Gross misconduct: examples and what follows
No legal list exists, so your policy defines it - and \u201csummary\u201d dismissal refers to the notice, never the procedure.
There is no legal list of gross misconduct. It means conduct serious enough to destroy the trust the employment relationship depends on, justifying dismissal without notice. What it never means is dismissal without a process: even the clearest case still needs an investigation, a hearing the person can be accompanied to, and an appeal. "Summary" refers to the notice, not the procedure.
What counts as gross misconduct?
Whatever your disciplinary policy says counts - which is exactly why the policy needs a list. Examples that appear in most UK policies:
| Category | Typical examples |
|---|---|
| Dishonesty | theft, fraud, falsifying records or timesheets, deliberate expenses abuse |
| Violence & abuse | physical violence, serious threats, harassment or bullying, discrimination |
| Safety | serious breach of health and safety rules, endangering others, disabling safety equipment |
| Impairment | being under the influence of alcohol or drugs at work, where it affects safety or performance |
| Trust | serious breach of confidentiality, misuse of company systems or data, serious conflict of interest |
| Insubordination | serious and deliberate refusal to follow a reasonable instruction |
| Reputation | conduct outside work that genuinely damages the business or makes the role untenable |
Two cautions. A list should say it is not exhaustive, or you will find yourself unable to act on something obvious that nobody thought to write down. And listing something does not make dismissal automatic - the circumstances still have to be considered.
What counts as a sackable offence at work?
"Sackable offence" is not a legal category - what makes conduct dismissible is whether it destroys the trust the employment relationship needs, and whether a fair procedure was followed. In practice the sackable-without-notice list is the gross misconduct list above: theft, violence, serious safety breaches, harassment, fraud, being unfit through drink or drugs. Persistent lesser misconduct - lateness, minor policy breaches - can also end in dismissal, but only through warnings first. The offence matters less than the process: an employee sacked fairly for something minor-sounding survives tribunal scrutiny better than one sacked badly for something serious. See the disciplinary procedure guide, and capability versus conduct for the line between can't and won't.
Does gross misconduct mean instant dismissal?
No, and this is the most expensive misunderstanding in the area. Gross misconduct allows dismissal without notice or pay in lieu. It does not allow dismissal without a fair procedure. Sacking somebody on the spot - however clear the conduct - is how a genuinely fair reason becomes an unfair dismissal.
- Investigate - establish the facts before deciding anything. Suspension, if needed, is neutral and should be brief.
- Inform in writing - the allegations, the evidence, and that dismissal is a possible outcome.
- Hold a hearing - the person has the statutory right to be accompanied by a colleague or trade union representative.
- Decide, and say why - in writing.
- Offer an appeal - heard by someone not previously involved wherever possible.
Employment tribunals can increase an award by up to 25% where an employer unreasonably fails to follow the Acas Code. The full walk-through is in the disciplinary procedure guide.
Is suspension automatic?
No, and it should not be reflexive. Suspension is appropriate where there is a genuine risk - to an investigation, to other people, or to the business - not as a signal that somebody is in trouble. It should be on full pay, as short as possible, explained in writing as a neutral act, and reviewed rather than left running.
What about conduct outside work?
It can be gross misconduct, but the link to the job has to be real: it damages the business, makes the role untenable, or destroys trust in a way that matters to the work. A criminal charge alone does not automatically justify dismissal - what matters is the effect on the employment relationship, and a fair process still applies.
Conduct, or capability?
Worth pausing on before starting a disciplinary. Gross misconduct is a won't problem - a deliberate act. If somebody is falling short because they cannot do the work, or because of ill health, that is capability and follows a different, more supportive route. Mislabelling one as the other is a common way to lose a defensible case: see capability versus conduct.
And note the timing: from 1 January 2027 unfair dismissal protection begins at six months' service rather than two years, so far more people will be able to test a dismissal at tribunal. What changes.
What should the policy say?
- A non-exhaustive list of examples, written in plain terms people recognise.
- That gross misconduct may lead to dismissal without notice - so it is never a surprise.
- The procedure: investigation, hearing, right to be accompanied, decision, appeal.
- When suspension may be used, and that it is neutral and paid.
- Who decides and who hears appeals - different people, wherever your size allows.
Letter wording for each stage is in the disciplinary procedure guide.
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