Vehicle Depreciation Calculator
Estimate how much your car is worth after several years of ownership using a fixed annual depreciation rate. Useful when selling, trading in, or insuring a vehicle.
About this calculator
Cars lose value over time through a process called depreciation. This calculator uses the declining-balance method, where the car retains a fixed percentage of its value each year. The formula is: Current Value = purchase_price × (1 − depreciation_rate / 100)^years. For example, a car that depreciates 15% per year is worth 85% of its prior-year value at the end of each year. This compound effect means depreciation accelerates in early years and slows later. The average new car loses roughly 15–20% of its value per year, making this formula a reliable industry-standard approximation for residual value estimation.
How to use
Suppose you bought a car for $30,000, it depreciates at 15% per year, and you want to know its value after 5 years. Plug in: Current Value = $30,000 × (1 − 0.15)^5 = $30,000 × (0.85)^5 = $30,000 × 0.4437 ≈ $13,311. Enter $30,000 as the Purchase Price, 5 as Years Owned, and 15 as the Annual Depreciation Rate. The calculator instantly shows the estimated resale value of approximately $13,311.
Frequently asked questions
What is a typical annual depreciation rate for a new car?
New cars typically depreciate between 15% and 20% per year using the declining-balance method. In the first year alone, a new car can lose up to 20–30% of its value the moment it leaves the dealership. Luxury vehicles and sports cars often depreciate faster, while trucks and SUVs tend to hold their value better. Using 15% is a common conservative estimate for general calculations.
How does the declining-balance depreciation formula work for vehicles?
The declining-balance method applies the same depreciation rate to the car's remaining value each year, not its original price. This means the dollar amount lost decreases each year even though the percentage stays constant. The formula Current Value = P × (1 − r)^t captures this compounding effect mathematically. It mirrors real-world car valuation more accurately than straight-line depreciation, which assumes equal loss each year.
When should I use a car depreciation calculator?
A car depreciation calculator is most useful when you are preparing to sell or trade in your vehicle and want a ballpark resale value. It also helps when reviewing gap insurance needs, since rapid depreciation can leave you owing more than the car is worth. Additionally, business owners who use vehicles for work can use it to estimate book value for tax and accounting purposes. Buyers can also use it to evaluate whether a used car is priced fairly relative to its age.