29 USC 623: Age Discrimination, Employer Defenses, and Remedies

29 USC 623 is the core provision of the Age Discrimination in Employment Act. It makes it illegal for covered employers, employment agencies, and labor unions to treat workers age 40 or older worse because of their age in hiring, firing, pay, promotions, job assignments, or any other term or condition of employment.¹² The law reaches private employers with 20 or more employees, as well as state and local governments, and it gives workers a path to sue for back pay, reinstatement, and, in willful cases, double damages.

What Conduct the Statute Bans

The statute targets three actors: employers, employment agencies, and labor organizations. Employers cannot refuse to hire, fire, or worsen anyone’s pay, benefits, or working conditions because of age. They cannot sort or classify workers in ways that limit opportunities based on age, and they cannot cut anyone’s wages to comply with the ADEA.¹

Employment agencies cannot refuse referrals or steer applicants based on age. Unions face parallel restrictions: they cannot deny membership, expel members, or limit job referrals because of age, and they cannot pressure an employer to discriminate.¹

Facially neutral policies can also violate the law when they disproportionately harm older workers. In Smith v. City of Jackson (2005), the Supreme Court recognized disparate-impact claims under the ADEA, though it noted the theory is narrower than under Title VII because employers can defend a neutral policy by showing it was based on reasonable factors other than age.³

Who the Law Protects and Who It Covers

Protection starts at age 40. Workers under 40 have no federal age discrimination claim, and the Supreme Court confirmed in General Dynamics Land Systems, Inc. v. Cline (2004) that the statute protects older workers from being disadvantaged relative to younger ones, not the reverse. An employer that favors a 60-year-old over a 45-year-old does not violate the ADEA.⁴

On the employer side, coverage applies to private businesses with 20 or more employees working each day during at least 20 calendar weeks in the current or previous year. State and local governments and their agencies are covered too, though elected officials and their personal staff are exempt. Labor organizations with 25 or more members that operate in an industry affecting commerce are covered if they meet additional criteria such as being a certified bargaining representative or a chartered local. Employment agencies that regularly refer workers to covered employers fall under the statute with no minimum size requirement.⁵

If your employer has fewer than 20 workers, or you’re under 40, federal law leaves you out. State laws often fill both gaps, with lower employee thresholds and broader age coverage.

Job Postings and Coded Language

Section 623(e) forbids employers, agencies, and unions from printing or publishing any job notice or advertisement showing an age-based preference or limitation.¹ The EEOC has warned that phrases like “recent college graduate” can discourage applicants over 40 and may violate the law.⁶ Terms like “digital native,” “young and energetic,” or hard caps on years of experience raise similar concerns. If a listing uses this kind of language and you’re later passed over, the wording itself can serve as evidence of discriminatory intent.

How You Prove Age Discrimination

The proof standard under the ADEA is stricter than under Title VII. In Gross v. FBL Financial Services, Inc. (2009), the Supreme Court held that an ADEA plaintiff must prove age was the “but-for” cause of the employer’s adverse action. You need to show the employer would not have made the same decision if age were taken out of the equation.⁷

That’s a higher bar than the “motivating factor” standard used in race and sex discrimination cases. Even if age plainly influenced the decision, you lose if the employer can show it would have reached the same result anyway. The burden of persuasion stays on you throughout the case.⁷

Direct evidence is rare. An email saying “we need younger blood in this department” would qualify, but most cases turn on circumstantial evidence. Common patterns include a qualified older worker being passed over for a younger, less experienced hire; performance evaluations sliding after years of positive reviews; or a layoff falling disproportionately on workers over 50 while younger employees in similar roles are kept. Any one fact rarely proves a case. Together they can persuade a jury.

What Defenses Employers Raise

Bona Fide Occupational Qualification

Section 623(f) allows an employer to use age as a job criterion when age is a genuine job requirement, called a bona fide occupational qualification, or BFOQ. Courts read this defense narrowly. In Western Air Lines, Inc. v. Criswell (1985), the Supreme Court set a two-part test: the employer must show the age requirement is reasonably necessary for public safety or the essence of the business, and that individual evaluation of older workers was impractical.⁸ The defense works in genuinely safety-critical roles. Employers who try to stretch it beyond that usually lose.

Reasonable Factors Other Than Age

The more common defense, especially in disparate-impact cases, is “reasonable factors other than age,” or RFOA. It lets an employer justify a neutral policy or business decision by showing it was driven by non-age considerations such as budget constraints, restructuring, or skills-based criteria.¹

The employer carries the full burden. In Meacham v. Knolls Atomic Power Laboratory (2008), the Supreme Court held that an employer must actually prove the challenged practice was based on reasonable non-age factors, not merely assert it. The employer there used subjective criteria during a layoff and couldn’t show the process was designed to avoid disproportionately harming older workers.⁹ Objective performance data and documented conduct issues generally hold up; vague evaluations that appear only when a layoff is coming invite closer scrutiny.

Retaliation Is Separately Illegal

Section 623(d) makes it unlawful to retaliate against anyone who opposes age discrimination, files a charge, or participates in an ADEA investigation or lawsuit.¹ Retaliation can look like termination, demotion, a pay cut, reassignment to worse shifts, or exclusion from projects. Courts ask whether the employer’s action would discourage a reasonable worker from speaking up.

A retaliation claim can succeed even when the underlying discrimination claim fails. If you had an honest, good-faith belief the employer was violating the ADEA when you complained, the protection applies whether or not you can prove the original discrimination. You need to show a protected activity, a negative employment action, and a connection between them. Timing is often the strongest evidence. Being fired two weeks after filing a charge is hard for an employer to explain.

Filing a Charge With the EEOC

Before you can sue, you must file a charge with the Equal Employment Opportunity Commission. The deadline is 180 calendar days from the date of the discriminatory act. If your state has its own age discrimination agency, the deadline extends to 300 days.¹⁰ Miss the deadline and your claim is usually dead, so file promptly rather than perfectly.

After you file, the EEOC notifies the employer and investigates. If it finds insufficient evidence, it issues a Dismissal and Notice of Rights, and you have 90 days to sue on your own. If it finds reasonable cause, it first tries conciliation. Most ADEA cases end up as private lawsuits.

One quirk of ADEA procedure: you cannot file a lawsuit until at least 60 days after submitting your charge, giving the EEOC time to begin work. You do have the right to a jury trial on factual disputes involving money damages.¹¹

What You Can Recover

The most common remedy is back pay: wages and benefits lost from the date of the discriminatory act through the resolution of the case. Where returning to your old job isn’t realistic, courts can award front pay for a reasonable future period. They can also order reinstatement, promotion, or other equitable relief.¹¹

For willful violations, the ADEA adds liquidated damages equal to your back pay award, doubling the financial recovery. A violation is willful when the employer knew its conduct violated the ADEA or acted with reckless disregard of whether it did. In Trans World Airlines, Inc. v. Thurston (1985), the Supreme Court held that merely knowing the ADEA existed is not enough; the employer must have known the specific conduct was prohibited or consciously ignored the risk.¹²

One important limit surprises many plaintiffs. The ADEA does not allow compensatory damages for emotional distress or pain and suffering, and it does not allow punitive damages. Financial recovery is capped at actual economic losses plus liquidated damages in willful cases. That’s a major difference from Title VII, where compensatory and punitive damages are available for intentional discrimination.¹³

Severance Agreements That Waive ADEA Claims

Employers often offer severance packages that require you to waive age discrimination claims. The Older Workers Benefit Protection Act of 1990 sets strict rules. A waiver is only valid if you had at least 21 days to consider the agreement before signing, or 45 days for a group layoff or exit incentive program.¹⁴

After signing, you must also have at least seven days to change your mind and revoke. The waiver doesn’t take effect until that revocation period expires.¹⁴ These aren’t formalities. A waiver that skips the waiting periods, or fails to advise you in writing to consult an attorney, is void, and you can still pursue your ADEA claim even after cashing the severance check. If an employer pushes you to sign quickly, the clock is on your side.

The Narrow Executive Retirement Exception

The ADEA carves out one exception to its general ban on mandatory retirement. An employer can require retirement at age 65 or older for an employee who held a bona fide executive or high policymaking position for the two years immediately before retirement, if the employee is entitled to an immediate, nonforfeitable annual retirement benefit of at least $44,000.¹⁵

The regulation is tight. It does not cover middle managers regardless of salary. The employee must exercise substantial authority over a significant number of people and a large volume of business, and the employer bears the burden of proving every element is “clearly and unmistakably met.”¹⁵ In practice, this reaches a handful of top officers at large companies, not department heads or regional directors.

State Laws Often Reach Further

29 USC 623 sets a federal floor, not a ceiling. Many states have their own age discrimination laws that go further. Some protect workers under 40. Others apply to employers with fewer than 20 employees, with minimum thresholds ranging from one to 15 employees depending on the state.¹⁶ State filing deadlines tend to be more generous, often allowing two to three years.

If your employer is too small for federal coverage, or you’re under 40, a state law may still protect you. Filing with a state agency also extends your federal EEOC deadline from 180 to 300 days, so checking state rules early has practical value even for federal claims.¹⁰

1
Office of the Law Revision Counsel. 29 U.S. Code 623 – Prohibition of Age Discrimination
2
Office of the Law Revision Counsel. 29 U.S. Code 631 – Age Limits
3
Justia U.S. Supreme Court Center. Smith v. City of Jackson, 544 U.S. 228 (2005)
4
Justia U.S. Supreme Court Center. General Dynamics Land Systems, Inc. v. Cline, 540 U.S. 581 (2004)
5
Office of the Law Revision Counsel. 29 U.S. Code 630 – Definitions
6
U.S. Equal Employment Opportunity Commission. Prohibited Employment Policies/Practices
7
U.S. Department of Justice. Gross v. FBL Financial Services, Inc., 557 U.S. 167 (2009)
8
Justia U.S. Supreme Court Center. Western Air Lines, Inc. v. Criswell, 472 U.S. 400 (1985)
9
Justia U.S. Supreme Court Center. Meacham v. Knolls Atomic Power Laboratory, 554 U.S. 84 (2008)
10
U.S. Equal Employment Opportunity Commission. Time Limits for Filing a Charge
11
Office of the Law Revision Counsel. 29 U.S. Code 626 – Recordkeeping, Investigation, and Enforcement
12
Justia U.S. Supreme Court Center. Trans World Airlines, Inc. v. Thurston, 469 U.S. 111 (1985)
13
U.S. Equal Employment Opportunity Commission. Remedies for Employment Discrimination
14
eCFR. 29 CFR 1625.22 – Waivers of Rights and Claims Under the ADEA
15
eCFR. 29 CFR 1625.12 – Exemption for Bona Fide Executive or High Policymaking Employees
16
U.S. Equal Employment Opportunity Commission. Age Discrimination