Vehicle Depreciation Calculator
Estimate your vehicle's current market value by factoring in age, mileage, vehicle type, and condition. Helpful when buying, selling, or insuring a used car.
About this calculator
This calculator estimates a vehicle's residual value using four compounding factors: vehicle type (base annual retention rate), age, mileage, and condition. The formula is: Value = purchasePrice × vehicleType^vehicleAge × 0.9999^(mileage × 0.01) × condition. The vehicleType factor represents the annual value-retention rate for a given class (e.g., 0.82 for sedans, 0.85 for trucks). The mileage factor applies a small exponential penalty per mile, and the condition multiplier (e.g., 1.0 for good, 0.85 for fair) scales the result up or down. Together these factors produce a more nuanced depreciation estimate than a simple fixed-rate formula.
How to use
Suppose a sedan was purchased for $28,000, is 4 years old, has 55,000 miles, uses a vehicle type factor of 0.82, and is in good condition (multiplier 1.0). Step 1: Age factor = 0.82^4 = 0.4521. Step 2: Mileage factor = 0.9999^(55,000 × 0.01) = 0.9999^550 ≈ 0.9460. Step 3: Value = $28,000 × 0.4521 × 0.9460 × 1.0 ≈ $28,000 × 0.4277 ≈ $11,976. Enter your values and the calculator produces the estimated current market value.
Frequently asked questions
How does mileage affect vehicle depreciation beyond just age?
Mileage acts as an independent depreciation driver because it directly reflects mechanical wear, regardless of how old the car is. A 3-year-old car with 90,000 miles will typically be worth significantly less than a 3-year-old car with 30,000 miles. This calculator applies a separate exponential mileage penalty so both factors work simultaneously. In practice, buyers and appraisers often value mileage as heavily as age when pricing used vehicles.
Which vehicle types depreciate the slowest over time?
Trucks, SUVs, and certain luxury brands historically retain value better than economy sedans or minivans. For example, pickup trucks from brands like Toyota and Ford have strong resale markets and can retain over 50% of their value after five years. Conversely, compact sedans and domestic luxury cars often depreciate faster due to higher supply and lower demand in the used market. Hybrid and electric vehicles show mixed depreciation patterns depending on battery technology and fuel savings appeal.
Why does vehicle condition matter so much in depreciation calculations?
Condition reflects the real-world quality of the vehicle beyond what age and mileage alone can capture. A well-maintained car with fresh tires, no rust, and a clean service history commands a premium over a mechanically similar car in poor condition. In appraisals and trade-in valuations, condition categories such as excellent, good, fair, and poor can shift a vehicle's value by 10–25%. This calculator applies a condition multiplier to quantify that difference directly in the estimated resale price.