Washington Tort Law: Liability Standards and Comparative Fault

Washington tort law governs civil liability for harms caused by wrongful acts, establishing the standards under which injured parties may seek compensation from those whose conduct caused injury. This page covers the foundational liability rules, the state's comparative fault framework, common tort scenarios arising under Washington statutes and case law, and the decision boundaries that determine how fault is allocated and damages are calculated. Understanding these standards is essential for grasping how Washington courts distribute responsibility across parties in civil disputes.

Definition and scope

Tort law in Washington State operates as a body of civil law — distinct from criminal law — under which a person or entity whose unreasonable conduct causes harm to another bears legal responsibility for resulting damages. The primary sources of Washington tort doctrine are the Washington Revised Code (RCW) and published Washington Supreme Court and Court of Appeals decisions that interpret and develop common law principles.

Washington recognizes three principal tort classifications:

1. Intentional torts — acts carried out with purpose or substantial certainty of causing harm (e.g., assault, battery, trespass, conversion).
2. Negligence — the failure to exercise the care that a reasonably prudent person would exercise under the same or similar circumstances, producing foreseeable harm.
3. Strict liability — liability imposed regardless of fault or intent, typically applied to abnormally dangerous activities and, under product liability doctrine, to defective products that cause injury.

The foundational negligence elements — duty, breach, causation, and damages — are well established in Washington case law. The Washington Supreme Court addressed duty and breach standards extensively in decisions applying the Restatement (Second) of Torts, which Washington courts have long consulted as a persuasive reference alongside state precedent.

This page covers Washington State civil tort claims heard in state courts. It does not address federal tort claims governed by the Federal Tort Claims Act (28 U.S.C. §§ 2671–2680), tribal court tort jurisdiction (addressed separately under Washington Tribal Courts and Jurisdiction), or criminal prosecution of acts that may also constitute torts. Administrative agency actions under the Washington Administrative Code are outside this page's scope, as is contract-based liability addressed under Washington Contract Law Principles.

For a broader orientation to how civil claims move through state courts, see the conceptual overview of how the Washington legal system works.

How it works

Washington's Pure Comparative Fault Rule

Washington abolished contributory negligence as a complete bar to recovery in 1973 with the enactment of RCW 4.22, which established a pure comparative fault system. Under pure comparative fault, a plaintiff's recovery is reduced by the percentage of fault attributable to the plaintiff — but recovery is not barred even if the plaintiff is found 99% at fault. This distinguishes Washington from states using a modified comparative fault threshold (typically 50% or 51%), which bars plaintiffs whose share of fault meets or exceeds that threshold.

Allocation of Fault Among Multiple Defendants

RCW 4.22.070 governs joint and several liability in Washington. Under that statute, each defendant is generally liable only for the share of damages proportional to that defendant's percentage of fault — except that joint and several liability is retained for defendants acting in concert and for defendants whose fault exceeds 10% in cases involving economic damages. The trier of fact assigns percentage shares of fault to all parties, including nonparty tortfeasors identified through the fault allocation process.

The Fault Allocation Process — Structured Breakdown

1. Pleading and notice — The plaintiff files a complaint in Washington Superior Court alleging the elements of the applicable tort theory. Procedural requirements are set by the Washington Superior Court Civil Rules (CR).
2. Discovery — Parties exchange evidence regarding the nature of the alleged conduct, the causal chain, and the extent of damages.
3. Jury instruction on fault — The trial court instructs the jury using Washington Pattern Jury Instructions (WPI), published by the Washington State Supreme Court Committee on Jury Instructions. WPI 11.01 and related instructions define the reasonable care standard for negligence.
4. Special verdict form — The jury completes a special verdict allocating fault percentages across all identified parties.
5. Damages calculation — The court applies the fault percentages to reduce the plaintiff's total damages award under RCW 4.22.

Statutes of Limitations

Washington imposes time limits on filing tort claims. RCW 4.16.080 establishes a 3-year limitation period for personal injury and property damage claims. Medical malpractice claims carry a 3-year period under RCW 7.70.110, subject to a discovery rule that can extend the period in limited circumstances. Claims against governmental entities require an additional pre-suit tort claim notice under RCW 4.96.020, with a 60-day waiting period before suit may be filed. For a comprehensive treatment of time limits, see the Washington Statute of Limitations Guide.

Common scenarios

Motor Vehicle Negligence

Vehicle collision claims constitute a high volume of Washington tort litigation. Fault is assessed against the standard of the reasonably prudent driver. Washington's pure comparative fault rule means a plaintiff found 40% at fault for a collision still recovers 60% of proven damages. Insurance regulation by the Washington State Office of the Insurance Commissioner (OIC) affects settlement dynamics but does not alter the underlying tort liability standard.

Premises Liability

Property owners owe duties of care that vary by the visitor's status. Washington recognizes three classifications under common law:

• Invitees (business visitors and public invitees) — owed the highest duty: reasonable care to inspect and remedy or warn of dangerous conditions.
• Licensees (social guests) — owed a duty to warn of known dangers not reasonably discoverable by the licensee.
• Trespassers — owed a duty only to refrain from willful or wanton injury, with an elevated duty for discovered trespassers.

The Washington Supreme Court addressed the invitee/licensee distinction in cases interpreting Restatement principles. Child trespassers benefit from the attractive nuisance doctrine, which imposes a heightened duty where a landowner knows children are likely to trespass on a condition posing an unreasonable risk of serious harm.

Product Liability

Washington's Product Liability Act, codified at RCW 7.72, governs claims against product manufacturers, sellers, and distributors. The act establishes liability for products that are not reasonably safe in construction, design, or due to inadequate warnings. Fault is allocated under the same RCW 4.22 comparative fault framework applicable to other tort claims.

Medical Malpractice

Medical malpractice in Washington is governed by RCW 7.70. The plaintiff must establish that the provider failed to exercise the degree of care, skill, and learning expected of a reasonably prudent health care provider in the same specialty acting in the same or similar circumstances. Expert testimony is required in most cases to establish the applicable standard of care.

Defamation

Washington recognizes defamation claims for false statements of fact that damage reputation. Public figures must satisfy the actual malice standard from New York Times Co. v. Sullivan, 376 U.S. 254 (1964), requiring proof that the defendant knew the statement was false or acted with reckless disregard for its truth. Private figures need only prove negligence as to falsity. Washington's RCW 9.58 addresses criminal libel in a distinct statutory framework.

For terminology covering tort-related concepts within the broader Washington legal framework, see Washington Legal System Terminology and Definitions.

Decision boundaries

Pure vs. Modified Comparative Fault — The Washington Distinction

The most significant decision boundary in Washington tort law is the pure comparative fault rule under RCW 4.22. Unlike modified comparative fault jurisdictions that bar recovery at 50% or 51% plaintiff fault, Washington does not bar recovery based on the plaintiff's share of fault. A plaintiff found 75% at fault recovers 25% of total damages. This distinction directly affects litigation strategy and settlement valuation.

Intentional Torts vs. Negligence — Fault Allocation Limits

Under RCW 4.22.070(1)(b), joint and several liability is retained among defendants who act in concert. An intentional tortfeasor who causes harm alongside a negligent defendant may face full joint liability, whereas the negligent defendant's liability is generally limited to proportional share. Courts examine whether parties acted with a common plan or design to determine concert-of-action liability.

Strict Liability Threshold — Abnormally Dangerous Activities

Washington applies the Restatement (Second) of Torts §§ 519–520 framework to identify abnormally dangerous activities triggering strict liability. Factors include the high degree of risk of serious harm, the inability to eliminate the risk through reasonable care, the activity's lack of common usage in the community, and its inappropriate location. Blasting operations and the storage of large quantities of explosive or toxic materials have been recognized in Washington case law as candidates for strict liability analysis.

Governmental Immunity and Waiver

Washington's sovereign