Ontario employers face strict obligations under OHSA and the Human Rights Code when harassment occurs. This guide covers your legal duties, investigation requirements, policy mandates, and practical steps to protect your organization.
Workplace harassment in Ontario is not a soft HR issue — it is a legal obligation with real financial consequences. Every Ontario employer, regardless of size, must have a harassment policy, a complaint mechanism, and the capacity to investigate. Failure to act exposes your organization to Ministry of Labour orders, Human Rights Tribunal claims, and constructive dismissal lawsuits.
This guide gives you the complete picture: what the law requires, what triggers an investigation, and how to build a process that protects both your people and your organization.
Three pieces of legislation define your obligations around workplace harassment in Ontario.
Occupational Health and Safety Act (OHSA). Since Bill 168 took effect in 2010, OHSA requires every employer with more than five workers to maintain a written workplace harassment policy, review it annually, and establish a program that includes a complaint mechanism, investigation procedures, and a process for informing parties of the outcome. OHSA s.32.0.1 through s.32.0.8 lay out these requirements in detail.
Ontario Human Rights Code. The Code prohibits harassment based on protected grounds — race, sex, disability, creed, sexual orientation, gender identity, and others. Unlike OHSA, the Code covers harassment linked to specific characteristics and provides a direct complaint mechanism through the Human Rights Tribunal of Ontario (HRTO). Damages under the Code are uncapped for lost wages and can include significant awards for injury to dignity.
Bill 132 (Sexual Violence and Harassment Action Plan Act, 2016). This amendment strengthened OHSA's sexual harassment provisions. It expanded the definition of workplace sexual harassment to include sexual solicitation by someone in a position to confer or deny a benefit, required employers to investigate all harassment incidents and complaints, and gave Ministry of Labour inspectors authority to order independent investigations at the employer's cost.
The practical implication: you cannot choose whether to investigate. When a complaint is made — or when you become aware of conduct that may constitute harassment — the law requires action.
Considering external support? Review our employer-side Ontario workplace investigation fit and process. The page explains intake boundaries and acceptance gates; it does not make a legal determination about a particular complaint.
OHSA defines workplace harassment 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." This is deliberately broad. Courts and tribunals have found harassment in conduct ranging from persistent micromanagement and exclusion to overt threats and slurs.
Examples that consistently meet the threshold:
Repeated demeaning comments about a worker's competence, appearance, or background. Deliberate isolation — excluding someone from meetings, communications, or social events connected to work. Intimidation through yelling, aggressive posturing, or implied threats to job security. Spreading rumours or making false accusations. Unwanted physical contact or sexual advances. Cyberbullying through email, messaging platforms, or social media when connected to the employment relationship.
What does not typically constitute harassment:
Reasonable management actions — performance feedback, workload assignment, discipline for cause — delivered appropriately. A single disagreement or interpersonal conflict, unless it crosses into vexatious conduct. Differences of opinion expressed professionally.
The line between firm management and harassment is contextual. That is exactly why documentation matters from the start — and why investigation becomes necessary when facts are disputed.
Ontario workplace harassment law imposes five non-negotiable obligations on employers. Missing any one creates legal exposure.
1. Written harassment policy. OHSA s.32.0.1(1) requires a written policy that is reviewed at least annually and posted in a conspicuous location. The policy must address both general workplace harassment and workplace sexual harassment. It is not optional, and "we have an employee handbook" does not satisfy the requirement unless it contains a standalone, compliant workplace harassment policy.
2. Harassment program. Beyond the policy, s.32.0.6 requires a program that includes measures and procedures for workers to report incidents, sets out how the employer will investigate complaints and incidents, specifies how the employer will inform the complainant and respondent of the investigation results, and includes information about how complaints can be made to the Ministry of Labour or the HRTO.
3. Duty to investigate. When you receive a complaint or become aware of an incident, you must investigate. This obligation is triggered by both formal written complaints and informal reports — including situations where no formal complaint is filed but management has knowledge of potential harassment. The Metrolinx line of decisions — Divisional Court (2024), upheld on appeal (2025) — confirmed that the duty exists even absent a formal complaint. Understanding how to report workplace harassment is critical for building systems that surface complaints early and trigger timely investigation.
4. Protection from reprisal. OHSA s.50 prohibits reprisal against workers who report harassment, participate in investigations, or exercise their rights under the Act. Reprisal includes termination, demotion, discipline, or any adverse change to working conditions. The penalty for reprisal can be more severe than the underlying harassment itself.
5. Annual policy review. Your harassment policy must be reviewed at least annually and updated to reflect changes in legislation, case law, or organizational structure. This is not a formality — the Ministry of Labour can ask for evidence of your review process during an inspection.
Not every interpersonal complaint requires a formal investigation. But the threshold for "must investigate" is lower than most employers assume.
Always investigate when:
The complaint alleges harassment as defined under OHSA or the Human Rights Code. The conduct involves sexual harassment or sexual solicitation. There is a power imbalance between the parties (manager-subordinate, client-employee). The alleged conduct, if proven, could result in termination or serious discipline. Multiple complaints involve the same respondent. The complainant has filed or threatens to file an external complaint (HRTO, Ministry of Labour). You become aware of potential harassment even without a formal complaint.
Consider alternatives (mediation, facilitated conversation) when:
The conduct is interpersonal conflict without a harassment dimension. Both parties are willing to participate in resolution. The conduct is a one-time event with no power imbalance. There is no allegation of discrimination or sexual harassment.
When in doubt, investigate. The cost of an unnecessary investigation is a fraction of the cost of defending an allegation that you failed to investigate when you should have.
A credible investigation follows a consistent, documented process — one an independent reviewer can follow from evidence to findings. Courts and tribunals evaluate not just whether you investigated, but how. Our employer-side Ontario workplace investigation process explains how a potential external mandate is screened, scoped and assigned.
Step 1: Intake and assessment. Receive the complaint, assess urgency, and determine whether interim measures are needed (separation of parties, temporary reassignment, leave). Do not make conclusions at intake. Document everything from the first conversation.
Step 2: Select your investigator. For straightforward complaints with no power imbalance, a trained internal HR professional may suffice. For complaints involving senior leadership, sexual harassment, or potential termination, retain an external investigator. The investigator must be impartial — no prior relationship with either party, no reporting line to the respondent, no stake in the outcome.
Step 3: Define scope and terms of reference. What specific allegations are being investigated? What policies and legislation apply? What is the timeline? Document these in writing before interviews begin.
Step 4: Conduct interviews. Interview the complainant first, then the respondent, then witnesses. Use open-ended questions. Record detailed notes. Provide the respondent with the substance of the allegations and a fair opportunity to respond — procedural fairness requires this.
Step 5: Gather and analyze evidence. Collect documents, emails, messages, access logs, video footage, and any other relevant evidence. Assess credibility where accounts conflict. Apply the balance of probabilities standard — the same standard used by tribunals and courts.
Step 6: Report findings. The investigation report should state the allegations, summarize the evidence, assess credibility, and reach conclusions on each allegation. It should not recommend discipline — that decision belongs to management.
Step 7: Communicate outcomes. Inform both the complainant and respondent of the findings and any corrective action. OHSA requires this. You do not need to disclose the full report, but you must communicate the outcome.
Step 8: Implement corrective action and follow up. If harassment is substantiated, take proportionate corrective action. Monitor the workplace to prevent recurrence. Document the follow-up.
The same errors show up repeatedly across Ontario investigations.
Delaying the investigation. Every week of delay strengthens a claim that the employer failed to take the complaint seriously. Courts expect prompt action — typically initiation within days, not weeks.
Using an untrained investigator. Assigning an investigation to a manager with no investigation training creates procedural fairness issues that can invalidate the entire process. Investigators need training in interview techniques, evidence assessment, credibility analysis, and report writing.
Failing to separate the parties. Allowing the complainant and respondent to continue working in close proximity during an investigation creates risk of further harm, witness contamination, and reprisal allegations.
Skipping the respondent's right to respond. Procedural fairness requires that the respondent know the substance of the allegations and have a meaningful opportunity to respond. Reaching conclusions without this step is a fatal flaw.
Treating the investigation as a check-the-box exercise. A sloppy, superficial investigation is worse than no investigation in some ways — it creates a record that shows you knew about the issue but handled it carelessly. To understand the rigorous approach required, see our detailed harassment investigation guide.
The financial exposure from mishandled workplace harassment in Ontario is substantial and growing.
OHSA penalties. Fines that run to six figures for individuals and seven figures for corporations, plus potential imprisonment — confirm current maximums under section 66 of the OHSA.
Human Rights Tribunal damages. General damages for injury to dignity — uncapped, and set case by case. Lost wages (uncapped). Reinstatement orders. For a sense of scale, see the public decisions we cover, including the $137,689 award in N.M. v. C.T..
Civil litigation. Constructive dismissal claims where harassment created an intolerable work environment. Aggravated and punitive damages for bad faith conduct. Legal costs for both prosecution and defence.
Operational costs. Turnover of affected employees and witnesses. Productivity loss during and after the investigation. Reputational damage in your industry and talent market.
The math is straightforward: a properly conducted external investigation is quoted after intake, based on the number of parties, evidence volume, urgency, jurisdiction, and reporting scope — see our investigation cost guide. A mishandled situation costs many multiples of any properly run investigation in legal exposure, settlements, and operational disruption.
1205 accepts enquiries about employer-side Ontario workplace matters. Some matters require employment counsel, particularly where legal advice, litigation strategy, or potential privilege is central. Others may call for independent fact-finding. The appropriate role must be confirmed at intake.
Review our workplace investigation fit and process before sharing sensitive information. We reply to enquiries within one business day. A matter is accepted only after fit, conflicts, jurisdiction, the proposed practitioner's authorization and insurance, and capacity are confirmed. If accepted, the written scope identifies the proposed practitioner, role, method, reporting responsibility, timing, and fee. The enquiry itself does not promise a call, proposal, start date, or mandate.
This guide is general information, not legal advice — statutory requirements and penalties change, so confirm current requirements under the OHSA and involve employment counsel where the stakes warrant it.
Review the employer-side Ontario workplace investigation fit and process.
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Employer-side workplace investigation support for Canadian organizations, subject to matter-level conflict, independence, jurisdiction, authorization, insurance, language, privacy, fit, and capacity review.
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