Last Updated on October 25, 2026 by Syed Sarim Naqvi
A diminished value claim recovers the gap between what your car was worth before an accident and what it is worth after repair, and the Insurance Information Institute says every state except Michigan allows some version when another driver is at fault. The catch is who pays: most states let you claim only from the at-fault driver’s insurer, and the 17c formula most insurers use applies a 10% cap that appraisers say consistently undervalues the loss.
Key Takeaways
- The Insurance Information Institute, cited by Bankrate and CarInsurance.com, says all states except Michigan allow some diminished value recovery when the other driver is at fault
- A NAIC research paper says Georgia is the only state with a clear legal direction that first-party auto insurers must pay diminished value to their own policyholders
- The 17c formula is pre-accident value x 0.10 x a damage multiplier x a mileage multiplier, and Bankrate’s example caps a sample payout at $1,500
- Time limits vary: Georgia 4 years, Michigan 3, Ohio 2, California 3 for property damage, and one guide says most states set 2 to 3 years
- If you were at fault, your own insurer most likely will not pay a diminished value claim
What Is a Diminished Value Claim?
Enjuris explains that an accident can lower a car’s market value even after repairs, and that a plaintiff can usually claim from the defendant’s insurance. Bankrate defines diminished value as the difference in market value before and after an accident. MoneyGeek says you file it against the at-fault driver’s liability insurance as a third-party claim, and that most states do not allow first-party claims against your own policy.
First-Party vs Third-Party Claims
The NAIC’s research paper explains a first-party claim is filed by the insured against their own auto insurer, while a third-party claim is made against the at-fault driver’s insurer, and that insurers should be prepared to pay third-party diminished value in many states. A 50-state summary notes Texas allows third-party claims but a Texas Department of Insurance bulletin says first-party physical damage does not include diminished value unless the policy says so, and Florida follows a similar split. Washington is described as allowing first-party diminished value unless excluded.
| Claim Type | Against Whom | Typical Availability |
|---|---|---|
| Third-party | At-fault driver’s liability insurer | Allowed in every state except Michigan, per III |
| First-party | Your own insurer | Clear right only in Georgia; narrow in a few states |
| Uninsured motorist | Your UM coverage | Some states allow it, per CarInsurance.com |
| You were at fault | Not available against your own policy in most cases | Most likely denied |
How Does the 17c Formula Work?
A claims guide gives the formula as pre-accident value x 0.10 x damage multiplier x mileage multiplier. Bankrate says it originated in a Georgia case involving a State Farm diminished value claim, where it appeared in paragraph 17, section c, and that the base loss is 10% of the vehicle’s value, with an example in which an insurer would pay at most $1,500 on a sample vehicle. A Georgia law firm notes the formula is not mandated by Georgia courts and argues it systematically undervalues claims, and another guide says the market does not cap accident-history depreciation at 10%. As an illustration, not a quote, a $30,000 car starts at a $3,000 base loss before the multipliers reduce it.
How Do You File a Claim?
- Repair first: one guide says to repair the car, then document the loss
- Get a value: pre-accident market value from NADA, KBB or dealer quotes, plus an independent appraisal
- Use the at-fault insurer: third-party claims need an at-fault, insured driver
- Expect a low first offer: a guide says to expect an offer near the 17c number
- Do not wait: terms.law says delay lets insurers argue time and mileage caused the loss
What Time Limits Apply?
A Georgia firm says the property damage statute of limitations there is four years from the accident. A table cited by Jerry lists Georgia 4, Michigan 3 and Ohio 2 years, terms.law gives California as 3 years, and MoneyGeek says most states use 2 to 3 years. CarInsurance.com notes North Carolina’s is 3 years and Missouri’s 5. These figures come from different sources and dates, so check your state’s current limit.
What Should You Check?
- Fault: you generally need the other driver to be at fault
- Policy wording: first-party recovery depends on state law and your policy
- Documentation: repair invoices, photos and a vehicle history report
- Deadline: count from the date of the accident
- Appraisal: an independent appraisal can challenge the 17c result
How Does This Connect to Other Auto Cover?
Loan shortfalls are in Gap Insurance Explained, rental after a crash in Rental Car Insurance Explained, and drivers without a car in Non-Owner Car Insurance and SR-22 Explained. Agreed-value policies avoid depreciation arguments in Classic Car Insurance Explained, and liability limits in Umbrella Insurance Explained.
FAQ
What is diminished value?
The drop in a car’s market value caused by an accident, even after repair.
Can I claim it from my own insurer?
Generally not, except in Georgia and a few states in narrow cases.
Can I claim if I caused the accident?
Most likely not; your insurer will probably deny it.
What is the 17c formula?
Value x 0.10 x damage multiplier x mileage multiplier, used by many insurers.
Is the 17c result fair?
Appraisers and lawyers say it often undervalues the loss.
How long do I have to file?
Often 2 to 4 years from the accident, depending on the state.
Which state does not allow it?
Michigan, per the Insurance Information Institute.
Glossary
- Diminished value: lost market value after an accident repair.
- First-party claim: a claim against your own insurer.
- Third-party claim: a claim against the at-fault driver’s insurer.
- 17c formula: a Georgia-derived calculation insurers use.
- Statute of limitations: the deadline to file a claim.
Sources
- NAIC CIPR Journal of Insurance Regulation: Diminished Value Research (2023) (Georgia only clear first-party state)
- Bankrate: How to File a Diminished Value Claim (III statement, 17c origin, $1,500 example)
- CarInsurance.com: Diminished Value Claim (III statement, UM, limitations)
- MoneyGeek: How to File a Diminished Value Claim (third-party filing, 2 to 3 years)
- Enjuris: Diminished Value in a Lawsuit (first and third-party, 17c steps)
- Beancount: Diminished Value Claim and 17c Formula Guide (formula, offer expectations)
- Georgia law firm guide: How to File a Diminished Value Claim in Georgia (four-year limit, 17c not mandated)
- Terms.law: What Is Diminished Value? (California limit, insurer tactics)
- Francis Injury Law: Diminished Value Claims by State 2025 (Texas, Florida, Washington rules)
Related reading: Extended Car Warranty Explained · Motorcycle Insurance Explained · Track Day Insurance Explained
Published October 2026. Laws, formulas and time limits vary by state and change often; always confirm your state’s rules and deadline, and refresh this article periodically. This is general information, not legal advice.
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