Equal Pay Laws in Washington: Gender Pay Gap Protections

The federal Equal Pay Act, 42 U.S.C. Section 206(d), requires that employers pay employees of different genders the same wages for substantially similar work in the same establishment. The Act covers all employers subject to the Fair Labor Standards Act, which generally means employers with at least two employees engaged in interstate commerce. The law prohibits wage discrimination based on sex and applies to all forms of compensation including base wages, bonuses, overtime, and benefits.

Under the Equal Pay Act, an employee must prove that an employer paid different wages to employees of different genders for substantially similar work. The work need not be identical, but it must be substantially equal in skill, effort, and responsibility, and must be performed under similar working conditions. The EEOC enforces the Equal Pay Act and can file lawsuits on behalf of employees. Employees can also file private lawsuits seeking back pay (adjusted for inflation), liquidated damages equal to back pay, and attorney fees. The statute of limitations is two years for willful violations and three years for willful violations.

Washington State's equal pay law, codified at RCW 49.58.010 and following, is significantly stronger and broader than the federal Equal Pay Act. Washington's law prohibits wage discrimination based on gender and applies to all employers in the state, regardless of size or interstate commerce involvement. The state law covers all forms of compensation, defined broadly to include base salary, bonuses, commissions, overtime, stock options, benefits, and any other payment or reward provided by the employer for work performed.

Under Washington law, employers must provide equal compensation to employees of all genders for "substantially similar work." Unlike the federal standard that focuses on work being performed "in the same establishment," Washington's law applies on a broader basis without the geographic limitation. This means an employer could be liable for pay disparities even if employees work in different locations, as long as they perform substantially similar work.

Washington's statute of limitations for filing complaints is three years from the date of wage discrimination, compared to the federal two-year standard for non-willful violations (three years for willful violations under federal law). The state law is enforced by the Washington Department of Labor & Industries, which has authority to investigate complaints, conduct audits, and seek remedies on behalf of employees.

The state law includes specific defenses available to employers at RCW 49.58.020. An employer may pay different wages if the difference is based on a seniority system, merit system, system measuring earnings by quantity or quality of production, or a bona fide factor other than gender. However, the burden is on the employer to prove that one of these defenses applies. Washington does not allow the federal defense of "prior salary" to justify pay disparities, making it significantly more protective than federal law.

Washington's equal pay law contains narrow exceptions codified at RCW 49.58.020 that allow employers to justify pay differences based on gender. An employer may defend a pay disparity by proving it results from (1) a bona fide seniority system based on length of service; (2) a bona fide merit system measuring work performance; (3) a system measuring earnings by quantity or quality of production; or (4) a bona fide factor other than gender, such as education, training, or experience directly related to the job.

However, Washington courts and the Department of Labor have applied these exceptions narrowly. The "prior salary" or "prior compensation" defense, which is often used in other jurisdictions, is explicitly not available under Washington law. An employer cannot justify lower pay for a woman by citing that she was paid less in a prior job. This significantly restricts the defense available to employers compared to federal law.

The law applies equally to all employees regardless of job classification. Independent contractors and certain employee categories are not automatically exempt, though the classification as employee versus contractor may affect coverage in some circumstances. Union employees covered by collective bargaining agreements may have different protections depending on the contract terms, but the state law is not preempted by federal labor law or collective bargaining agreements.

Step 1: Document the wage discrimination. Collect pay stubs, employment contracts, job descriptions, and records showing your duties and responsibilities. Compare your compensation to similarly situated employees of different genders, documenting the amounts and dates of all forms of compensation received. Keep records of job performance evaluations and any communications from management about your pay. Create a timeline documenting when you became aware of the pay disparity and any complaints you made internally. Take screenshots or photos of relevant documents and save emails discussing compensation.

Step 2: File an internal complaint if your employer has a complaint procedure. Many employers have HR departments or grievance procedures. Send a written complaint to HR documenting the wage discrimination, the employees you are comparing yourself to, and the wage gap. Keep a copy of this complaint and any written response from the employer. This step is not legally required but creates documentation and may preserve your claim if your employer has a policy requiring internal notice. The employer may investigate or attempt to remedy the situation internally.

Step 3: File a complaint with the Washington Department of Labor & Industries. The agency does not charge a filing fee and accepts complaints in writing, by phone, or online. Visit www.lni.wa.gov and locate the Equal Pay information or contact the Wage and Hour Division. Provide your name, the employer's name and address, the names of employees paid differently, specific wage amounts and dates, and a description of the substantially similar work. You have three years from the date of the wage discrimination to file your complaint. Include copies of any pay stubs, job descriptions, and internal complaints as evidence.

Step 4: Cooperate with the Department of Labor investigation. Once your complaint is filed, the department will investigate the employer's pay practices. You will likely be contacted by an investigator who will ask questions about your job duties, work history, and the individuals you are comparing yourself to. The investigator will also contact the employer and request payroll records, job descriptions, and documentation of the employer's compensation systems. The investigation typically takes 30 to 90 days, though complex cases may take longer. You have the right to receive updates on the investigation's status.

Step 5: Consult an employment attorney if the investigation does not resolve the matter or if you want legal representation. Contact a Washington employment law attorney who specializes in discrimination claims. Many attorneys work on contingency, meaning they take a percentage of the recovery rather than upfront fees. Your attorney can review the investigation results, negotiate with the employer, or file a lawsuit in state or federal court if necessary. An attorney can also help you understand whether you qualify for liquidated damages and attorney fees under the law.