🇬🇧 UK · Employment Law · Updated 2026-06-27
Gross misconduct vs misconduct: what's the difference?
Misconduct is behaviour that falls below the standard your employer reasonably expects. Gross misconduct is a subset that is so serious it fundamentally destroys the employment relationship — allowing summary dismissal (immediate, without notice or pay in lieu). The distinction matters enormously: gross misconduct means you lose your notice pay; ordinary misconduct typically means a warning, not dismissal.
Key differences at a glance
| Aspect | Gross misconduct | Misconduct |
|---|---|---|
| Definition | Conduct so serious it fundamentally destroys the employer–employee relationship | Behaviour falling below the expected standard, but not serious enough to justify immediate dismissal |
| Dismissal outcome | Summary dismissal — immediate, without notice or pay in lieu | Formal warnings (verbal → written → final written); dismissal only after process exhausted |
| Notice pay on dismissal | None — summary dismissal means no notice entitlement if the finding is upheld | Full statutory or contractual notice (or PILON) is owed even on dismissal |
| Common examples | Theft, fraud, physical violence, sexual harassment, serious health & safety breaches, deliberate data destruction | Poor timekeeping, minor insubordination, low performance (conduct-based), occasional policy breaches |
| Investigation requirement | Still required — employer must investigate before dismissing, even for gross misconduct (ACAS Code) | Required at every stage — investigation, disciplinary hearing, right of appeal |
| ACAS Code compliance | Applies — failure to follow the Code can result in up to 25% uplift on any award at tribunal | Applies — employer must follow: investigation, written invitation, hearing, outcome letter, right of appeal |
| Unfair dismissal risk | Dismissal may still be unfair if the employer did not genuinely believe in guilt, had insufficient grounds, or followed an unfair process | High risk of unfair dismissal if employer skips warnings or fails to follow a fair process |
| Redundancy pay | Not affected by gross misconduct — if redundancy is genuine, pay is owed regardless | Not affected |
The bottom line
Even where the conduct is genuinely serious, employers are not free to dismiss without following the ACAS Code of Practice. A finding of gross misconduct that is arrived at after an inadequate investigation, without a proper disciplinary hearing, or without a right of appeal may still be unfair — and a 25% uplift may apply to any award. If you have been dismissed for alleged gross misconduct and dispute the finding, you may have an unfair dismissal claim.
Redundancy pay calculator
Calculate →Notice period calculator
Calculate →Frequently asked questions
Can I be dismissed for gross misconduct without a warning?
Yes — summary dismissal for gross misconduct does not require prior warnings, because the conduct itself is so serious. However, your employer must still carry out a fair investigation and disciplinary procedure before dismissing. Skipping the investigation, not giving you a chance to respond, or failing to offer a right of appeal can make the dismissal procedurally unfair.
Do I lose my redundancy pay if I'm dismissed for gross misconduct?
No. Statutory redundancy pay is owed when a genuine redundancy situation exists, regardless of any prior misconduct. The only way misconduct can affect redundancy pay is if your employer dismisses you for misconduct as an alternative to making you redundant — but a dismissal for gross misconduct during a genuine redundancy process could be challenged as unfair if the conduct was used as a pretext.
What is the ACAS Code of Practice on disciplinary procedures?
The ACAS Code of Practice on Disciplinary and Grievance Procedures sets out the steps an employer should take in any disciplinary situation: investigate, inform the employee in writing, hold a hearing (with the right to be accompanied by a colleague or trade union representative), inform the employee of the outcome, and offer a right of appeal. Failure to follow the Code does not automatically make a dismissal unfair, but an Employment Tribunal can increase any award by up to 25% if the employer unreasonably failed to follow it.
I was dismissed for gross misconduct but I deny the allegation. What can I do?
If you have 2 years' continuous employment, you can bring an unfair dismissal claim at the Employment Tribunal (after going through ACAS early conciliation). The tribunal will ask whether the employer had a genuine belief in your guilt, whether there were reasonable grounds for that belief after a proper investigation, and whether the sanction of dismissal was within the range of reasonable responses. You do not need to prove your innocence — you need to show the employer's process or conclusion was outside the range of reasonable responses.
Can I be put on suspension during a gross misconduct investigation?
Yes. Suspension on full pay during a disciplinary investigation is common and is not, in itself, a disciplinary sanction or a breach of contract (unless your contract prohibits it). However, automatic or lengthy suspension without genuine reason can in some circumstances amount to a breach of the implied term of trust and confidence — particularly for senior employees or those whose professional reputation could be damaged.