Every Ontario employer eventually runs into the same uncomfortable moment: an employee asks for an accommodation, and something about the request doesn’t sit right. Can you push back? Sometimes, yes. Sometimes pushing back is itself discrimination. The line between legitimate inquiry and unlawful second-guessing is narrower than most employers assume, and getting it wrong is expensive.
Key Takeaways
- Ontario employers have a duty under the Human Rights Code to accommodate an employee’s disability-related needs up to the point of undue hardship, and can breach the Code through a flawed process alone.
- Employers can ask about an employee’s functional limitations, whether they can perform the essential duties of the job, and what accommodation is needed, and can seek clarification where there is an objective reason to doubt unclear medical information.
- Employers cannot demand a diagnosis, the cause or symptoms of a condition, a second opinion based on a hunch, or additional proof once a request is properly supported.
- Accommodation can only be refused on the three grounds the Code recognizes, cost, outside sources of funding, and health and safety, established with objective evidence.
- Inconvenience, low morale, and customer or co-worker preferences are not valid reasons to deny accommodation.
What the Law Actually Requires Before You Ask Anything
Under the Ontario Human Rights Code, employers have a duty to accommodate an employee’s disability-related needs up to the point of undue hardship. That duty has two parts, and both matter. The substantive part is the accommodation you ultimately provide. The procedural part is how you get there, the questions you ask, the information you gather, the options you canvass. Ontario tribunals have been clear that you can breach the Code by botching the process alone, even where no accommodation was ultimately possible.
That framework is the reason “just push back and see what happens” is a losing strategy. The governing legal test asks whether a workplace rule or standard is genuinely necessary and whether the employee can be accommodated short of undue hardship. Your questions are supposed to serve that inquiry, not to test the employee’s honesty. Keep that distinction in mind and most of the hard calls resolve themselves.
Accommodation Requests You Are Allowed to Question
Whether there is a genuine, Code-related need
You are entitled to enough information to satisfy yourself that a request actually connects to a disability or another protected ground. An employee who simply says they feel “stressed” or “unwell” has not necessarily triggered anything; you can ask for enough to confirm the request relates to a disability and to understand what it requires. You are entitled to know enough to assess the bona fides of a leave request and to work out what accommodation might realistically be workable.
The functional limitations, not the label
You can and should ask what the employee can and cannot do: the restrictions, the limitations, how they interact with the essential duties of the job, and what adjustments would let the person keep working. The focus belongs on functional capacity and how it fits the workplace, not on the underlying cause.
Information that is genuinely inadequate
Where there is an objective, reasonable basis to think the medical information you received is unclear, incomplete, or doesn’t actually address the accommodation being sought, you can go back and ask a qualified health professional for confirmation or clarification. The key word is objective. A real gap in the information is fair game; a hunch is not.
Fitness to return to safety-sensitive work
If an employee returns from leave to a genuinely safety-sensitive role and you have real, observable reason to doubt they can perform it safely, slowed reactions, repeated errors, difficulty focusing, you may be justified in requesting an independent medical examination. Again, this is grounded in objective concern about health and safety, not discomfort with the request.
Whether the employee is holding up their end
Accommodation is a two-way street. The employee has to make their needs known, answer reasonable questions about their limitations, and cooperate with the process. Where an employee refuses to provide information you legitimately need, the duty can reach its limit, a point we explore more fully in our discussion of why the duty to accommodate is not absolute.
The accommodation itself, you owe a reasonable option, not the ideal one
If two accommodations meet the employee’s needs equally and with equal dignity, you are entitled to choose the one that is less costly or less disruptive. The Code protects the employee’s needs, not their preferences.
Accommodation Requests You Are Not Allowed to Question
The diagnosis, the cause, the symptoms, the treatment
As a default, none of this is your business. You are entitled to know that a disability exists, what the person’s limitations are, and what they need, not the name of the condition or how it was contracted. Demanding a diagnosis as a matter of routine is one of the most common and most avoidable mistakes we see.
Your own theory of what a disability “should” look like
An employer who tells an employee “my uncle has that condition and he never needed time off,” then demands a second opinion, is not conducting an inquiry, they are substituting a lay impression for a physician’s judgment. Tribunals treat this as a Code violation. You do not get to second-guess proper medical documentation because the disability doesn’t match your mental picture of it.
A request already backed by adequate documentation
Once an employee has provided medical documentation that reasonably establishes a disability and sets out the relevant limitations, you cannot keep moving the goalposts, insisting on a “clean bill of health,” a cap on future medical leave, or confirmation from a second specialist. Piling on requirements after the accommodation has been substantiated is itself discriminatory conduct.
For a closer look at the documentation side of this, when a doctor’s note is appropriate and exactly what you can ask it to say, see our companion piece on requesting medical documentation.
The Real Limit is Undue Hardship, and It’s a High Bar
When employers ask us “at what point can I say no,” the honest answer is: only where you can prove undue hardship, and only on the three grounds the Code recognizes. Those are cost, outside sources of funding, and health and safety. That is the entire list. Business inconvenience, administrative hassle, grumbling from co-workers, and customer preference are not valid considerations. The evidence has to be real, direct, objective and, for cost, quantifiable. A refusal built on assumptions rather than evidence is not an undue-hardship defence; it’s exposure.
Protecting Your Organization
Most accommodation disputes are lost on process, not substance. A few habits go a long way:
Document the request and every step you take in response, and keep an employee’s medical information separate from their personnel file. Route sensitive information to HR rather than a direct supervisor wherever you can, and share only what people genuinely need to know. Remember that the cost of obtaining medical documentation to support accommodation generally falls on the employer, not the employee. And train the managers who field these requests, most damaging missteps happen in an unscripted first conversation, long before anyone thinks to call counsel.
Building these habits into your workplace policies and your HR advisory and training is far cheaper than defending a human rights application. The same principles extend to leave and return-to-work situations, including long-term illness leave, where over-asking is a frequent trigger for complaints. If you’re unsure whether a request crosses the line, the safest move is to get advice before you refuse, not after.
Facing an Accommodation Request You’re Not Sure How to Handle?
Greenwood Law advises Ontario employers on the full accommodation process, from the first conversation and the questions you can safely ask, to defending human rights complaints when a dispute escalates. Contact Greenwood Law for a confidential consultation before you respond to a request or refuse one.
