What Happens at a Disciplinary Investigation Meeting

An investigation meeting is often the first formal conversation an employee has about a concern, and the way it is handled shapes everything that follows. Employers frequently treat it as a preliminary chat and prepare accordingly. Employees, understandably, often treat it as the start of a disciplinary case. Both are partly right, and that tension is why the meeting needs care.

This post explains what an investigation meeting involves, how it differs from a disciplinary hearing, and what a well-run investigation looks like. It is written primarily for employers and managers, but it is also relevant for employees who have been asked to attend one.

What an investigation meeting is, and what it is not

The purpose of an investigation is to establish the facts so that the employer can decide whether there is a case to answer. It is not a hearing, and no decision about guilt or sanction is made at it. The Acas Code of Practice on disciplinary and grievance procedures says employers should carry out necessary investigations without unreasonable delay, and that it is not normally appropriate for the investigator and the decision-maker to be the same person.

That separation matters. An investigator gathers evidence, speaks to the people involved and reports on what they find. A separate person then decides whether to hold a disciplinary hearing and, at the hearing, whether the allegations are made out. Where the two roles blur, the employee can fairly say the outcome was decided before they had their say.

The investigation meeting is therefore a fact-finding conversation. The employee is there to give their account, and the investigator is there to listen, ask questions and record what is said.

Before the meeting: preparation and process

The investigator should start by understanding the concern. That means reading the complaint or report, identifying which policies or standards might be engaged, and deciding what needs to be established. A proportionate investigation is targeted. A minor issue may need one conversation and a look at some documents. A serious allegation may need several interviews, CCTV, emails or system logs.

The employee should be told about the meeting in writing, given reasonable notice, and told what it is about, in enough detail to make sense of the questions without prejudging the outcome. The invitation should explain that the meeting is part of an investigation, that no decision has been made, and that the outcome may be a disciplinary hearing, informal action or no further action. It should also say that the matter is confidential.

There is generally no statutory right to be accompanied at an investigation meeting. The right under the Employment Relations Act 1999 applies to disciplinary and grievance hearings. Many employers allow a companion at investigation meetings anyway, particularly for serious allegations or vulnerable employees, and the employer's own policy or contract may provide for it. Whatever the position, it is sensible to say so clearly in the invitation.

Suspension should not be automatic. It is justified only where there is a real risk to the investigation, to other people or to the business, and it should be reviewed regularly and kept as short as possible. The draft revised Acas Code, discussed below, sets out in more detail when suspension is appropriate.

The investigator should also consider adjustments. An employee with a disability, a health condition or a neurodivergent profile may need more time, a different environment, questions in advance or breaks.

At the meeting: what actually happens

The investigator opens by explaining who they are, what the investigation is about, how the meeting will run and how notes will be taken. They should make clear that the purpose is to understand the facts and that no decision has been made.

The employee is then invited to give their account in their own words. Open questions work best at this stage: what happened, who was there, what was said. Leading questions and assumptions should be avoided. The employee should also be asked whether there is anyone else the investigator should speak to, and whether there are documents or other evidence to consider. A fair investigation looks for evidence that supports the employee's account as well as evidence against it.

The investigator then asks more specific questions to test the account, fill gaps and clarify inconsistencies. This should be done calmly and without accusation. Where the employee is asked to respond to a statement or a document, they should see it or have it fairly described.

At the end, the investigator should summarise the main points, explain what will happen next and how long it is likely to take, and ask the employee whether there is anything they want to add. Notes or a statement should be produced promptly and shared with the employee so they can confirm or correct them.

Other people, such as complainants, witnesses and managers, are usually interviewed separately, using the same open, neutral approach. Witnesses should be told how their statements may be used, since the employee may need to see them if a disciplinary hearing follows.

After the meeting: the investigation report

When the investigator has gathered the evidence, they should write a report. It should set out the allegations, the steps taken, the evidence gathered, the findings of fact, any conflicts in the evidence, and a recommendation on whether there is a case to answer. It should not recommend a sanction. That is a question for the person who chairs any disciplinary hearing.

The employee should be told the outcome of the investigation in writing. If the case proceeds to a disciplinary hearing, the invitation should attach the report and the evidence relied on. If it does not, the letter should say so clearly, and explain any informal steps that follow.

What is changing

Acas has published a draft revised Code of Practice, consulted on until 23 September 2026 and expected to take effect in 2027. It confirms that some cases can be investigated by reviewing documents alone, while others need meetings with the people involved, and it puts greater emphasis on proportionality. It also expects employers to consider informal resolution before starting a formal process, other than in cases of gross misconduct and similar serious matters. Alongside the change to the unfair dismissal qualifying period from 1 January 2027, this makes the quality of early investigation more important than ever.

The final word

A good investigation meeting is neutral, proportionate and well recorded. It does not decide anything, but it determines whether the decision that follows can be trusted.