Washington Workers’ Comp for Subcontractors: Rules Explained

February 14, 2026

In Washington, workers’ compensation rules are strict, especially for construction businesses. Here’s what you need to know:

  • General contractors are responsible for ensuring subcontractors comply with workers’ comp laws. If a subcontractor fails to pay premiums, the general contractor can be held liable.
  • Subcontractors must meet specific requirements to qualify as independent contractors. This includes passing a 7-part test and maintaining an active account with the Department of Labor & Industries (L&I).
  • Simply issuing a 1099 form or having a UBI number doesn’t exempt workers from coverage. Washington uses its own criteria to classify workers.
  • L&I has increased premiums by 4.9% for 2026, making compliance even more critical to avoid financial penalties.
  • Penalties for non-compliance include unpaid premiums, interest, audits, and potential legal action.

To stay compliant:

  • Verify subcontractors’ L&I accounts annually using the "Verify a Contractor" tool.
  • Keep detailed records of all verifications.
  • Include compliance clauses in contracts requiring subcontractors to maintain coverage.

Failure to follow these rules can result in audits, fines, and lawsuits. Protect your business by understanding and adhering to these regulations.

Workers’ Compensation What Do I Do About Subcontractors

Who Must Carry Workers’ Compensation in Washington?

In Washington, nearly all employers are required to provide workers’ compensation coverage, either through the Department of Labor & Industries (L&I) or an approved self-insurance program.

For the construction industry, the rules are even more specific. According to Washington law (RCW 51.12.070), the entity awarding a contract is responsible for workers’ compensation premiums tied to that contract. This means general contractors are liable for premiums related to their subcontractors unless the subcontractors meet specific exemption criteria.

What General Contractors Must Do

General contractors need to ensure that their subcontractors have an active industrial insurance account in "good standing" with L&I. To stay compliant, you must:

  • Verify subcontractors’ L&I accounts within one year before awarding a contract and update this verification annually.
  • Use L&I’s "Verify a Contractor" tool to confirm the account status. This tool provides a confirmation number valid for one year.

To avoid liability for premiums, subcontractors must meet several requirements. They must be properly registered or licensed, have a qualifying principal business address, maintain separate business records, and keep an active L&I account. If L&I notifies you in writing about a change in a subcontractor’s account status, you become responsible for premiums starting from the date of that notice.

Keep detailed and dated documentation of each verification. If your direct subcontractor fails to verify the status of lower-tier subcontractors, you won’t be held liable as long as you’ve properly verified your direct subcontractor’s account.

On the other hand, subcontractors must ensure they comply with their own coverage obligations to avoid any compliance issues.

What Subcontractors Must Do

Subcontractors must secure their own workers’ compensation coverage if they have employees or if they do not qualify for Washington’s independent contractor exemption. Meeting the exemption requires compliance with all seven test criteria, including proper registration or holding a valid electrical contractor license.

A subcontractor’s account is considered in "good standing" if the business is registered with L&I, holds a non-revoked certificate of coverage, has submitted all required reports within the past year, and is current on payments or payment agreements. Additionally, Washington counties and cities will not issue construction permits unless proof of industrial insurance or payroll estimates and paid premiums are provided.

How Washington Classifies Workers

Washington Worker Classification Guide: Employee vs Independent Contractor vs Construction Subcontractor

Washington Worker Classification Guide: Employee vs Independent Contractor vs Construction Subcontractor

Washington applies a universal coverage presumption, meaning all workers are entitled to workers’ compensation unless they meet specific, narrowly defined exemptions. Simply being classified under a federal tax category, like receiving a 1099 form, does not automatically exempt a worker from coverage. Below is an explanation of how worker status is determined.

What Determines Worker Status

The classification process begins with the Personal Labor Test. Workers are considered exempt only if they provide their own employees or operate heavy, specialized equipment – like earth-moving machinery or CNC machines – along with the expertise to use it. Standard tools such as drills, saws, or ladders don’t meet this threshold for specialized equipment.

If a worker does not pass the Personal Labor Test, they must meet all six criteria to qualify as an independent contractor. For construction workers, an additional seventh criterion applies. The most critical factor across these criteria is independence, both in the terms of their contract and in actual practice. Any signs of employer control, such as supervising tasks, setting schedules, or providing tools, typically mean the worker is covered under workers’ compensation.

For those in construction, the seventh requirement is crucial: they must be properly registered as a contractor under RCW 18.27 or hold a valid electrical contractor license under RCW 18.106 or 19.28. Simply having a Unified Business Identifier (UBI) number is not enough to establish independent contractor status.

Worker Classification Comparison

Feature Employee Independent Contractor (Exempt) Construction Subcontractor
Control Directed and controlled by the employer. Operates independently, per contract and in practice. Operates independently; must hold contractor registration.
Equipment Uses tools and equipment provided by the employer. Supplies heavy/specialized equipment or employs their own workers. Provides their own tools and labor; registered with L&I.
Registration Not required. Must have a UBI and active state tax accounts. Must hold valid contractor registration or license.
Records No separate business records. Must maintain separate business books and records. Must maintain separate business books and records.
IRS Status Receives a W-2 form. Files a schedule of expenses with the IRS. Files taxes as a business entity.
Workers’ Comp Employer covers premiums. Exempt if all 6/7 criteria are met. Responsible for their own premiums; the general contractor may be liable if the subcontractor fails to pay.

Remote workers, teleworkers, and app-based workers are held to the same strict exemption tests. In many cases, app-based workers are classified as employees because the platform dictates pay rates and provides detailed instructions on how tasks should be performed.

Liability Risks for General Contractors

Liability Under Washington Law

In Washington, general contractors bear primary responsibility for workers’ compensation premiums, even when subcontractors have their own employees. This is clearly stated in RCW 51.12.070:

"The person, firm, or corporation who lets a contract for such work is responsible primarily and directly for all premiums upon the work…"

This means general contractors remain liable unless they confirm that subcontractors are in compliance with the law.

Additionally, general contractors face potential vicarious liability under WISHA. In the case of Vargas v. Inland Washington, L.L.C., the court emphasized that general contractors hold the primary duty to ensure workplace safety:

"Our precedent therefore places ‘prime responsibility for safety of all works . . . on the general contractor’ . . . because ‘the general contractor is in the best position to coordinate work or provide expensive safety features to protect employees of subcontractors.’"

These risks highlight the importance of maintaining proper documentation and ensuring compliance with safety and legal standards.

When General Contractors Share Liability

Liability risks extend beyond workers’ compensation premiums. Various situations can lead to shared liability, especially if contractors fail to verify subcontractors’ compliance with the Department of Labor & Industries (L&I).

For instance, in Afoa v. Port of Seattle, a jury initially awarded $40,000,000 to a subcontractor’s employee injured on the job. Although the Washington Supreme Court later clarified that liability hinges on whether the contractor had a "sufficient degree of control" over the work, the case underscores the financial risks general contractors face.

Exercising too much control over subcontractors can also lead to reclassification issues. If a general contractor provides tools, supervises subcontractor employees, or otherwise exercises "direction and control", the Department of Labor & Industries may reclassify those workers as direct employees of the general contractor. This reclassification can significantly increase insurance premiums and other liabilities.

Finally, subcontractor employee lawsuits represent another major concern. Workers’ compensation laws typically shield employers from employee lawsuits, but they don’t prevent subcontractor employees from suing general contractors as third parties. These lawsuits can seek damages far beyond workers’ compensation benefits, including pain and suffering, which can result in substantial financial burdens.

How to Verify Subcontractor Compliance

Checking Department of Labor & Industries (L&I) Accounts

The Department of Labor & Industries (L&I) offers a free online tool called "Verify a Contractor, Tradesperson or Business" that helps you confirm a subcontractor’s workers’ compensation compliance. By entering their employer account ID, license number, UBI, or name, you can quickly check if their account is both "active" and "paid-to-date" – two critical indicators of compliance. Once verified, you can print a Certificate of Workers’ Comp Coverage directly from their business record. Be sure to keep this printed Certificate as evidence of your due diligence.

L&I updates its database every weekday by 5:00 a.m. Pacific Time, ensuring the information is current. Additionally, the tool’s Tracking Request feature can send you automated notifications if the subcontractor fails to pay premiums or if their license is suspended or revoked within a year. This feature is especially helpful for long-term projects, where coverage could lapse mid-job.

While verifying, be cautious of red flags, such as subcontractors claiming an unusually high number of "corporate officers" performing manual labor or those unable to provide proper documentation of their coverage status.

These steps are essential for ensuring compliance and preparing strong contract terms with your subcontractors.

Adding Compliance Clauses to Contracts

To safeguard your projects, include a clause in your contracts requiring subcontractors to maintain "active and paid-to-date" workers’ compensation coverage. Subcontractors should also provide a printed Certificate of Coverage before starting any work. You can further authorize L&I tracking requests to notify you of any lapses in their coverage.

For construction projects, ensure subcontractors are properly registered as contractors or hold a valid electrical contractor license. This aligns with Washington’s 7-part independent contractor test. For public works, require accurate reporting of risk classifications to avoid potential delays caused by misclassification. You might also include a clause allowing you to verify their risk classifications through the Contractor Portal before work begins.

Before signing any contract, check the Contractor Strike List and Debarred Contractor List to confirm the subcontractor isn’t barred from working due to past industrial insurance or prevailing wage violations. Clear and specific contract terms not only help you manage risks under Washington’s workers’ compensation regulations but also protect you from potential liabilities down the line.

Penalties for Misclassification and Non-Compliance

What Happens When You Misclassify Workers

Misclassifying workers can lead to more than just increased premium liabilities – it also brings serious compliance risks.

If the Washington State Department of Labor & Industries (L&I) finds that you’ve misclassified workers, you’ll be directly responsible for paying all unpaid premiums, along with penalties and interest. This applies whether you’ve incorrectly classified employees as independent contractors or failed to report workers who should have been covered. Misclassification over multiple periods or involving several workers can significantly amplify these costs.

A common misconception among businesses is that issuing an IRS 1099 form or requiring a UBI number automatically exempts workers from coverage. This is not the case. L&I uses its own tests to determine worker classification, regardless of federal classifications. For construction subcontractors, failing even one part of L&I’s 7-part test means you must provide workers’ compensation coverage for that individual.

General contractors face an added layer of risk. If your subcontractor neglects to pay their premiums, you could be held accountable for those unpaid amounts. To avoid this, ensure all subcontractors maintain current L&I accounts. Once L&I notifies you that a subcontractor’s account is no longer in good standing, you become liable for their premiums from that date forward.

How L&I Audits and Inspections Work

L&I enforces these penalties through meticulous audits, making accurate worker classification critical.

During an audit, L&I reviews your payroll records, contractor agreements, and quarterly reports. Investigators apply the Personal Labor Test and either the 6-part or 7-part test (for construction) to evaluate each worker relationship. Federal tax forms, such as IRS 1099s, are not accepted as proof of independent contractor status. Instead, L&I conducts its own analysis based on Washington’s specific criteria.

If you identify unreported hours before an audit, it’s best to amend your quarterly reports immediately. Taking proactive steps typically results in lower penalties compared to waiting for audit findings. L&I’s enforcement actions can range from premium assessments and interest charges to, in extreme cases, criminal charges.

To safeguard against potential audits, maintain thorough documentation showing how each contractor meets the exemption criteria. Keep records such as contractor registrations, business licenses, separate financial records, and IRS filings. A strong paper trail can make all the difference if L&I questions your classification decisions.

Workers’ Compensation Waiver Clauses in Contracts

What Waiver Clauses Are

A waiver clause is a provision in a contract where a subcontractor agrees to give up their immunity under Washington’s Industrial Insurance Act (Title 51 RCW). This allows a general contractor or property owner to recover costs if an employee files a lawsuit. Normally, workers’ compensation laws provide "exclusive remedy" protection, meaning an injured employee can collect workers’ compensation benefits but cannot sue their employer. However, with this waiver in place, a general contractor or property owner can seek reimbursement from the subcontractor if they incur costs due to a lawsuit by the subcontractor’s employee.

"By agreeing to this type of waiver… the subcontractor promises to defend and pay for claims brought by its own injured workers against the general contractor or owner."

For the waiver to be legally enforceable in Washington, it must be explicitly stated and mutually agreed upon by both parties. To ensure clarity, contracts often require the waiver clause to be initialed, showing that both parties understand its implications. A standard clause might read:
"SUBCONTRACTOR specifically and expressly waives any immunity that may be granted it under the worker’s compensation laws of any state, including but not limited to, Washington State Industrial Insurance Act, Title 51 RCW."

Understanding the purpose of these clauses is essential to grasp their limits and obligations, as explained below.

Limits of Waiver Clauses

Waiver clauses must be clearly written and prominently displayed in the contract. They cannot be buried in fine print or hidden within broader indemnity provisions. Subcontractors should also ensure their Commercial General Liability (CGL) insurance policy includes contractual liability coverage to help cover the financial responsibilities created by these waivers.

Importantly, a waiver clause does not exempt the subcontractor from maintaining an active L&I (Labor and Industries) account. Under Washington law (RCW 51.12.070), general contractors are still responsible for unpaid premiums, regardless of any waiver language. Properly crafted waiver clauses aim to limit each party’s liability to the specific harm they caused, ensuring fairness while protecting contractual obligations.

Conclusion

Washington’s workers’ compensation system is strict, leaving no room for missteps. Employers are required to provide coverage either through the Department of Labor & Industries (L&I) or certified self-insurance – private insurance simply isn’t an option. As clarified by the Washington Department of Labor & Industries, "A 1099 form is a federal form and has no bearing on Washington state workers’ compensation coverage".

For general contractors, the stakes are even higher. They can be held financially liable for subcontractors’ unpaid premiums unless they verify the subcontractor’s account status using L&I’s online system. Obtaining a confirmation number not only ensures compliance but also provides protection for one year. With L&I’s 2026 average premium increase of 4.9%, the financial risks tied to non-compliance are growing, along with increased enforcement efforts.

Misclassification of workers comes with serious consequences. According to L&I, "If your business is found to have workers that should have been reported for workers’ compensation, your business will be held responsible for unpaid premiums with penalties and interest". L&I’s Division of Occupational Safety and Health actively audits and inspects businesses, supported by a $2.7 billion biennial budget and over 3,300 full-time staff members.

To minimize risk, maintain thorough records for every independent contractor, ensuring they meet all seven exemption criteria. Always verify subcontractor L&I accounts before signing contracts and continue monitoring them throughout the project. These proactive steps can save your business from hefty penalties and unexpected liabilities.

Adhering to these rules is essential for operating legally in Washington’s construction industry. By following these practices, you not only safeguard your business but also maintain compliance on every project.

FAQs

What happens if a subcontractor’s L&I account lapses mid-project?

If a subcontractor’s L&I account becomes inactive during a project, the general contractor could end up footing the bill for unpaid workers’ compensation premiums. To steer clear of this, the general contractor needs to ensure that both their own business and the subcontractor meet all licensing and record-keeping rules. This includes verifying proper registration and maintaining accurate business records. Skipping these steps could leave the general contractor on the hook for any compliance problems.

Does having a 1099 and UBI make a worker exempt in Washington?

Having a 1099 form or a Unified Business Identifier (UBI) doesn’t automatically mean a worker is exempt from Washington’s workers’ compensation requirements. Whether someone qualifies for an exemption depends on meeting specific criteria outlined by the state – not just their tax forms or UBI registration. It’s essential to carefully review Washington’s guidelines to determine if a worker is truly exempt.

What records should I keep to prove subcontractor compliance?

To demonstrate that subcontractors comply with workers’ compensation laws in Washington, ensure you keep thorough records. This includes valid business registration and licensing, such as contractor registration numbers. Additionally, maintain financial operation documents like income and expense records, along with proof of a physical business location. It’s also crucial to have documentation showing compliance with the six- or seven-part tests outlined in RCW 51.08.180 and RCW 51.08.195 to verify their status as independent contractors.

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