Washington Comparative Fault: How Your Share of Blame Changes a Crash Claim

A Washington driver found 90% at fault for a crash can still collect 10% of their own damages from the other driver. That's what "pure" comparative fault means, and it's written into RCW 4.22.005: your share of the blame shrinks what you recover, "but does not bar recovery."

That one sentence shapes every crash claim in the state, from a parking-lot bump in Spokane to a five-car pileup on I-5 through Tacoma. It decides how much the other driver's insurer pays you, how much of your deductible comes back, what your underinsured motorist coverage owes, and whether one driver can be stuck paying for another's share. Here's how it works, with the math worked out, and what I'd do after a crash so the fault split is based on evidence rather than on who argued harder.

Source: RCW 4.22.005; RCW 4.16.080; s. 768.81, Florida Statutes. $40,000 example is hypothetical.

What RCW 4.22.005 says

The whole rule is two sentences:

"In an action based on fault seeking to recover damages for injury or death to person or harm to property, any contributory fault chargeable to the claimant diminishes proportionately the amount awarded as compensatory damages for an injury attributable to the claimant's contributory fault, but does not bar recovery. This rule applies whether or not under prior law the claimant's contributory fault constituted a defense or was disregarded under applicable legal doctrines, such as last clear chance."

Put plainly: add up your damages, subtract your percentage of fault, and that's what you can recover. There's no cutoff. At 50% you get half. At 51% you get 49%. At 99% you'd get 1%, though nobody is going to sue over that.

The second sentence matters for history buffs and lawyers more than drivers. It wipes out old all-or-nothing doctrines like "last clear chance" and makes the proportional rule the only rule. The current text dates from 1981 (chapter 27, Laws of 1981) and hasn't been amended since. Claims arising before July 26, 1981 still fall under the older version of the law, which by now is a curiosity.

"Washington comparative negligence" and "Washington comparative fault" are used interchangeably in searches and in conversation. The statute's word is "fault," and it's defined more broadly than negligence, which is the next point.

• Washington (pure)
• Florida (more than 50% bars)

$0$50K$100K$150K

0%10%30%49%50%51%70%90%

Source: Calculated from RCW 4.22.005 and s. 768.81(2) and (6), Florida Statutes. Hypothetical figures.

Show the numbers

	Washington (pure)	Florida (more than 50% bars)
0%	$100K	$100K
10%	$90K	$90K
30%	$70K	$70K
49%	$51K	$51K
50%	$50K	$50K
51%	$49K	$0
70%	$30K	$0
90%	$10K	$0

Up to 50%, the two states give the same answer. Past 50%, Washington keeps paying a shrinking share and Florida pays nothing. If you've lived in both states, that's the single biggest difference in how a disputed crash plays out.

What counts as fault, and what doesn't

RCW 4.22.015 defines fault as acts or omissions "that are in any measure negligent or reckless toward the person or property of the actor or others." It also includes "unreasonable failure to avoid an injury or to mitigate damages." So fault isn't only about who caused the crash. Ignoring a doctor's treatment plan and letting an injury get worse can count against you too.

The same statute tells the fact-finder how to compare: consider "both the nature of the conduct of the parties" and "the extent of the causal relation between such conduct and the damages." Being a little over the speed limit is fault, but if it had nothing to do with the crash, it shouldn't carry much weight in the split.

A few Washington rules cut against what people assume:

Source: Revised Code of Washington, sections linked in the table (accessed October 23, 2026).

The one place Washington has a 50% bar

Pure comparative fault has a major exception for impaired claimants. Under RCW 5.40.060, it's a complete defense to an injury or wrongful death claim if the injured person was under the influence of alcohol or drugs, that condition was a proximate cause of the injury, and the fact-finder finds that person "more than fifty percent at fault." The test for "under the influence" is the criminal DUI standard in RCW 46.61.502.

There's a carve-out: if you're suing a driver who was impaired and whose impairment caused the crash, your own impairment doesn't create the defense unless it was a proximate cause of the crash itself. The short version is that an impaired driver whose impairment contributed to their injuries and who is more than 50% at fault gets nothing for those injuries, where a sober driver at 51% would get 49%.

Four worked examples

All four are hypothetical and simplified. "Damages" means what your losses are worth in a claim: medical bills, lost pay, car repairs, pain and suffering. Real claims also have to account for what your own PIP already paid, policy limits, and how strong the evidence is.

Example 1: the yellow light on Aurora Avenue

Say you're northbound on Aurora Avenue in Seattle and enter the intersection as the light turns from yellow to red. A driver turning left jumps the gap and you collide. The adjuster, and later a jury if it comes to that, puts fault at 70% on the turning driver and 30% on you. Your damages are $40,000. You recover $40,000 minus 30%: $28,000.

Example 2: mostly your fault, still a claim

Same $40,000 in damages, but this time you rear-ended a car that braked hard to make a late exit on I-90 near Issaquah. You're 90% at fault; the other driver is 10% for the abrupt, unsignaled move. In Washington you can still recover $4,000. In Florida, you'd get nothing.

Is a $4,000 claim worth pursuing? Sometimes. The more practical point is the other direction: the other driver can claim against your liability coverage for 90% of their damages.

Example 3: both drivers hurt

Pure comparative fault runs both ways. Take Example 1 and add that the turning driver was also injured, with $20,000 in damages. You're 30% at fault, they're 70%.

Source: Calculated from RCW 4.22.005. Hypothetical figures.

You were mostly in the right, and your liability coverage still pays $6,000. That's normal in a pure-fault state and it's one reason the minimum limits in RCW 46.29.090 ($25,000 per person, $50,000 per accident for bodily injury, $10,000 for property damage) run out faster than people expect.

Example 4: multi-car crashes and RCW 4.22.070

When more than one party caused the crash, RCW 4.22.070 has the fact-finder assign a percentage to every entity that caused the damages, including you, and the percentages must add up to 100. Then comes the part most people never hear about: each defendant's liability is generally "several only." Each one pays its own share and no more.

For car crashes, two exceptions matter. Defendants acting in concert, or an employer and employee (agent or servant), share responsibility. And if the injured person was not at fault at all, the defendants are jointly and severally liable for the sum of their shares, meaning you can collect the full judgment from any of them.

Say a three-car chain reaction in stop-and-go traffic on SR 520 leaves you with $100,000 in damages. Driver A carries $100,000 per person in bodily injury coverage. Driver B carries the state minimum of $25,000.

Source: RCW 4.22.070(1)(a)-(b); RCW 46.29.090 (minimum limits). Hypothetical figures.

Ten percentage points of your own fault cost you $10,000 of the award, and they also switched off joint and several liability. Now B's $15,000 shortfall is your problem, not A's. That gap is exactly what underinsured motorist coverage is built for: under RCW 48.22.030(1), a vehicle is underinsured when its liability limits are less than the damages you're "legally entitled to recover." Here you're entitled to $40,000 from B and B has $25,000. How your own policy pays that gap depends on its wording, so confirm it with your adjuster. The Washington UIM guide covers the rules.

One more multi-party wrinkle: if you settle with one driver, RCW 4.22.060 says your claim against the others is reduced by the amount paid (or by a reasonable amount set by the court). Settling with one party doesn't release the others unless the agreement says so.

How fault flows through your policy

Comparative fault is a rule about lawsuits, but adjusters work from it every day, because a claim settles for roughly what everyone expects a court to do. Here's where fault does and doesn't matter in a Washington auto policy.

Source: Washington Office of the Insurance Commissioner consumer pages; RCW and WAC sections linked in the table (accessed October 2026).

PIP pays first, fault aside

PIP is optional in Washington, but your insurer must offer it and you have to reject it in writing (RCW 48.22.085). The minimum package is $10,000 medical and hospital, $2,000 funeral, $10,000 income continuation at up to $200 a week, and $5,000 loss of services (RCW 48.22.095). In Example 2, where you're 90% at fault, PIP is the coverage that pays your medical bills without a fight about blame.

Your deductible and subrogation

When your collision coverage pays, your insurer can go after the at-fault driver to get its money back. That's subrogation. Under WAC 284-30-393, your insurer must include your deductible in its demand, and any recovery goes to you first for the deductible, "less applicable comparable fault." It also can't take expenses out of your deductible recovery unless it hires an outside attorney, and must update you within 60 calendar days of starting subrogation and at least every 180 days after that.

Example: a $1,000 deductible and a finding that you were 20% at fault. If the subrogation recovery covers it, you get back $800. The OIC puts it plainly: if you're partially at fault, "you'll only recover a percentage of your deductible." One warning from the same page: tell your insurer before you settle with the at-fault driver or their insurer, so you don't undercut its subrogation rights.

Washington vs. Florida, Oregon and Idaho

Washington's neighbors don't use a pure rule. Oregon and Idaho both have a cutoff, and they put it in different places. Florida switched from pure to modified comparative negligence in 2023 with HB 837, for lawsuits filed after March 24, 2023. The Florida comparative negligence post walks through that change.

Source: RCW 4.22.005; ORS 31.600 (2025 edition); Idaho Code 6-801; s. 768.81, Florida Statutes; ch. 2023-15, Laws of Florida. Simplified to a two-party case.

The Idaho line is the one that surprises people. Under 6-801, a driver found exactly 50% at fault in a two-car crash recovers nothing, because their fault is "as great as" the other driver's. A crash on I-90 just across the line in Post Falls can be decided by different rules than the same crash in Spokane Valley. Which state's law applies to a cross-border crash is a legal question for an attorney, not something to guess at.

The deadlines that protect a fault claim

Source: RCW and WAC sections linked in the table; claim-handling timelines as amended by WSR 26-17-089, effective October 18, 2026.

The three-year limit is the general rule. Claims involving minors, government vehicles or road defects, or wrongful death may have their own timing and notice steps, so talk to an attorney early in those cases. Florida's limit for negligence suits is two years, for comparison.

What to do after a crash

In a pure-fault state every percentage point is money in both directions. Most of what decides the split exists only for the first hour, so here's the order I'd work in.

1. Stop, help, exchange information. Name, address, insurance company, policy number, plate number, and show your license (RCW 46.52.020). In a damage-only crash, move the car out of the main lanes when you can; the statute says that doesn't affect fault.
2. Don't argue or concede fault. Describe what happened, stick to facts, and leave the percentages to the adjusters. "I'm so sorry, I didn't see you" can end up in a claim file.
3. Photograph before anything moves, if it's safe. Final positions, damage to every vehicle, skid marks, signals, signs, lane markings, light and weather. Where the damage sits on each car often decides the split.
4. Get witnesses yourself. Names and phone numbers. Ask nearby businesses about cameras quickly; footage gets overwritten. Save any dashcam clip the same day.
5. Report it. Know when a report is required and how to get the officer's report; the Washington car accident report guide covers the four-day rule and WSP records.
6. Notify your insurer promptly and open a PIP claim if you're hurt. PIP doesn't wait for a fault decision.
7. Challenge a fault split you disagree with. Ask the adjuster for the percentage and the reasons in writing, send your photos, witness names and report, and ask for a review. If your own insurer won't engage, the Office of the Insurance Commissioner's consumer advocacy line (800-562-6900) takes complaints. The OIC can look at how a claim was handled; it doesn't decide fault the way a court does.
8. Talk to an attorney for injury cases, disputed fault with real money at stake, or any crash with three or more vehicles, where the 0% vs. 10% difference in Example 4 can swing a lot.

My read

Pure comparative fault is forgiving to the driver who's mostly wrong and unforgiving to the driver who's only a little wrong but assumes it doesn't matter. Ten percent of a serious injury claim is real money, and as Example 4 shows, any fault at all on your side can turn off joint and several liability in a multi-car crash.

The coverage side is the part you control before anything happens. Because you can be paying the other driver even when you're mostly right, liability limits above the $25,000/$50,000/$10,000 minimums matter more here than people think, and UIM is what fills the gap when the other driver's limits don't. At renewal, check your declarations page for your liability limits, whether UIM matches them, and whether PIP is on the policy. If your assets are larger than your auto limits, an umbrella policy sits on top. You can also review how your Washington auto policy is put together.

FAQ

Is Washington a pure comparative fault state?

Yes. Under RCW 4.22.005, your share of fault reduces what you recover but does not bar recovery, even if you are more than 50% at fault. The main exception is RCW 5.40.060: an impaired injured person whose impairment helped cause the injury and who is found more than 50% at fault recovers nothing for the injury.

Can I recover damages in Washington if I was mostly at fault?

Yes. A driver found 90% at fault can recover 10% of their damages from the other driver. The other driver can also claim against your liability coverage for their damages, reduced by their own share of fault.

Is Washington a no-fault state for car insurance?

No. Washington is a fault-based state that requires liability insurance. PIP, which insurers must offer and you can reject in writing, pays your own medical and other benefits no matter who is at fault.

How long do you have to sue after a car accident in Washington?

Generally three years for injury to a person or damage to personal property, under RCW 4.16.080(2). Claims involving minors, government entities or wrongful death may have different timing, so confirm with an attorney.

Do I get my deductible back if I was partly at fault?

Partly. WAC 284-30-393 requires your insurer to include your deductible in its subrogation demand and pay recoveries to you first for the deductible, less your share of fault. At 20% fault on a $1,000 deductible, that is up to $800.

This is general education about Washington law, not legal advice, and every crash turns on its own facts. Your own policy wording and Washington law control how any claim is handled. Confirm your situation with a licensed agent, the Washington Office of the Insurance Commissioner, or, for fault, deadlines and other legal questions, a Washington attorney.

Sources

1. RCW 4.22.005, effect of contributory fault
2. RCW 4.22.015, "fault" defined
3. RCW 4.22.020, imputation of contributory fault
4. RCW 4.22.060, effect of settlement agreement
5. RCW 4.22.070, percentage of fault, several liability and exceptions
6. Chapter 4.22 RCW, full chapter with notes (1981 applicability)
7. RCW 4.16.080, actions limited to three years
8. RCW 5.40.050, breach of duty as evidence of negligence
9. RCW 5.40.060, intoxication defense
10. RCW 46.61.688, safety belts
11. RCW 46.52.020, duties after an accident
12. RCW 46.52.030, accident reports
13. WAC 446-85-010, reporting threshold
14. RCW 46.52.080, confidentiality of reports
15. RCW 46.29.090, minimum liability limits
16. RCW 48.22.030, underinsured, hit-and-run and phantom vehicle coverage
17. RCW 48.22.085, PIP offer and rejection
18. RCW 48.22.095, minimum PIP benefits
19. WAC 284-30-393, deductibles in subrogation demands
20. WSR 26-17-089, claims-handling rule amendments effective Oct. 18, 2026
21. Washington OIC: Personal injury protection (PIP)
22. Washington OIC: Learn how auto insurance works
23. Washington OIC: Filing an auto insurance claim
24. Washington OIC: File a complaint or check your complaint status
25. Florida Statutes s. 768.81, comparative fault (2026)
26. Chapter 2023-15, Laws of Florida (HB 837)
27. Florida Statutes s. 95.11, limitations (2026)
28. Oregon Revised Statutes chapter 31 (ORS 31.600), 2025 edition
29. Idaho Code 6-801, comparative negligence