How Long Can a Reasonable Accommodation Last Under the ADA?

A reasonable accommodation under the ADA lasts as long as you need it to perform the essential functions of your job. There is no fixed maximum, no built-in expiration, and no calendar rule that ends it after a certain number of months or years. The duration follows your medical situation. If your disability-related limitation is permanent, the accommodation can be permanent. If the limitation is temporary, the accommodation ends when the limitation does. Your employer’s obligation to keep it in place continues as long as the underlying need continues and the arrangement doesn’t create an undue hardship for the business.¹

That framing matters because it flips a common assumption. Accommodations aren’t approved for a set term the way a lease is. They’re an ongoing duty tied to your ability to do the job.

Why the ADA Sets No Fixed Duration

The statute treats accommodation as a continuing obligation, not a one-time favor. Employers can review an existing arrangement to confirm it’s still needed and still working, but they cannot simply pull it because a certain amount of time has passed, and they cannot set an arbitrary end date unrelated to your medical situation.¹

One boundary to know up front: the ADA’s accommodation rules only reach employers with 15 or more employees.² You also need to be a qualified individual, meaning you can perform the essential functions of the job with or without the accommodation.³ Smaller employers may still be covered by state disability laws with different rules.

When an Accommodation Can Legitimately End

Four situations end an accommodation lawfully. None of them lets an employer stop accommodating you without a conversation first.

Your medical situation improves to the point that the disability no longer limits your ability to do the job. The basis for the accommodation is gone.
Your employment ends. If you resign, retire, or are terminated for reasons unrelated to your disability, the accommodation ends with the job.
The accommodation stops working. If the current arrangement isn’t effective and no modification can fix it, the employer must look at alternatives, but isn’t required to keep an ineffective one in place.¹
The job itself changes. If the essential functions of your position are significantly restructured, the original accommodation may no longer fit, and a new interactive process figures out what replaces it.

Notice what’s not on that list: employer inconvenience, cost annoyance short of undue hardship, coworker complaints, or the simple passage of time.

What Employers Must Do Before Changing or Ending One

Either side can ask to change an existing accommodation. Your condition may shift, the arrangement may lose effectiveness, or the employer’s operations may change. Whatever the trigger, the ADA requires both sides to engage in the interactive process, a back-and-forth conversation aimed at finding a workable solution.¹

The single most important rule inside that process: an employer cannot just remove an accommodation because it has become inconvenient. If the original arrangement is no longer viable, the employer must work with you to explore alternatives. The obligation is to find a different effective accommodation, not to abandon the effort.⁴

If your employer refuses to engage in that dialogue at all, the refusal itself can create legal liability for failure to accommodate.¹ Ignoring a request or stonewalling the process is not a neutral act under the law.

When Employers Can Ask for Updated Medical Documentation

An accommodation’s duration is often tested by a request for new paperwork. Your employer can ask for updated medical information, but the request must be job-related and consistent with business necessity, meaning the employer needs a reasonable belief, based on objective evidence, that your ability to perform essential functions is affected by a medical condition or that you pose a direct threat to safety.⁵

There’s a distinction worth holding onto. If your disability was already documented as a permanent condition, the employer cannot keep asking you to prove you still have it. They can ask for documentation about why you need a specific accommodation, especially if the connection between the condition and that particular adjustment isn’t obvious.¹ Proving the disability exists and explaining why a particular workplace change helps are two different questions.

How Duration Works for Medical Leave

Leave is where duration questions get sharpest. Your employer must consider unpaid leave as a reasonable accommodation even if you’ve exhausted leave under the employer’s own policy, FMLA, or workers’ compensation, as long as the leave doesn’t create an undue hardship.⁶ A maximum-leave policy does not automatically cap the accommodation.

The hard limit is indefinite leave. If you cannot say whether or when you’ll be able to return to work at all, that qualifies as undue hardship and does not have to be provided.⁶ But you don’t need a precise return date. An approximate timeline is enough, and an employer cannot claim undue hardship just because your return date is approximate rather than exact.¹

While you’re on leave without a fixed return date, your employer can require periodic updates on your condition and your expected timeline. After each update, they can reassess whether continuing to hold your position open creates an undue hardship. Stay in regular contact. Going silent during leave is one of the fastest ways for an otherwise solid accommodation to unravel.

Undue Hardship: The Only Real Off-Ramp

The only legal basis for an employer to deny or discontinue an accommodation is undue hardship, defined by the ADA as significant difficulty or expense relative to the employer’s resources.² The bar is high. Minor costs, small administrative burdens, and coworker grumbling don’t reach it.

The analysis is case by case. Factors include the cost of the accommodation and its operational impact, the employer’s overall financial resources (not just the individual location but the parent company if one exists), the size of the workforce, and the type and structure of the business. A twenty-person company faces a different calculus than a twenty-thousand-person company.

There’s also a splitting rule worth knowing. If part of an accommodation’s cost would cause undue hardship but the rest wouldn’t, the employer should ask whether you’re willing to pay the difference.¹ You are never required to. Even if you decline, the employer still must provide whatever portion of the accommodation it can afford without undue hardship, or find a less expensive alternative.

What to Do If Your Accommodation Is Ended Improperly

If your employer removes an accommodation without going through the interactive process, or retaliates against you for asking for one, you have options. The ADA prohibits employers from threatening, intimidating, or interfering with your right to request and use an accommodation.⁷ That covers pressure not to ask, punishment after asking, and discouragement from filing a complaint.

To file formally, you generally need to submit a charge of discrimination with the EEOC within 180 calendar days of when the discrimination occurred. The deadline extends to 300 days if your state or local government has its own agency enforcing a similar anti-discrimination law, which most states do. If the last day falls on a weekend or holiday, you have until the next business day.⁸

Keep your own records. Document every request, every response, every piece of medical documentation you submit, and every conversation about modifications or denials. Federal regulations require employers to retain accommodation-related records for at least one year, and longer if a charge has been filed.¹ Your copies mean you’re not relying only on your employer’s files if a dispute arises.

1
U.S. Equal Employment Opportunity Commission. Enforcement Guidance on Reasonable Accommodation and Undue Hardship under the ADA
2
Office of the Law Revision Counsel. 42 U.S. Code 12111 – Definitions
3
Office of the Law Revision Counsel. 42 U.S. Code 12112 – Discrimination
4
eCFR. 29 CFR 38.14 – Reasonable Accommodations and Reasonable Modifications for Individuals with Disabilities
5
U.S. Equal Employment Opportunity Commission. Disability Discrimination and Reasonable Accommodation: Medical Inquiries, Leave and Telework
6
U.S. Equal Employment Opportunity Commission. Employer-Provided Leave and the Americans with Disabilities Act
7
U.S. Equal Employment Opportunity Commission. Disability Discrimination and Employment Decisions
8
U.S. Equal Employment Opportunity Commission. Time Limits For Filing A Charge