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Disciplinary30 minutes to 1 hour deliberation

How to decide on a disciplinary outcome

Choosing the right disciplinary sanction is critical. Too lenient and you fail to address the conduct; too severe and you face an unfair dismissal claim. This guide helps you make a defensible decision.

📜 Employment Rights Act 1996📖 ACAS Code of Practice on Disciplinary and Grievance Procedures (2015)
Guidance note: This guide sets out standard best practice based on the ACAS Code of Practice and current UK employment law. It is guidance, not legal advice. For complex or high-risk situations, consult an HR specialist before acting.
Step-by-step process

The test in disciplinary proceedings is the civil standard — the balance of probabilities — not the criminal standard of beyond reasonable doubt. Ask: is it more likely than not that the conduct occurred? You do not need to be certain. Document your reasoning.

The sanctions available under most disciplinary procedures are: no further action; informal advice or guidance; a first written warning; a final written warning; and dismissal (with or without notice). Some procedures also include demotion or loss of privileges as alternatives to dismissal. Use the sanction that is proportionate to the misconduct.

Has the same or similar conduct been dealt with in the same way for other employees? Inconsistency is one of the most common reasons disciplinary decisions are overturned at tribunal. If you are treating this employee more harshly than others in similar circumstances, you need a good reason for doing so.

Watch out: Inconsistent treatment is a major tribunal risk. Check how you have dealt with similar cases before deciding.

Before deciding on sanction, consider all mitigating factors raised by the employee: their length of service; their previous disciplinary record (or lack of one); any personal circumstances (health, bereavement, family pressures); whether they were aware the conduct was unacceptable; whether they showed remorse; and whether any training or support was offered before the disciplinary action.

Gross misconduct is conduct so serious that it fundamentally destroys the employment relationship and justifies summary dismissal (dismissal without notice). Examples typically include: theft, fraud, violence, serious health and safety breaches, gross insubordination, and serious harassment. For gross misconduct, a single act can justify dismissal even for a long-serving employee — but the investigation and hearing must still be carried out fairly.

Legal basis: ERA 1996 s.98(4): dismissal must be within the band of reasonable responses available to a reasonable employer in the circumstances.

The Employment Tribunal does not ask whether dismissal was the right decision — it asks whether dismissal was within the range of reasonable responses available to a reasonable employer. This means you have some latitude, but the decision must be one that a reasonable employer could have made. Document your reasoning clearly so you can demonstrate this if challenged.

Write to the employee confirming: the outcome; the reasons for the decision; if a warning is issued — the level, the duration, and what must improve; if dismissed — the effective date, notice entitlement (or reason for summary dismissal), and information about final pay; and the right of appeal and how to exercise it. The letter should be sent promptly — ideally the same day or within 24 hours of the hearing.

⚠ Common mistakes to avoid
Dismissing for a first offence where the conduct does not amount to gross misconduct
Failing to consider mitigation before deciding
Treating this employee more harshly than others in similar situations
Making the decision before the hearing
Not documenting the reasoning for the decision
Related guides
How to run a disciplinary hearingHow to handle a disciplinary appeal