When a harassment or code-of-conduct complaint lands on your desk, the first question after "What happened?" is usually "How much is this going to cost?" The answer is rarely simple. Workplace investigation cost in Ontario depends on investigation complexity, scope, investigator credentials, and what outcome you're trying to achieve. Most employers have no idea whether they're looking at a $5,000 process or a $50,000 one until they've already committed to a path.
This matters because investigation costs feed directly into your decision about whether to investigate at all—and that decision has massive legal consequences. Under OHSA Section 32.0.7, you don't get to opt out. The Ontario Ministry of Labour enforces the obligation to investigate workplace harassment complaints, and the cost of non-compliance far exceeds the cost of doing it right.
Cost Ranges by Investigation Type
The broadest breakdown comes down to complexity. Most workplace investigations in Ontario fall into three categories, and each has a predictable cost range.
Single-complaint investigations typically run $5,000 to $15,000. These are straightforward: one person makes a specific allegation against one respondent. You have a few witnesses to interview, a handful of documents to review, and a clear timeline. An experienced investigator can move through this in two to three weeks. There's no systemic complexity, no historical pattern to uncover, no regulatory trigger beyond OHSA compliance. These investigations are common—a disagreement between two team members, a one-off inappropriate comment, a management misstep with limited ripple effect. The investigation is defensible, the process is clean, and the cost is controlled.
Moderate-scope investigations range from $15,000 to $30,000. Here you have multiple complainants or multiple respondents, a longer timeline to examine, or allegations that touch on multiple policies. These investigations take longer because the witness pool is larger and cross-examination becomes necessary. A single allegation may have expanded to involve team dynamics, power imbalances, or patterns of behavior. You're looking at four to six weeks of work, more document review, and more complex analysis because contradictions emerge across interviews. This is where most complex workplace harassment cases land—allegations involving retaliation, ongoing conduct, or group dynamics that require thorough exploration.
Complex systemic investigations exceed $30,000 and often reach $50,000 or beyond. These are deep-dive examinations of organizational culture, historical patterns, or multiple distinct allegations across departments. You might be investigating alleged systemic harassment, looking at a toxic team culture, or examining allegations that touch on protected grounds under the Human Rights Code. These investigations require senior investigators with specialized expertise, demand extensive document review, and often involve sensitive topics that need careful handling. They take eight weeks or more and generate substantial reports with detailed findings and remediation recommendations.
The cost difference isn't arbitrary. It reflects the investigator's time, expertise required, and the complexity of analysis needed to reach defensible conclusions.
What Drives Investigation Costs Up
Beyond the category, specific factors directly influence your total bill. Understanding these helps you anticipate cost and scope realistically.
Number of witnesses is the primary cost driver. Each interview takes time. An investigator typically needs 60 to 90 minutes per witness for a substantive interview, plus time for follow-up questions and document review before each conversation. A five-witness investigation doubles the cost of a two-witness one. If you have 15 witnesses, you're looking at 15-20 hours of interviews alone, plus analysis time. The cost compounds when you need to interview people across multiple locations or conduct interviews outside regular business hours to ensure confidentiality.
Document volume and complexity also escalates costs significantly. An investigation touching emails, chat logs, scheduling systems, performance records, and external communications requires substantial review time. An investigator must read for context, identify relevant material, track timelines, and spot inconsistencies across sources. A case with 500 emails runs longer than one with 50. A case involving technical systems or specialized terminology requires investigators with that background knowledge—and specialists cost more. We've seen investigations where just organizing and cataloging documents takes 20+ hours.
Timeline pressure matters. If you need the investigation completed in two weeks instead of four, your investigator is operating at higher cost (potentially overtime or rushing other clients). Urgent investigations are legitimate when the situation is volatile or ongoing—when continued contact between parties risks escalation, or when regulatory bodies are already involved. But urgency carries a premium because it prevents the investigator from batching work efficiently.
Investigator credentials and experience significantly affect pricing. A junior HR professional conducting interviews might cost $150-250 per hour. An experienced independent HR investigator with COHRIA certification (Certified Ontario HR and Labour Relations Investigator) or similar credentials typically charges $250-400 per hour. Employment lawyers conducting investigations charge $400-800 per hour. Experience matters because complex cases need experienced judgment—credibility assessment, legal risk spotting, and defensible methodology aren't skills entry-level people develop quickly. A senior investigator moves through a case faster and produces a report less likely to be questioned at tribunal or MOL inspection.
Legal complexity is the wild card factor. If the case involves potential criminal conduct, employment standards violations, or human rights grounds, you may need legal review. If litigation is already threatened, you need a litigation-ready investigation. These escalate cost and timeline significantly. A case that starts as a simple complaint and reveals possible discrimination adds layers of complexity that existing investigators may not be qualified to handle.
Investigator Type: The Cost-Risk Tradeoff
Your choice of who conducts the investigation directly determines cost and risk profile.
Internal HR conducting the investigation appears free but rarely is. You pay opportunity cost (your HR person isn't handling other priorities), you risk credibility questions (is the investigator impartial?), and you risk legal exposure if the investigation doesn't meet professional standards. For routine cases, internal HR can work if someone has training and genuine independence from the respondent. For anything involving retaliation allegations, sensitive topics, or management layers where impartiality is questioned, internal investigation carries liability risk that makes external investigators cheaper by comparison. The cost of losing a tribunal case because your investigation was seen as biased dwarfs the cost of hiring an independent investigator upfront.
Independent HR investigators cost $200-400 per hour or flat-fee arrangements ($8,000-$25,000 depending on scope). They're trained in investigative methodology, understand OHSA and Human Rights Code requirements, and bring perceived neutrality that improves employee confidence in the process. They're also insurable—their professional liability covers investigation errors in a way your internal HR person's activities don't. For most Ontario employers, independent HR investigators deliver the best cost-value balance. They're experienced enough to move efficiently, credible enough to withstand tribunal scrutiny, and affordable enough that cost isn't a barrier to compliance.
Employment law firms charge $400-800 per hour, which escalates quickly. You're paying for legal training, litigation experience, and privilege considerations. Law firms are necessary when litigation is already underway or when legal risk is genuinely high. Using a law firm for a routine complaint is like hiring a litigation team to write a standard lease—it's overkill and expensive. However, when complexity spikes (human rights allegations, criminal conduct, regulatory involvement), legal expertise becomes essential and the premium is justified.
The hybrid approach uses an independent HR investigator for fact-finding with legal counsel reviewing for privilege, risk, and litigation strategy. This is often the most efficient path when legal exposure exists. You get investigative efficiency at mid-market rates plus legal risk assessment at lower cost than full-service law firm investigation.
The Real Cost of Not Investigating
The cost of a thorough investigation seems high until you compare it to the cost of ignoring complaints or running a sloppy process.
OHSA penalties are substantial. The Ministry of Labour can issue orders to investigate, and non-compliance draws fines up to $100,000 for individuals and $1.5 million for corporations. An employer who fails to investigate a documented harassment complaint faces regulatory action that dwarfs investigation costs. Beyond fines, a compliance order requires you to hire an investigator anyway—but now you're operating under regulatory scrutiny with the MOL reviewing your work.
Human Rights Tribunal of Ontario (HRTO) awards typically range from $25,000 to $200,000 depending on harm and behavior. A complainant can file at HRTO if they believe discrimination or harassment based on protected grounds wasn't properly investigated—and a sloppy investigation strengthens their case. The tribunal considers investigation quality as evidence of bad faith or willful blindness. A complaint that could have been resolved for $15,000 becomes a $100,000 tribunal award when the investigation process was inadequate.
Wrongful dismissal liability emerges when investigations lead to termination. If your investigation process was flawed, a terminated employee's wrongful dismissal case becomes much stronger. Defending a wrongful dismissal claim costs $50,000-$150,000 in legal fees alone, plus potential damages that can reach $100,000+. A properly conducted investigation provides defensible grounds; a rushed one creates litigation risk that far exceeds the upfront investigation cost.
Reputational damage affects recruiting and retention. Employees who witness a mishandled complaint or inadequate response to harassment begin looking for new jobs. Your best people leave. Workplace culture deteriorates. The downstream cost to engagement, productivity, and retention is substantial but rarely quantified. In tight labor markets, the cost to replace talented employees often exceeds six months of salary.
Ongoing liability compounds when you don't address root causes. An investigation that identifies systemic issues but triggers no remediation leaves the organization exposed to repeated complaints, escalating severity, and compounding liability. You're essentially allowing the problem to grow while documenting it, which looks worse at tribunal than addressing it proactively.
A $12,000 investigation completed properly protects you from penalties, tribunal awards, and litigation costs that easily exceed $100,000. The ROI on proper investigation is substantial.
How 1205 Consulting Prices Investigations
We believe investigation costs should be predictable, not open-ended. We typically work on flat-fee or capped-fee structures rather than hourly billing, so you know your cost upfront. A scoping call with your HR leadership takes 30 minutes and is included at no charge—we use it to understand your situation, identify complexity, and give you a realistic timeline and cost range. We then propose a fixed fee that covers the investigation as scoped. If genuine scope expansion emerges (new witnesses, new allegations that weren't disclosed in scoping), we discuss that transparently before increasing cost.
Our pricing reflects what we do: defensible investigations conducted by HR-trained professionals who understand Ontario employment law, OHSA compliance, and the Human Rights Code. We work directly with your internal team, integrate with your existing policies, and deliver reports you can stand behind at MOL inspection or HRTO hearing. We price for reality, not optimism—we factor in the time complexity actually requires, not the time we hope it will take.
The investigation is defensible when it's properly scoped, thoroughly conducted, clearly documented, and communicated fairly to all parties. That's what we build into our cost structure from the beginning.
Next Steps: Get Your Realistic Cost Estimate
If you have a complaint pending and need to understand investigation cost and timeline for your specific situation, we can help. A 30-minute scoping call clarifies your actual scope, complexity, and timeline—and gives you a cost range you can budget against. We'll also answer questions about process, timeline, and what to expect.
Ready to discuss your investigation needs? Contact 1205 Consulting to schedule a free scoping conversation. We'll walk through your situation, answer questions, and give you the real numbers so you can move forward with confidence.