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Labor Relations | Employee Relations

How Long Do HR Investigations Take?

Read Time 4 mins | Mar 12, 2025 | Written by: Frankie Kourtis

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HR investigations are time-sensitive processes that are often required to resolve delicate workplace issues. A properly handled investigation is necessary for legal compliance as well as promoting trust within your organization. 

But how long do HR investigations take your internal team to complete? Much like with an external Department of Labor investigation, the answer will depend on the complexity of the case, the number of parties involved, and the availability of evidence. While some investigations wrap up in a matter of days, others may take weeks or even months.

How Long Do HR Investigations Take? 4 Factors Influence HR Investigation Outcomes:

1. Complexity of the Allegations

Minor policy violations, such as attendance issues, are typically resolved quickly. However, more serious cases — including harassment, discrimination, or misconduct — require in-depth fact-finding, multiple interviews, and legal considerations. The more serious the allegation, the longer the investigation is likely to take.

2. Number of Parties Involved

Each investigation requires interviews with key individuals, including the complainant, the accused, and any witnesses. A case involving only two employees will move much faster than one with multiple witnesses, department heads, or external investigators.

3. Availability and Type of Evidence

The type of evidence available can have a huge impact on the HR investigation timeline. If there are clear documents, emails, or surveillance footage, the process is often quicker. Cases that rely heavily on witness testimony or subjective accounts may take longer to verify and corroborate.

4. Cooperation of the Parties Involved

When employees provide statements and documentation promptly, HR investigations move efficiently. However, delays in scheduling interviews or obtaining responses can stretch an investigation over several weeks.

Typical HR Investigation Timelines


Short Investigations 
(1-2 Weeks)


Straightforward cases, such as minor workplace conflicts or policy violations, can often be concluded within one to two weeks. Fast-resolved cases typically involve clear evidence and minimal disputes over facts.


Moderate Investigations
(3-4 Weeks)


For more involved cases, including HR investigations into workplace misconduct or harassment, the investigative process may take several weeks more. This allows more time for gathering statements, reviewing documents, and making sure due diligence is given before a resolution.


Longer Investigations 
(1-2 Months or More)


Especially sensitive or complex cases, such as discrimination claims, retaliation allegations, or union labor relations, can often extend to a few months (or beyond). These investigations may involve external legal reviews, extensive evidence collection, and additional procedural steps to ensure compliance with workplace laws.

Why Timeliness Matters in HR Investigations

  • Employee Trust and Confidence: When employees report a workplace concern, they expect HR investigations to be handled swiftly and fairly. Delayed investigations can lead to frustration, decreased morale, and a lack of trust in the organization’s commitment to accountability. Positive employee relations will depend on timeliness.
  • Potential Legal Risks: Prolonged investigations increase the risk of mishandling a complaint and can potentially lead to legal action. Employers must accurately follow a structured HR investigation process to protect the organization from lawsuits and compliance violations.
  • Impact on Workplace Culture: A slow or inconsistent response to employee complaints might create a perception that the organization does not take workplace issues seriously. A structured, efficient approach reinforces a culture of fairness and transparency.

How HR Can Expedite Investigations

Establish Clear Procedures

You’ll want your organization to always follow a consistent, structured approach to investigations and lay the groundwork early. A well-defined HR case management system can help. Reduce unnecessary delays with clearly recorded protocols for interviews, evidence collection, and documentation — and automated reminders for each step in your process.

Act Promptly and Communicate Expectations

From the moment a complaint is filed, HR should move quickly to initiate interviews and gather the necessary information. You can help keep the process moving by setting clear expectations with employees about response times and preparing investigation questions beforehand.

Use HR Case Management Software

Arm your HR team to manage investigations efficiently with a centralized HR case management software platform. A purpose-built system helps HR to organize case files, automate notifications, and track progress in real time. With a proactive approach, HR teams can complete investigations quickly while maintaining fairness and compliance.

LaborSoft is ready to assist with all of your HR investigation needs. To discover how our software can streamline your document management and investigative processes, schedule a demo today.