Diminished Value Claims by State: Fault Rules, Deadlines and Where to Complain
The mechanics of a diminished value claim are the same everywhere: you document what your car was worth before the crash, prove the accident history has cut its market value, and demand the difference from the at-fault driver's insurer. What changes at the state line is narrower than most guides suggest — but the three things that do change can decide whether you recover anything at all.
The three things that actually change by state
Everything else — the 17c formula, the appraisal evidence, the demand letter — travels unchanged across state lines. These do not:
- The shared-fault rule. Most states reduce your payout in proportion to your share of blame. A small number bar recovery outright once you cross a threshold, and two on this page bar it at almost any level of fault.
- The filing deadline for property damage. It ranges from one year to six among the states below, and it runs from the accident date — not from the day the insurer denies you.
- Who regulates the insurer. When an adjuster stonewalls, the complaint goes to that state's insurance regulator, and the name differs in every one.
State-by-state comparison
Deadlines and fault rules change with legislation and court decisions. Treat this table as a starting point and confirm the current position with the regulator listed or a licensed attorney in your state before you act.
How to read the table. Fault means the at-fault driver's insurer is liable; no-fault applies to injury claims only, leaving vehicle damage on a separate fault-based track. Modified 50% bars recovery once you are more than half to blame; pure comparative only reduces it; contributory can bar it at almost any share of fault. A dash means this site does not state a figure — confirm it with the regulator.
| State | System | Shared-fault rule | Property-damage deadline | Insurance regulator |
|---|---|---|---|---|
| Arizona | Fault | Pure comparative | — | Arizona Department of Insurance and Financial Institutions (azcourts.gov) |
| Colorado | Fault | Modified 50% | 3 years | Colorado Division of Insurance (coloradojudicial.gov) |
| Illinois | Fault | Modified 50% | 5 years | Illinois Department of Insurance (illinoiscourts.gov) |
| Indiana | Fault | Modified 50% | — | Indiana Department of Insurance (in.gov) |
| Louisiana | Fault | Pure comparative | 1 year (prescriptive period) | Louisiana Department of Insurance (louisianacourts.gov) |
| Maryland | Fault | Contributory negligence — even minor shared fault can eliminate the entire claim | 3 years | Maryland Insurance Administration (mdcourts.gov) |
| Massachusetts | No-fault (injury only) | Modified 50% | 3 years | Massachusetts Division of Insurance (mass.gov) |
| Missouri | Fault | Pure comparative | — | Missouri Department of Commerce and Insurance (courts.mo.gov) |
| New Jersey | No-fault (injury only) | — | — | New Jersey Department of Banking and Insurance |
| New York | No-fault (injury only) | Pure comparative | — | New York State Department of Financial Services (nycourts.gov) |
| Ohio | Fault | Modified 50% | — | Ohio Department of Insurance (ohiocourts.gov) |
| Oklahoma | Fault | Modified 50% | 2 years | Oklahoma Insurance Department (oscn.net) |
| Oregon | Fault | Modified 50% | 6 years | Oregon Division of Financial Regulation (courts.oregon.gov) |
| Utah | Fault (tort) | Modified 50% | 3 years | Utah Insurance Department (utcourts.gov) |
| Virginia | Fault | Pure contributory negligence — being found even 1% at fault may bar recovery entirely | 5 years | Virginia Bureau of Insurance (vacourts.gov) |
| Washington | Fault (tort) | Pure comparative | 3 years | Washington State Office of the Insurance Commissioner (courts.wa.gov) |
Two states where partial fault can end the claim
Most drivers assume a small share of blame simply trims the payout. In Virginia that assumption is wrong: the state applies pure contributory negligence, and a finding that you were even one percent at fault may bar recovery altogether. Maryland follows the same doctrine, where even minor shared fault can eliminate the claim. In both states the police report's fault determination carries far more weight than it does elsewhere — settle any dispute over that finding before you file, not after.
No-fault states still allow property-damage claims
Massachusetts, New Jersey and New York are commonly described as no-fault states, and drivers there often conclude a diminished value claim is impossible. The no-fault label governs injury compensation. Vehicle damage runs on a separate, fault-based track in each of these states, which leaves the third-party claim against the at-fault driver's carrier available. The label is the reason many valid claims are never filed.
States with a dedicated guide
Six states have enough distinctive case law or procedure to warrant their own walkthrough:
What to do next
Find your state above, note the deadline and the fault rule, then work the claim itself: run the 17c calculator for a baseline figure, follow the filing process, and send a written demand. If the first offer is low — and it usually is — countering with an independent appraisal is what moves the number.
This is general information, not legal advice, and no outcome is guaranteed. Rules and deadlines vary by state and change over time — verify with the regulator listed above or a licensed attorney before acting.