How to Conduct a Workplace Harassment Investigation in Ontario

When an employee comes forward with a complaint of discrimination or harassment, how your business responds is heavily scrutinized under Ontario law. 📝 From bustling tech firms in Waterloo to manufacturing warehouses in Hamilton, every employer is legally bound to take complaints seriously. Conducting a fair, impartial, and prompt workplace harassment investigation is not optional; it is a statutory obligation designed to protect the psychological health and safety of your workers.

As of May 2026, the legal landscape surrounding workplace investigations in Ontario is incredibly strict. Mishandling an investigation-such as showing bias, breaching confidentiality, or failing to interview key witnesses-can expose your company to massive liability. This guide provides a clear, step-by-step framework to ensure your internal HR investigations meet the rigorous standards set by the Ministry of Labour and the Ontario Human Rights Commission (OHRC).

Step-by-Step Process in Ontario

Whether your business operates in Toronto, Brampton, or London, the core principles of procedural fairness must be upheld. 📍 Most employers choose to rely on standardized investigation protocols or seek counsel from an employment law firm before taking disciplinary action.

Step 1: Receive the Complaint and Implement Interim Measures

The moment a complaint is received, you must assess if any immediate danger exists. If the allegations involve severe sexual harassment or threats of workplace violence, you may need to implement interim measures. This could involve temporarily relocating one of the employees, modifying shift schedules, or placing the respondent (the accused) on a non-disciplinary paid administrative leave while the investigation takes place.

Step 2: Determine the Scope and Appoint an Investigator

You must decide who will conduct the investigation. 👤 The OHSA requires the investigator to be impartial. If the complaint is against a junior employee, a trained internal HR manager is usually sufficient. However, if the complaint involves senior management, the business owner, or complex human rights violations, hiring a neutral external investigator (such as a lawyer) is heavily recommended to avoid claims of bias.

Step 3: Interview the Complainant

The investigation officially begins by interviewing the person who filed the complaint. The investigator must ask open-ended questions to gather all relevant details: who, what, when, where, and how. The complainant should be asked to provide any supporting evidence, such as emails, text messages, or a list of potential witnesses. The investigator must document this interview thoroughly.

Step 4: Interview the Respondent

Procedural fairness dictates that the respondent has the right to know the specific allegations against them and be given a fair opportunity to respond. 💼 During their interview, present the allegations clearly and allow them to share their side of the story. They, too, should be given the chance to provide evidence and identify their own witnesses.

Step 5: Interview Witnesses and Gather Evidence

Next, the investigator must interview any relevant witnesses identified by both parties. Witnesses should only be told the minimum amount of information necessary to ask them relevant questions, thereby maintaining confidentiality. The investigator will also review physical evidence, such as CCTV footage, internal communications, or employment records.

Step 6: Draft the Final Report and Inform the Parties

Once all evidence is weighed on a “balance of probabilities,” the investigator drafts a final report outlining their factual findings. 📄 Finally, under the OHSA, the employer is legally mandated to inform both the complainant and the respondent, in writing, of the results of the investigation and any corrective action that has been or will be taken.

How Much Does it Cost in Ontario?

The financial impact of a workplace investigation depends heavily on whether you handle it internally or hire outside professionals. 💰

• Internal Investigation: Generally free beyond the standard salary costs of your HR staff and the paid time for employees to attend interviews.
• External Investigator Fees: Hiring an Ontario employment lawyer or licensed workplace investigator typically costs between $300 and $600 CAD per hour. A complete investigation report can easily range from $10,000 to $25,000 CAD.
• Ministry of Labour Fines: Failing to conduct an appropriate investigation can lead to corporate fines exceeding $1,000,000 CAD.
• Legal Settlements: If an employee successfully proves constructive dismissal due to a toxic workplace, severance and HRTO damages can cost an employer tens of thousands of dollars.

How Long Does the Process Take?

Ontario employers cannot let complaints languish. The Ministry of Labour expects investigations to be completed swiftly. 🕑

• Statutory Guideline: The Ministry of Labour generally expects a workplace investigation to be completed within 90 days of the complaint being filed.
• Initial Response: Interim measures and appointing an investigator should occur within 1 to 3 business days.
• Interviews and Reporting: Depending on the number of witnesses, the active investigation and drafting of the report usually takes 3 to 6 weeks.

Frequently Asked Questions (FAQ)

Author: lawyerinfo.ca