Massachusetts prohibits employers from paying employees of one gender less than employees of another gender for comparable work. Comparable work means work requiring substantially similar skill, effort and responsibility and performed under similar working conditions. Pay differences are permitted only when based on one or more of six statutory reasons: a seniority system, merit system, a system measuring earnings by quantity or quality of production, sales or revenue, the geographic location of the job, education, training or experience reasonably related to the job, or regular and necessary travel. Salary history is not a defense to unequal pay liability, and Massachusetts separately restricts salary-history inquiries during hiring.
Jurisdiction: Massachusetts
Massachusetts Uses Comparable Work Rather Than Identical Jobs
The Massachusetts Equal Pay Act focuses on comparable work. The Attorney General explains that work is comparable when it requires substantially similar skill, effort and responsibility and is performed under similar working conditions. Job titles or descriptions alone do not resolve the issue. Employers should compare actual job content, including the expertise required, physical or mental effort, accountability and the conditions under which the work is performed. Roles can therefore be comparable even when departments or titles differ.
MEPA's Equal-Pay Protection Is Gender Based
MEPA prohibits gender-based wage discrimination for comparable work. Employers should distinguish that statutory scope from broader federal or state anti-discrimination laws that may protect additional characteristics. A Massachusetts compensation review may therefore need more than one legal lens. The MEPA analysis asks whether employees of different genders performing comparable work are paid differently and, if so, whether the difference falls within a specifically permitted statutory category.
Massachusetts Lists Six Permitted Reasons for Pay Differences
MEPA permits differences in pay for comparable work only when based on specified factors. Those are a seniority system; a merit system; a system measuring earnings by quantity or quality of production, sales or revenue; the geographic location where the job is performed; education, training or experience reasonably related to the job; or travel that is a regular and necessary condition of the job. Employers should map each material pay difference to one or more of these categories instead of relying on broad explanations such as market conditions or negotiation without testing whether the explanation fits the statute.
Salary History Does Not Explain Away a Comparable-Work Gap
Massachusetts Attorney General guidance states that employees' salary histories are not relevant or a defense to employer liability under MEPA. The state also separately limits salary-history inquiries during hiring before an employer makes an offer of employment that includes compensation, subject to the law's details. Employers should therefore set starting pay from the role and lawful compensation factors rather than using prior salary as the reason two comparable workers receive different pay.
The Permitted Factor Should Be Connected to the Actual Difference
Documenting that an employee has more education or experience is not enough if that factor did not actually influence the compensation decision or is unrelated to the job. Employers should record which factor affected the salary, how it was measured and how much of the difference it explains. Similar documentation is useful for geographic differentials, merit systems and production-based pay. A consistent system is easier to audit than a series of discretionary explanations created after the fact.
A Massachusetts Pay-Equity Review Should Use the State Test
A useful review first identifies groups performing comparable work, then compares compensation and tests identified differences against the six statutory categories. Employers may also examine whether job architecture, salary ranges or manager discretion create recurring gaps. Massachusetts law has specific provisions concerning good-faith self-evaluations, but employers considering those protections should review the statutory requirements and legal guidance carefully rather than assuming that every compensation analysis qualifies. The operational goal is to make current pay decisions traceable to lawful, documented factors.
Frequently Asked Questions
What is comparable work under Massachusetts law?
It is work requiring substantially similar skill, effort and responsibility and performed under similar working conditions.
Can location justify different pay in Massachusetts?
Yes. Geographic location where a job is performed is one of the six statutory bases that can support a pay difference for comparable work.
Can prior salary justify a Massachusetts equal-pay difference?
Massachusetts Attorney General guidance states that salary history is not relevant or a defense to MEPA liability.
Related Guides
Official Sources
Requirements and practices differ by jurisdiction and organisation. Check current local law, official guidance and professional advice for a specific situation.