Workplace Harassment — Ontario Employment Law
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About Workplace Harassment
Under the Ontario Occupational Health and Safety Act (OHSA), workplace harassment is defined as engaging in a course of vexatious comment or conduct against a worker in a workplace that is known or ought reasonably to be known to be unwelcome. While people often associate harassment with human rights violations, such as racism or sexism, Ontario law also protects workers from general psychological harassment, bullying, and intimidation that is not tied to a protected ground. This includes repeated derogatory comments, yelling, or aggressive behavior that makes the work environment intolerable.
It is equally important to understand what does not constitute harassment. The OHSA explicitly states that a reasonable action taken by an employer or supervisor relating to the management and direction of workers or the workplace is not workplace harassment. Routine performance reviews, reasonable disciplinary actions, or legitimate Performance Improvement Plans (PIPs) are generally permissible. However, if a PIP is deployed unfairly as retaliation shortly after an employee raises a harassment complaint, it can be viewed by the courts as part of a toxic work environment and may contribute to a constructive dismissal claim.
Employers in Ontario have a strict legal duty to maintain a harassment policy and to conduct an investigation into any incidents or complaints of workplace harassment that is appropriate in the circumstances. Failing to investigate, conducting a biased investigation, or ignoring abusive conduct by a manager or co-worker can expose an employer to significant legal liability. Conversely, employees who are found to have committed severe workplace harassment may face termination for cause, meaning they can be fired without severance pay.
For workers governed by a collective agreement, the avenue for resolving harassment disputes is typically different. The courts generally rule that disputes regarding workplace assault, harassment, and an employer's failure to enforce internal policies must be resolved through mandatory grievance arbitration rather than civil lawsuits, following the core principles of Ontario labour law.
Because the threshold between tough management and unlawful harassment is highly dependent on individual circumstances, anyone dealing with a toxic workplace should seek out a qualified legal professional to assess the specific facts and determine the best strategic approach before taking action.
Frequently Asked Questions
What is the legal definition of workplace harassment in Ontario?
Under the Occupational Health and Safety Act, it means engaging in a course of vexatious comment or conduct against a worker that is known or ought reasonably to be known to be unwelcome. This covers bullying and intimidation, even if it has nothing to do with discrimination based on race, gender, or religion.
Is my employer legally obligated to investigate my harassment complaint?
Yes. Ontario employers have a statutory duty under the OHSA to conduct an investigation that is 'appropriate in the circumstances' whenever they become aware of an incident or receive a complaint about workplace harassment.
Can my employer put me on a performance plan if I complain about a toxic work environment?
An employer cannot legally penalize you for exercising your right to report harassment. If you are suddenly placed on a Performance Improvement Plan (PIP) immediately after complaining about a toxic manager, this could be considered an unlawful reprisal under the OHSA.
Can I be fired for without severance if I am accused of yelling at coworkers?
Yes, depending on the severity and frequency of the behavior. Courts in Ontario have upheld terminations for cause without notice or severance when an employee's conduct constitutes severe workplace harassment and breaches the employer's code of conduct.
Can I just sue my employer in court if I am unionized and being bullied?
Generally, no. If your employment is governed by a collective agreement, disputes regarding harassment and policy enforcement typically fall under the primary jurisdiction of a labor arbitrator, meaning you must proceed through your union's grievance process.
When should I involve a lawyer if I am facing workplace harassment?
You should speak with legal counsel as soon as you realize internal reporting mechanisms are failing, before you quit, or if you experience retaliation. Leaving a toxic workplace without legal guidance can jeopardize your ability to claim constructive dismissal or secure a severance package.
Is there a deadline to take legal action regarding workplace bullying?
You generally have two years from the date the harassment occurred (or the date you realized a claim could be made) to file a civil lawsuit in Ontario. However, filing union grievances or specific statutory complaints often involves much shorter deadlines, sometimes just days or weeks.
Common Scenarios
- An employee reports their direct supervisor to HR for repeated yelling and belittling in front of colleagues, and the employer responds by hastily dismissing the complaint without interviewing any of the witnesses the employee provided.
- A worker is subjected to an ongoing campaign of aggressive micro-management, unrealistic deadlines, and derogatory comments from a business owner, making the environment so emotionally taxing that they feel forced to resign.
- Shortly after raising concerns about a toxic workplace culture, an employee with a historically spotless record is suddenly placed on a restrictive and seemingly unattainable Performance Improvement Plan.
- A senior manager is investigated by an external third party and is subsequently fired for cause without a severance package because it was discovered they routinely intimidated and verbally abused junior staff.
What You Should Know
- Keep a detailed, private log of all harassment incidents, noting the date, time, location, witnesses present, exactly what was said or done, and the impact it had on you.
- Review your workplace’s harassment and violence policy to ensure you follow the correct internal reporting structure before escalating the matter externally.
- Always participate cooperatively if your employer launches a formal investigation into harassment, as refusing to answer an investigator's questions can negatively impact your legal standing.
- Do not resign in the heat of the moment due to an abusive supervisor; consult an employment lawyer first to strategically preserve your right to claim constructive dismissal.
- If unionized, immediately inform your union steward about the harassment, as your rights and remedies will be dictated by the specific timelines in your collective agreement.
Featured Cases
B. v. York Region District School Board
2026 ONSC 4153 (CanLII) · 2026-07-27Weber Exclusive Jurisdiction in School Board Harassment
This is a judicial review proceeding where the Divisional Court reviewed an application challenging the School Board's handling of a workplace harassment investigation. The court determined that the dispute arose from the interpretation and application of the collective agreement, granting exclusive jurisdiction to the Ontario Labour Relations Board under the Weber principle, thereby barring the court from hearing the matter.
B. v. Human Rights Tribunal of Ontario et al.
2026 ONSC 3624 (CanLII) · 2026-06-29Judicial Review: Human Rights Tribunal Employment Decision
This is a judicial review of a Human Rights Tribunal of Ontario decision regarding employment-related human rights complaints. The Divisional Court reviewed allegations of sex discrimination, a poisoned work environment, and reprisal in the context of the applicant's termination during a probationary period. The Court applied the Vavilov standard of reasonableness to the Tribunal's findings that the employer had valid, non-discriminatory reasons for termination and that the workplace environment allegations were unsubstantiated.
M. v. Department of National Defence
2025 ONSC 7256 (CanLII) · 2025-12-30M. v. DND: FPSLRA Bar on Harassment Claims
This is a procedural motion ruling in a wrongful dismissal and harassment case brought by a federal public sector employee against the Department of National Defence. The court addressed whether negligence and harassment claims were barred by the statutory grievance regime under the FPSLRA, characterizing them as employment disputes precluded from court action. Additionally, the court struck the plaintiff's claim for malicious prosecution due to insufficient pleadings and refused leave to amend.
C. v Edward Jones Investments
2025 ONSC 6699 (CanLII) · 2025-11-18Workplace Harassment Discovery Motion
This is an interlocutory motion concerning discovery in a workplace harassment case. The plaintiff sought to compel the defendant to answer undertakings and produce documents related to succession planning, employment files, and conflict of interest investigations, while also requesting a further examination of the defendant. The court considered the proportionality and relevance of these requests under the governing law on refusals motions.
M. v. Toronto Metropolitan University
2025 ONSC 4870 (CanLII) · 2025-09-04Judicial Review: University Harassment Decision
This is a judicial review application concerning a university's decision not to proceed with a complaint alleging harassment and discrimination against Jewish faculty members. The court applied Strickland factors to determine whether to exercise its discretion to decline review, considering the adequacy of alternative forums such as grievance procedures and human rights applications.
A. v. B.
2025 ONSC 4858 (CanLII) · 2025-08-25Workplace Harassment Jurisdiction: Weber Framework Application
This is a jurisdictional motion determining whether claims of workplace harassment, defamation, and intentional interference with economic relations fall under the exclusive jurisdiction of a Grievance Settlement Board or the courts. Applying the Weber v. Ontario Hydro framework, the court analyzed the essential character of the dispute based on the pleadings to determine if it arose from the collective agreement. Costs were awarded to the successful party on a motion to dismiss for lack of jurisdiction.
W. v. VAC Developments Limited
2024 ONCA 713 (CanLII) · 2024-09-26W. v. VAC Developments: Defamation Claim Dismissed
This was an appeal to the Court of Appeal from a motion judge's decision dismissing the employer's counterclaim for defamation. The employee, laid off after reporting racist threats at work, spoke to the media about the employer's failure to address the threats. The employer sued for defamation, and the employee brought an anti-SLAPP motion which was granted. The Court of Appeal dismissed the employer's appeal because the employer failed to show sufficiently serious harm to outweigh the public interest in protecting the employee's expression.
M. v. Lafarge et al.
2024 ONSC 3790 (CanLII) · 2024-07-10This is a proceeding involving a claim of sexual harassment. The court addressed a motion for summary judgment under Rule 20.04 regarding the harassment allegations and potential damages.
General Motors of Canada Company v. O.-A.
2023 ONSC 1723 (CanLII) · 2023-03-14Workplace Harassment: Interlocutory Injunction Granted
This is an interlocutory proceeding where the plaintiff sought an injunction to protect employees and contractors from trespassing, harassment, and threats by the defendant. The court found a serious issue to be tried and that irreparable harm, including physical and psychological harm, was likely, leading to the granting of an injunction under the Occupational Health and Safety Act and the Courts of Justice Act.
S.-N. v. Rubin Thomlinson LLP
2023 ONCA 86 (CanLII) · 2023-02-08Appeal Dismissed in Defamation Claim Over Harassment Report
This is an appeal to the Court of Appeal from an order granting the respondents' motion to dismiss the appellant's defamation action under the anti-SLAPP provisions (s. 137.1 of the Courts of Justice Act). The appellant, a medical resident, had sued the respondent workplace investigator over executive summaries that concluded her sexual harassment complaints were unproven and found her not credible. The motion judge dismissed the action, finding the summaries related to a matter of public interest, were protected by qualified privilege, lacked evidence of malice, and that the balancing test favoured protecting the expression. The Court of Appeal dismissed the appeal, holding that the reports on the investigation into a public educational institution regarding harassment and patient safety concerns engaged the public interest and were protected by qualified privilege.
O. v. Universal Structural Restorations Ltd.
2022 ONSC 6979 (CanLII) · 2022-12-09Constructive Dismissal: Abusive Workplace & Human Rights Violations
This is a merits decision in a wrongful dismissal case where the plaintiff alleged constructive dismissal due to an abusive workplace environment, including harassment and unsafe conditions. The court found that the employer's failure to address these issues created a poisoned work environment, establishing constructive dismissal, battery, assault, and human rights violations, and awarded damages accordingly.
H. v. Ontario
2022 ONCA 11 (CanLII) · 2022-01-12H. v. Ontario: Workplace Harassment and Charter Claims
This is an appeal to the Court of Appeal from a motion judge's decision dismissing the employee's action against the Crown. The employee sued the Crown, alleging it was responsible for harassment and threats she suffered while working at a public hospital, and for the failure of various administrative tribunals to support her claims. The motion judge dismissed the action, finding that the Crown is not vicariously liable for the employment issues of public hospitals or the decisions of administrative tribunals. The Court of Appeal agreed and dismissed the appeal, concluding there was no viable cause of action pleaded against the Crown.
C. v. Ottawa (City of)
2021 ONSC 8256 (CanLII) · 2021-12-22This is a judicial review application concerning the jurisdiction and procedural fairness of the City of Ottawa's Integrity Commissioner. The applicant challenged the Commissioner's investigation into complaints of sexual harassment, arguing a lack of jurisdiction under the Municipal Act, 2001, and alleging bias and a denial of procedural fairness. The Divisional Court reviewed whether the Commissioner acted within their statutory authority and whether the investigation met the standards of natural justice.
United Food and Commercial Workers Union, Local 175 v. Copper River Inn and Conference Centre
2021 ONSC 5058 (CanLII) · 2021-07-19This is a judicial review of a labour arbitration award where the union challenged the arbitrator's decision regarding the employer's failure to investigate a workplace sexual assault. The Divisional Court examined whether the arbitrator's award of nominal damages and failure to address statutory breaches under the Ontario Health and Safety Act and Ontario Human Rights Code were unreasonable under the Vavilov framework.
C. v. The Toronto Catholic District School Board
2021 ONSC 3110 (CanLII) · 2021-04-28C. v. TCDSB: Exclusive Arbitration Jurisdiction
This is an interlocutory proceeding determining whether the court has jurisdiction to hear claims of workplace harassment, discrimination, and defamation, or if they must be resolved through mandatory arbitration under the collective agreement. The court applied the Weber principles to confirm that disputes arising from the interpretation and application of the collective agreement, including those involving workplace policies and employee conduct, fall under the exclusive jurisdiction of the arbitrator.
D.F. v. Toronto Parking Authority
2021 ONSC 1695 (CanLII) · 2021-03-08Workplace Sexual Assault: Labour Arbitrator Jurisdiction
This is a jurisdictional decision determining whether a unionized employee's claims for workplace sexual harassment and assault fall within the exclusive jurisdiction of a labour arbitrator under the Labour Relations Act. The court affirmed that such claims arise from the collective agreement and do not violate the Charter, finding no remedial gap in the arbitration process.
M & P Tool Products v. L.
2020 ONSC 8000 (CanLII) · 2020-12-23Summary Judgment: Fraud, Fiduciary Duty & Harassment
This is a procedural ruling on a motion for partial summary judgment in a dispute between an employer and a former employee. The plaintiff sought judgment for civil fraud and breach of fiduciary duty, while the defendant raised a counterclaim for workplace harassment and a defence of condonation. The court considered whether the written record allowed for a fair determination of credibility issues, particularly regarding the harassment counterclaim and the defence of condonation.
Ottawa Carleton Standard v. F.
2019 ONSC 3899 (CanLII) · 2019-06-28Workplace Harassment: OHSA Duty in Condominium
This is an interlocutory proceeding involving a condominium corporation, addressing whether a defendant's conduct constituted workplace harassment under the OHSA and breached the Condominium Act. The court considered the statutory duty of condominium corporations to protect workers from harassment and whether an interlocutory injunction should be granted to prohibit the defendant from communicating with personnel.
Colistro v. Tbaytel
2019 ONCA 197 (CanLII) · 2019-03-13Colistro v. Tbaytel: Constructive Dismissal & Honda Damages
This is an appeal to the Court of Appeal from a trial judge's decision regarding constructive dismissal and intentional infliction of mental suffering. The employee, an executive assistant with nearly twenty years of service, went on stress leave and objected after her employer rehired a former supervisor who had previously been fired for sexually harassing her. The trial judge dismissed the employee's claim for intentional infliction of mental suffering but found she was constructively dismissed, awarding 12 months' notice and $100,000 in Honda damages for bad faith. The Court of Appeal dismissed the employee's appeal and the employer's cross-appeal. The Court upheld the trial judge's findings that a single egregious act can make employment intolerable, leaving the 12 months' notice and $100,000 Honda damages awards in place.
Ontario Public Service Employees Union v. The Crown in Right of Ontario
2019 ONSC 1077 (CanLII) · 2019-02-21Judicial Review: WSIA Jurisdiction and Harassment Damages
This is a judicial review of a Grievance Settlement Board decision regarding workplace bullying and harassment under a collective agreement. The Divisional Court examined whether the Board had jurisdiction to award damages for mental stress injuries compensable under the Workplace Safety and Insurance Act (WSIA) and whether its reliance on WSIAT decisions was reasonable. The Court found the decision reasonable and declined to consider new arguments raised for the first time on judicial review.