Age Discrimination in Employment Act (ADEA) (US)
A federal law enacted in 1967 that prohibits employment discrimination against individuals aged 40 and older in hiring, firing, promotions, compensation, and other terms and conditions of employment, enforced by the EEOC.
- What Is the Age Discrimination in Employment Act (ADEA)?
- Who Does the ADEA Cover?
- What Practices Does the ADEA Prohibit?
- Disparate Treatment vs. Disparate Impact Under the ADEA
- ADEA Waivers in Severance Agreements (OWBPA Requirements)
- How to File an ADEA Complaint
- Notable ADEA Cases and Settlements
- ADEA Compliance Strategies for HR Teams
- Age Discrimination Statistics [2026]
- Frequently Asked Questions About the ADEA
What Is the Age Discrimination in Employment Act (ADEA)?
Key Takeaways
- ✓The ADEA protects workers aged 40 and older from discrimination in every aspect of employment: hiring, firing, pay, job assignments, promotions, layoffs, training, benefits, and any other term or condition of work.
- ✓It applies to private employers with 20 or more employees, federal, state, and local governments, employment agencies, and labor organizations with 25+ members.
- ✓The law doesn't protect workers under 40, and it doesn't prohibit favoring an older worker over a younger one when both are 40 or older.
- ✓In 2023, the EEOC received 12,965 age discrimination charges, making it the fourth most common type of workplace discrimination claim after retaliation, disability, and race.
- ✓The Supreme Court's 2009 decision in Gross v. FBL Financial Services raised the burden of proof for ADEA plaintiffs, requiring them to show age was the "but-for" cause of the adverse action, not just a motivating factor.
Congress passed the ADEA in 1967 to address widespread age-based hiring practices. Job ads at the time routinely included phrases like "age 25 to 35" or "young and energetic." A 1965 Department of Labor report found that more than half of private-sector employers used maximum age limits in hiring, effectively shutting out workers over 45 from most jobs. The ADEA changed that. It made it illegal to use age as a factor in employment decisions for anyone 40 or older. Unlike Title VII of the Civil Rights Act, which covers multiple protected classes, the ADEA focuses exclusively on age. The Older Workers Benefit Protection Act (OWBPA) of 1990 amended the ADEA to specifically prohibit age discrimination in employee benefits and to set strict rules for age-related waivers in severance agreements. Today, age discrimination remains one of the most underreported forms of workplace bias. AARP research shows that 78% of older workers have seen or experienced age discrimination, but many don't file complaints because the behavior is often subtle: being excluded from meetings, losing assignments to younger colleagues, or hearing comments about "fresh perspectives" and "digital natives."
Who Does the ADEA Cover?
The ADEA's coverage is broad but has important limits that HR teams need to understand.
Protected individuals
Any employee or job applicant aged 40 or older is protected. There's no upper age limit. A 75-year-old worker has the same protections as a 42-year-old. The law protects against discrimination between members of the protected class too, but with a wrinkle. An employer can't fire a 60-year-old and replace them with a 40-year-old based on age. However, the Supreme Court ruled in O'Connor v. Consolidated Coin Caterers (1996) that an ADEA plaintiff doesn't need to show they were replaced by someone under 40, just that age was the reason for the adverse action.
Covered employers
Private employers with 20 or more employees for each working day in 20 or more calendar weeks in the current or preceding year. Federal government employees (covered under Section 633a with separate procedures). State and local governments. Employment agencies that serve covered employers. Labor organizations with 25 or more members. The 20-employee threshold is lower than some state laws. California's FEHA, for example, covers employers with just 5 employees for age discrimination claims.
Exemptions
The ADEA allows age-based decisions in limited circumstances. Bona fide occupational qualifications (BFOQ) permit age limits for positions where age is essential to the job's core function: airline pilots (mandatory retirement at 65 per FAA rules), law enforcement officers, and firefighters in some jurisdictions. Elected officials and their personal staff are exempt. High-level executives and policymakers earning annual retirement benefits of $44,000+ can face mandatory retirement at 65. Tenured university faculty lost their mandatory retirement exemption in 1994.
What Practices Does the ADEA Prohibit?
The ADEA reaches every stage of the employment lifecycle, from job postings through termination.
Hiring and recruitment
Job postings can't include age preferences or limitations. Phrases like "recent college graduate," "1-3 years of experience," "digital native," or "young and energetic" may indicate age bias. The EEOC has pursued cases against companies whose targeted social media job ads excluded older users. In 2019, the EEOC settled cases with several major employers who used Facebook's ad targeting to exclude users over certain ages from seeing job advertisements. Asking a candidate's age, graduation year, or date of birth during interviews is risky. While not explicitly illegal, it creates evidence of age awareness before a hiring decision.
Compensation and benefits
Employers can't reduce wages or benefits based on age. The OWBPA added specific protections: employers must spend the same amount per employee on benefits regardless of age, or provide equal benefits. Since health insurance costs more for older workers, some employers provide lower coverage levels if they can prove equal per-employee spending (the "equal cost" defense). Pension plans can't exclude older workers. Early retirement incentive programs are allowed but must be truly voluntary, with no coercion or reduced benefits for those who decline.
Termination and layoffs
Firing or laying off employees because of their age violates the ADEA. This includes constructive discharge, where conditions are made so intolerable that the employee feels forced to quit. During reductions in force (RIFs), employers must analyze layoff decisions for disparate impact on workers 40+. If a RIF disproportionately affects older workers, the employer needs a legitimate, non-discriminatory reason. Performance-based terminations are allowed, but the documentation must be solid. Firing a 55-year-old for "poor performance" looks suspicious if their last three reviews were satisfactory.
Harassment
Age-based harassment is unlawful when it creates a hostile work environment. Isolated "old timer" jokes don't usually meet the threshold, but persistent comments, age-based nicknames, exclusion from team activities, or repeated references to retirement can constitute harassment. Supervisors calling experienced employees "dinosaurs" or "out of touch," combined with tangible employment consequences, can support an ADEA claim.
Disparate Treatment vs. Disparate Impact Under the ADEA
The ADEA recognizes two theories of discrimination, but they work differently than under Title VII.
Disparate treatment
Intentional age discrimination. An employer deliberately treats an older worker less favorably because of age. The 2009 Gross v. FBL Financial Services decision made these cases harder. Under Title VII, a plaintiff only needs to show the protected characteristic was "a motivating factor." Under the ADEA, the plaintiff must prove age was the "but-for" cause, meaning the adverse action wouldn't have happened if the employee were younger. This higher standard means plaintiffs need stronger direct evidence: age-related comments by decision-makers, patterns of replacing older workers with younger ones, or internal communications revealing age bias.
Disparate impact
Facially neutral policies that disproportionately affect older workers. The Supreme Court confirmed in Smith v. City of Jackson (2005) that disparate impact claims are available under the ADEA, but with a significant limitation. Employers can defend by showing the policy is based on a "reasonable factor other than age" (RFOA), a lower bar than the "business necessity" defense required under Title VII. For example, a policy requiring all IT staff to pass a cloud computing certification could disproportionately affect older workers, but if the employer can show the certification is reasonably related to job duties, the RFOA defense applies.
ADEA Waivers in Severance Agreements (OWBPA Requirements)
When employers offer severance packages that include a waiver of ADEA claims, the Older Workers Benefit Protection Act imposes strict requirements. A waiver that doesn't meet every requirement is unenforceable.
Individual separation agreements
The waiver must be written in plain language understandable to the employee. It must specifically refer to rights or claims arising under the ADEA. It can't waive rights or claims that arise after the agreement is signed. The employee must receive something of value beyond what they're already entitled to. The employee must be advised in writing to consult an attorney. The employee must be given 21 days to consider the agreement. The employee has 7 days after signing to revoke the agreement. All seven requirements must be met. Missing even one makes the waiver void.
Group layoff or exit incentive programs
When two or more employees are affected, additional requirements apply. The consideration period extends from 21 to 45 days. The employer must provide written disclosure of the job titles and ages of all individuals in the decisional unit who are eligible for and selected for the program, as well as those not selected. This lets affected employees assess whether the layoff pattern suggests age discrimination. The 7-day revocation period still applies. In EEOC v. Allstate Insurance (2004), the court invalidated waivers covering 6,500 employee-agents because Allstate didn't meet OWBPA disclosure requirements.
How to File an ADEA Complaint
Employees who believe they've experienced age discrimination have specific deadlines and procedures to follow.
EEOC charge filing
An employee must file a charge of discrimination with the EEOC before suing in federal court. The deadline is 180 days from the discriminatory act in states without a state anti-discrimination agency, or 300 days in states with one (which includes most states). Federal employees have a different process: they must contact their agency's EEO counselor within 45 days. The EEOC investigates the charge, attempts conciliation, and either files suit itself or issues a "right to sue" letter allowing the employee to proceed in court.
Litigation
After receiving a right-to-sue letter, the employee has 90 days to file a lawsuit in federal court. Available remedies include back pay, front pay (future lost earnings), reinstatement, liquidated damages equal to back pay (for willful violations), and attorney's fees. Unlike Title VII, the ADEA doesn't provide for compensatory damages (pain and suffering) or punitive damages. However, many state age discrimination laws do allow these damages, which is why plaintiffs often file dual federal/state claims.
Notable ADEA Cases and Settlements
Court decisions and EEOC settlements show how the ADEA applies in practice.
| Case/Settlement | Year | Issue | Outcome |
|---|---|---|---|
| Gross v. FBL Financial Services (Supreme Court) | 2009 | Burden of proof standard for ADEA claims | Established "but-for" causation standard, making age discrimination harder to prove than Title VII claims |
| EEOC v. Texas Roadhouse | 2017 | Systemic age discrimination in hiring | $12 million settlement for refusing to hire older applicants for front-of-house positions |
| Villarreal v. R.J. Reynolds | 2016 | Age-targeted online recruiting | Court found that using age-targeted digital ads and resume filters constituted disparate impact |
| Babb v. Wilkie (Supreme Court) | 2020 | Federal employee ADEA standard | Held that federal employees can prove age discrimination with a lower "motivating factor" standard than private-sector workers |
| EEOC v. Global Horizons | 2014 | Age-based hiring policies | $2.3 million for excluding older farmworkers from employment opportunities |
ADEA Compliance Strategies for HR Teams
Preventing age discrimination claims requires proactive policies and consistent documentation across the organization.
- Audit job postings for age-coded language. Remove terms like "digital native," "high-energy," "recent graduate," or maximum experience limits. Use job analysis to define qualifications based on skills, not proxies for age.
- Train hiring managers on age-neutral interviewing. Don't ask graduation dates, career timeline questions, or retirement plans. Focus questions on skills, experience with specific tools, and ability to perform essential job functions.
- Document performance issues in real time, not retrospectively. If you're building a case for termination of a 50-year-old employee, the documentation trail needs to start months before the decision, not the week before.
- Analyze RIF selections for age impact before finalizing. Run statistical comparisons of the affected group versus the retained group by age. If workers 40+ are disproportionately affected, reevaluate the selection criteria.
- Review compensation data annually for age-based pay gaps. Ensure older workers aren't systematically paid less than younger workers in the same roles with comparable performance.
- Ensure OWBPA compliance for every severance agreement offered to a worker 40+. Use a checklist covering all seven requirements. Have employment counsel review templates annually.
Age Discrimination Statistics [2026]
Data reflecting the scope and impact of age-based workplace discrimination in the United States.
Frequently Asked Questions
Does the ADEA protect workers under 40?
Can an employer ask my age during an interview?
Is mandatory retirement legal under the ADEA?
What's the difference between ADEA and state age discrimination laws?
Can I be fired for poor performance if I'm over 40?
Does the ADEA apply to job advertisements?
Written by Adithyan RK