Gross misconduct is conduct so serious that it fundamentally breaks the employment relationship and justifies summary dismissal — dismissal without notice or pay in lieu of notice. Common examples include theft, violence, serious health and safety breaches, and fraud. However, even for gross misconduct, you must carry out a reasonable investigation and hold a formal disciplinary hearing before dismissing. Skipping the process exposes you to an unfair dismissal claim even when the misconduct itself is clear.
What is gross misconduct?
Gross misconduct is behaviour that is so serious it destroys the trust and confidence that must exist between employer and employee. It gives the employer the right to dismiss immediately, without working through the normal warning stages.
The law does not define a fixed list of gross misconduct offences. Instead, it is for the employer (and ultimately a tribunal) to assess whether the conduct was serious enough in the circumstances.
Common examples of gross misconduct
While every case turns on its facts, the following are widely recognised as potential gross misconduct:
| Category | Examples | |---|---| | Dishonesty | Theft, fraud, falsifying records, dishonest expenses claims | | Violence | Assault, threatening behaviour, fighting at work | | Health and safety | Serious breaches that put colleagues or others at risk | | Discrimination | Harassment based on a protected characteristic | | Substance misuse | Being drunk or under the influence of drugs at work | | Data breach | Deliberately leaking confidential data or customer information | | Insubordination | Serious and deliberate refusal to follow reasonable instructions | | Damage to property | Deliberate destruction of employer or customer property |
Your employment contract or staff handbook should define what the business treats as gross misconduct. This is not a legal requirement — but it helps manage employee expectations and supports a fair dismissal decision.
The gross misconduct dismissal process
Despite the seriousness of the conduct, you must follow a fair procedure. A tribunal will ask three questions:
- Did you have a genuine belief that the employee was guilty?
- Was that belief based on reasonable grounds after a reasonable investigation?
- Was dismissal within the range of reasonable responses?
Step 1: Suspend on full pay if necessary
If the employee's continued presence poses a risk to the business, colleagues, or the integrity of the investigation, suspend them on full pay. Suspension is not a punishment and should not be presented as one.
Step 2: Investigate
Gather evidence. Take statements. Check records. Give the employee an opportunity to provide their account at the investigation stage if appropriate.
Step 3: Invite to a disciplinary hearing
Issue a written invitation to a formal disciplinary hearing. State:
- The allegation(s) clearly
- That this could result in dismissal
- The employee's right to be accompanied
Step 4: Hold the hearing
Present the evidence. Let the employee respond fully. Adjourn before deciding.
Step 5: Dismiss in writing
If you decide to dismiss, confirm the outcome in writing. State:
- That the employment is terminated
- The reason (gross misconduct)
- That no notice or pay in lieu of notice is being paid (for summary dismissal)
- The right to appeal
Step 6: Hear the appeal
Offer and conduct a genuine appeal before a different manager if possible.
Summary dismissal vs dismissal with notice
For gross misconduct, you can dismiss summarily — without notice and without pay in lieu of notice. This is one of the key distinctions between gross misconduct and ordinary misconduct.
However, if you choose to give notice or pay in lieu of notice despite gross misconduct (for example, as a goodwill gesture or to avoid dispute), this does not mean you are accepting the dismissal was not for gross misconduct. Make this clear in the dismissal letter.
What if the evidence is disputed?
If the employee denies the allegation and the evidence is not conclusive, you can still dismiss for gross misconduct — provided you had a genuine and reasonable belief based on a reasonable investigation. A tribunal does not require proof beyond reasonable doubt. The civil standard (balance of probabilities) applies.
Document your reasoning carefully, including why you found the evidence against the employee more credible than their denial.
Frequently asked questions
Can I dismiss for gross misconduct without a hearing? No. Even for the most serious misconduct, a hearing is required before dismissal. Without a hearing, the dismissal is almost certainly procedurally unfair — and a tribunal may award compensation accordingly.
Does the employee get their notice pay if dismissed for gross misconduct? Not for summary dismissal. Gross misconduct justifies immediate termination without notice or pay in lieu. However, accrued but untaken annual leave must still be paid.
What if the gross misconduct is also a criminal offence? You do not need to wait for the outcome of a criminal investigation or prosecution before making your own decision to dismiss. The employment process and the criminal process are separate. If the employee is arrested, you can suspend and then proceed with your own investigation.
Can an employee with less than 2 years service claim unfair dismissal for gross misconduct? Employees need 2 years of continuous employment to bring an ordinary unfair dismissal claim. However, there is no qualifying period for claims of automatic unfair dismissal (e.g. whistleblowing, pregnancy) or discrimination. Always follow fair process regardless of length of service.
What should I include in the gross misconduct section of my staff handbook? List the types of conduct the business treats as gross misconduct, make clear the list is non-exhaustive, and state that gross misconduct may result in summary dismissal following a disciplinary hearing. Review the list annually and when legislation changes.
