Age Discrimination in Employment Act (ADEA)

The Age Discrimination in Employment Act, or ADEA, is a US federal law that protects employees and job applicants age 40 and older from discrimination based on age in any aspect of employment.

The law covers hiring, firing, promotion, layoffs, compensation, and virtually every other employment decision, not just termination. The EEOC's fact sheet on age discrimination is the clearest single-page summary of what the law actually prohibits.

Who Is Covered by the ADEA?

The law applies to private employers with 20 or more employees, along with labor unions, employment agencies, and federal, state, and local governments.

Protection is one-directional in a specific sense: the ADEA protects workers 40 and older from being disadvantaged relative to younger workers, not the reverse. This distinguishes it from Title VII and the ADA, both of which the EEOC also enforces but which protect against discrimination in both directions along their respective characteristics.

What Does Age Discrimination Look Like in Practice?

Violations rarely take the form of an explicit statement about age. They usually show up as patterns or coded language that a court can still recognize as age-based.

• Job postings using language like "digital native" or "recent graduate" as a proxy for young candidates
• Layoffs that disproportionately target older, higher-tenure employees without a documented, neutral business justification
• Passing over qualified older candidates for promotion in favor of consistently younger ones
• Comments about someone being "a good culture fit" for a younger team, used as a proxy for age
• Excluding older workers from training or development opportunities based on assumed years remaining

How Does the ADEA Apply to Layoffs Specifically?

Reductions in force draw close ADEA scrutiny because they concentrate age-related risk in a single event. A layoff pattern that disproportionately affects employees over 40 needs a defensible, documented, age-neutral rationale.

The Older Workers Benefit Protection Act, an amendment to the ADEA, also sets specific requirements for waivers of ADEA claims obtained in exchange for severance, including required review periods and disclosures for group layoffs.

How Should HR Reduce ADEA Risk?

Most exposure comes from decisions that were never actually about age but weren't documented well enough to prove it. EEOC guidance on severance waivers covers the disclosure requirements that most often trip up otherwise well-documented layoffs.

• Base every hiring, promotion, and layoff decision on documented, age-neutral criteria
• Review layoff selection criteria for disparate impact on employees 40 and older before finalizing
• Train hiring managers to recognize age-coded language in job postings and interviews
• Apply performance standards and development opportunities consistently across age groups
• Have counsel review severance agreements involving ADEA waivers for required disclosures

Confirm current requirements through the EEOC, which enforces the ADEA alongside other federal anti-discrimination laws. HR Cloud's anti-discrimination policy template and disciplinary action policy help apply standards consistently across age groups.

Discover how our HR solutions streamline onboarding, boost employee engagement, and simplify HR management

Book Your Free Demo

Frequently Asked Questions

Q: What is the minimum age protected by the ADEA?

A: 40. The law does not protect younger workers from being treated less favorably than older workers, only the reverse.

Q: Does the ADEA apply to small businesses?

A: It applies to employers with 20 or more employees. Some states extend age discrimination protection to smaller employers under their own laws.

Q: Can a company have a mandatory retirement age?

A: Generally no, with narrow exceptions for specific roles such as certain executive positions or public safety jobs. Confirm any exception applies before relying on it.

Q: Is asking a candidate's age during an interview illegal?

A: It is not automatically illegal, but it is strongly discouraged, since it can be used as evidence of discriminatory intent if the candidate is not hired.

Q: How is the ADEA different from general age-related company policy?

A: The ADEA sets a legal floor for protection. Company policy can go further, such as a stated anti-ageism commitment, but cannot legally provide less protection than the ADEA requires.