Business vehicle tax depreciation can involve IRS rules, listed property limits, business-use percentages, Section 179, bonus depreciation, and recovery periods. Personal vehicle value loss is usually not deductible for owners today.

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