In Ontario, frontline managers and supervisors can be held personally liable under the Occupational Health and Safety Act (OHSA) for ignoring safety hazards or directing unsafe work. If a worker is injured or killed, a negligent supervisor could face personal fines of up to $500,000 CAD and up to 12 months in jail, alongside heavy corporate penalties for the employer.
Understanding Supervisor Liability Under the OHSA
Going to work in Ontario should never mean risking your life. Whether you are on a busy construction site in Toronto, a manufacturing plant in Hamilton, or an office in Ottawa, workplace safety is a shared legal responsibility. Under the Occupational Health and Safety Act (OHSA), the law does not just punish the faceless corporation when things go wrong; it directly targets the individuals in charge on the ground.
A “supervisor” under the OHSA is anyone who has charge of a workplace or authority over a worker. 📑 This means you do not need the formal title of “Manager” to be held liable. If you are a lead hand, a foreman, or simply the person directing the daily tasks of others, the Ministry of Labour considers you a supervisor. You have a strict legal duty to ensure workers comply with safety regulations, to advise them of potential dangers, and to take every reasonable precaution in the circumstances for their protection.
When a severe accident occurs, Ministry of Labour inspectors will immediately investigate who gave the orders. If a supervisor knew a machine was missing a safety guard or ignored a worker’s complaint about unsafe scaffolding, they can be personally charged with an offence. These are quasi-criminal charges, meaning you could face massive fines and actual jail time. Consulting an employment lawyer or a criminal defence law firm specializing in OHSA violations is absolutely critical if you are under investigation.
Step-by-Step Guide: What to Do if Directed to Perform Unsafe Work
If your supervisor orders you to do something dangerous, you have the absolute legal right to refuse unsafe work. The process must be handled carefully to protect your rights and trigger a proper safety review.
Step 1: Firmly Refuse the Task
The moment you identify a genuine hazard, you must tell your supervisor that you are refusing to work. 🚩 You must explicitly state that you believe the task, equipment, or physical condition of the workplace is likely to endanger you or another worker. Once you trigger this right, your employer cannot legally fire you or discipline you; doing so is an illegal reprisal.
Step 2: Participate in the Internal Investigation
Your supervisor cannot simply order you back to work or secretly assign the dangerous task to someone else. They must investigate the hazard immediately in the presence of you and a designated health and safety representative (often a union member or a member of the Joint Health and Safety Committee). During this time, you must remain in a safe place nearby.
Step 3: Escalate to the Ministry of Labour
If the supervisor insists the work is safe but you still have reasonable grounds to believe it is dangerous, the internal process ends. 🗣️ At this point, either you, the safety representative, or the employer must call the Ontario Ministry of Labour. A provincial inspector will be dispatched to your workplace to conduct an independent, legally binding review of the hazard.
Step 4: The Inspector’s Decision
While waiting for the inspector, you may be assigned reasonable alternative work. The Ministry inspector will arrive, interview the worker and the supervisor, and issue a written decision. If the inspector agrees it is unsafe, they will issue strict compliance orders to the employer. If they declare it safe, you are legally required to return to the task.
How Much Are the Fines in Ontario?
As of May 2026, the financial penalties for violating the OHSA are some of the steepest in Canadian employment law. 💰 The government uses these heavy fines as a strong deterrent against prioritizing profit over human lives.
- Supervisor / Individual Worker Fines: An individual can be fined up to $500,000 CAD per offence and sentenced to up to 12 months in jail.
- Corporate Director Fines: A director or officer of the corporation can face personal fines of up to $1,500,000 CAD and up to 12 months in jail.
- Corporate / Employer Fines: The corporation itself can be fined a staggering maximum of $2,000,000 CAD per violation.
- Lawyer Fees: If a supervisor is personally charged and must hire a defence law firm, legal representation for an OHSA trial can easily cost between $20,000 and $75,000+ CAD.
Comparing OHSA Duties by Role
| Role | Primary Legal Duty | Maximum Personal Fine |
|---|---|---|
| Worker | To work safely, wear required protective gear, and report hazards immediately. | $500,000 CAD |
| Supervisor | To ensure workers follow the law, advise them of dangers, and provide written instructions. | $500,000 CAD |
| Employer / Corporation | To provide a safe environment, maintain equipment, and establish a health and safety policy. | $2,000,000 CAD |
| Corporate Director | To take all reasonable care to ensure the corporation complies with the OHSA. | $1,500,000 CAD |
How Long Does an Investigation Take?
When a worker exercises their right to refuse unsafe work, the initial internal investigation by the supervisor must happen immediately. If escalated, a Ministry of Labour inspector will usually arrive within a few hours for urgent hazards. However, if a severe injury or fatality occurs, the Ministry’s comprehensive prosecution investigation can take up to 12 to 24 months before formal charges are laid in provincial court.
Frequently Asked Questions (FAQ)
Can I be fired for refusing unsafe work?
Absolutely not. The OHSA strictly prohibits employers from firing, suspending, or even threatening a worker for exercising their health and safety rights. This is called an illegal reprisal, and you can file an immediate complaint with the Ontario Labour Relations Board (OLRB) to be reinstated with back pay.
What if the supervisor didn’t know about the hazard?
Ignorance is rarely a valid defence. Supervisors have a proactive legal duty to inspect the workplace and identify hazards. If a reasonable supervisor should have noticed the missing safety guard, the Ministry can still lay charges based on negligence or “willful blindness.”
Does my employer pay my OHSA fines?
No. If a supervisor is personally convicted of an offence under the OHSA, the court generally expects the individual to pay the fine out of their own pocket. Furthermore, it is against public policy for companies to buy insurance that covers criminal or quasi-criminal fines.
Are police involved in workplace accidents?
Yes, in cases of severe injury or death. Under the Westray Bill (an amendment to the Criminal Code of Canada), local police will investigate alongside the Ministry of Labour. If the supervisor showed reckless disregard for human life, they can be charged with criminal negligence causing death, which carries a potential life sentence.
Can I refuse work because of workplace harassment?
Yes. The definition of workplace violence and harassment is fully integrated into the OHSA. If you are facing a genuine threat of physical violence from a colleague, customer, or supervisor, you have the right to refuse work and remove yourself from the unsafe environment.
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