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State Farm Diminished Value Claim

Here's the irony: the formula insurers use to value your diminished value claim exists because of a lawsuit against State Farm. Here's how to file with State Farm, what the Mabry case means for you, and how to keep from getting lowballed.

After an accident, even a flawless repair leaves your car worth less on the resale market — that permanent gap is diminished value. If a State Farm driver caused your wreck, State Farm is the insurer you'll be claiming that loss from. This guide covers exactly how, and where State Farm's own history gives you leverage.

The Mabry case: why the 17c formula exists at all

In 2001, a Georgia class action — Mabry v. State Farm — held that State Farm had to actually assess and pay diminished value to its own Georgia policyholders, rather than ignore it. The valuation method that came out of that case is the 17c formula, still the industry's baseline today. So when an adjuster quotes you a 17c number, they're using a method that a court imposed on State Farm. Two things follow from that:

In Georgia, first-party diminished value is required. If you're a Georgia State Farm policyholder, State Farm must evaluate diminished value even on your own claim.
The 17c number is a floor, not a ceiling. It was designed to be conservative. An independent appraisal is not bound by its 10% cap and often lands higher.

Outside Georgia: first-party rules vary widely and many policies exclude diminished value. But a third-party claim — where a State Farm insured hit you — is recognized in most states, because their liability coverage owes you for the full property loss.

Third-party vs. first-party with State Farm

Third-party (their insured hit you): You file against the at-fault State Farm policyholder's liability coverage. Diminished value is generally owed as part of making you whole. This is the stronger position in most states.

First-party (your own State Farm policy): Whether State Farm owes you depends on your state and policy language. Georgia requires it; many states let it be excluded. Check your policy's property-damage section and your state Department of Insurance first.

How to file, step by step

Open the claim and state plainly that you're claiming diminished value, not just repairs — get the claim number in writing.
Establish your pre-accident value with KBB or NADA and local listings for your exact year, make, model, and trim.
Document severity with the repair invoice — structural work, replaced panels, and airbag deployment support a higher damage factor.
Run the numbers with the diminished value calculator so you walk in with a specific figure.
Consider a licensed appraisal for larger claims — it carries far more weight than your own estimate and often pays for itself.
Counter the first offer in writing with your evidence, and escalate to your state Department of Insurance if State Farm won't move.

Get your number first

Enter your car's value, damage, and mileage for an instant 17c estimate — free, no email — so State Farm's first offer meets a prepared counter.

Open the Diminished Value Calculator →

Frequently asked questions

Does State Farm pay diminished value claims?

If a State Farm policyholder was at fault for your accident, State Farm generally owes diminished value on your third-party property-damage claim, and most states recognize this. Whether State Farm must pay diminished value to its own policyholder (a first-party claim) depends on your state and policy — Georgia requires it after the Mabry decision, but many states allow insurers to exclude first-party diminished value.

What is the Mabry v. State Farm case?

Mabry v. State Farm was a Georgia class-action decided in 2001 that required State Farm to assess and pay diminished value to its own Georgia policyholders. The court-endorsed valuation method from that case became known as the 17c formula, which is still the industry's baseline for estimating diminished value today.

How do I file a diminished value claim with State Farm?

Open a claim with State Farm for the accident (third-party if their insured hit you), state clearly that you are also claiming diminished value, and submit your evidence: your car's pre-accident market value, the repair invoice showing severity, a 17c estimate, and comparable listings or a licensed appraisal. Keep everything in writing and treat the first offer as a starting point.

How much diminished value will State Farm pay?

There is no fixed amount. Insurers often start from the 17c formula, which caps the estimate at 10% of the car's pre-accident value and reduces it for damage severity and mileage. That figure is a conservative floor — an independent appraisal frequently supports a higher number, especially on newer or in-demand vehicles.

What if State Farm denies or lowballs my diminished value claim?

Treat the first response as an opening position. Counter in writing with your 17c estimate, a licensed diminished-value appraisal, and comparable listings of similar cars with and without accident history. If State Farm will not move and you believe you are owed, escalate to your state Department of Insurance or consult an attorney.

What to do next

Diminished Value Calculator →Get your 17c estimate before you talk to the adjuster. How to File a Diminished Value Claim →The full playbook for any insurer, start to finish. GEICO Diminished Value Claim →Claiming against GEICO instead? Here's that guide.

Disclaimer: This guide is educational and independent. AntiFraud News is not affiliated with, endorsed by, or representing State Farm or any insurer. "State Farm" is used only to identify the company for consumers. This is not legal advice; diminished value rules depend on your state and policy. For a binding figure or advice, consult a licensed appraiser or attorney and confirm rules with your state Department of Insurance.