Disciplinary Procedure at Work: A Complete UK Guide
Facing a disciplinary at work can be stressful and confusing. This guide explains your rights, the process your employer must follow, and what you can do to protect your position — based on the ACAS Code of Practice and UK employment law.
Last updated: July 2026. This guide provides general information, not legal advice.
What is a disciplinary procedure?
A disciplinary procedure is the formal process an employer follows when they believe an employee has committed misconduct or is underperforming. It is designed to ensure fairness by giving the employee notice of the allegations, an opportunity to prepare, a hearing to put their case, and a right of appeal.
Every employer should have a written disciplinary procedure, typically found in the staff handbook or employment contract. While employers can set their own process, it must meet the minimum standard set out in the ACAS Code of Practice on Disciplinary and Grievance Procedures.
The ACAS Code of Practice
The ACAS Code of Practice on Disciplinary and Grievance Procedures is the benchmark for fair workplace procedures. While it is not a law itself, employment tribunals take it into account when deciding whether a dismissal was fair.
Tribunal compensation adjustments
If an employer unreasonably fails to follow the ACAS Code, a tribunal can increase any compensation awarded by up to 25%. If the employee fails to follow it, compensation can be reduced by up to 25%.
The Code requires employers to handle issues informally where possible, carry out thorough investigations, inform employees of allegations in writing, hold a formal hearing, allow the employee to be accompanied, and provide a right of appeal.
Stages of a disciplinary process
A fair disciplinary process typically follows these key stages:
Informal resolution
Minor issues should first be handled informally — a quiet word or coaching conversation. The ACAS Code encourages employers to resolve matters without resorting to formal proceedings wherever possible.
Formal investigation
The employer appoints an investigating officer to gather evidence — witness statements, documents, emails, CCTV, etc. You should be told the nature of the allegations in writing and given copies of relevant evidence before any hearing.
Disciplinary hearing
A formal meeting where you can respond to the allegations, present evidence, and call witnesses. You have the statutory right to be accompanied by a work colleague or trade union representative. The hearing must be arranged with reasonable notice.
Decision and outcome
The decision-maker (ideally not the investigator) considers the evidence and decides on an outcome. Possible outcomes include: no action, informal warning, written warning, final written warning, demotion, or dismissal. You must be notified of the decision and the reasons in writing.
Appeal
You have the right to appeal any disciplinary decision. The appeal should be heard by a more senior manager who was not involved in the original decision. The appeal can consider the fairness of the process, the severity of the sanction, and any new evidence.
Your rights during a disciplinary
Written notice of allegations
You must be told in writing what the allegations are before any formal hearing, with enough detail to prepare your response.
Right to be accompanied
You can bring a work colleague or trade union representative to the hearing. They can address the hearing but not answer questions on your behalf.
Access to evidence
You should see all the evidence the employer plans to rely on, including witness statements and documents, before the hearing.
Reasonable time to prepare
You must be given adequate notice of the hearing date and time to prepare your case and arrange representation.
Right to appeal
You have the right to appeal the outcome. The appeal should be heard by someone more senior who was not involved in the original decision.
Written reasons for the decision
The employer must give you the decision in writing, including the reasons and any sanction, within a reasonable time after the hearing.
What to do if you're facing disciplinary action
- 1Read your employer's disciplinary policy carefully — it should be in your staff handbook or contract.
- 2Request all evidence and witness statements in writing before the hearing so you can prepare.
- 3Arrange for a companion (colleague or trade union rep) to attend the hearing with you.
- 4Prepare a written response to each allegation, noting your version of events and any supporting evidence.
- 5Take detailed notes during the hearing, or ask your companion to do so.
- 6Keep copies of all correspondence, letters, and meeting notes.
- 7If you disagree with the outcome, submit a written appeal within your employer's stated timeframe.
- 8Consider seeking advice from ACAS, Citizens Advice, or a qualified employment solicitor early on.
Tip: Use EmploymentCase to log all disciplinary issues, upload evidence, track communications, and build a chronological timeline of events. Having everything organised can make a significant difference if you later need to make a tribunal claim.
Common mistakes employers make
If your employer makes these errors, it may strengthen a potential unfair dismissal claim:
- Failing to carry out a reasonable investigation before the hearing
- Not providing written details of the allegations in advance
- Denying the right to be accompanied at the hearing
- Having the same person investigate, conduct the hearing, and make the decision
- Reaching a decision before the hearing takes place
- Failing to offer an appeal or having the appeal heard by the same person
- Dismissing for a first offence without considering alternatives (e.g. warnings)
- Not considering mitigation, such as length of service or previous good record
The 2-year qualifying period explained
To bring a claim for ordinary unfair dismissal, you generally need 2 years' continuous service (1 year in Northern Ireland). This means if you are dismissed after less than 2 years, you usually cannot claim ordinary unfair dismissal.
However, there are important exceptions that apply from day one of employment:
Discrimination (Equality Act 2010)
If the disciplinary process or dismissal is motivated by discrimination (age, disability, race, sex, etc.), you can bring a claim with no qualifying period.
Whistleblowing (PIDA)
If you are disciplined or dismissed for making a protected disclosure, this is automatically unfair with no qualifying period.
Automatic unfair dismissal
Certain reasons — pregnancy, health and safety, asserting a statutory right, jury service — are automatically unfair with no qualifying period.
Breach of contract
If the employer breaches your contract (e.g. fails to follow the disciplinary procedure in your contract), you may have a breach of contract claim regardless of service length.
Time limits are strict
If you want to take a disciplinary matter to an employment tribunal, the standard time limit is 3 months less 1 day from the date of the decision (e.g. the date of dismissal). ACAS early conciliation pauses this clock temporarily. Do not delay — seek advice promptly.