OHSA Investigation Obligations: Ontario Checklist 2026
Your OHSA obligations as an Ontario employer when a workplace incident requires investigation — what to do, by when, and where to document.
Post-investigation steps for Ontario employers: communicating findings, remediation planning, and preventing retaliation claims.
The investigation is complete. The report lands on your desk. The fee your provider quoted at intake has been paid. And then... silence.
This is where many organizations fail. For a complete overview of investigation types and when they're required, see our Complete Guide to Workplace Investigations in Ontario.
The investigation report is not the end of the process. It's the pivot point. What happens in the 30 days after you receive that report determines whether you've solved the problem or planted seeds for litigation, retaliation claims, and cultural breakdown.
Here's what needs to happen next, and in what order.
Before you tell anyone anything, you need to understand what you're legally permitted to disclose.
What you CAN communicate:
What you CANNOT communicate:
Under Ontario law: The OHSA requires that the complainant — and the respondent, if they are a worker of the employer — be informed in writing of the results of the investigation and any corrective action. The Ministry is explicit that the "results" are a summary of findings, not the full report. Beyond that minimum, your communication needs to be factual and consistent with your duty to investigate in good faith and act on findings.
The problem many organizations face: they either over-communicate (creating legal exposure) or under-communicate (allowing rumors and resentment to fester). The right approach is transparent facts, carefully bounded.
Considering external support for an Ontario employer-side matter? Review our workplace investigation fit and acceptance process. It explains the screening and delivery boundaries; it does not determine legal obligations or predict cost for a specific matter.
Timing is the message here. If the investigation found misconduct and you're not taking action within days, you're signaling that the findings don't matter. Employees lose faith in the process.
What "implementing discipline" means:
Critical: Timing matters more than severity. A one-week suspension imposed immediately looks proportionate and fair. A suspension imposed two months later looks vindictive and creates legal exposure.
For a detailed walkthrough of how to conduct the investigation itself, refer to our Workplace Investigation Process Guide for Ontario.
Document everything:
Under Ontario law, your documentation needs to demonstrate that the decision was:
The investigation found a problem. Discipline addresses the individual. Remediation addresses the culture and systems that allowed the problem to occur.
Remediation typically covers:
Reporting and accountability:
Training and awareness:
Systemic changes:
Before implementing remediation, verify that your investigation file can stand on its documentation by reviewing our 5 Signs Your Investigation Won't Hold Up in Court guide.
Accountability for leadership:
This is where 1205 stays engaged — as a separately scoped mandate. The investigation itself is limited to independent fact-finding and the agreed report; remediation, training, policy, or HR support is scoped separately after findings are delivered, and only where independence, fairness, and client counsel permit it. Many investigators hand off the report and step away; we take the second mandate when it's appropriate, because translating findings into actual change is what reduces legal and cultural risk. Under Ontario's OHSA and common law duty of care, investigations that uncover systemic problems without remediation can expose you to liability if the problem recurs.
This is the legal minefield.
Under the ESA, it is illegal to retaliate against an employee for making a workplace complaint. Under the OHSA, it's illegal to punish someone for reporting a health and safety concern. Retaliation includes:
What you need to do:
Retaliation claims can be easier to prove than the original complaint — under OHSA section 50, the employer carries a reverse onus — and Ontario adjudicators have awarded significant damages for reprisal. An employer who properly investigated harassment but then retaliates against the complainant has created a compounding liability.
The investigation disrupted normal operations. Relationships are strained. Employees are watching to see if management actually cares about fair treatment.
What rebuilding looks like:
This is the unglamorous part of the work. It's not sophisticated. But it's where you begin rebuilding the credibility that an investigation can disrupt. If your investigation used a trauma-informed methodology, preserve that attention to fairness and psychological safety during remediation. Keep post-investigation work separately governed so it does not blur the independence of the fact-finding mandate.
Every action you take after investigation needs to be documented and retained — many employers use a five-year minimum; confirm your retention obligations with counsel.
What to keep:
What NOT to keep:
Assume everything you document may eventually be read by an employment lawyer representing the employee — through litigation production if not otherwise. Document as if a judge will read it.
Here's where many organizations get it wrong: they hire someone to investigate, get a report, and think the problem is solved. Then they either over-react (harsh discipline that looks punitive) or under-react (no consequences, no change).
The organizations that actually solve problems do investigation and remediation as an integrated process:
This is the difference between investigation as a "cover your ass" check-the-box process and investigation as a genuine problem-solving tool.
At 1205, the investigation mandate is limited to independent fact-finding and the agreed report. But where independence, fairness, and client counsel permit it, we take separately scoped mandates through the aftermath: discipline decisions grounded in the documented findings, remediation that actually changes behavior, and culture rebuild after disruption. That's the work that reduces the odds of a repeat — and of the litigation that follows one — and keeps people wanting to work for you.
If your organization has completed an investigation and isn't sure what happens next, let's talk. We help employers move from "investigation complete" to "problem solved."
Part-time HR leadership and employee-relations capacity for employers with Ontario operations, subject to practitioner availability and a written scope.
Employer-side external fact-finding for Ontario workplace matters, accepted only after fit, jurisdiction, conflict, competence, and capacity review.
Scoped strategy and execution support brought into a business-performance mandate when the required leadership and capacity are confirmed.
Your OHSA obligations as an Ontario employer when a workplace incident requires investigation — what to do, by when, and where to document.
Federal employer obligations under Bill C-65 in 2026 — investigation triggers, timelines, trained investigator rules, and what tribunals expect.
Ontario employers: OHSA Section 32 and the Human Rights Code require you to investigate harassment complaints. Know your legal obligations.
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