Diminished Value 17c Worksheet and Formula

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Download the Official Diminished Value 17c Worksheet PDF

Get your copy of the comprehensive Diminished Value 17c Worksheet and Formula to help calculate your vehicle’s true diminished value after an accident.

 ComponentCalculationWhy it’s wrong
1Base Loss in Value10% of NADA retail
  • 10% is arbitrary
  • 10% could not logically apply to all cars
  • 10% is too low
  • NADA Retail is for dealers not consumers
2Mileage Modifier
  • 1 for 0 miles
  • 0 for 100,000 miles
  • Reversely proportional in between
  • Mileage is already a component of NADA retail
  • Mileage used twice
  • No evidence that cars with more than 100K lose no value
  • Arbitrary and illogical
3Damage Modifier
  • 1 for severe structural damage
  • 0 for no structural damage
  • Proportional in between
  • Does not consider flood damage
  • Does not consider body damage sans structural
  • Does not consider airbag deployment
  • Very subjective

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