Age Discrimination in Employment Act: Employer Guide
The ADEA protects workers 40 and over at employers with 20 or more staff. What it bans, the severance waiver rules, and the RIF disclosure.
Age discrimination rarely announces itself. Hardly anybody writes down that they want a younger candidate. What people write instead is high energy, or digital native, or looking for somebody at the start of their career, and phrases like those are the ones that get read back to an employer in a claim.
This guide covers who the Age Discrimination in Employment Act (ADEA) protects, what it prohibits, the language behind many claims, and the seven conditions a severance waiver has to meet before it waives anything.
Start with the coverage threshold, because it is probably not the one you have in mind. Title VII starts at 15 employees. The ADEA starts at 20, so there is a band of businesses covered by one law and not the other, and a much larger band covered by state law regardless.
I build the people and records tooling for businesses without an HR department at FirstHR. This is general information rather than legal advice, and severance waivers in particular are worth a lawyer's eye.
What the ADEA Is
The Age Discrimination in Employment Act is the federal statute protecting workers aged 40 and over from employment discrimination on the basis of age. It works much like the other federal discrimination statutes, with two important structural differences.
The first difference is the threshold, which is 20 employees rather than the 15 that triggers Title VII. The second is that the protected class runs in one direction: it protects older workers, so a claim by a younger worker who was passed over in favor of an older one generally does not arise under this statute (29 CFR 1625.2).
Who It Covers
Coverage has an employer side and an employee side, and small businesses get caught by the employer side less often than by state law. The statutory definition of an employer is 20 or more employees for each working day in each of 20 or more calendar weeks in the current or preceding calendar year (29 U.S.C. 630).
| Question | Federal answer | Note |
|---|---|---|
| What age is protected? | 40 and over | No upper limit, so a 68-year-old is as protected as a 42-year-old |
| How many employees? | 20 or more, for 20 or more calendar weeks | Higher than the Title VII threshold of 15 |
| Are younger workers protected? | Not under this statute | Some state laws differ, so check locally |
| Does it cover applicants? | Yes | Hiring is where coded language problems often arise |
| Does it cover benefits? | Yes, with specific rules | Benefit plan design has its own technical framework |
| Are small employers exempt? | Federally, under 20 employees | State age laws frequently apply from a far lower headcount |
The final row is the one that matters most for a small business. Concluding that you are under the federal threshold and therefore fine answers the federal question, and frequently answers nothing about your actual exposure, because many state statutes reach much smaller employers.
What It Prohibits
The prohibition covers the same broad territory as the other discrimination statutes: hiring, firing, pay, promotion, assignments, training, benefits, and any other term or condition of employment (29 U.S.C. 623).
Two specifics are worth calling out because they are less obvious. The first is age-specific advertising, which is restricted directly, so a job ad stating a preference or a limit based on age is a problem on its own terms rather than only as evidence of a discriminatory decision.
The second is retaliation against somebody who complains or participates in an investigation, which is prohibited separately. Like the advertising rule, it stands on its own: a retaliation claim can succeed even where the underlying complaint fails.
Examples of Age Discrimination in the Workplace
The examples that produce claims against small employers are ordinary management decisions with an age pattern underneath them. Nobody states a preference for a younger worker. The manager can explain the reason, and the reason turns out to track age closely enough that the pattern is visible across a year of decisions.
| Where it shows up | What it looks like | Why it becomes a claim |
|---|---|---|
| Hiring | A shortlist built from an ad asking for a digital native, or one capping experience at five years | The advertising restriction is a problem on its own, before anybody is rejected |
| Promotion | A longer-serving employee passed over because the team is said to need fresh thinking | Fresh thinking reads as a comment on age when the person promoted is twenty years younger |
| Training | Training on a new system offered to part of the team, based on an assumption about who will pick it up | Training is a term of employment, so an assumption about who can learn is the decision itself |
| Pay and benefits | A raise cycle where the budget is openly aimed at retaining early-career staff | Compensation is covered explicitly, and the stated reason is the evidence |
| Job assignment | Client work quietly moved away from an older employee after a customer asked for a younger contact | Assignments are a condition of employment, and the reason for the move is on the record |
| Layoff selection | A reduction where the criteria look neutral and everybody selected is over 55 | The group disclosure hands over the age profile, and the pattern speaks without further argument |
| Harassment | Repeated jokes about retirement, memory, or being out of touch, described internally as banter | Conduct based on age that is severe or pervasive is prohibited like any other harassment |
| Retirement pressure | A manager asking when somebody plans to wind down, in a conversation the employee did not start | Nothing stops an employee retiring, and it is the employer raising it that gets quoted back |
None of these needs an intent to discriminate before it becomes a claim, which is the awkward part of the subject. How decisions like these come to be made in the first place is a bias question rather than a legal one, and I have written that side up separately in the piece on ageism at work.
The Coded Language Problem
Few age claims rest on somebody saying outright that they wanted a younger person. Many rest on phrases everybody uses without thinking, quoted back from an email or a message thread.
Federal rules treat some phrases of this kind as violations. EEOC regulations say help-wanted ads using terms such as young, college student, or recent college graduate violate the Act unless a statutory exception applies (29 CFR 1625.4). An EEOC report marking 50 years of the ADEA also recorded expert testimony about postings that prefer younger workers as digital natives (EEOC, 2018).
What makes these phrases particularly damaging is where they are often found: not in a formal document that somebody reviewed, but in an internal message written quickly, which nobody reviewed and the author had forgotten about entirely. Discovery, the stage of a lawsuit where each side has to hand over its relevant documents and messages, does not distinguish between the two.
Banning words does not fix this, because people simply express the same reasoning in different words. What fixes it is describing what the job actually needs. If the role requires somebody comfortable learning new software quickly, say that, because it is both accurate and something a candidate of any age can demonstrate.
Age in Hiring
Hiring is where the most avoidable exposure sits, because so much of it is created by form fields nobody examined.
A date-of-birth field is not a federal violation by itself. EEOC regulations say an application form that asks for date of birth or age will be closely scrutinized, because the question may deter older applicants or otherwise indicate discrimination against older individuals (29 CFR 1625.5).
Some states have banned the question at the application stage. Connecticut bars employers from requesting age, date of birth, or school attendance and graduation dates on an initial employment application (Conn. Gen. Stat. 46a-60(b)(12)). Colorado has applied a similar rule since July 1, 2024 (Colorado Job Application Fairness Act).
| Practice | Problem | Better version |
|---|---|---|
| Asking for date of birth on the application | Gives you age data before the decision | Collect it after an offer, for benefits and verification |
| Asking for graduation years | Age data by proxy | Ask for the qualification without the year |
| A maximum years of experience cap | Screens out older candidates by design | State the minimum needed, and stop there |
| Recent graduate or entry level in the ad | Reads as an age preference | Describe the level of responsibility instead |
| Culture fit assessed informally | Frequently a proxy for age or similarity | Assess against defined, job-related criteria |
| Overqualified as a rejection reason | Commonly understood as a proxy for being older | Name the actual concern, such as retention or salary expectation, and ask about it |
The last row is worth pausing on because the underlying concern is often legitimate. If you genuinely worry that somebody will leave for a bigger role in six months, that is a fair question to ask directly. Writing overqualified in a rejection note is not asking it; it is recording a conclusion in a word that a jury understands as a synonym for old.
Severance Waivers
A general release does not waive an age claim. An age waiver works only when seven conditions are all satisfied. That makes this the most technical part of the statute, and the part where a small employer is most likely to pay severance for an age waiver that does not hold.
The asymmetry at the end of that list is the point to absorb. Where a waiver fails to meet the requirements, the age claim survives. The employee does not have to hand the severance back before bringing that claim, so a defective agreement can leave you paying severance and defending it anyway (EEOC guidance on waivers).
The EEOC's tender-back regulation (the rule on handing severance back) also bars an employer from abandoning its own obligations under the agreement when the waiver fails. A court can offset the severance against an award only if the employee wins the age claim, and never by more than the smaller of the two amounts (29 CFR 1625.23).
Kelly KapoorCustomer ServiceUp to Date
Darryl PhilbinWarehouseNeeds Attention
Ryan HowardSalesUp to DateGroup Layoffs and the Disclosure
Where severance in exchange for a release is offered to two or more employees as part of an exit incentive or termination program, additional obligations attach to every age waiver in it. They are more demanding than employers expect.
The time to consider the offer rises from 21 days to 45, and a written disclosure attaches to it. The regulation defines a program as additional consideration (something of value beyond what the employees are already owed) offered for a waiver to two or more employees, so a two-person reduction already counts (29 CFR 1625.22).
The disclosure itself covers the class of employees the program reaches, the eligibility factors, any applicable time limits, the job titles and ages of everybody eligible or selected, and the ages of everybody not selected from the same decisional unit, meaning the part of the business the employer chose from.
That last item is the one that produces resistance, because it hands an older worker exactly the information needed to see whether the selection had an age pattern. That is its purpose.
Plan the selection with the disclosure in mind. If you would be uncomfortable disclosing the age profile of who was picked and who was not, that discomfort is worth resolving before the decisions are made rather than at the point of disclosure.
State Law Goes Further
State age discrimination laws are where most small businesses actually sit, and they differ from the federal statute in three ways that matter.
Coverage thresholds are frequently much lower, and several states apply from the first employee, which removes the 20-employee shelter entirely. Some state laws protect against age discrimination without the 40-and-over floor, meaning a younger worker can bring a claim that would not exist federally (EEOC age discrimination guidance).
Remedies differ as well. Federal ADEA relief includes back pay, benefits, reinstatement, attorney fees, and liquidated damages equal to the back pay for a willful violation, with no compensatory or punitive damages available at all (EEOC). A number of state statutes do allow emotional distress and punitive awards.
The practical upshot for a business under 20 employees is to build the practices anyway. They are cheap, they improve hiring, and the state exposure is real even where the federal statute does not reach you. The federal side is spelled out in full in the implementing regulations (29 CFR Part 1625).
What to Actually Do
Here are seven practices to put in place. None of them costs much, and most improve hiring on their own merits.
Where Small Employers Get This Wrong
Six patterns, and none of them involves anybody setting out to discriminate.
Using a general release and assuming it covers age is first. It does not, and a defective waiver leaves the age claim open after the severance has been paid.
Assuming the 15-employee threshold applies is second. This statute starts at 20, and state law frequently starts far lower than either.
Coded language in job ads and messages is third, and it is the source of many claims. Nobody writes it intending an age preference and everybody reads it as one.
Raising retirement unprompted is fourth. It is usually meant kindly and it is quoted back in full.
Paying severance before the revocation period expires is fifth. The agreement is not yet enforceable at that point, and the employee can still revoke it after the money has gone out.
And treating a reduction as age-neutral because the criteria were neutral is last. Criteria that are neutral on their face can still land disproportionately on older workers. That is a disparate impact question rather than an intent question, and it is examined through exactly the disclosure the group waiver rules require you to produce.
Nick Anisimov, FirstHR founder
Frequently Asked Questions
What is the Age Discrimination in Employment Act?
The ADEA is the federal law that protects job applicants and employees aged 40 and over from discrimination because of their age. Its reach covers the whole employment relationship: hiring, firing, pay, promotion, layoffs, training, benefits, job assignments, and every other term or condition of work. It also limits job ads that state an age preference, and it makes it unlawful to punish someone for complaining about age bias or for taking part in an investigation. The Equal Employment Opportunity Commission (EEOC) enforces it, and state age discrimination laws apply alongside it, often to employers too small for the federal law.
How many employees before the ADEA applies?
The ADEA applies once an employer has had 20 or more employees on every working day of at least 20 calendar weeks, in either the current calendar year or the one before. Title VII kicks in at 15, so the age law sets a higher bar, and employers who assume one number applies to every federal discrimination statute tend to get this wrong. For a small business, the real exposure sits in state law: many state age statutes reach much smaller employers, and several cover a business from its first employee.
Is there an upper age limit to the protection?
No. The protection begins at 40 and has no ceiling, so a 70-year-old and a 45-year-old are equally protected. A related point trips employers up: the statute protects older workers specifically, so treating a younger worker worse because of their age is not an ADEA claim, though it may be actionable under some state laws. Preferring a 55-year-old over a 45-year-old is generally not unlawful under the federal statute, while the reverse is.
Can you ask for someone's age or date of birth on an application?
Under federal law you can, though it is almost always a bad idea, and some states ban it on the initial application. The ADEA does not make a date-of-birth question unlawful by itself, but the EEOC scrutinizes such requests closely because they can discourage older people from applying. Connecticut and Colorado go further and prohibit questions about age, birth date, or when the applicant attended or graduated from school on an initial application. Once you ask for age, birth date, or graduation years, you hold information the hiring decision does not need, and you cannot later claim you never had it. If you then reject the candidate, having collected age data before deciding does not help you. If you genuinely need an age or birth date for benefits enrollment or verification, collect it after the offer rather than on the application form.
What are the rules for waiving age claims in a severance agreement?
Seven conditions must all be met before an age waiver counts as knowing and voluntary. The document has to be understandable to the person signing it, name the ADEA rather than releasing claims in general, leave alone any rights that arise after the signing date, and hand over something the employee was not already owed. It must also tell them in writing to see a lawyer, allow at least 21 days to think about the offer, and leave 7 days after signature in which they can change their mind. A group exit program stretches the thinking period to 45 days and adds a written disclosure of who was selected. Miss a single condition and the release does not cover age claims, even though the severance has already gone out.
What is the OWBPA disclosure in a group layoff?
It is the written disclosure that the Older Workers Benefit Protection Act (OWBPA) requires when an employer offers severance in return for a release to two or more employees under an exit incentive or other termination program. Every person in the program who is asked to give up age claims must receive it. It sets out which group of employees the program covers, the factors that decided eligibility, and any time limits that apply. It also lists the job titles and ages of everyone who was eligible or selected, plus the ages of the people in the same decisional unit (the slice of the organization the selections were drawn from) who were not picked. The two-person count includes everyone offered the package, not only those aged 40 or over. The aim is to let an older worker check the selection for an age pattern, which is exactly the information employers are instinctively reluctant to hand over.
Can you offer early retirement to older workers?
Voluntary early retirement incentive plans are permitted where they are genuinely voluntary and meet applicable requirements. The line is between offering an option and applying pressure. Suggesting to an older employee that it might be time to think about retirement, in a conversation they did not initiate, is the kind of statement that appears verbatim in a claim. If somebody raises retirement themselves, respond to what they raised, and do not raise it with anybody else on the basis that they seem the type.
Does the ADEA cover harassment about age?
Yes. Harassment based on age that is severe or pervasive enough to create a hostile work environment, or that results in an adverse employment decision, is prohibited in the same way as harassment on other protected characteristics. In practice age harassment tends to arrive as repeated jokes about being out of touch or about retirement, which colleagues describe as banter and the recipient does not. An employer who hears it and does nothing has the same exposure as with any other form of harassment it tolerated.
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