Washington business insurance requirements

Washington is one of four states where private insurers cannot sell workers' compensation. Every employer with workers buys coverage from the Department of Labor & Industries (L&I) or qualifies to self-insure through it, and premiums are charged by the hour worked rather than by payroll, with part of the cost deducted from workers' pay. Because the state fund pays statutory benefits only, Washington employers buy employers' liability separately as stop gap coverage. Payroll also carries two state benefit premiums: Paid Family and Medical Leave and the WA Cares long-term care fund.

Workers' compensation requirements

L&I puts the market rule simply: "Washington State does not allow private workers' compensation coverage. You must purchase your coverage from L&I or be a certified self-insured employer" (L&I). There is no headcount threshold. The statute lists "the only employments" outside mandatory coverage (RCW 51.12.020). For businesses the important ones are sole proprietors and partners; corporate officers who are also directors and shareholders and who exercise substantial control in daily management; LLC members who would qualify under those rules; and domestic servants of a household with fewer than two full-time domestic employees. Owners who are excluded can request coverage in writing before an injury (RCW 51.32.030). See can owners and officers exclude themselves from workers' comp?.

Premiums work differently from other states. Each risk class has an hourly rate, and employers report hours worked quarterly, even for a quarter with no hours. Part of the premium (half the Medical Aid rate plus the Stay at Work and Supplemental Pension amounts) may be deducted from workers' pay, and an employer that skips the deduction still owes the full premium (L&I overview). L&I says employers pay about 75% of the premium and workers about 25%. The 2026 average rate rose 4.9%, about $1.37 a week per full-time position (L&I, 2026 rates), and on September 22, 2026 L&I proposed another 4.9% average increase for 2027, with final rates due November 30 (L&I, proposed 2027 rates). Because rates are per hour, wage growth does not raise premium automatically, which is why L&I adjusts rates each year. L&I runs its own experience rating, so a mod from an NCCI state does not carry over; see Monopolistic state funds: workers' comp in ND, OH, WA and WY.

Contractors face premium liability for their subs. The person letting a contract is primarily responsible for all premiums on the work, but a registered contractor is relieved of that liability if its subcontractor has an active L&I account and contractor registration (RCW 51.12.070). Check both before the sub starts. See independent contractors and workers' comp: the misclassification risk.

The penalties for working without an L&I account are steep (L&I penalties; RCW 51.48). If a worker is hurt before coverage is in place, the employer can be charged 50% to 100% of the claim's cost. The failure-to-register penalty is the greater of $1,301 or twice the premium owed, and violating a stop-work order costs $1,301 a day.

Stop gap: the coverage the state fund leaves out

An L&I account pays statutory benefits only. It does not include employers' liability, the Part Two coverage of a standard policy elsewhere. In Washington a worker can still sue the employer for damages beyond Title 51 benefits when an injury results from the employer's "deliberate intention" (RCW 51.24.020), and third parties can bring indemnity claims. Employers fill that gap with a stop gap coverage endorsement, usually on the general liability policy. Out-of-state employers sending crews here need an L&I account for the Washington work and stop gap for Washington on their own program (DES guidance). Details are in stop gap coverage in monopolistic states and employees in several states: other-states coverage and multistate workers' comp.

Disability and paid leave mandates

Paid Family and Medical Leave. Run by the Employment Security Department, Paid Leave covers both family leave and the worker's own serious health condition, so Washington has no separate temporary disability program. For 2026 the premium is 1.13% of gross wages, excluding tips, up to the Social Security cap of $184,500. Employees pay 71.43% of the premium and employers 28.57%; businesses with fewer than 50 employees do not owe the employer share but must still collect and remit the employee share (Paid Leave). Employers with 150 or fewer employees can apply for grants when a worker takes leave (small businesses). ESD recalculates the rate each October for the next year, so check the 2027 rate before year end.

WA Cares Fund. Washington's long-term care program has collected premiums since July 1, 2023: 0.58% of each employee's gross wages, with no wage cap, withheld from employees and reported with Paid Leave (WA Cares). Some employees hold approved exemptions and must give the employer a copy of the approval letter. Benefits are now available statewide, with a lifetime benefit of $36,500 in 2026, indexed to inflation (WA Cares benefits). See state disability and paid family leave programs: every mandate in 2026.

Commercial auto requirements

The financial responsibility minimums are $25,000 per person and $50,000 per accident for bodily injury and $10,000 for property damage (RCW 46.29.090). Those limits are far below what any contract will require. Interstate for-hire carriers need at least $750,000. See commercial auto insurance: what it covers and what it leaves out and FMCSA insurance requirements and filings for motor carriers.

The business insurance market in Washington

Floods, wildfire and earthquake drive property risk. FEMA declared major disasters for storms, flooding and landslides that began November 5, 2021 (DR-4635), the July 2024 wildfires (DR-4849), and storms, flooding and landslides that began December 5, 2025 (DR-4906). Standard property forms exclude flood and earth movement; NFIP commercial policies top out at $500,000 building and $500,000 contents (FloodSmart). See Commercial flood insurance: NFIP limits and private options and earthquake insurance for businesses: coverage, deductibles, limits.

Surplus line brokers pay a 2% premium tax for Washington home-state insureds, due March 1 for the prior year (RCW 48.15.120; 48.14.020), and the Surplus Line Association of Washington charges a stamping fee on top, 0.30% of premium for policies incepting on or after January 1, 2025 (SLAW). See surplus lines taxes, stamping fees and diligent search.

Liability law that affects premiums

Washington uses pure comparative fault: a claimant's own fault reduces the award proportionately "but does not bar recovery" (RCW 4.22.005). A plaintiff found 80% at fault still collects 20% of damages. Injury and property damage suits must be filed within three years (RCW 4.16.080), and actions on written contracts within six (RCW 4.16.040).

Where to get help

• Office of the Insurance Commissioner (insurance.wa.gov): 800-562-6900, 8:30 a.m. to 4:30 p.m. weekdays. File a complaint against an insurer or agent online; OIC regulates stop gap, liability and auto insurers but not L&I.
• Department of Labor & Industries (lni.wa.gov/insurance): Employer Services 360-902-4817 for workers' comp accounts and quarterly reports; contractor information 800-647-0982.
• Employment Security Department (paidleave.wa.gov) for Paid Leave and WA Cares reporting.

Confirm your obligations with L&I or a licensed broker, and compare states with the workers' comp and benefits requirements by state.