What is the UK disciplinary procedure?

The five ACAS Code stages: investigation, written notice of allegations, hearing (with right to be accompanied), written decision, and appeal. Applies to all UK employees regardless of length of service. Failure to follow can uplift tribunal awards by 25 per cent.

Can I be suspended during a disciplinary investigation?

Yes. Suspension is a neutral holding step, not a punishment. Should be on full pay, for the minimum period necessary, and communicated in writing. Suspension without valid reason or beyond a reasonable period can be constructive dismissal.

Can I bring someone to a disciplinary hearing?

Yes. Section 10 Employment Relations Act 1999 gives every worker the right to be accompanied by a colleague or trade union representative. The companion can address the hearing, confer with you, and take notes.

How long do I have to appeal a disciplinary decision?

Usually 5-10 working days from the written decision. Check your specific policy or contract. Appeal is heard by a manager senior to the dismissing manager who was not previously involved.

What sanctions can be imposed?

Informal warning, first written warning, final written warning, demotion/transfer (rare), dismissal with notice, or summary dismissal without notice (gross misconduct only). Sanction must be proportionate to the misconduct.

Disciplinary Procedure UK (2026): ACAS Code + Employee Rights

Why this matters right now

The 2024 ACAS Code refresh strengthened the requirement for written investigation reports and evidence disclosure to the employee before the hearing. Employers who cut corners are increasingly reversed on appeal or face uplifted tribunal awards. As an employee, understanding the process gives you real protection.

The five ACAS Code stages

Investigation — the employer establishes the facts before deciding to hold a disciplinary hearing. Should be separate person from the dismissing manager. Interviews witnesses, gathers documents.
Written notice of the allegations, evidence, potential sanctions, hearing date and time (minimum 3-5 working days notice), and the right to be accompanied.
Hearing — chaired by the disciplinary manager. Employee has statutory right to be accompanied. Both sides present. Manager adjourns to consider.
Decision — written outcome with reasons, within a reasonable time (usually 5-10 working days).
Appeal — right of appeal to a senior manager not previously involved. Similar hearing format.

Suspension during investigation

Suspension is not a punishment. It is a neutral holding step used where the alleged misconduct is serious enough that continued attendance would prejudice the investigation or the workplace. Suspension should be:

On full pay and benefits.
For the minimum period necessary.
Reviewed regularly (typically weekly).
Communicated in writing with reasons.
Not disclosed to colleagues except on a need-to-know basis.

Being suspended is not a breach of contract; being suspended without valid reason or beyond a reasonable period can be constructive dismissal.

Your right to be accompanied

Section 10 Employment Relations Act 1999 gives every worker the right to be accompanied at a disciplinary hearing by a colleague or trade union representative. The companion can:

Address the hearing (present the case, sum up).
Confer with you during the hearing.
Take notes.

The companion cannot answer questions on your behalf. Denying the right of accompaniment is a breach of statute and grounds for tribunal claim.

Sanctions

Sanction	When used
Informal warning	Minor performance or conduct issues
First written warning	Minor misconduct or continued performance issues
Final written warning	Serious misconduct or repeated misconduct
Demotion / transfer	Rare; usually alternative to dismissal
Dismissal with notice	Repeated misconduct after final warning
Summary dismissal (no notice)	Gross misconduct only

Case example: dismissal reversed at appeal

An office worker was dismissed for allegedly sending confidential client data to a personal email. The investigation established the fact but did not consider the employee's explanation (a home-working workflow where personal email was habitually used for editing). On appeal, the appeal manager took evidence that the workflow was widely used across the team and no client harm had resulted. Dismissal was reversed, replaced with a written warning plus training. The lesson: appeals often succeed by surfacing context the dismissing manager missed or dismissed.

How to protect your position at each stage

Ask for the specific allegations, in writing, with dates and evidence.
Request all evidence the employer relies on, in advance of the hearing.
Bring a companion (union rep for preference, otherwise a colleague).
Take notes at every meeting; ask for written minutes.
Present your evidence and mitigation in writing as well as verbally.
Note any procedural failures - they matter at appeal and tribunal.
Do not admit to allegations you dispute just to end the process.
Take advice from ACAS (free) or a specialist employment-law solicitor.

Failure to follow the Code

ACAS Code non-compliance can trigger an uplift of up to 25 per cent on a subsequent tribunal award. Common failures:

No separate investigation.
Failure to disclose evidence before the hearing.
Hearing without adequate notice.
No right of accompaniment.
No appeal offered.
Same manager investigates, hears and decides.

Post-dismissal options

If the outcome is dismissal, immediate actions:

Request the dismissal letter and hearing minutes in writing.
Lodge internal appeal within the deadline.
Notify ACAS Early Conciliation within 3 months less one day.
Consider unfair dismissal claim (2 years service for ordinary; day-one for automatic-unfair).
Consider settlement negotiation if the employer is open to it.

Useful calculators

Related guides

Authority pages

Frequently asked questions

What is the UK disciplinary procedure?: The five ACAS Code stages: investigation, written notice of allegations, hearing (with right to be accompanied), written decision, and appeal. Applies to all UK employees regardless of length of service. Failure to follow can uplift tribunal awards by 25 per cent.
Can I be suspended during a disciplinary investigation?: Yes. Suspension is a neutral holding step, not a punishment. Should be on full pay, for the minimum period necessary, and communicated in writing. Suspension without valid reason or beyond a reasonable period can be constructive dismissal.
Can I bring someone to a disciplinary hearing?: Yes. Section 10 Employment Relations Act 1999 gives every worker the right to be accompanied by a colleague or trade union representative. The companion can address the hearing, confer with you, and take notes.
How long do I have to appeal a disciplinary decision?: Usually 5-10 working days from the written decision. Check your specific policy or contract. Appeal is heard by a manager senior to the dismissing manager who was not previously involved.
What sanctions can be imposed?: Informal warning, first written warning, final written warning, demotion/transfer (rare), dismissal with notice, or summary dismissal without notice (gross misconduct only). Sanction must be proportionate to the misconduct.

Sources and further reading

ACAS Code of Practice on Disciplinary and Grievance Procedures — The procedural standard.
Employment Relations Act 1999, section 10 — Right to be accompanied at hearings.
Employment Rights Act 1996, section 86 — Statutory minimum notice.
ACAS — Free, impartial UK employment advice.
GOV.UK: Disciplinary procedures — Government guidance.

General information about UK employment law, not legal advice. For your situation, contact ACAS or an employment-law solicitor.