A disciplinary hearing does not have to come with exactly 48 hours’ notice under ACAS rules. Instead, ACAS says you must be given “reasonable” notice so you have enough time to understand the allegations, review the evidence, arrange a companion and prepare your response.
In straightforward cases, 48 hours may be enough. In more serious or complex cases, you should usually receive several days or even a week to prepare.
Key points:
- There is no legal rule that says a disciplinary hearing must be held after exactly 48 hours.
- ACAS focuses on whether the notice is reasonable in your circumstances.
- You should receive written details of the allegations, evidence and possible outcome.
- You have the right to be accompanied by a colleague or trade union representative.
- If 48 hours is not enough time, you can ask for the hearing to be postponed.
- An employer who refuses reasonable extra time could risk making the process unfair.
Does ACAS Require 48 Hours’ Notice for a Disciplinary Hearing?
No. ACAS does not set a strict minimum notice period of 48 hours for a disciplinary hearing. The official guidance says the hearing should happen as soon as possible after the investigation, while still giving you a reasonable time to prepare.
That means the correct amount of notice depends on the seriousness of the allegation, how much evidence there is and whether you need time to arrange a companion.
In practice, many employers use 48 hours as a minimum guideline because it gives you at least some time to read the evidence and organise representation.
However, that is only a starting point. If the allegation is simple and there are only a few documents to review, two days may be enough. If there are witness statements, emails or allegations of gross misconduct, you should usually be given longer.
As one employment law guide explains, “giving your employee less than 48 hours to review evidence and organise someone to accompany them in the meeting is not enough time.” Another common recommendation is that around five working days is more suitable for most cases.
What Does ACAS Mean by “Reasonable Notice” Before a Disciplinary Hearing?
Reasonable notice means enough time for you to prepare properly before the hearing takes place. ACAS does not define a specific number of hours or days because every disciplinary case is different. Instead, employers are expected to look at what you need in order to respond fairly.
Reasonable notice normally includes enough time to:
- Read the allegations carefully
- Review any witness statements, emails or other evidence
- Gather your own evidence or documents
- Speak to any witnesses you want to bring
- Arrange for a work colleague or trade union representative to attend with you
- Prepare what you want to say at the meeting
If your employer sends you a long bundle of documents on Friday afternoon and asks you to attend a hearing on Monday morning, that may not be reasonable. Equally, if the allegation is straightforward and the employer provides all the relevant information clearly, 48 hours could be seen as reasonable.
ACAS also expects employers to explain the possible outcome in advance, including whether the hearing could lead to a warning or dismissal. Without enough notice to prepare for those consequences, the procedure may not be fair.
Is 48 Hours Enough Time to Prepare for a Disciplinary Meeting?
Whether 48 hours is enough depends on the circumstances of your case. ACAS does not say that two days is always enough or always unfair. The real test is whether you can reasonably prepare.
In many workplaces, 48 hours is treated as the bare minimum. It may be acceptable for a simple issue where there is only a small amount of evidence and the possible outcome is limited to a first warning. However, it is often not enough where there are serious allegations or a large amount of information to review.
When Can 48 Hours Be Considered Reasonable Notice?
Forty-eight hours can be reasonable if the case is simple and you already understand what the issue is. For example, if the allegation concerns a single incident, such as arriving late or breaking a workplace rule, you may not need much time to prepare.
You are more likely to have had reasonable notice where:
- The allegation is clear and straightforward
- There are only a few pages of evidence
- The employer has already discussed the issue with you informally
- The hearing is unlikely to lead to dismissal
- You can easily arrange for a colleague or union representative to attend
For example, imagine you receive a letter on Tuesday explaining that you are attending a hearing on Thursday about repeatedly missing a reporting deadline.
The employer includes copies of the emails and tells you that the likely outcome is a first written warning. In that situation, 48 hours may be enough time.
One employer explains that “48 hours’ notice is often bandied about and in a lot of circumstances will be reasonable”. That is especially true where the allegation is minor and there is very little dispute about the facts.
A business adviser interviewed about short-notice hearings said:
“For simple misconduct cases, two days can be enough if the employee has all the information immediately. The key issue is not the number of hours, but whether the employee can genuinely prepare before the meeting.”
When Should You Be Given More Than 48 Hours to Prepare?
You should usually be given more than 48 hours if the hearing is more serious or there is a lot of evidence to consider. The more complex the case, the more time you need.
You may need additional time if:
- The hearing could lead to dismissal
- You are accused of gross misconduct
- There are several allegations against you
- You have received witness statements or a large evidence pack
- You need to speak to witnesses yourself
- Your chosen companion is unavailable at short notice
- You need advice from a trade union or solicitor
Most employment specialists recommend around five working days for more serious cases. Some employers give even longer if there are many documents to review. One legal guide states that, depending on the complexity of the case, one week is often sufficient notice for a disciplinary hearing.
A typical example might involve an accusation of gross misconduct based on several months of emails, CCTV footage and witness evidence. If you only receive 48 hours to review everything, it may be very difficult to prepare your defence properly. In that situation, you would have good reason to ask for the hearing to be delayed.
A Citizens Advice adviser quoted in competitor material explained it this way:
“If you need more time to consider the evidence they have given you, you can ask for the meeting to be postponed so you have extra time. The amount of time you ask for should be reasonable.”
Why Do Complex Disciplinary Cases Usually Require More Time?
Complex disciplinary cases take longer because there is more information to understand and more at stake. If you are facing a serious allegation, rushing the process increases the risk of mistakes and unfairness.
The following situations and preparation steps are common reasons why you may need more than 48 hours to prepare for a disciplinary hearing:
| Complex Issue or Preparation Step | Why More Time Is Needed |
| Several incidents or allegations | You may need to review each allegation separately and prepare a clear response to every point. |
| Multiple witnesses | Reading witness statements and comparing different accounts can take time, especially if they do not match. |
| Technical or financial evidence | Specialist records, reports or figures may require careful review before you can respond properly. |
| Claims of discrimination, harassment or bullying | These cases are often sensitive and may involve detailed evidence from several people. |
| Possible dismissal for gross misconduct | Because the outcome could affect your job, you should have enough time to prepare fully. |
| Reading and organising a large number of documents | This helps you understand the case clearly and avoid missing important information. |
| Identifying gaps or inconsistencies in the evidence | You may find mistakes, missing details or contradictions that support your side of the story. |
| Gathering your own emails, records or witness statements | Your own evidence can help challenge the allegations and explain what happened. |
| Preparing questions for witnesses | Asking the right questions can highlight weaknesses in the employer’s case. |
| Taking advice from a union representative | A representative can help you understand your rights and decide how best to respond. |
If you do not have enough time, you may attend the hearing without fully understanding the case against you. That can leave you unable to challenge incorrect information or explain your side properly.
An employment lawyer speaking about complex disciplinary cases said:
“Normally five working days’ notice for a disciplinary hearing is sufficient. Employers cannot pull an employee into the office immediately after an incident and expect a fair process.”
Where a hearing could result in dismissal, ACAS expects employers to follow a full and fair procedure. That includes giving you enough time to prepare. If they do not, an employment tribunal may later decide that the disciplinary process was unfair.
What Information Should Your Employer Give You Before the Hearing?
Before the hearing, your employer should write to you and explain exactly why you are being invited. You should receive enough information to understand the case against you and prepare your response. ACAS says this should be given “in good time” before the meeting.
Your employer should normally provide:
- A clear explanation of the alleged misconduct or performance issue
- The date, time and location of the hearing
- Copies of all the evidence they plan to rely on
- Any witness statements or investigation notes
- Details of the possible outcome, including whether dismissal is being considered
- Information about your right to be accompanied
The letter should not be vague. It should tell you exactly what is being alleged and when it supposedly happened. If the employer intends to rely on CCTV, emails, attendance records or witness evidence, you should receive copies before the hearing.
You should also be told who will chair the hearing and whether anyone else, such as HR or witnesses, will attend.
One ACAS guide explains that the hearing letter should include
“the alleged misconduct, any evidence from the investigation, the possible outcomes and information on the employee’s right to be accompanied”. If your employer has not given you that information, you should ask for it before the meeting goes ahead.
What Should You Do if You Receive Less Than 48 Hours’ Notice?
Receiving less than 48 hours’ notice can feel stressful, especially if you have not been given the evidence yet. However, you do not have to accept an unfairly short timescale without raising concerns.
The first step is to read the invitation carefully and work out whether you have enough time to prepare. If you do not, you should contact your employer straight away and explain why. Keep the request polite and in writing so there is a clear record.
Can You Ask to Postpone a Disciplinary Hearing?
Yes. You can ask to postpone the hearing if you do not have enough time to prepare or if your companion cannot attend.
There is nothing in ACAS guidance that prevents you from asking for more time. In fact, asking for a short delay can help make sure the process is fair. You should explain clearly why the current date is not reasonable.
Common reasons include:
- You have not received all the evidence
- You need time to review a large number of documents
- Your chosen companion is unavailable
- You are off sick or dealing with an emergency
- You need time to speak to witnesses
If your companion cannot attend, the law says you can suggest another date within five working days of the original hearing. Your employer should normally agree to this.
For example, if you receive notice on Monday for a Wednesday hearing but your union representative is unavailable until Friday, you can ask for the meeting to be moved.
A trade union representative said:
“The hearing should not become a race against the clock. Employees need enough time to understand the allegations and arrange proper support before attending.”
How Should You Request More Time to Prepare?
The best way to request more time is by email or letter. That way, you have written proof that you asked for a postponement and explained your reasons.
Your request should include the date of the hearing, explain why you need more time, identify any information or evidence that is missing, and suggest when you would be available instead.
Keep the tone calm and professional. You do not need to argue about the allegation itself at this stage. Focus on why the short notice makes it difficult to prepare properly.
For example, you could write:
“I have received notice of the disciplinary hearing scheduled for Thursday. I do not believe I have had sufficient time to review the evidence and arrange representation. I would be grateful if the hearing could be postponed until next week so I can prepare fully.”
You should also mention if you have not yet received witness statements, copies of emails or other documents, details of the possible outcome, or confirmation of who will attend the hearing.
Citizens Advice says that if you need more time to consider the evidence, you should ask for the meeting to be postponed and request a reasonable extension. Usually, asking for an extra few days is more likely to be accepted than asking for several weeks.
What Happens if Your Employer Refuses to Delay the Hearing?
If your employer refuses to postpone the hearing, you should still put your concerns in writing. Explain that you do not believe you have had enough time to prepare and that you are attending under protest if you decide to go ahead.
At the hearing, you can repeat that concern and ask for it to be recorded in the notes. This may help later if you need to appeal or make a claim.
If the hearing goes ahead anyway, you should:
- Ask for a copy of the notes
- State clearly that you had insufficient notice
- Explain which evidence you were unable to review
- Say if you could not arrange a companion
In some cases, it may still be better to attend rather than refusing completely. If you do not attend without explanation, the employer may continue without you.
However, if the employer goes ahead despite refusing a reasonable request for more time, that could later be used as evidence that the procedure was unfair. Employment tribunals often look at whether the employee had a fair opportunity to prepare and defend themselves. An employer who ignores that risk could face criticism or even a claim for unfair dismissal.
One employment law specialist interviewed about short-notice hearings said:
“A refusal to allow extra preparation time can undermine the whole process. If the employee has not had a fair chance to respond, the outcome may not stand up later.”
What Are Your Rights at a Disciplinary Hearing Under ACAS?
Under ACAS guidance, you have several important rights during a disciplinary hearing. The hearing should give you a genuine opportunity to explain your side before any decision is made.
You have the right to know exactly what allegations are being made against you, receive the evidence before the hearing, be given reasonable notice, bring a companion with you, ask questions and challenge the evidence, present your own documents and witnesses, receive a written decision, and appeal if you disagree with the outcome.
Your companion can be a colleague from work, a trade union representative, or an official employed by a trade union.
Your companion is allowed to speak for you, sum up your case and take notes, although they do not usually answer questions on your behalf.
You should also be treated consistently with other employees. If the employer has handled similar situations differently in the past, that may be relevant.
Importantly, you have the right to a fair process. ACAS says employers should investigate properly, explain the allegations clearly and keep communication confidential throughout.
If you feel rushed, unsupported or unclear about the evidence, you can raise those concerns before or during the hearing.
Can a Disciplinary Hearing Still Go Ahead if You Cannot Attend?
Yes, a disciplinary hearing can sometimes go ahead without you, but ACAS says employers should first try to rearrange it and consider whether another solution would be fairer.
If you cannot attend because you are ill, unavailable or your companion cannot make the date, your employer should normally speak to you before making any decision.
What if Your Companion Cannot Attend the Meeting?
If your chosen companion cannot attend, you have the legal right to suggest another date. The new date should normally be within five working days of the original hearing.
This rule applies if your companion is a work colleague, a trade union representative or a union official. Your employer should usually accept the new date as long as it is reasonable.
For example, if your hearing is on Tuesday but your union representative cannot attend until Thursday, you can ask to move the meeting.
You should tell your employer as soon as possible and explain who your companion is, why they cannot attend and the alternative date you are requesting.
ACAS says the companion should also be given enough time to prepare and review the evidence. If the employer refuses without a good reason, that may be unfair.
Can Your Employer Continue Without You?
Your employer can continue without you in some situations, but only after trying to rearrange the hearing and considering the reasons for your absence.
They may decide to go ahead if:
- You repeatedly fail to attend without good reason
- You refuse to engage with the process
- They believe they have already given you enough opportunity
Before making that decision, the employer should consider:
- The seriousness of the allegation
- Whether you are genuinely unable to attend
- Your previous attendance and work record
- Whether a different format, such as a remote meeting, would help
If the employer decides to continue without you, they should still give you the chance to submit a written statement or evidence before the hearing takes place. They should also send you the decision in writing afterwards and explain your right to appeal.
You should avoid simply ignoring the hearing invitation. If you do not respond, the employer may assume you do not want to take part.
What Should You Do if You Are Off Sick or Unavailable?
If you are off sick or unavailable, contact your employer as soon as possible. Explain why you cannot attend and provide any evidence, such as a fit note, if appropriate.
You can ask for the hearing to be moved to a different date, held in another location, arranged as a video or telephone meeting, or delayed to give you more time to recover or prepare.
ACAS says employers should consider whether another arrangement would make it easier for you to attend. For example, if you are anxious about attending the office, the meeting might take place somewhere else or online.
If you are signed off with stress or another health condition, your employer may ask for medical advice before deciding whether to continue without you. That is particularly common where the delay has become lengthy.
One employee adviser interviewed about sickness absence and disciplinary hearings said:
“Being unwell does not automatically stop the process, but employers should be flexible. Rearranging the hearing is usually the fairest option where the employee genuinely cannot take part.”
What Could Happen if Your Employer Does Not Follow the Acas Disciplinary Procedure?
If your employer does not follow the ACAS disciplinary procedure, the hearing could later be considered unfair. This does not automatically make the disciplinary action invalid, but it can make it much harder for the employer to defend their decision.
For example, problems may arise if your employer:
- Gives you too little notice
- Fails to provide the evidence
- Refuses your right to be accompanied
- Does not allow you to explain your side
If the case reaches an employment tribunal, the judge will consider whether the employer followed the ACAS Code properly. A tribunal can increase compensation by up to 25% where an employer has acted unfairly or ignored the guidance.
Even before that stage, you may be able to challenge the decision through an internal appeal. You can explain that the process was unfair because you were not given enough time or information to prepare.
What Outcomes Can Happen After a Disciplinary Hearing?
After the hearing, your employer should consider the evidence before making a decision. They should then tell you the outcome in writing as soon as possible.
Possible outcomes include:
- No further action
- An informal warning
- A first written warning
- A final written warning
- Demotion or another sanction
- Dismissal
A first written warning is usually used where the issue is not very serious. A final written warning may be given where the allegation is more serious or where you have already had a warning in the past.
Dismissal is normally reserved for gross misconduct or repeated problems after earlier warnings. If dismissal is being considered, you should have been told this before the hearing.
Whatever the outcome, you should also be told about your right to appeal if you think the decision is wrong or unfair.
What is the Best Way to Prepare for a Disciplinary Hearing With Short Notice?
If you have only been given a short amount of notice, focus on the most important steps first. Start by reading the hearing letter and evidence carefully. Make notes about anything you disagree with or do not understand.
Then:
- Gather any emails, messages or documents that support your case
- Write down the key points you want to make
- Contact a colleague or union representative immediately
- Prepare a short timeline of events
- List any questions you want to ask at the hearing
Try not to panic. A short-notice hearing can feel overwhelming, but you still have the right to explain your side and ask for more time if necessary.
If there are gaps in the evidence or you have not had enough time to prepare, raise that issue at the start of the hearing and ask for it to be recorded in the notes. Staying calm, organised and professional will usually put you in a much stronger position.
In short, 48 hours is not a fixed legal rule under ACAS. What matters is whether you have had enough time to prepare properly. In a simple case, two days may be enough. In a more serious or complicated case, you should expect more time and you are entitled to ask for it.
If you receive less than 48 hours’ notice, do not ignore the hearing. Instead, respond quickly, ask for the evidence, request a postponement if necessary and keep everything in writing. Your employer must give you a fair opportunity to understand the allegations and defend yourself.
The strongest approach is to stay calm, gather your documents, arrange a companion and make sure any concerns about short notice are formally recorded. If the process is rushed or unfair, you can raise that in an appeal or, in some situations, at an employment tribunal.
Conclusion
In conclusion, ACAS does not require an exact 48 hours’ notice period for a disciplinary hearing. The key requirement is that you are given reasonable notice based on the seriousness of the allegation and the amount of evidence involved.
In straightforward cases, two days may be enough, but more complex matters often require several days or even a week.
If you receive short notice, do not ignore the invitation. Instead, ask for the evidence, request more time if necessary and keep your concerns in writing. You have the right to prepare properly, bring a companion and understand the possible outcome before the hearing takes place.
A fair disciplinary process should give you a genuine opportunity to respond. If your employer fails to do that, you may have grounds to appeal or challenge the decision later.
FAQs
Can your employer dismiss you at the first disciplinary hearing?
Yes, your employer can dismiss you at the first disciplinary hearing if they believe you committed gross misconduct. However, they must still follow a fair process and warn you beforehand that dismissal is a possible outcome.
How many days’ notice should you normally receive for a disciplinary hearing?
There is no fixed legal number of days, but most employers give between 48 hours and five working days. More notice is usually needed if the case is serious or involves a large amount of evidence.
Can you bring a solicitor to a disciplinary hearing?
You do not usually have a legal right to bring a solicitor to a disciplinary hearing. In most cases, you can only bring a work colleague or a trade union representative unless your employer agrees otherwise.
What happens if you refuse to attend a disciplinary hearing?
If you refuse to attend without a good reason, your employer may decide to continue the hearing without you. That can make it harder for you to explain your side or challenge the allegations later.
Can a disciplinary hearing be held over Zoom or by telephone?
Yes, a disciplinary hearing can take place by video call or telephone if both sides agree or if it is more practical. This is often used when you are off sick, working remotely or unable to attend in person.
Do you have to sign the disciplinary hearing notes?
No, you do not have to sign the notes if you believe they are inaccurate or incomplete. You can ask for corrections or send your own written comments instead.
How long does a written warning stay on your record?
A first written warning usually stays on your record for around six months, while a final written warning often remains for twelve months. The exact period should be explained in your employer’s disciplinary policy or in the outcome letter.
