Car insurance claims in Washington

Washington is an at-fault state, and it applies the shared-fault rule in its purest form. RCW 4.22.005 provides that in an action based on fault seeking damages for injury or death to person or harm to property, contributory fault chargeable to the claimant diminishes proportionately the amount awarded as compensatory damages, «but does not bar recovery». There is no percentage threshold anywhere in the section, so a driver found ninety percent responsible still recovers the remaining ten percent of their loss — the practical difference between Washington and the modified-comparative states next door. RCW 4.22.015 defines the fault being compared, and it puts an unreasonable failure to avoid an injury or to mitigate damages inside the definition, so what a driver does after the crash is weighed in the same comparison as what they did before it. Personal injury protection exists here but is an offer rather than a mandate: RCW 48.22.085 requires that it be offered as an optional coverage on every new or renewed auto policy and lets a named insured reject it in writing, which is why no no-fault layer displaces the tort route.

The court deadlines are simpler than in most states, because one subdivision carries both. RCW 4.16.080 limits to three years the actions it lists, and subdivision (2) covers «an action for taking, detaining, or injuring personal property … or for any other injury to the person or rights of another not hereinafter enumerated». Vehicle damage and bodily injury therefore share a single three-year clock from the accident. Suing the insurer itself on the policy is a written-contract action with six years under RCW 4.16.040(1), but that is a ceiling rather than a real deadline: the policy will contain its own suit-limitation clause, and RCW 48.18.200(1)(c) only forbids that clause from running shorter than one year, voiding anything shorter without disturbing the rest of the contract. Before suing a first-party insurer for an unreasonable denial under the Insurance Fair Conduct Act, a claimant must give twenty days’ written notice to both the insurer and the Insurance Commissioner; the limitation period is tolled for those twenty days, and a mailed notice is deemed received three business days after it goes out (RCW 48.30.015(8)). The superior court may treble actual damages where it finds the insurer acted unreasonably (RCW 48.30.015(1)–(2)).

The insurer’s clocks come from chapter 284-30 of the Administrative Code, and the unit switches between sections — reading one deadline in the unit of another is the commonest mistake made with this chapter. Acknowledgement is in business days: ten business days to acknowledge a notification of claim under an individual policy, and the same ten for any later communication that reasonably suggests a reply is expected (WAC 284-30-360(1), (3)). Investigation and decision are in calendar days: thirty calendar days to complete the investigation unless it reasonably cannot be completed, with written reasons then owed every thirty days (WAC 284-30-370(1)), and thirty calendar days to tell a first-party claimant in writing whether the claim is accepted or denied, citing the exact provision relied on (WAC 284-30-380(1)). Payment returns to business days: fifteen to pay once properly executed releases arrive, twenty to furnish a release the insurer owes, three for a settlement draft to be honoured (WAC 284-30-330(15), (16)), and five to answer a supplemental estimate or final invoice from the chosen repair shop (WAC 284-30-390(1)(b)(iii)). One provision is worth knowing before you need it: an insurer still negotiating with an unrepresented claimant must give written warning that a limitation period is about to expire — thirty calendar days ahead for a first-party claimant, sixty for a third-party claimant (WAC 284-30-380(5)). These sections all carry a rulemaking filed 18 August 2026 and effective 18 October 2026, so the wording above is current only up to that date.

On cover, on settlement and on paperwork. Every driver of a vehicle registered in Washington must carry a liability policy at the limits of RCW 46.29.090 — twenty-five thousand dollars for bodily injury to or death of one person, fifty thousand for two or more, ten thousand for property damage — or be self-insured, bonded, or covered by a certificate of deposit (RCW 46.30.020(1)(a)). Underinsured motorist coverage, which in Washington folds the wholly uninsured vehicle, the hit-and-run and the phantom vehicle under one name, must be included at the policy’s own liability limits unless a named insured or spouse rejects it in writing; it reaches physical damage to the insured vehicle, with a statutory deductible cap of three hundred dollars for a hit-and-run or phantom vehicle and one hundred dollars otherwise (RCW 48.22.030(2)–(4), (7)). Total-loss settlement is regulated in unusual detail: comparable vehicles must come from within a hundred and fifty miles of the principally garaged area, applicable government taxes and fees belong inside the settlement amount, and the file must be reopened if within thirty-five calendar days of final payment the claimant cannot buy a comparable vehicle for the agreed figure (WAC 284-30-391). Deductions for betterment and depreciation are capped to the lesser of the increase in actual cash value and the value of the expired life of the part (WAC 284-30-390(7)). A driver must file a written report within four days of an accident causing injury, death, or apparent damage of one thousand dollars or more to any one person’s property, unless an investigating officer files it instead — the four days are in RCW 46.52.030(1), and the thousand dollars is set by rule at WAC 446-85-010, in force since 1 January 2015; the five hundred dollars printed in the statute is the 1987 starting figure, not the current threshold. Whether Washington recognises a diminished-value claim for the residual loss in a repaired vehicle’s market value could not be verified against a primary text and is not stated here: the word «diminish» appears nowhere in WAC 284-30-390, -391 or -392, and no Washington opinion could be read for this page because the state courts’ own host refused every connection.