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Find a Lawyer » Canada Legal Guides » Ontario Legal Guides » Work & Employment Rights Ontario » Workplace Discrimination & Human Rights Ontario » How Long Do Ontario Employers Have to Investigate Harassment Claims?

How Long Do Ontario Employers Have to Investigate Harassment Claims?

12 Jun 2026 5 min read No comments Workplace Discrimination & Human Rights Ontario
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In Ontario, employers are legally required under the Occupational Health and Safety Act (OHSA) guidelines to complete a workplace harassment investigation within 90 days. Failure to investigate promptly can lead to severe Ministry of Labour orders, massive corporate fines, and human rights complaints.

Understanding Harassment Investigation Timelines in Ontario

When a formal complaint of workplace harassment or discrimination is filed, the clock immediately starts ticking. Under the Ontario Occupational Health and Safety Act (OHSA) and the Ontario Human Rights Code, employers cannot simply sweep allegations under the rug. Whether your business is a bustling tech firm in Toronto, a manufacturing plant in Mississauga, or a retail store in Ottawa, providing a safe and respectful work environment is your fundamental legal duty.

Ignoring a complaint or dragging out the investigation process creates a toxic work environment and severely damages employee mental health. 💔 Furthermore, a delayed response exposes your company to massive legal liability. If an employee feels their complaint of sexual harassment or racial discrimination is being ignored, they may escalate the matter to the Human Rights Tribunal of Ontario (HRTO) or claim constructive dismissal in civil court.

To protect your workforce and your business, it is crucial to understand exactly how long you have to act. The Ministry of Labour, Immigration, Training and Skills Development explicitly expects investigations to be objective, thorough, and completed within a strict timeframe. Let us break down the exact steps you need to follow to stay compliant.

Step-by-Step Investigation Process in Ontario

Conducting a rigorous workplace investigation requires careful planning and flawless execution. Most Ontario employers follow these standardized steps to ensure fairness for both the complainant (the person making the claim) and the respondent (the person accused).

Step 1: Acknowledge and Assess the Complaint

The moment an HR representative or manager receives a complaint, they must acknowledge it in writing immediately. You must first assess if immediate safety measures are necessary. If the allegations involve physical violence or severe sexual harassment, you may need to temporarily suspend the respondent (with pay) or alter shift schedules in cities like London or Hamilton to keep the parties separated while the investigation begins.

Step 2: Appoint a Qualified Investigator

You must decide whether to use an internal HR professional or hire an external workplace investigator. 🔍 For complex cases, allegations against senior executives, or severe human rights violations, hiring an external, neutral lawyer or licensed investigator is strongly recommended. This prevents any perception of bias and ensures the final report will hold up if scrutinized by the Ministry of Labour or the HRTO.

Step 3: Conduct the Interviews

The investigator must interview the complainant first to gather all details, dates, and potential witnesses. Next, the investigator interviews the respondent, giving them a fair opportunity to respond to every single allegation. Finally, any relevant witnesses are interviewed. All parties must be reminded of strict confidentiality and that any retaliation against participants is a serious legal offence.

Step 4: Draft the Final Report and Notify the Parties

Once all evidence is weighed on a “balance of probabilities,” the investigator writes a comprehensive report detailing their findings. 📝 The employer must then review the report and decide on corrective actions. Under the OHSA, the employer is legally obligated to inform both the complainant and the respondent, in writing, of the investigation’s results and any disciplinary actions taken, marking the formal end of the process.

How Much Does an Investigation Cost in Ontario?

Budgeting for a workplace investigation is essential for Ontario business owners. While internal investigations cost only your HR staff’s time, external investigations carry specific price tags:

  • External Investigator Fees: Hiring a specialized lawyer or licensed private investigator typically costs between $300 and $600 CAD per hour. A standard investigation usually ranges from $5,000 to $15,000 CAD, while highly complex, multi-witness cases can exceed $30,000 CAD.
  • Legal Counsel: You may need an employment law firm to advise you on how to implement the investigator’s recommendations (e.g., terminating the respondent for cause). This consultation usually costs between $350 and $700 CAD per hour.
  • Paid Suspensions: If you place the respondent on an administrative leave during the process, you must continue to pay their regular salary and benefits.
  • Fines for Non-Compliance: If the Ministry of Labour finds you failed to investigate properly, corporate fines can reach up to $1,500,000 CAD, and directors can face individual fines up to $100,000 CAD and potential jail time.

How Long Does the Process Take?

According to the Ontario Ministry of Labour’s Code of Practice, a workplace harassment investigation must be completed within 90 days. This 90-day window starts the day the employer becomes aware of the incident or receives the formal complaint. This timeframe includes conducting all interviews, drafting the final report, and providing the written summary of results to the involved workers.

However, there are rare exceptions. 🕙 The 90-day deadline can only be extended if there are extenuating circumstances. Examples include a key witness being on an extended medical leave, or the police conducting a concurrent criminal investigation into an assault. If a delay is necessary, the employer must communicate the reasons clearly to both the complainant and the respondent and provide a revised timeline.

Internal vs. External Investigators

Choosing the right person to lead the investigation is critical. Here is a comparison to help Ontario employers decide:

FeatureInternal HR InvestigatorExternal Lawyer / Investigator
CostLow (part of regular payroll).High ($5,000 – $30,000+ CAD).
Best Used ForMinor disputes, bad language, clear-cut policy violations.Sexual harassment, systemic racism, C-suite executive misconduct.
Perception of BiasHigh risk, especially if HR reports to the accused manager.Low risk; entirely neutral third party.
Legal PrivilegeUsually not protected by solicitor-client privilege.Can sometimes be structured to maintain legal privilege.

Frequently Asked Questions (FAQ)

What happens if the 90-day deadline is missed?

If an employer fails to complete the investigation within 90 days without a valid reason, an employee can file a complaint with the Ministry of Labour. A Ministry Inspector can step in, issue compliance orders, and legally force the company to hire an impartial external investigator at the company’s sole expense.

Can an employee refuse to participate in the investigation?

Generally, employees have a duty to cooperate in a legitimate workplace health and safety investigation. However, if they refuse, the investigator must still proceed based on the available evidence. Employers should consult an employment lawyer before disciplining a victim who is too traumatized to participate.

Do we have to give the full investigation report to the complainant?

No. Under the OHSA, you are only required to provide a written summary of the findings and the corrective actions that have been taken or will be taken. Providing the entire unabridged report can violate the privacy rights of witnesses and the respondent.

Can the accused employee have a lawyer present during interviews?

In a non-unionized environment, there is no automatic legal right for an employee to have a lawyer present during an internal interview, though employers may allow it to ensure fairness. In a unionized workplace, the employee almost always has the right to have a union steward present.

Is workplace gossip considered harassment?

It depends on the nature of the gossip. If the rumours are malicious, ongoing, or target a person based on a protected ground under the Human Rights Code (like their sexual orientation or religion), it absolutely qualifies as workplace harassment and must be investigated.

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