This article is for informational and educational use only. It does not provide legal, financial, or tax advice and does not form an attorney-client relationship. Legal requirements can differ by jurisdiction and may change without notice. A qualified professional can address specific facts and current rules.
Key Facts
- Federal level: The core federal equal pay statute is 29 U.S.C. § 206(d), part of the Fair Labor Standards Act, which addresses sex-based wage differences for equal work in the same establishment under similar working conditions.
- Federal level: The Equal Pay Act lists four statutory defenses: a seniority system, a merit system, a system measuring earnings by quantity or quality of production, or a differential based on any factor other than sex.
- Federal level: Federal law does not allow compliance with the Equal Pay Act by lowering another employee’s wage rate.
- National overview: Title VII and the Equal Pay Act are related but not identical because Title VII addresses compensation discrimination more broadly, while the Equal Pay Act is a specific sex-based pay rule.
- State level: California uses a broader substantially similar work standard in its equal pay law and also reaches race- and ethnicity-based pay differences.
- State level: California states that Labor Code section 432.3 prohibits salary history inquiries and that employers with 15 or more employees must include the pay scale in job postings.
- State level: New York states that its pay equity law covers substantially similar work and that its salary history inquiry ban took effect on January 6, 2020.
- State level: New York State’s pay transparency page describes coverage for certain private sector employers with four or more employees and notes that New York City rules may also apply.
- State level: Massachusetts has its own updated equal pay law, which Mass.gov says took effect on July 1, 2018.
Last reviewed: May 2026. Legal rules, forms, deadlines, and procedures can change by jurisdiction, agency, and court system.
- Equal pay is a broad workplace idea, but the legal rules are more specific
- The Equal Pay Act is the starting point for federal equal pay law
- The Equal Pay Act has four statutory defenses
- Title VII is related to equal pay, but it is not the same law
- Federal law and state law do not use identical pay equity standards
- State pay transparency and salary history rules add another layer
- A quick comparison helps separate the main rules
- Why the old negotiation theme does not answer the legal question by itself
- The central takeaway is about legal categories, not slogans
- Sources
Equal pay is a broad workplace idea, but the legal rules are more specific
People often use equal pay as a general phrase for fairness in compensation. In legal information, the phrase can point to different rules depending on the claim and the jurisdiction. At the federal level, the main statute is the Equal Pay Act in 29 U.S.C. § 206(d). Federal compensation discrimination law also includes Title VII, and some states use broader standards than the federal baseline.
That distinction matters because a workplace discussion about pay fairness is not automatically the same thing as a legal claim under one specific statute.
The Equal Pay Act is the starting point for federal equal pay law
The Equal Pay Act is codified in 29 U.S.C. § 206(d). According to the statute, an employer may not discriminate on the basis of sex by paying lower wages for equal work on jobs requiring equal skill, effort, and responsibility when the jobs are performed under similar working conditions within the same establishment.
The U.S. Department of Labor Equal Pay Act page also explains that the law is part of the Fair Labor Standards Act and is administered and enforced by the EEOC.
This federal rule is narrower than many casual uses of the phrase equal pay. It is a sex-based rule, and its text uses the federal terms equal work, same establishment, and similar working conditions.
The Equal Pay Act has four statutory defenses
The statute does not treat every pay difference as unlawful. Under 29 U.S.C. § 206(d), a wage difference may be lawful if it is based on one of four recognized defenses:
- a seniority system
- a merit system
- a system measuring earnings by quantity or quality of production
- a differential based on any factor other than sex
The statute also says an employer cannot comply with the law by cutting another employee’s pay. That point is often overlooked in public discussions of pay equity.
Title VII is related to equal pay, but it is not the same law
42 U.S.C. § 2000e-2 makes it unlawful for an employer to discriminate with respect to compensation because of race, color, religion, sex, or national origin. That means federal pay discrimination law is broader than the Equal Pay Act alone.
At the same time, Title VII and the Equal Pay Act are not interchangeable. Title VII expressly cross-references pay differences authorized by 29 U.S.C. § 206(d). In plain English, federal law contains a specific sex-based equal pay rule and a broader antidiscrimination framework that also reaches compensation.
The EEOC’s equal pay and compensation discrimination overview supports that broader framing, while the statute text and Department of Labor materials provide the main legal detail used here.
Federal law and state law do not use identical pay equity standards
A major source of confusion is terminology. Federal law under the Equal Pay Act uses the language of equal work in the same establishment. Some states use different and broader wording.
California is a clear example. The California Equal Pay Act says the law covers pay differences for substantially similar work and extends beyond sex to certain race- and ethnicity-based pay differences. California also states that it eliminated the same-establishment requirement that appears in the federal statute.
New York provides another example. The New York salary history and pay equity page says the state’s pay equity law, effective October 8, 2019, expanded equal pay for equal work to cover substantially similar work.
This varies by state.
State pay transparency and salary history rules add another layer
Modern equal pay discussions often include rules that are not part of the federal Equal Pay Act at all. Two important examples are salary history bans and pay transparency laws.
California states that Labor Code section 432.3 prohibits salary history inquiries and that, as of January 1, 2023, employers with 15 or more employees must include the pay scale in job postings. New York State’s pay transparency page says certain private sector employers with four or more employees must include a range of pay in advertised job, promotion, or transfer opportunities.
New York’s official materials also note overlap between state and local law. Its pay transparency page states that opportunities performed in New York City may also be covered by New York City’s pay transparency law. That is a useful reminder that local rules can matter alongside state rules.
This varies by state.
A quick comparison helps separate the main rules
| Rule or concept | Jurisdiction | What the sourced rule covers |
|---|---|---|
| Equal Pay Act, 29 U.S.C. § 206(d) | Federal | Sex-based wage disparities for equal work in the same establishment under similar working conditions |
| Title VII compensation discrimination | Federal | Broader compensation discrimination based on race, color, religion, sex, or national origin |
| California Equal Pay Act | California | Broader substantially similar work standard and coverage that also reaches race and ethnicity |
| Salary history and pay scale posting rules | California | State rules on salary history inquiries and pay scale disclosures in job postings |
| Pay transparency law | New York | State rule requiring a pay range in certain advertised jobs, promotions, or transfers |
| Updated equal pay law | Massachusetts | Separate state equal pay framework effective July 1, 2018 |
The table shows why a simple headline about equal pay can hide multiple legal systems working at once.
Why the old negotiation theme does not answer the legal question by itself
The legacy headline behind this page focused on negotiating pay and being willing to describe one’s value. That may explain why people often connect compensation conversations with equal pay law. But current legal information turns on source-controlled rules, not on negotiation advice.
Whether a pay issue fits the Equal Pay Act, Title VII, a state pay equity law, a salary history ban, or a pay transparency rule depends on the governing law. Federal and state rules overlap in some workplaces, but they do not say exactly the same thing.
For readers following archived legal news topics, the main update is that modern pay equity discussions often include state transparency and salary history laws that were not part of the original 2013 framing. A separate archived article on legal support for workers facing serious illness also reflects how workplace rights issues can arise in a broader legal context.
The central takeaway is about legal categories, not slogans
Equal pay is a useful public phrase, but the legal information behind it is more exact. The federal Equal Pay Act is a specific sex-based statute with defined defenses and a same-establishment framework. Title VII separately addresses compensation discrimination across a broader set of protected categories. Some states, including California and New York, use broader pay equity language such as substantially similar work, and some states also regulate salary history questions and pay range disclosures.
That is why current official sources matter so much in this area. The phrase stays the same, but the controlling law may be federal, state, or both.
