In Ontario, employers must accommodate a disabled worker to the point of “undue hardship.” A measurable, severe health and safety risk can legally qualify as undue hardship, but defending this refusal at the Human Rights Tribunal of Ontario typically requires formal safety audits and legal counsel, with costs often exceeding $10,000 CAD.
Operating a business in Ontario involves navigating a delicate balance between human rights and workplace safety. Whether you manage a manufacturing plant in Hamilton, a construction site in Toronto, or a hospital ward in Mississauga, the Ontario Human Rights Code mandates that you must accommodate employees with disabilities. However, this duty is not absolute. When an accommodation creates a genuine, significant danger to the employee, their co-workers, or the general public, an employer may legally claim that the accommodation causes “undue hardship.”
Refusing to accommodate a worker due to a health and safety risk is a legally perilous decision. The Human Rights Tribunal of Ontario (HRTO) views the defense of undue hardship with extreme scrutiny. You cannot base your refusal on assumptions, stereotypes, or minor inconveniences. Generally, an employer must provide concrete, scientific, and measurable proof that the risk cannot be mitigated. Working with an employment lawyer or law firm is crucial to ensure that your safety protocols do not inadvertently lead to a costly discrimination lawsuit.
Step-by-Step Process for Assessing Health and Safety Risks in Ontario
Before an employer can legally declare undue hardship, they must follow a rigorous, documented process to evaluate the disabled worker’s limitations against the realities of the workplace.
Step 1: Obtain Clear Medical Restrictions
The first step is to request detailed medical information from the employee’s treating physician. You are not entitled to know their specific diagnosis, but you must know their exact physical or cognitive restrictions. For example, if a heavy machinery operator is prescribed medication that causes drowsiness, the doctor must clearly outline their ability to maintain focus and operate equipment safely.
Step 2: Investigate Alternate and Modified Roles
Once you have the medical restrictions, you must explore every possible way to accommodate them. Can the worker be moved to a desk job temporarily? Can their lifting requirements be modified? The employer must search the entire organization for suitable work. Refusing to accommodate is only legally acceptable after all other reasonable options have been exhausted.
Step 3: Conduct a Formal Safety Risk Assessment
If you believe that modifying the role still leaves a significant safety risk, you must conduct an objective risk assessment. This should align with the rules of the Occupational Health and Safety Act (OHSA). You must evaluate the probability of an accident occurring, the potential severity of the injuries, and who exactly is at risk. Vague fears that someone “might get hurt” are never enough for the HRTO.
Step 4: Attempt to Mitigate the Identified Risks
Even if a severe risk is identified, the duty to accommodate requires you to try and lower that risk to an acceptable level. This might involve purchasing specialized safety harnesses, installing additional machine guards, or providing a dedicated spotter. You must calculate the cost of these mitigations. If the financial cost would bankrupt the company, that can also form part of your undue hardship claim.
Step 5: Document the Refusal and Notify the Employee
If the risk remains unacceptably high despite all mitigation efforts, you must document your findings comprehensively. You must formally notify the employee in writing, explaining exactly why their requested accommodation poses an undue hardship due to health and safety concerns. It is highly recommended to have an employment lawyer review this letter before it is delivered.
How Much Does it Cost to Defend Undue Hardship in Ontario?
Relying on a health and safety defense is expensive because it requires concrete proof and expert opinions. As of May 2026, Ontario employers should budget for the following estimated costs:
- Ergonomic or Safety Consultants: Hiring an independent safety expert to conduct a formal risk assessment typically costs between $2,500 and $6,000 CAD.
- Legal Consultations: Having an employment lawyer guide the accommodation process generally requires a retainer of $2,000 to $5,000 CAD.
- HRTO Litigation: Defending a discrimination claim at the Human Rights Tribunal of Ontario can easily cost an employer $15,000 to $35,000 CAD in legal fees.
- Potential Damages: If the HRTO finds your safety claim was based on stereotypes, you could be ordered to pay injury to dignity damages ranging from $15,000 to $40,000+ CAD, plus retroactive lost wages.
How Long Does the Process Take?
The internal assessment process should be conducted promptly. Gathering medical notes and completing a safety audit generally takes 3 to 6 weeks. During this time, the employee is typically placed on a paid or unpaid medical leave, depending on company policy. If the employee disagrees with your refusal and files a human rights application, resolving the matter through the HRTO generally takes 1.5 to 3 years due to significant procedural backlogs in Ontario.
Comparing Stereotypical Risks vs. Measurable Risks
| Stereotypical Risk (Not Legal) | Assuming an older worker with a mild heart condition will have a heart attack if they lift boxes. | Likely deemed discriminatory. Fails the undue hardship test. |
| Measurable Risk (Legal Defense) | A forklift driver who suffers from unpredictable, uncontrolled seizures during their shifts. | Likely qualifies as undue hardship due to severe, proven risk to public safety. |
Frequently Asked Questions (FAQ)
Does OHSA override the Human Rights Code?
No. In Ontario, the Human Rights Code generally has primacy over other legislation. However, the HRTO recognizes that complying with the strict safety mandates of the Occupational Health and Safety Act (OHSA) is a valid factor when determining if an accommodation creates an undue hardship.
Can I force the employee to sign a liability waiver?
No. You cannot ask an employee to sign away their right to a safe workplace or assume the legal risk of an unsafe accommodation. An employee’s willingness to accept a severe safety risk does not absolve the employer of their legal responsibilities under OHSA.
What if the union disagrees with the safety assessment?
In a unionized environment, the union has a shared legal obligation to facilitate the accommodation process. If they block a reasonable accommodation or disagree with a safety audit, they can also be named as a respondent in a human rights complaint. Collaboration is essential.
Can I demand an Independent Medical Examination (IME)?
Generally, an employer must rely on the medical notes provided by the employee’s own doctor. You can only request an IME by an independent specialist if the employee’s doctor provides vague, contradictory, or insufficient information after multiple requests for clarification.
Leave a Reply