Car value is calculated using: Original Price × Age Depreciation × Mileage Depreciation × Condition Factor. Cars typically depreciate 15% per year, with additional depreciation for high mileage and poor condition.
- Step 1: Age factor = 0.85^years (15% annual depreciation)
- Step 2: Mileage factor = 1 – (excess miles over 12K/yr ÷ 100,000) × 0.1
- Step 3: Condition multiplier: Excellent 1.0, Good 0.85, Fair 0.70, Poor 0.50
- Example: $30K, 5 yr, 60K miles, Good = $30K × 0.4437 × 1.0 × 0.85 = $11,314