Employment discrimination and retaliation under U.S. federal law

Federal law prohibits employers from making employment decisions because of protected characteristics, and from punishing employees for complaining about discrimination. This guide explains what the main laws cover, how claims are evaluated, and the agency process that comes before most lawsuits.

Jurisdiction
United States (federal), with state variations
Topic
Employment
Last updated
Oct 8, 2026
Editorial status
Not yet reviewed by a licensed attorney

General legal information, published for everyone. It does not apply the law to anyone’s particular situation and is not legal advice. Laws change and differ by place; check the primary sources below.

Quick summary

  • Title VII, the ADEA, the ADA, and other federal laws prohibit discrimination in hiring, firing, pay, and other terms of employment.
  • Retaliation for opposing discrimination or taking part in an investigation is a separate violation, and the most common charge filed with the EEOC.
  • Most federal discrimination claims require filing a charge with the EEOC first, within 180 or 300 days.
  • Many state and local laws cover smaller employers and more characteristics than federal law.

What it means

Discrimination means treating someone worse in employment because of a protected characteristic, or using a policy that unjustifiably disadvantages a protected group. Retaliation means taking a materially adverse action against someone because they engaged in protected activity, such as complaining about discrimination, filing a charge, or serving as a witness.

Retaliation can be unlawful even if the underlying complaint of discrimination is not proven, as long as the complaint was protected activity.

Key terms

Disparate treatment
Intentionally treating a person differently because of a protected characteristic.
Disparate impact
A neutral policy that disproportionately disadvantages a protected group and is not justified by business necessity.
Hostile work environment
Harassment based on a protected characteristic that is severe or pervasive enough to alter the conditions of employment.
Protected activity
Opposing practices the law makes unlawful, or participating in a charge, investigation, or proceeding under those laws.
Materially adverse action
For retaliation claims, an action that might dissuade a reasonable worker from making or supporting a discrimination charge.
EEOC charge
The formal complaint filed with the U.S. Equal Employment Opportunity Commission, usually required before a federal lawsuit.
Right-to-sue notice
An EEOC notice that allows a charging party to file a lawsuit, which generally must be filed within 90 days of receipt.

How the law works

The main federal laws

  • Title VII of the Civil Rights Act of 1964 — race, color, religion, sex (including pregnancy, sexual orientation, and gender identity), and national origin; employers with 15 or more employees.
  • Age Discrimination in Employment Act (ADEA) — age 40 and older; employers with 20 or more employees.
  • Americans with Disabilities Act (ADA), Title I — disability, including the duty to provide reasonable accommodation; employers with 15 or more employees.
  • Equal Pay Act — unequal pay for substantially equal work based on sex; applies regardless of employer size under the FLSA's coverage.
  • Pregnant Workers Fairness Act — reasonable accommodation for known limitations related to pregnancy and childbirth; employers with 15 or more employees.

The Supreme Court held in Bostock v. Clayton County (2020) that firing someone for being gay or transgender is discrimination "because of sex" under Title VII.

How discrimination claims are proved

Direct evidence of discriminatory intent is rare, so courts often use the burden-shifting framework from McDonnell Douglas Corp. v. Green (1973): the employee shows a basic (prima facie) case, the employer gives a legitimate non-discriminatory reason, and the employee then tries to show that reason is a pretext. Evidence commonly considered includes how comparable employees were treated, statements by decision-makers, timing, and departures from the employer's usual procedures. In Muldrow v. City of St. Louis (2024), the Supreme Court held that an employee challenging a discriminatory transfer must show some harm to a term or condition of employment, not significant harm.

How retaliation claims are proved

A retaliation claim generally requires (1) protected activity, (2) a materially adverse action, and (3) a causal connection. Burlington Northern & Santa Fe Railway Co. v. White (2006) defined a materially adverse action as one that might dissuade a reasonable worker from making or supporting a charge of discrimination, which can include actions outside the workplace. For Title VII retaliation, University of Texas Southwestern Medical Center v. Nassar (2013) requires "but-for" causation: the adverse action would not have happened without the protected activity.

The EEOC process and time limits

For Title VII, the ADEA, and the ADA, a charge generally must be filed with the EEOC within 180 days of the discriminatory act, extended to 300 days where a state or local agency enforces a law prohibiting the same discrimination (42 U.S.C. § 2000e-5(e)(1)). The EEOC may investigate, offer mediation, or issue a right-to-sue notice; a federal lawsuit generally must then be filed within 90 days. Equal Pay Act claims can go directly to court within two years (three for willful violations). Federal-sector employees follow a different process with shorter initial deadlines. Because these periods can depend on facts and on which law applies, confirm the applicable deadline with the EEOC or a licensed attorney before relying on it.

Remedies

Remedies can include back pay, reinstatement or front pay, and, for intentional discrimination under Title VII and the ADA, compensatory and punitive damages subject to caps based on employer size (42 U.S.C. § 1981a(b)(3)), plus attorney's fees. Punitive damages are not available against government employers.

Examples

Hypothetical example

A complaint followed by a schedule change

An employee reports to HR that a supervisor makes comments about her national origin. Two weeks later, the supervisor moves her to an undesirable night shift. A schedule change that might dissuade a reasonable worker from complaining can be a materially adverse action; whether it was retaliation would turn on causation and the employer's explanation.

Hypothetical example

A neutral rule with uneven effects

A warehouse requires all applicants to lift 100 pounds, although the job rarely requires it. If the requirement screens out women at a much higher rate and is not job-related and consistent with business necessity, it may be challenged as disparate impact.

Common questions

What if the employer has fewer than 15 employees?

Federal Title VII and the ADA would not apply, but many state and local anti-discrimination laws cover smaller employers. The Equal Pay Act and some other laws use different coverage rules.

Can a person be retaliated against for complaining even if they were wrong about discrimination?

Opposition is generally protected if the employee reasonably and in good faith believed the conduct was unlawful, even if it turns out not to be.

Is it necessary to go to the EEOC before suing?

For Title VII, ADA, and most ADEA claims, yes: filing a timely charge is generally a prerequisite. Equal Pay Act claims and some state-law claims do not require it.

Does a state agency charge count?

In many states, the EEOC and the state fair employment practices agency have work-sharing agreements, so a charge filed with one is treated as filed with both. Agency websites explain the arrangement for each state.

Important distinctions

Discrimination vs. retaliation

Discrimination is about a protected characteristic; retaliation is about protected activity. A person can have a retaliation claim without a discrimination claim, and vice versa.

Harassment vs. general workplace conflict

Anti-discrimination laws are not a general civility code. Harassment is unlawful when it is based on a protected characteristic and is severe or pervasive, or when it results in a tangible employment action.

Primary sources

  • Statute42 U.S.C. § 2000e-2Title VII — unlawful employment practicesUnited States (federal)
  • Statute42 U.S.C. § 2000e-3(a)Title VII — retaliationUnited States (federal)
  • Statute42 U.S.C. § 2000e-5Title VII — enforcement provisions and time limitsUnited States (federal)
  • Statute42 U.S.C. § 1981aDamages in cases of intentional discriminationUnited States (federal)
  • Statute29 U.S.C. § 623ADEA — prohibited practicesUnited States (federal)
  • Statute42 U.S.C. § 12112ADA — discrimination in employmentUnited States (federal)
  • Statute29 U.S.C. § 206(d)Equal Pay ActUnited States (federal)
  • Statute42 U.S.C. § 2000gg-1Pregnant Workers Fairness ActUnited States (federal)
  • CaseMcDonnell Douglas Corp. v. Green, 411 U.S. 792 (1973)United States (federal)Burden-shifting framework for circumstantial discrimination claims.
  • CaseBurlington Northern & Santa Fe Railway Co. v. White, 548 U.S. 53 (2006)United States (federal)Standard for a materially adverse action in retaliation claims.
  • CaseUniversity of Texas Southwestern Medical Center v. Nassar, 570 U.S. 338 (2013)United States (federal)But-for causation for Title VII retaliation.
  • CaseBostock v. Clayton County, 590 U.S. 644 (2020)United States (federal)Sexual orientation and gender identity discrimination is sex discrimination under Title VII.
  • CaseMuldrow v. City of St. Louis, 601 U.S. 346 (2024)United States (federal)A discriminatory transfer requires some harm to a term or condition of employment.
  • Agency guidanceEEOC — Time limits for filing a chargeUnited States (federal)
  • Agency guidanceEEOC — RetaliationUnited States (federal)

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Last updated
Oct 8, 2026
Jurisdiction
United States (federal), with state variations
Written by
House Legal editorial (AI-assisted)