The difference between your original purchase price and current estimated value.
AUTO CALCULATOR
Car Depreciation Calculator
Estimate how much value your vehicle has lost and project its future value using an annual depreciation assumption. Compare value retained, projected losses, and year-by-year vehicle value in one place.
Vehicle depreciation inputs
Estimate value loss today and project your vehicle's future value.
Vehicle value
Ownership & projection
Results update when you select Calculate Depreciation. The projection uses compound annual depreciation from the current value.
Your depreciation estimate will appear here
Enter the vehicle values and projection assumptions, then select Calculate Depreciation.
VALUECurrent vehicle value
LOSSEstimated depreciation
FORECASTFuture resale estimate
What Is Car Depreciation?
Car depreciation is the reduction in a vehicle's value over time. A vehicle can lose value even when you make no separate payment for that loss. Age, mileage, condition, accident history, maintenance, equipment, model demand, and the used-car market can all influence resale value.
This Car Depreciation Calculator separates two ideas: the depreciation that has already occurred based on your original purchase price and current estimated value, and a future projection based on the annual rate you enter. For a broader ownership picture, you can also compare the result with our car payment calculator and trip fuel costs.
How to Calculate Car Depreciation
The simplest historical depreciation calculation compares what you originally paid with what the vehicle is worth now.
Depreciation = Original purchase price − Current estimated value
To express that loss as a percentage of the original purchase price, divide the value lost by the original price and multiply by 100.
Depreciation % = (Depreciation ÷ Original purchase price) × 100
For example, if a car originally cost $35,000 and is currently worth $28,000, the estimated depreciation is $7,000. That represents 20% of the original purchase price.
| Measure | Formula | What it tells you |
|---|---|---|
| Total depreciation | Original price − current value | Dollar value lost so far |
| Depreciation percentage | Loss ÷ original price × 100 | Share of original value lost |
| Average annual depreciation | Total depreciation ÷ years owned | Average historical dollar loss per year |
| Future value | Current value × (1 − rate)n | Mathematical future-value projection |
How the Future Value Projection Works
The future projection uses compound annual depreciation. Instead of subtracting the same dollar amount every year, the selected depreciation rate is applied to the vehicle's value at the beginning of each projected year.
Future value = Current value × (1 − annual depreciation rate)n
Here, n is the number of projected years and the annual rate is written as a decimal. A 15% annual depreciation rate, for example, becomes 0.15 in the formula. This approach produces a declining value curve rather than a straight-line dollar reduction.
Example of compound depreciation
If a vehicle is currently worth $28,000 and you assume 15% annual depreciation, one year later the mathematical projection is $23,800. The next year applies 15% to $23,800 rather than to the original $28,000. That is why the annual dollar loss becomes smaller as the projected value declines.
What the Calculator Shows
The percentage of the original purchase price represented by the value already lost.
Historical depreciation divided by the number of years owned.
A compound projection based on the current value, annual rate, and future period you enter.
What Causes a Car to Depreciate?
Depreciation is not controlled by age alone. A popular vehicle in excellent condition can behave differently from an older vehicle with high mileage or a poor accident history.
- Vehicle age and time since purchase
- Odometer mileage and annual driving
- Make, model, trim, and equipment
- Exterior and interior condition
- Accident or damage history
- Maintenance and service history
- Reliability and buyer demand
- Local supply, demand, and used-car market conditions
New Cars vs. Used Cars
New vehicles can experience substantial value loss during the early years of ownership, but depreciation is not identical for every vehicle. Used vehicles can also depreciate at very different rates depending on age, mileage, condition, popularity, and market demand.
For that reason, the annual depreciation rate in this calculator is intentionally an input. It is an assumption for scenario planning, not a claim that every car loses the same percentage each year.
Why Mileage Matters
Mileage is an important part of used-car valuation because it gives buyers information about how heavily a vehicle has been used and how much wear may remain. Higher mileage can reduce resale value, but mileage should not be treated as a standalone depreciation formula.
Condition, maintenance records, accident history, model reputation, equipment, and market demand can all change the price a buyer is willing to pay. That is why an actual market listing or appraisal can differ from a calculator projection.
How to Use the Car Depreciation Calculator
- Enter the vehicle's original purchase price.
- Enter its current estimated market value.
- Enter how many years you have owned the vehicle.
- Choose the number of future years to project.
- Enter an annual depreciation assumption.
- Select Calculate Depreciation and review the charts and tables.
If you do not know the current value, use a realistic market estimate rather than the remaining balance on your auto loan. A loan balance tells you what you owe; vehicle value tells you what the car may be worth.
Car Value vs. Car Loan Balance
Depreciation and financing are related to vehicle ownership, but they are not the same thing. Your car can lose value while your loan balance falls through monthly payments. If the vehicle is worth less than the amount you owe, you may have negative equity.
Use our monthly car payments to estimate monthly financing payments and our car affordability to explore a purchase price based on a payment budget.
Depreciation and Total Cost of Ownership
Depreciation is an important ownership cost because it measures value that leaves the vehicle even if no bill arrives for it. A complete ownership estimate can also include financing, fuel, insurance, maintenance, repairs, taxes, registration, and fees.
For fuel expenses, see the fuel cost calculator and gas mileage. You can use the fuel economy conversions to convert MPG, L/100 km, and other efficiency measurements.
Worked Example
Consider a vehicle purchased for $35,000 that is now estimated to be worth $28,000 after two years. The current depreciation is $7,000, which equals 20% of the original purchase price. If you then assume a 15% annual depreciation rate for the next five years, the future-value projection applies that rate to the current value each year.
| Input | Example | Meaning |
|---|---|---|
| Original price | $35,000 | Starting purchase price |
| Current value | $28,000 | Estimated value today |
| Years owned | 2 | Used for average historical depreciation |
| Future projection | 5 years | Length of the mathematical forecast |
| Annual rate | 15% | Future depreciation assumption |
Ways to Reduce Depreciation Loss
You cannot completely prevent vehicle depreciation, but ownership choices can affect resale value. Keeping the vehicle maintained, preserving service records, avoiding unnecessary damage, and keeping mileage reasonable can help protect market value. Choosing a vehicle with strong buyer demand can also matter.
When comparing a new vehicle with a used one, consider depreciation alongside financing and operating costs rather than looking only at the monthly payment. A lower payment does not automatically mean a lower total cost of ownership.
Common Car Depreciation Mistakes
- Using the loan balance as vehicle value: debt and market value are different numbers.
- Assuming one rate fits every vehicle: depreciation varies significantly by vehicle and market.
- Ignoring mileage: mileage can influence resale value and buyer demand.
- Treating a projection as an appraisal: a formula cannot know the future used-car market.
- Looking only at monthly payments: financing can hide the larger ownership picture.
Frequently Asked Questions
How much does a car depreciate each year?
There is no single annual rate for every vehicle. Depreciation varies with age, mileage, condition, model, demand, and market conditions. This calculator lets you test the annual rate you believe is appropriate for your scenario.
How do I calculate how much value my car has lost?
Subtract the current estimated vehicle value from the original purchase price. The difference is the estimated dollar amount of depreciation.
What is a good depreciation rate for a car?
There is no universal rate. Use a rate that reflects the vehicle and scenario you want to test, and treat the result as an estimate rather than a guaranteed resale forecast.
Do all cars depreciate at the same rate?
No. Reliability, demand, mileage, condition, age, accident history, equipment, and broader market conditions can all produce different depreciation patterns.
Does mileage affect car depreciation?
Yes. Mileage can affect resale value because higher mileage can indicate greater use and potential wear. It is one factor among several that influence market value.
Is the future value estimate exact?
No. It is a mathematical projection based on the annual rate you enter. Actual resale value can be higher or lower because the market and vehicle condition change.
What does average annual depreciation mean?
It is the total historical value lost divided by the number of years owned. If the ownership period is zero, the calculator reports zero for this measure.
Does the calculator predict my car's resale price?
No. The future value is a scenario estimate, not a professional appraisal or guaranteed resale price.
Important: Car depreciation estimates are informational only. Actual vehicle values depend on the specific vehicle, mileage, condition, history, local market, supply and demand, and many other factors. The future projection uses the annual depreciation rate you enter and should not be treated as a guaranteed resale value or professional appraisal.