An Employer's Guide to Gross Misconduct and Fair Dismissal

Gross misconduct is conduct serious enough potentially to justify dismissal without notice, such as theft, violence, serious safety breaches or serious harassment. A disciplinary policy should give examples and be communicated clearly. The list is not exhaustive, however: conduct does not have to appear word-for-word in a policy to be capable of amounting to gross misconduct. Seriousness, context, consistency and evidence all matter.

In Great Britain, ordinary unfair-dismissal eligibility generally requires two years' service as at 30 September 2026, with exceptions. A tribunal considering an eligible claim asks whether the employer had a potentially fair reason and acted reasonably, including in procedure. Northern Ireland generally has a one-year qualifying period and separate LRA procedures.

A practical process

  1. Decide whether temporary suspension is necessary; it should not be automatic. Consider alternatives, pay, duration and regular review.
  2. Investigate reasonably and impartially. Seek relevant evidence both for and against the allegation; the required depth depends on circumstances.
  3. Tell the employee the allegation, possible consequences and hearing arrangements in writing, normally sharing relevant evidence and allowing reasonable preparation time.
  4. Hold a genuine hearing. At a qualifying disciplinary hearing the employee has a statutory right to be accompanied by an eligible colleague or trade union representative. Hear and consider their response and mitigation.
  5. Decide on the evidence and whether dismissal is a reasonable and proportionate response; not every established misconduct allegation warrants summary dismissal.
  6. Communicate the reasoned outcome in writing and offer an appeal, preferably handled impartially.

Where conduct actually amounts to a repudiatory breach, summary dismissal can mean no contractual or statutory notice pay. A payment-in-lieu-of-notice clause does not, merely by existing, automatically require a payment after gross misconduct; check its wording and whether misconduct is established. Accrued holiday and wages earned remain payable. Wrongful dismissal (contractual notice) and unfair dismissal (statutory fairness) are distinct claims. Compensation limits depend on date and jurisdiction; the April 2025 £115,115 figure is not a current universal cap. In relevant GB claims unreasonable failure to follow the Acas Code can permit, but does not guarantee, an adjustment of up to 25%.

Do not promise tribunal immunity or say an allegation can never lead to dismissal on the day it arises; a reasonable fair process is essential, and urgency does not replace it. No unverified HR testimonial is relied upon.

👉 Employer guidance: https://myredundancyrights.co.uk/employer

Official guidance: Acas disciplinary Code (GB); Acas disciplinary steps; GOV.UK unfair dismissal eligibility; LRA (NI).