Glossary term

Age Discrimination in Employment Act (ADEA)

The Age Discrimination in Employment Act is a federal law that generally prohibits employment discrimination against workers age 40 or older.

Updated

May 19, 2026

Read time

2 min read

What Is the Age Discrimination in Employment Act?

The Age Discrimination in Employment Act, or ADEA, is a federal law that generally prohibits employment discrimination against workers age 40 or older. It applies to many employment decisions, including hiring, firing, promotion, compensation, benefits, training, layoffs, and job assignments.

The law matters financially because age discrimination can affect earnings, career duration, retirement timing, health benefits, severance, and the ability to recover from job loss later in life.

Key Takeaways

  • The ADEA protects many workers age 40 or older from age-based employment discrimination.
  • It can apply to hiring, firing, pay, benefits, promotions, layoffs, and other job decisions.
  • The law is enforced by the Equal Employment Opportunity Commission.
  • It does not protect younger workers from age discrimination under the federal ADEA.

Where the ADEA Can Apply

Employment Area

Possible Age-Related Issue

Financial Consequence

Hiring

Rejecting older applicants because of age assumptions

Lost wages and fewer job options

Promotion

Passing over older employees for advancement

Lower career earnings

Layoffs

Targeting older workers for reduction in force

Job loss near retirement age

Benefits

Age-based benefit treatment that violates rules

Reduced compensation package

Training

Excluding older workers from development opportunities

Lower future mobility

Employment and Retirement Context

Age discrimination can be especially damaging because older workers may have fewer years to rebuild savings after job loss. A forced job change can affect retirement contributions, health insurance, pension accruals, stock compensation, severance negotiations, and Social Security timing.

The ADEA does not guarantee job security or prohibit every business decision that affects older workers. Employers can make decisions based on performance, restructuring, qualifications, or other lawful reasons. The issue is whether age is used unlawfully.

Waivers and Severance

ADEA rights can arise in severance agreements and releases. Special rules may apply when an employer asks an older worker to waive age discrimination claims, including requirements intended to make the waiver knowing and voluntary.

Workers reviewing severance documents should understand that age-discrimination releases can have legal and financial consequences. The glossary explanation is educational, not legal advice.

The Bottom Line

The ADEA is a federal employment law protecting many workers age 40 or older from age-based discrimination. It matters because employment decisions late in a career can have outsized effects on income, benefits, savings, and retirement security.

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