Formal Disciplinary Procedure: Everything You Need to Know

A formal disciplinary is not casual. It's a legal process with rules, timescales, and documentation. Get it wrong and it's tribunal fodder. Get it right and you're protected.

Here's what formal discipline actually requires.

Informal vs. Formal Discipline

Informal: A manager has a chat with an employee about something that's gone wrong. No paper trail, no formal meeting, just a conversation. "You've been late three times this month. What's going on?"

This is fine for minor issues.

Formal: A written allegation, a formal meeting with notice, an investigation if needed, documented evidence, an outcome letter, and the right to appeal.

Use formal discipline for serious issues or when informal chats haven't worked.

When to Use Formal Discipline

• Conduct issues (theft, dishonesty, breach of policy)

• Gross misconduct (violence, harassment, gross negligence)

• Performance that hasn't improved after informal chats

• Attendance issues that haven't improved

• Repeated breaches of policy

• Any issue where you might dismiss

The Legal Requirements (ACAS Code)

The ACAS Code of Practice sets the standard. It's not law, but tribunals use it to judge fairness. If you follow the Code, you're protected. If you ignore it, you're vulnerable.

The Code requires:

1. Written notification of the allegation. Tell them in writing what they're alleged to have done, specific incidents, and why it's serious.

2. Opportunity to prepare. Give them at least 5 working days' notice before the hearing. They need time to gather evidence and prepare their response.

3. The right to a hearing. Hold a formal meeting. Explain the allegations. Listen to their response. Ask questions. Don't decide on the spot.

4. Right to be accompanied. They can bring a colleague or trade union rep (not a lawyer).

5. Decision based on evidence. After the hearing, review all evidence and make a fair decision.

6. Confirmation in writing. Send an outcome letter with:

   • The allegation

   • The evidence you considered

   • Their response

   • Your finding

   • The disciplinary action (if any)

   • The right to appeal

7. Right to appeal. They must be able to challenge your decision.

Break any of these and you're not following the Code. Tribunals will hold that against you.

Step-by-Step Process

Step 1: Decide if there's a case to answer.

Before you start a formal disciplinary, make sure you have evidence. Can you point to specific incidents? Do you have documentation (emails, records, witness statements)?

If you're basing this on hearsay or one person's account, investigate first. Gather evidence before you accuse anyone.

Step 2: Send a written notification.

Letter should include:

• Date and subject line ("Notification of Formal Disciplinary Hearing")

• The allegations (specific, with dates and times)

• Why it's serious

• When the hearing will be

• That they can bring someone

• Information about the evidence you'll discuss

• That they should prepare their response

• Who to contact with questions

Send this at least 5 working days before the hearing. Email is fine, but keep a copy.

Step 3: Give them time to prepare.

They need at least 5 working days to:

• Gather evidence or witnesses

• Prepare their response

• Arrange someone to accompany them

Don't rush. A rushed hearing looks unfair.

Step 4: Hold the formal hearing.

At the meeting:

• Explain the allegations

• Present your evidence

• Let them respond fully (don't interrupt)

• Listen to any mitigating factors they raise

• Ask questions to understand their version

• If new information comes up that changes things, offer to investigate further rather than deciding on the spot

Don't make a decision in the meeting. Say you'll review everything and let them know.

Step 5: Decide privately.

After the meeting, review all evidence. Ask:

• Are the allegations proven (on the balance of probabilities)?

• How serious is this?

• What disciplinary action is appropriate?

Consider:

• Severity (is this a one-off or pattern?)

• Circumstances (were there extenuating factors?)

• Their record (first issue or repeat?)

• Consistency (have you treated similar cases the same way?)

Step 6: Send the outcome letter.

Include:

• Allegations

• Evidence considered

• Their response (summarize it)

• Your finding (proven or not)

• Disciplinary action (if any): First written warning, final written warning, or dismissal

• The right to appeal

• Appeal timescale (usually 5–10 working days)

• If applicable: performance improvement plan, suspension, or next review date

Keep it factual. Don't be emotional or sarcastic.

Step 7: Keep records.

Keep on file:

• The notification letter

• Evidence (emails, records, witness statements)

• Notes from the hearing

• The outcome letter

• Any appeal documents

If it goes to tribunal, this file is your evidence that the process was fair.

Disciplinary Actions: What's Appropriate?

First written warning. Usually for:

• First minor misconduct

• Conduct issues where the person hasn't been warned before

• Performance issues after informal chats have failed

Stays on file for 12 months (or whatever your policy says).

Final written warning. Usually for:

• Second misconduct within the warning period

• Serious misconduct (not gross misconduct)

• Serious performance issues

Stays on file usually 12–24 months.

Dismissal (with notice). For:

• Gross misconduct

• Repeated conduct issues after warnings

• Persistent performance issues despite warnings

Summary dismissal (without notice). For:

• Gross misconduct only

• Examples: Violence, theft, gross negligence, serious breach of trust

Requires very strong evidence.

Gross Misconduct vs. Regular Misconduct

Gross misconduct: So serious it breaks the employment relationship. Grounds for instant dismissal. Examples: violence, theft, deliberate breach of confidentiality, fraud, gross negligence.

Regular misconduct: Serious but not gross. Grounds for discipline (warning or dismissal after due process). Examples: repeated lateness, breach of policy, dishonesty about minor matters, insubordination.

The difference matters. Get it wrong (call regular misconduct "gross" when you don't have the evidence) and you'll lose a tribunal.

Common Mistakes in Formal Disciplinary

Not enough notice. Calling someone into a meeting with 2 days' notice and then disciplining them. Unfair.

Deciding beforehand. Going into the hearing having already decided to dismiss. Not genuinely listening to their response.

Inconsistency. One person gets a warning for being late. Another gets dismissed. Tribunals hate this.

No investigation. You heard something through the grapevine and started a disciplinary without checking the facts.

Mixing investigation and decision. The person doing the investigation makes the disciplinary decision. Bias. Keep them separate.

No documentation. Verbal warning given, no notes. Meeting held, no notes. Tribunal asks: "Where's the evidence?" You have nothing.

No appeal process. Tribunal asks: "Could they appeal?" You say "No, I made the decision and that was it." Red flag. Unfair.

Timeline

• Days 1–2: Gather evidence, decide there's a case

• Days 3–4: Send written notification

• Days 5–9: They prepare

• Day 10: Formal hearing

• Days 11–14: You review and decide

• Day 15: Send outcome letter

• Days 16–25: Appeal period (if applicable)

• Days 26+: Appeal hearing if needed

Total: 4–6 weeks for a complete process with appeal.

The Bottom Line

Formal discipline looks bureaucratic, but it's not red tape—it's protection. For you and them. A fair process documented properly is your best defence if things go further.

Skip the process and you're exposed. Follow it and you're protected.

Need help with a formal disciplinary? We advise on the process, investigate, run the hearing, or take it end-to-end.