A complaint lands on a manager’s desk at 4.30 pm on a Friday. It may involve bullying, harassment, theft, a safety breach, misuse of company property or a serious conduct concern between colleagues. The misconduct investigation steps workplace leaders take in the next few days can protect people, preserve evidence and materially reduce business risk. Getting them wrong can turn one employee issue into a costly Fair Work, workers compensation or reputational problem.
For small and medium-sized businesses, the goal is not to create a court-style process. It is to run a fair, timely and well-documented process that gives everyone a proper opportunity to be heard and allows the business to make a defensible decision.
When a workplace investigation is needed
Not every complaint requires a formal investigation. A minor misunderstanding, for example, may be resolved through a manager-led conversation, coaching or mediation if both employees agree and there is no serious risk. A formal process is usually appropriate where the allegation could lead to disciplinary action, concerns serious misconduct, involves a pattern of behaviour, or may affect the health, safety or wellbeing of employees.
Common triggers include allegations of bullying, sexual harassment, discrimination, violence, theft, fraud, breaches of confidentiality, drug and alcohol issues, conflicts of interest and significant policy breaches. The nature of the complaint, the evidence available and the potential impact on people and operations will determine the level of process required.
Speed matters, but rushing is not the answer. Delays can mean evidence disappears, memories fade and employees lose confidence in the process. Equally, deciding the outcome before hearing from the employee is a procedural fairness failure. The right approach is prompt, measured and impartial.
Misconduct investigation steps workplace leaders should follow
1. Receive the concern and assess immediate risk
Start by recording what has been raised, when it was raised, who is involved and whether there are any immediate safety or operational concerns. Do not promise absolute confidentiality. You should explain that information will be handled as sensitively as possible, but may need to be shared with those who need it to investigate and respond fairly.
Consider whether interim measures are needed while the matter is examined. This could include adjusting rosters, changing reporting lines, directing employees not to contact each other about the matter, securing company devices or moving stock and records. These measures should be practical and neutral, not a punishment disguised as a precaution.
In some cases, suspension on pay may be justified, particularly where there is a genuine risk to safety, evidence, customers or the business. It should not be automatic. Suspension can be damaging to an employee’s reputation and wellbeing, so it needs a sound reason, a clear written direction and regular review.
2. Define the allegations clearly
A vague allegation such as “poor attitude” or “bullying behaviour” is not enough to investigate fairly. Break the concern into specific allegations that can be tested. Identify the alleged conduct, dates or date ranges, location, people involved, relevant policies and any possible witnesses or documents.
For example, rather than investigating whether a supervisor was “aggressive”, the allegation may be that the supervisor raised their voice, used particular words and stood close to an employee during a meeting on a particular date. Specificity helps the investigator ask useful questions and gives the respondent a genuine chance to respond.
Avoid loading the allegations with conclusions. The process should ask whether conduct occurred, not assume that it did.
3. Select an appropriate investigator
The investigator must be able to act impartially and have sufficient skill to manage the issues. For a straightforward matter, this may be a senior manager with no involvement in the complaint. For serious, sensitive or complex allegations, an external HR consultant or workplace investigator is often the safer choice.
Independence is especially important where the complaint concerns an owner, director, senior executive or close colleague of the person who would otherwise investigate. An investigator who appears biased can undermine the whole process, even where the underlying concern is valid.
The investigator’s role is to gather and assess evidence. The decision-maker should usually be someone else, particularly if disciplinary action may follow. Separating those roles improves objectivity and helps ensure the outcome is based on the findings, not personalities.
4. Preserve evidence before it is lost
Relevant evidence may include emails, Teams or Slack messages, CCTV, swipe-card records, rosters, timesheets, vehicle logs, photos, customer complaints, training records, policies and personnel files. Secure it early and keep a clear record of where it came from.
Do not access private information without checking the business’s authority and the purpose for doing so. Monitoring and surveillance laws, privacy obligations, workplace policies and any enterprise agreement may affect what can be reviewed and used. If electronic material is central to the allegation, obtain HR or legal advice before taking shortcuts.
Keep investigation materials separate from general personnel files where possible, with access limited to those who genuinely need it. Loose handling of sensitive information can create a second complaint while you are trying to resolve the first.
5. Interview the complainant, respondent and witnesses
Interviews should be planned, private and conducted respectfully. Begin with open questions, then test details such as what happened, who was present, what was said, what occurred afterwards and whether there is supporting material. Give the person time to provide their account rather than forcing them into a pre-set narrative.
The respondent must be told the substance of the allegations and given a reasonable opportunity to respond before findings are made. They do not necessarily need every document or witness statement in full, particularly where privacy or safety concerns arise, but they need enough detail to understand and answer the case against them.
Employees may request a support person. A support person is not generally there to answer questions for the employee or act as their advocate, unless another arrangement has been agreed. Allowing reasonable support is usually sensible, particularly in difficult meetings.
Witnesses should be reminded to keep the matter private and not discuss evidence with others. However, avoid directions that are unnecessarily broad or that prevent employees from seeking support, raising safety concerns or exercising workplace rights.
6. Test the evidence and make findings
Workplace investigations are generally assessed on the balance of probabilities – whether it is more likely than not that the conduct occurred. The more serious the allegation and potential consequences, the more careful the evidence assessment needs to be.
Consider consistency, detail, contemporaneous records, corroboration, plausibility and any reason a witness may have to misrepresent events. Do not treat a lack of CCTV or an independent witness as proof that nothing happened. Equally, an allegation alone does not automatically establish misconduct.
Findings should be made allegation by allegation: substantiated, not substantiated, or unable to be determined on the available evidence. “Not substantiated” does not necessarily mean the complainant was dishonest. It may simply mean there was insufficient reliable evidence to make a finding.
7. Prepare an investigation report
The report should set out the scope of the investigation, allegations, evidence reviewed, people interviewed, the respondent’s response, findings and reasons for those findings. Use factual, neutral language. Avoid emotional commentary, assumptions and labels that are not supported by evidence.
A good report gives the decision-maker a clear basis for action and shows that the business followed a fair process. It should not be circulated widely. Usually, the complainant and respondent receive an appropriate outcome communication, rather than the full report.
8. Decide the outcome and respond proportionately
If misconduct is substantiated, consider the seriousness of the conduct, prior warnings, length of service, remorse, consistency with previous cases, relevant policies, training provided and any mitigating circumstances. Possible outcomes range from counselling and training to a formal warning, final warning, demotion by agreement, or termination of employment.
There is no single correct sanction for every breach. A first-time policy lapse and deliberate theft should not be treated the same way. Before dismissing an employee, ensure the business has considered procedural fairness, contractual obligations, applicable awards or enterprise agreements, and the risk of an unfair dismissal or general protections claim. Small businesses should not assume the Small Business Fair Dismissal Code removes the need for a sound process.
Communicate the decision privately and clearly. Explain the finding, the action being taken, expected standards moving forward and any available review process. Where the complaint is substantiated, also let the complainant know that the matter has been addressed, without disclosing unnecessary disciplinary details.
Common errors that increase risk
The most damaging mistakes are often avoidable: treating a complaint as gossip, conducting interviews without clear allegations, allowing a conflicted manager to investigate, promising secrecy that cannot be maintained, or issuing a warning before the employee has responded.
Another common error is trying to solve a serious matter informally because the business wants to “keep the peace”. Informal resolution can be appropriate, but it is not a shortcut for allegations involving significant power imbalance, safety concerns, repeated behaviour or potential unlawful conduct.
Documentation also matters. If it is not recorded, a business may struggle months later to show what was alleged, what evidence was considered and why a decision was reached.
Practical support when the stakes are high
A workplace investigation affects real people and business continuity at the same time. Managers need to keep teams operating, maintain confidentiality as far as possible and make decisions that will stand up to scrutiny. That is difficult when the matter involves a senior employee, competing accounts or the possibility of termination.
The HR Department Consulting Group supports Australian SMEs with independent, practical workplace investigations, clear documentation and advice on appropriate next steps. Early HR support can help you set the process up properly before an avoidable error becomes the focus of the dispute.
A fair investigation will not guarantee that every person agrees with the outcome. It will, however, give your business the best chance of responding with care, consistency and a decision you can explain with confidence.