Calculator Inputs
Example Data Table
| Scenario | Purchase Price | Age | Annual Mileage | Method | Projected Value After 3 Years |
|---|---|---|---|---|---|
| Family Sedan | $32,000 | 2y 6m | 14,000 | Hybrid Accelerated | $14,200 |
| Luxury SUV | $58,000 | 1y 0m | 10,500 | Declining Balance | $28,900 |
| Used Economy Hatchback | $18,500 | 4y 3m | 12,000 | Straight Line | $9,600 |
| Electric Crossover | $46,000 | 1y 8m | 16,000 | Hybrid Accelerated | $20,750 |
Formula Used
Base Annual Rate = default rate by vehicle type, or your custom rate.
Adjusted Annual Rate = Base Rate × Mileage Factor × Condition Factor × Market Factor × Age Factor.
Future Depreciation Cost = Estimated Current Value − Projected Future Value.
Monthly Future Depreciation = Future Depreciation Cost ÷ Holding Months.
Cost Per Distance Unit = Future Depreciation Cost ÷ Projected Distance During Holding Period.
The declining balance model reduces value by a percentage each period. The straight line model spreads value loss more evenly. The hybrid model accelerates early depreciation, then slows later losses. Salvage value acts as the floor, so the vehicle does not drop below your minimum resale assumption.
How to Use This Calculator
- Enter the vehicle purchase price and your minimum salvage value.
- Choose vehicle type, condition, market trend, and depreciation method.
- Add the car’s current age and your expected future holding period.
- Enter annual mileage and a benchmark mileage for comparison.
- Set an economic life and optional custom annual rate if needed.
- Submit the form to view current value, projected resale value, yearly losses, chart output, and export options.
Frequently Asked Questions
1. What does this calculator estimate?
It estimates your car’s current value, future resale value, total depreciation, monthly depreciation, and depreciation cost per mile or kilometer using several adjustable assumptions.
2. Why are there different depreciation methods?
Cars rarely lose value at one constant pace. Different methods help you model steady loss, percentage-based decline, or heavier early-year depreciation depending on your planning style.
3. How does mileage affect depreciation?
Higher annual mileage usually increases wear, lowers resale appeal, and raises depreciation. This calculator compares your mileage against a benchmark and adjusts the rate accordingly.
4. What is salvage value?
Salvage value is the minimum floor you expect the car to retain. It prevents the estimate from falling unrealistically low during long ownership periods.
5. Should I use a custom annual rate?
Use a custom rate when you know your market better than general averages. It is helpful for rare trims, unusual demand swings, or vehicles with special resale behavior.
6. Does this replace a professional appraisal?
No. It is a budgeting and planning tool. Actual resale prices can differ because of accidents, service history, trim level, regional demand, and negotiation timing.
7. Why does depreciation slow on older cars?
Many vehicles lose value fastest in early ownership years. Later, the dollar decline often becomes smaller because a large share of initial value loss already happened.
8. Can I use this for leased or classic cars?
Yes, but assumptions matter more. Leased vehicles may need contract-based residual values, while classic vehicles can behave differently and may even appreciate in some markets.