Washington Workers Compensation Rules for Employers

The first time I helped a founder set up payroll in Washington, he had already spent two days collecting quotes from insurance brokers. All of them told him the same thing in slightly different words, and none of them told him the actual answer, which is that in Washington there is nothing to quote. You cannot buy a workers compensation policy from a private carrier here. You open an account with the state and that is the whole shopping process.

That surprise is the cheap one. The expensive surprise comes later, when an employer who assumed the state policy worked like a policy anywhere else discovers that it does not include the liability half at all. Or when a business that hired its first employee in March finds out the coverage obligation started in March, not at some headcount it was waiting to reach.

This page covers one thing: what Washington specifically requires of an employer. That means who must be covered, where the policy comes from, what it costs, which posters and deadlines apply, what happens if you go without, and what to do when someone gets hurt. If you want the general mechanics of how workers compensation works as a system, that lives in our guide to workers compensation insurance.

Get these workers compensation rules right before your first hire and neither surprise reaches you. For the rest of Washington employment law, from paid sick leave to the Mini-WARN Act, the Washington compliance guide is the broader map.

Who Must Be Covered in Washington

Coverage becomes mandatory with your first worker. Washington sets no headcount threshold at all, which puts it in the strictest tier of states. L&I frames the duty as a default rather than a trigger: you must provide coverage for any worker who does not meet the rules for exemption.

That phrasing matters more than it looks. In states with a threshold, an employer counts heads and decides. In Washington the employer starts from the position that everyone is covered and then checks whether a specific worker falls into a listed exclusion. Part-time staff, seasonal staff and minors are all covered. So is a minor working for a parent in the family business, with one narrow farm exception.

You open your L&I account by filing a Business License Application through the Department of Revenue at dor.wa.gov, indicating that you are hiring. If the business already exists, you re-file the same application to add the hiring endorsement. L&I then assigns your risk classifications and an account manager.

Who Is Excluded from Mandatory Coverage

The exclusion list is statutory and closed. One section of the Revised Code of Washington, RCW 51.12.020, names every category, and if a worker is not on it, the worker is covered. Most exclusions are also optional in the other direction: an excluded person can usually buy elective coverage by application to L&I.

Two entries on that list cause most of the real trouble. The domestic worker rule flips once a household regularly employs two or more people for 40 or more hours a week. You count across the whole household, not one worker at a time, and at that point all of them must be covered.

The officer exclusion is not a box you tick on a form. It depends on being a real director and shareholder with real control, so a titled officer who spends the day doing the same work as the crew is not excluded. The full statute is at app.leg.wa.gov.

Where the Policy Comes From

There is one seller. Washington operates a monopolistic state fund, so a workers compensation policy can only be bought from the Department of Labor & Industries, and private insurance companies are not permitted to write the coverage in this state. The only alternative is certified self-insurance, and that door is narrow.

The fund is financed entirely by premiums paid by employers and workers, not by general tax revenue. L&I manages every claim and pays every benefit out of it. With one seller, there is no carrier to pick, no broker relationship to manage, and no renewal to shop around every year. The paperwork is uniform too, which is one genuine advantage for a small employer without an HR department.

Employers Liability Has to Be Bought Separately

Washington law gives employers broad immunity from being sued by their own injured workers, which is the trade for mandatory coverage. L&I puts it plainly in its employer guide: in return for providing coverage, your worker ordinarily cannot sue you for damages.

That word ordinarily matters. RCW 51.24.020 preserves a cause of action, meaning the worker’s right to sue, where an injury results from the employer deliberately intending to produce it. The worker may then recover damages in excess of the statutory benefits.

Nothing in the L&I policy responds to a lawsuit like that, or to the lawsuits that arrive through a third party rather than the worker. Because that protection never comes with the state account, many employers here carry a gap they never chose.

The market answer is a stop-gap employers liability endorsement, an add-on attached to a commercial general liability policy written by a private insurer. Ask your commercial insurer whether the endorsement is on your policy and what its limits are.

Self-Insurance and What It Takes

Self-insurance is real but it is not a small business option. The Washington Administrative Code, in WAC 296-15-021, requires an applicant to show a net worth of $25 million, or revenue of $50 million, or annual workers compensation premium payments or loss costs of $1 million.

The rule says those figures are to be adjusted once every five years as indexed to the U.S. Consumer Price Index beginning in 2025, yet no adjusted figure appears in either official source. The current WAC text still carries the base amounts, and L&I’s Employers’ Guide to Self-Insurance (April 2025 edition) lists the same three.

On top of the financial test, the employer must have been in business for three years without substantial changes in principal ownership, structure or operations. It must also have had a written accident prevention program meeting the standards of the Division of Occupational Safety and Health (DOSH) in place for at least six months before applying.

The application needs three years of audited financial statements, and the employer must carry excess insurance. Applicants, publicly traded or privately held, need a credit rating of investment grade or higher. Once approved, a self-insured employer administers its own claims and pays every benefit from company funds. L&I lists the application documents on its how to self-insure page.

What It Costs and Who Pays

Washington prices premium by the hour worked, not per $100 of payroll. Every business gets one or more of the state’s 326 risk classifications, each with its own hourly composite rate, and you multiply that rate by the hours your employees actually worked. Paid sick leave, vacation and holiday hours are not reported. Overtime hours count one to one even though you paid time and a half.

The composite rate has four parts: the accident fund, the medical aid fund, the Stay at Work program, and the supplemental pension assessment. Only the accident fund is paid entirely by the employer.

According to the L&I employer guide, state law lets a state fund employer collect from each worker up to one-half of the medical aid, Stay at Work and supplemental pension amounts. Your rate notice prints the exact maximum hourly withholding. Deducting more than that authorized amount is a gross misdemeanor under RCW 51.16.140.

The 2027 rate cycle points the same way. On its 2027 rates page, L&I proposes another 4.9 percent rise in the average hourly rate, with higher base rates for 311 of the state’s 326 risk classes. It puts the average worker share at about 24 percent of premium, or 25 percent counting retrospective rating refunds.

Premium reports are quarterly. They are due no later than the last day of the month following the end of the quarter, which means April 30, July 31, October 31 and January 31.

If you have an open account, you file even in a quarter with no payroll, marked as a zero report, and late filing draws a fee. L&I audits employment records to verify that hours and payroll were reported into the right classification, so keep the underlying timecards.

There is money flowing the other way too. The Stay at Work program reimburses eligible employers for 50 percent of the base wages paid for approved light-duty work.

For injuries on or after January 1, 2025, Stay at Work covers up to 120 days worked and $25,000 per claim, with expense reimbursement up to $5,000 for tools and equipment, $2,000 for training and $1,000 for clothing. Earlier injuries use the old caps of 66 days and $10,000.

Posters and What a New Hire Actually Gets

Washington enforces posting, not handouts. L&I requires you to obtain a certificate of coverage and post it conspicuously in your place of business, with a separate certificate for each location you operate. The certificate is issued when your account opens, and replacements come from the L&I verification tool.

Beyond the certificate, L&I sends three posters that have to be displayed where employees can see them. The injury notice comes in two versions, one for state fund employers and one for certified self-insured employers, so you post the one that matches how you are insured.

Now the part employers ask about most: Washington does not require a workers compensation pamphlet to be handed to a new hire. There is no state analogue to the new-employee claim brochure some states mandate. The workers compensation obligation at hire is the posting obligation, and it is satisfied by the certificate plus the three posters.

Order free copies of the posters from the L&I required posters page, and remember that Washington has separate at-hire notice duties for paid sick leave and paid family leave that sit outside Title 51, the workers compensation part of the code.

For a remote or distributed team, send the same materials electronically with confirmation of receipt, and keep the receipts. Placement matters too: the injury notice poster is the document that tells a hurt worker what to do next, so it belongs where people actually stand, not in a binder.

Reporting Deadlines That Actually Bind

Washington splits the clock into two very different halves. The claim deadlines are long and generous to the worker. The safety reporting deadlines are short, absolute, and apply to every employer in the state regardless of industry or coverage status.

The 8-hour and 24-hour lines are the ones to write on the wall. They come from WAC 296-27-031, and they are not conditioned on having an L&I account, which is deliberate: an uninsured employer with a fatality is still legally required to make that call.

Penalties for Going Without Coverage

Washington does not treat missing coverage as a paperwork lapse. It is a criminal offense with civil penalties layered on top, and the penalties are written so that an employer who guessed wrong pays for the injury itself, not just for the premium it skipped.

Read the first two rows together, because they stack. Under RCW 51.48.010, an uninsured employer with one injured worker can be assessed 50 to 100 percent of what that claim costs, and separately up to $1,000 or double the accrued premiums, whichever is greater. Claim costs in a serious injury run far past any premium the business avoided.

The stop work order in RCW 51.48.022 has a narrower reach than employers assume: it applies to work requiring contractor registration under chapter 18.27 RCW or licensing under chapter 18.106 or 19.28 RCW, so construction, plumbing and electrical trades.

A stop work order takes effect immediately when served or posted at the worksite, and violating it carries $1,000 a day. To keep operating during an appeal, the employer must post a cash deposit or bond of $5,000 or $1,000 per covered worker identified, whichever is greater.

One more rule catches owners winding a business down. RCW 51.48.055 makes officers, members, managers and anyone with control over industrial insurance payments personally liable for unpaid premiums, interest and penalties accrued during their period of control, where they willfully failed to pay. Dissolving the entity does not clear it.

What to Do When Someone Is Hurt, in Order

When someone is hurt, get them medical care, make any emergency report the injury calls for, then document it and answer what L&I sends you. The sequence below is the L&I process, not a generic checklist. You do not file the claim: in Washington the worker and the treating provider open it, and the provider submits the Report of Accident.

Two Washington-specific habits pay for themselves. Register the L&I account before the first start date rather than after, because the penalty clock in RCW 51.48.010 runs from the moment a worker is on the job uncovered. And reconcile the hours you report against timecards every quarter instead of at audit, since misreported hours are what turns a routine audit into a premium assessment.

Frequently Asked Questions