What Are the Elements of an ADA Discrimination Claim?

To win an employment case under the Americans with Disabilities Act, you generally have to prove four elements of an ADA discrimination claim: you have a qualifying disability, you’re qualified for the job, your employer took an adverse action against you, and your disability caused that action. A separate but closely related claim exists when an employer refuses a reasonable accommodation. And before any of this reaches a courtroom, you have to file a timely charge with the Equal Employment Opportunity Commission.

First, Check Whether the ADA Covers Your Employer

Title I applies only to employers with 15 or more employees on the payroll for at least 20 calendar weeks in the current or previous year.¹ Part-time workers count; independent contractors do not. State and local governments are covered no matter their size. If your employer falls below the threshold, your state’s disability discrimination law may still protect you, since many states set lower minimums or none at all.

Element One: A Qualifying Disability

The ADA defines disability three ways, and meeting any one of them satisfies this element.² After the 2008 amendments, Congress made clear the definition should be read broadly in favor of coverage.

Actual Disability

The most common path is a physical or mental impairment that substantially limits one or more major life activities.² Major life activities include walking, seeing, hearing, breathing, learning, reading, concentrating, thinking, communicating, and working. The statute also reaches major bodily functions: immune system function, normal cell growth, digestion, neurological and brain function, circulation, and the endocrine and reproductive systems. Extensive medical evidence isn’t required, and substantial limitation on a single major life activity is enough.

Record of a Disability

You’re also protected if you have a documented history of a qualifying impairment, even if it no longer limits you.² This most often matters for people who have recovered from conditions like cancer or a serious mental health episode. If your employer treats you differently because of that medical history, this prong applies.

Regarded as Having a Disability

The third path applies when your employer takes action against you because it believes you have an impairment, whether or not you actually do and whether or not any impairment limits a major life activity.² One carve-out: this prong doesn’t reach impairments that are both minor and temporary, meaning an actual or expected duration of six months or less. So if your employer fires you because it wrongly assumes you have epilepsy, this prong protects you even though you don’t have the condition.

The Current Illegal Drug Use Exclusion

Anyone currently using illegal drugs is excluded from the definition of disability, so long as the employer’s action is based on that use.³ Protection returns if you have successfully completed a rehabilitation program and are no longer using, if you are currently in a supervised program and have stopped using, or if your employer wrongly believes you’re using when you’re not. Prescription medications taken under a doctor’s supervision don’t count as illegal drug use even if the substance is otherwise controlled.

Element Two: You’re Qualified for the Job

A disability alone isn’t enough. You also have to be a “qualified individual,” meaning someone who can perform the essential functions of the job with or without a reasonable accommodation.¹ Courts usually break this into two questions.

Do you meet the job’s prerequisites? That means the education, experience, licenses, and other qualifications the employer legitimately requires. If a position requires a commercial driver’s license and you don’t have one, the ADA won’t get you around that.

Can you handle the essential functions? Essential functions are the fundamental duties that define the position, not the marginal tasks that could easily be reassigned. The employer’s own judgment carries weight, especially if the duties appear in a written job description prepared before posting the opening.¹ Other evidence that matters: how much time employees actually spend on the function, whether coworkers can absorb it, the consequences of removing it, and the terms of any collective bargaining agreement.⁴

“With or without reasonable accommodation” does heavy lifting here. You don’t have to perform every function unassisted. If a schedule change or assistive equipment would let you handle the essential duties, you’re still qualified.

Element Three: An Adverse Employment Action

You need to show the employer did something materially harmful to your employment. The statute reaches discrimination in hiring, firing, promotions, compensation, training, and other terms and conditions of employment.⁵ Reassignment to a role with significantly different responsibilities counts. So does being passed over for a promotion you were qualified for, or a pay cut.

Minor slights don’t qualify. An offhand comment about your condition may be relevant evidence of motive, but it isn’t itself an adverse action unless it’s part of harassment severe enough to alter your working conditions. The action needs to be a real, tangible change in your employment status or benefits.

Element Four: Causation

This is where most ADA cases are won or lost. You have to connect the adverse action to your disability, and the legal standard has been shifting in a direction that matters.

Several federal appellate courts have moved toward requiring “but-for” causation, meaning the adverse action would not have happened if you didn’t have a disability. That shift followed the Supreme Court’s reasoning in age discrimination and Title VII retaliation cases rejecting the more plaintiff-friendly “motivating factor” standard. The Ninth Circuit, among others, has applied the same logic to ADA discrimination claims. The standard in your jurisdiction may differ, but the trend is toward but-for causation as the minimum threshold.

The Burden-Shifting Framework

Most plaintiffs don’t have a smoking-gun email in which the employer admits to discrimination. When direct evidence isn’t available, courts use a three-step framework. First, you establish a basic case: disability, qualification, adverse action, and circumstances suggesting discriminatory intent. That last piece can be shown through evidence such as the employer replacing you with a non-disabled person or treating similarly situated employees without disabilities more favorably.

Once you clear that initial hurdle, the burden shifts to the employer to offer a legitimate, non-discriminatory reason for its decision. The employer might say it fired you for poor attendance, eliminated your position in a restructuring, or picked a more experienced candidate for the promotion.

You then get the final word by proving the stated reason is a pretext for discrimination. Evidence of pretext includes an explanation that shifts over time, inconsistency with written policies, a suspicious timeline between your disclosure of a disability and the adverse action, or other employees committing the same alleged infraction without consequences.

The Parallel Claim: Failure to Provide Reasonable Accommodation

Separate from straightforward discrimination, the ADA makes it unlawful for an employer to refuse reasonable accommodations for a qualified employee’s known physical or mental limitations, unless doing so would impose an undue hardship.⁵ Many ADA claims are built entirely around this theory.

The statute defines reasonable accommodation to include making workspaces accessible, restructuring job duties, modifying schedules, reassigning you to a vacant position, and providing assistive equipment or qualified interpreters.¹ The point is removing barriers so you can perform at the same level as your colleagues.

The Interactive Process

Once your employer knows about your disability and you have requested an accommodation, EEOC regulations require both sides to engage in an informal back-and-forth dialogue to identify what you need and what options exist.⁶ A formal meeting isn’t necessary; an email exchange or conversation with your manager can satisfy it. What matters is that the employer genuinely participates rather than stonewalling. An employer that refuses to engage at all has a much harder time arguing later that no workable accommodation existed.

The Undue Hardship Limit

An employer isn’t required to provide an accommodation that would cause significant difficulty or expense relative to the business. The statute lists factors: the cost of the accommodation, the financial resources of the specific facility and the company overall, the total number of employees, and the nature of the business operations.¹ What qualifies as undue hardship for a 20-person company would be unremarkable for a Fortune 500 employer. The analysis is always case-specific.

The Direct Threat Defense

An employer may also refuse to hire or retain someone who poses a significant risk to the health or safety of others that can’t be eliminated through reasonable accommodation.¹ The defense requires an individualized assessment based on current medical knowledge, not generalizations or stereotypes. Courts weigh the nature, duration, severity, and probability of the potential harm. If a reasonable accommodation would reduce the risk to an acceptable level, the defense fails.

File With the EEOC First, and Watch the Clock

This is the step people miss most often, and missing it can destroy an otherwise strong claim. Before you can file an ADA lawsuit in court, you have to file an administrative charge with the EEOC.⁷ Skip this step and a court will dismiss for failure to exhaust administrative remedies, no matter how clear the discrimination was.

You have 180 calendar days from the discriminatory act to file with the EEOC. That deadline extends to 300 days if your state has its own agency enforcing a disability discrimination law, which most states do.⁸ Weekends and holidays count. If multiple discriminatory events occurred, the deadline applies separately to each. For ongoing harassment, you file within 180 or 300 days of the last incident, and the EEOC will examine the full pattern when investigating.

Federal employees face a tighter timeline: you have to contact your agency’s EEO counselor within 45 days of the discriminatory act.⁸

After the EEOC investigates, it issues a right-to-sue letter. Once you receive it, you have 90 days to file a lawsuit in federal court. That window is firm, and courts routinely dismiss cases filed even one day late.

What You Can Recover

If you prevail, the remedies depend on what happened to you. An employer that refused to hire or wrongfully fired you may be ordered to place you in the position and pay back wages and benefits you lost.⁹ Back pay and front pay (projected future lost earnings) are not subject to statutory caps.

Compensatory damages for emotional harm and punitive damages for especially egregious conduct are available but capped. The combined total cannot exceed a limit that scales with employer size:¹⁰

15 to 100 employees: $50,000
101 to 200 employees: $100,000
201 to 500 employees: $200,000
More than 500 employees: $300,000

These caps have not been adjusted since Congress set them in 1991, and they apply per complainant, not per claim. A jury may award more, but the judge has to reduce the amount to the applicable cap. Courts can also order the employer to change its policies, provide training, or take other corrective steps to prevent future discrimination.

1
Office of the Law Revision Counsel. 42 USC 12111 – Definitions
2
Office of the Law Revision Counsel. 42 USC 12102 – Definition of Disability
3
Office of the Law Revision Counsel. 42 USC 12210 – Illegal Use of Drugs
4
U.S. Equal Employment Opportunity Commission. The ADA: Your Responsibilities as an Employer
5
Office of the Law Revision Counsel. 42 USC 12112 – Discrimination
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U.S. Equal Employment Opportunity Commission. Enforcement Guidance on Reasonable Accommodation and Undue Hardship Under the ADA
7
Office of the Law Revision Counsel. 42 USC 12117 – Enforcement
8
U.S. Equal Employment Opportunity Commission. Time Limits for Filing a Charge
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U.S. Equal Employment Opportunity Commission. Remedies for Employment Discrimination
10
Office of the Law Revision Counsel. 42 USC 1981a – Damages in Cases of Intentional Discrimination