Even after a flawless repair, a car with an accident on its history is usually worth less than the same car without one. Answer a few questions to see how much value yours may have lost. It’s free, takes about two minutes, and needs no sign-up.
Tell us about the vehicle
Start with the VIN and we’ll fill in the rest, or skip it and type the details yourself.
Your VIN is on your registration, insurance card, and the driver-side dashboard.
What was it worth before the accident?
If you know the vehicle’s market value (from a recent appraisal, a KBB or Edmunds check, or a dealer offer), enter it. That makes the estimate more reliable. If not, give us the original sticker price (MSRP) and we’ll estimate from age and mileage.
What happened, and how was it repaired?
Repair cost and the type of damage matter more than a gut feeling about how bad it was.
Damage (check all that apply)
Repair details
Vehicle history
Last step. History reports like Carfax and AutoCheck show prior accidents and title brands to future buyers.
Title status
What is diminished value?
Diminished value is the difference between what your vehicle was worth the day before an accident and what it is worth after it has been fully repaired. The repair fixes the damage. It can’t remove the accident from the vehicle’s history, and buyers know it. A car with a reported collision usually sells for less, or takes longer to sell, than an otherwise identical one with a clean record.
That lost value is real even when the repair is perfect and the title stays clean. It is most noticeable on newer, lower-mileage vehicles, where the accident is the biggest thing a buyer has to weigh.
How this calculator estimates it
Many online diminished value calculators apply a single formula, most often the so-called “17c” formula: a flat 10% cap, then fixed multipliers for damage and mileage. It is simple, but it treats a $30,000 pickup and a $65,000 sports car identically and isn’t based on what buyers actually pay. This calculator works differently. It looks at:
- Damage severity. A 0–100 score built from structural or frame damage, airbag deployment, repair cost relative to the car’s value, panels replaced or repaired, mechanical, suspension and electrical damage, parts quality, and paint work.
- The type of vehicle. Performance, luxury and collectible vehicles tend to lose more value from an accident history than economy cars and work trucks, because their buyers have more choices and care more about provenance.
- Age and mileage. On an older, high-mileage vehicle, buyers already discount heavily for condition, so an accident adds less.
- Vehicle history. Prior accidents add to the loss, and a rebuilt or salvage title is treated as its own, much larger hit.
- A market-comparison layer. The estimate is blended with a modeled gap between comparable clean and accident-history vehicles. This part is modeled from vehicle class and is not live sales data.
- A range, not a false-precision number. Every result comes with a likely range and a confidence rating that reflects how much we really know.
Be realistic about what this is. It is a free estimate for planning and conversation. It is not an appraisal, an insurance company valuation, or a legal determination. If you plan to make a claim, ask a licensed appraiser to compare actual sales of similar vehicles.
Can you get paid for diminished value?
It depends on your state and on whose insurance is paying. A claim against the at-fault driver’s insurer (a “third-party” claim) is the most common route, and many states allow it. A claim under your own policy (a “first-party” claim) is allowed in fewer states, and many policies exclude it. Deadlines apply, so don’t wait.
This is general information, not legal advice. Your insurer, a licensed appraiser, or an attorney can tell you what applies to your situation.
Diminished value questions
What is diminished value?
Diminished value is the drop in a vehicle's market value caused by an accident, even after a complete and professional repair. Buyers and dealers pay less for a car with an accident on its history.
Is diminished value the same as a total loss?
No. A total loss means the insurer decides repairs cost too much compared with the car's value and pays you for the car instead. Diminished value applies when the car is repaired and put back on the road. The cutoff for a total loss varies by state and insurer; this calculator flags it when repairs reach 75% of the car's value.
Does a clean title mean there is no diminished value?
No. A clean title only means the vehicle was never branded salvage or rebuilt. Vehicle history reports such as Carfax and AutoCheck can still show an accident, and many buyers and dealers factor that into what they offer.
Do older or high-mileage cars have diminished value?
Usually much less. When a vehicle is already heavily discounted for age and mileage, an accident history adds a smaller extra discount. This calculator reduces its estimate for age and mileage for that reason.
What affects diminished value the most?
Structural or frame damage, airbag deployment, the repair cost compared with the car's value, the type of vehicle (performance, luxury and collectible cars tend to lose more), age and mileage, prior accidents, and any salvage or rebuilt title.
How accurate is this diminished value calculator?
It is an estimate, which is why every result shows a range and a confidence rating. The market-comparison part is modeled from the type of vehicle, not live sales listings, so confidence is capped at moderate. For a claim, a licensed appraiser's report comparing real sales carries far more weight.
Who pays for diminished value?
It depends on your state and the claim. Claims against the at-fault driver's insurer are the most common route. Claims under your own policy are allowed in fewer states, and many policies exclude them. Check your policy and talk with your insurer or an attorney.
Does the calculator cost anything or share my information?
No. It is free and runs in your browser. Nothing you enter is sent to or stored by 1Reason. The optional VIN lookup contacts the free NHTSA vehicle database.
Questions about your own coverage?
1Reason is an independent insurance agency in Eau Claire, Wisconsin. We’re glad to walk through what your policy says and shop your coverage if it falls short.
This tool produces an automated estimate for informational purposes only. It is not a guaranteed appraisal, an official insurance company valuation, or a legal determination of diminished value. Diminished value rules and eligibility vary by state and by insurer, and no insurance coverage is bound or implied by using this calculator. VIN lookups use the free NHTSA vehicle database. Nothing you enter is sent to or stored by 1Reason.