Equal Pay Laws in Massachusetts: Gender Pay Gap Protections

The Equal Pay Act of 1963, codified at 42 U.S.C. Section 206d, requires employers to pay employees equally for equal work on jobs the performance of which requires equal skill, effort, and responsibility and which are performed under similar working conditions, except where such payment is made pursuant to a seniority system, a merit system, a system which measures earnings by quantity or quality of production, or a differential based on any other factor other than sex.

The federal law covers employers with 50 or more employees and is enforced by the Equal Employment Opportunity Commission (EEOC) and the Department of Labor (DOL). The federal statute of limitations is two years for willful violations and three years for non-willful violations. Remedies under federal law include back pay, front pay, and liquidated damages equal to unpaid wages. The federal standard requires jobs to be substantially equal in performance, and employers may defend unequal pay through legitimate affirmative defenses such as seniority systems, merit systems, or systems based on quality or quantity of production.

However, the federal Equal Pay Act has significant limitations. It applies only to gender-based pay discrimination and does not address other protected classes. Additionally, the affirmative defenses are broad and employers frequently succeed in defending unequal pay claims by asserting that different jobs are not "equal" in all respects or that pay differences stem from legitimate non-discriminatory factors.

Massachusetts General Law Chapter 149, Section 105a establishes the Massachusetts Equal Pay Act, which is substantially stronger and broader than the federal Equal Pay Act. The Massachusetts statute applies to all employers with one or more employees in Massachusetts, significantly lowering the threshold from the federal requirement of 50+ employees.

Massachusetts law prohibits employers from paying employees of one sex less than employees of another sex for substantially similar work. The "substantially similar work" standard is interpreted more generously to employees than the federal "equal work" standard. Under Massachusetts law, jobs need not be identical; they must only be substantially similar in terms of skill, effort, and responsibility under similar working conditions.

Crucially, Massachusetts law eliminates or severely restricts the affirmative defenses available under federal law. Employers cannot defend unequal pay based solely on seniority systems, merit systems, or production-based compensation systems. Massachusetts requires that any pay differential be justified by a factor other than sex, and the burden is on the employer to prove this factor is legitimate and applied consistently. Additionally, Massachusetts law explicitly covers pay discrimination based on gender, and courts have interpreted this to include discrimination based on gender identity and sexual orientation.

The remedies under Massachusetts law are robust. Employees are entitled to recover back pay, front pay, liquidated damages equal to the unpaid wages, plus attorney's fees and costs. The statute of limitations under Massachusetts General Law Chapter 149, Section 150 is three years for any wage violation, including equal pay claims. This is longer than the federal two-year standard for non-willful violations and matches the federal three-year period for willful violations.

Massachusetts Equal Pay Act contains limited exceptions compared to federal law. Employers may defend unequal pay only by proving the wage differential results from a factor other than sex, such as a genuine difference in job performance, production output, or specialized skill that is legitimately applied and consistently enforced. However, seniority systems and merit systems alone are insufficient defenses under Massachusetts law unless they are applied consistently and transparently.

The law does not apply to independent contractors or to individuals working under certain collective bargaining agreements if the agreement expressly addresses wage equality. However, even union agreements must comply with the substantive prohibition on gender-based pay discrimination, so this exception is narrow.

Positions covered by the federal Fair Labor Standards Act (FLSA) overtime provisions are covered by Massachusetts equal pay law, meaning exemptions from FLSA (such as the executive, administrative, or professional exemptions) do not exempt employees from equal pay protections. At-will employment status does not shield employers from equal pay obligations; an at-will employee has the same right to equal pay as any other employee.

Minor pay differences may be permissible if they result from factors genuinely unrelated to gender, such as legitimate differences in work quality, specific credentials, or specialized training. However, Massachusetts courts apply strict scrutiny to employer justifications, and the burden remains on the employer to prove the differential is not rooted in gender discrimination. Pay secrecy policies that prevent employees from discussing wages may violate Massachusetts wage theft law and related statutes, making it harder for employers to conceal unequal pay.

Step 1: Document the Unequal Pay. Keep detailed records of your job duties, responsibilities, skills required, and working conditions. Document your compensation (base salary, bonuses, commissions, benefits) and compare it to similarly situated employees of a different gender performing substantially similar work. Retain pay stubs, offer letters, job descriptions, performance reviews, and any communications about compensation. Take screenshots of internal compensation data if accessible. Create a timeline noting when you became aware of the pay disparity. This documentation is critical because you bear the burden of showing the jobs are substantially similar.

Step 2: Internal Complaint and Records Preservation. Before filing externally, consider filing an internal complaint with your employer's human resources department or your manager if HR is unavailable. Document the date, time, and content of your complaint in writing (email is acceptable). Request written acknowledgment of receipt. Preserve all related documents and communications going forward. Even if the internal complaint does not resolve the issue, it creates a record and may be relevant to proving the employer's knowledge of the disparity. However, do not delay external filing while pursuing internal remedies, as the statute of limitations continues to run.

Step 3: File with the Massachusetts Commission Against Discrimination (MCAD). The Massachusetts Commission Against Discrimination enforces the Equal Pay Act alongside the EEOC. You may file with MCAD, the EEOC, or both simultaneously. To file with MCAD, complete a complaint form available at www.mass.gov/mcad or call (617) 994-6000. You have three years from the date of the last unequal paycheck to file. Provide your name, address, contact information, employer name and address, description of the pay disparity, names of comparators (coworkers paid more), job titles, responsibilities, dates of employment, and specific dates and amounts of unequal pay. Include copies of supporting documents. There is no filing fee. MCAD will acknowledge receipt and may conduct a preliminary investigation.

Step 4: Investigation Process. After filing with MCAD, the agency will issue a complaint determination letter and may investigate. MCAD investigators will contact your employer for a written response and may request documents, payroll records, and job descriptions. You may be interviewed and asked to provide additional information. The investigation typically takes 4 to 12 months. If MCAD finds probable cause that discrimination occurred, it will attempt conciliation. If conciliation fails, the case proceeds to a public hearing before an MCAD administrative judge. At hearing, both sides present evidence and witnesses. The burden is on you (the charging party) to prove by a preponderance of the evidence that you and your comparator performed substantially similar work and were paid unequally because of gender. The employer may present evidence of legitimate, non-discriminatory reasons for the pay differential. An administrative judge will issue a decision within 30 days of hearing conclusion.

Step 5: Consult an Employment Attorney. Consider consulting an employment law attorney experienced in equal pay cases as soon as you become aware of potential pay discrimination. An attorney can help you evaluate the strength of your claim, identify appropriate comparators, gather evidence, and decide whether to pursue internal remedies, file with MCAD/EEOC, or file a civil lawsuit. Many attorneys work on contingency (no upfront fee), and Massachusetts law provides for attorney's fees to prevailing employees, making representation accessible. If MCAD's investigation stalls or the agency does not find probable cause, an attorney can help you file a civil action in Massachusetts state court or federal court within the applicable statute of limitations.