What is a fair disciplinary procedure?

Under the ACAS Code of Practice on disciplinary and grievance procedures, a fair process means: establishing the facts first (an investigation, without unreasonable delay), telling you in writing what you are accused of with enough detail and evidence to prepare, holding a disciplinary hearing where you can state your case with a companion, giving a written decision that fits the seriousness of the issue, and offering a right of appeal. In misconduct cases, where practicable, different people should carry out the investigation and the hearing. Skipping these steps can make a dismissal unfair and lets a tribunal adjust compensation by up to 25%.

Who can come with me to a disciplinary hearing?

You have a statutory right to be accompanied (section 10, Employment Relations Act 1999) at any disciplinary hearing that could result in a formal warning, other disciplinary action, or the confirmation of one on appeal. Your companion can be a colleague, a trade union official, or a certified trade union representative. They can present your case, sum it up and confer with you, but cannot answer questions on your behalf. If your companion cannot attend, you can propose a reasonable alternative time within 5 working days of the original date and the employer must postpone.

How long does a written warning last?

There is no law that sets a warning's lifespan — it is set by your employer's disciplinary policy. The ACAS guide suggests a first written warning typically stays live for around 6 months and a final written warning for around 12 months (sometimes longer in exceptional cases). The warning letter should tell you exactly how long it lasts, what improvement is expected, and what happens if there is further misconduct while it is live. Once the period passes with satisfactory conduct, the warning should stop counting.

What if my employer skips the disciplinary process and just sacks me?

Even where the alleged misconduct is serious, a fair procedure is still required — dismissing without any investigation, hearing or appeal can make the dismissal unfair (usually needing 2 years' service to claim, with exceptions for automatically unfair reasons). A tribunal can also increase compensation by up to 25% where the employer unreasonably failed to follow the ACAS Code. The deadline is strict: ACAS early conciliation, then usually 3 months less one day from the dismissal. Get free advice from ACAS on 0300 123 1100 or Citizens Advice.

Facing a disciplinary at work? The fair process, your rights & how to respond

Q: Can I be suspended during a disciplinary investigation?

Yes, but only in limited situations — for example where there is a risk to people, evidence or the business. ACAS guidance is clear that suspension is not a punishment and does not mean you have done anything wrong: it should normally be on full pay, kept as brief as possible, and reviewed regularly. Most disciplinary situations do not need suspension at all. Suspension without pay, or a long unexplained suspension, is worth challenging and taking advice on.

The fair process — what your employer must do, step by step

Formal disciplinary action is covered by the ACAS Code of Practice on disciplinary and grievance procedures. It isn’t optional window-dressing: tribunals can adjust compensation by up to 25% where an employer unreasonably fails to follow it. The fair shape is always the same ladder:

Step	What should happen
1 · Investigation	The employer establishes the facts first, without unreasonable delay. That may include an investigatory meeting with you — which is not the disciplinary hearing, and should never by itself result in disciplinary action. In misconduct cases, where practicable, different people should investigate and hear the case.
2 · The letter	If there’s a case to answer, you get it in writing: what you’re accused of with enough detail to prepare, copies of the evidence (statements, documents), the possible outcomes, the hearing time and place, and a reminder of your right to be accompanied.
3 · The hearing	Held without unreasonable delay but with reasonable time for you to prepare. The employer explains the allegation and evidence; you answer it, present your own evidence and witnesses, and ask questions — with your companion beside you.
4 · The outcome	A decision in writing, proportionate to the facts: no action, a first written warning, a final written warning, or — for sufficiently serious or repeated matters — dismissal or another sanction your contract allows (such as demotion).
5 · The appeal	You can appeal every formal outcome, in writing. It should be heard impartially — wherever possible by a more senior manager who wasn’t previously involved — and you have the right to be accompanied again.

One honest nuance: the statutory right to be accompanied does not apply to a pure investigatory meeting — only to hearings that could result in formal action. Many employers allow a companion at investigation stage anyway (check your disciplinary policy), and if the “investigation meeting” starts to feel like a disciplinary hearing, say so and ask for it to be adjourned.

Suspension — not a punishment

Most disciplinaries involve no suspension at all. Where it happens (risk to people, evidence or the business), ACAS guidance is clear: suspension is not a disciplinary sanction and doesn’t mean you’ve done anything wrong — it should normally be on full pay, kept as brief as possible and reviewed regularly, with a named contact keeping you informed. The same framing applies to gross misconduct cases.

Breathe — a disciplinary is not a dismissalMost disciplinaries end in a warning or nothing at all, not the sack. The process exists precisely so both sides get heard before anything is decided. Prepare well, engage calmly, bring your companion — and remember the outcome has to be proportionate to what the evidence actually shows.

The warnings ladder — and how long a warning really lasts

Unless the allegation is gross misconduct (which can justify dismissal without prior warnings — though still never without a fair process), discipline normally climbs a ladder:

Informal word first — many issues should be resolved with a quiet, informal conversation before anything formal starts. This informal stage is common practice, not part of the statutory Code.
First written warning — sets out the misconduct or performance issue, the improvement required and by when, how long the warning stays live, and what happens next if it recurs.
Final written warning — for further misconduct while a warning is live, or a first offence serious enough to justify it.
Dismissal or other sanction — further misconduct on a live final warning, with notice (unlike gross-misconduct dismissal). Alternatives like demotion or transfer are only lawful if your contract or the policy allows them.

How long do warnings last? No statute sets this — it’s your employer’s policy. The ACAS guide suggests a first written warning typically stays live for around 6 months and a final written warning around 12 months (occasionally longer in exceptional cases). The warning letter must tell you its lifespan; after that period of satisfactory conduct it should stop counting against you.

Never skip the hearingHowever unfair it feels, do not refuse to engage or fail to turn up — if you don’t attend without good reason, the hearing can go ahead without you and decide on the evidence it has. If you genuinely can’t attend (illness, or your companion is unavailable), ask promptly for it to be rearranged rather than going silent. Attending and stating your case calmly is how disciplinaries get downgraded or dropped.

Your rights at the hearing — the companion and the 5-day rule

At any disciplinary hearing that could result in a formal warning or other disciplinary action (and at any appeal), you have a statutory right to be accompanied under section 10 of the Employment Relations Act 1999. Your companion can be:

a colleague (a fellow worker at the same employer),
a trade union official, or
a certified trade union representative — you don’t have to be a union member for a union official to accompany you, if they agree.

Your companion can present and sum up your case, respond on your behalf to views expressed, and confer with you during the hearing — but they cannot answer questions put directly to you. Requesting a companion is a protected right: you must not suffer any detriment for asking.

If your companion can’t make it

You can propose a reasonable alternative time within 5 working days of the date the employer proposed — and the employer must postpone the hearing to it. Use this rather than attending alone or not attending at all.

Practical extras worth asking forAsk for the hearing to be minuted and for a copy of the notes afterwards; ask for any reasonable adjustments you need (disability, health condition); and if new evidence appears for the first time at the hearing, ask for an adjournment to consider it. A reasonable employer says yes to all three.

How to respond — preparing your side properly

Disciplinaries are decided on evidence and credibility. The preparation below wins hearings:

Read the allegation precisely. What exactly are you accused of, on what dates, under which policy? If the letter is vague, write back asking for the specifics and the evidence — the ACAS Code says you should have enough detail to answer the case.
Gather your own evidence. Emails, messages, rotas, timesheets, training records, targets, anything showing context — and the names of witnesses who support your account (ask for them to be interviewed or to give short written statements).
Write a short factual statement. Your account in date order, calm and specific — what happened, why, and any mitigation (workload, unclear instructions, health, personal circumstances, a clean record). Bring copies for everyone.
Arrange your companion early — and use the 5-working-day rearrangement right if they can’t attend.
At the hearing: stay calm and factual. Answer what’s asked, correct errors politely, don’t exaggerate or speculate, and let your companion sum up. Losing your temper is the only way to lose a hearing you should win.
Afterwards: appeal if you disagree. Put your appeal in writing within the deadline in the outcome letter, saying exactly why the finding or sanction is wrong (procedure, evidence, proportionality, inconsistency with how others were treated). Keep copies of everything.

Dismissed with no fair process?If you were sacked with no investigation, no hearing or no appeal — or the process was a sham — that can make the dismissal unfair (usually 2 years’ service to claim, with day-one exceptions for automatically unfair reasons), and a tribunal can increase compensation by up to 25% for unreasonably ignoring the ACAS Code. The clock is brutal: ACAS early conciliation, then usually 3 months less one day from dismissal. Start at unfair dismissal and employment tribunal — today, not after the appeal concludes.

Do this now

Reply to the invite letter today: ask for the exact allegation in writing, copies of all the evidence, the possible outcomes, and confirm you’ll be bringing a companion — then arrange that companion and start your written statement. If the hearing date doesn’t work for them, propose a new time within 5 working days.

Employer letter you don’t understand? Put it through Decode. Need the response drafted? Use the Letter Machine. This is general information, not legal advice — for advice on your own case, contact ACAS (0300 123 1100) or Citizens Advice (free).

Scotland & Northern Ireland

Scotland — the ACAS Code and the section 10 right to be accompanied apply in England, Wales and Scotland alike, and tribunal claims run through the same employment tribunal system.
Northern Ireland — has its own framework: the Labour Relations Agency (rather than ACAS) publishes the equivalent Code of Practice, statutory procedures differ, and claims go to industrial tribunals. Start at nidirect and the LRA if you work in NI.

Related guides — work & rights

Gross misconduct Raise a grievance Unfair dismissal Employment tribunal Settlement agreements

Source verification Primary sources: ACAS — Code of Practice on disciplinary and grievance procedures + the disciplinary procedure step-by-step guidance and suspension guidance (acas.org.uk), GOV.UK — Taking disciplinary action against an employee / Disciplinary procedures and action, and the Employment Relations Act 1999 s.10 (legislation.gov.uk). Last verified 3 July 2026 — the fair-process steps (establish the facts without unreasonable delay; the investigatory meeting is distinct from the disciplinary hearing and should not itself result in disciplinary action; where practicable different people investigate and hear misconduct cases; written notification with enough detail, evidence copies and possible outcomes; a hearing with reasonable time to prepare; a written outcome; an appeal heard impartially, wherever possible by a manager not previously involved) are the ACAS Code verbatim framework. Right to be accompanied: statutory under s.10 Employment Relations Act 1999 at hearings that could result in a formal warning or other disciplinary action (and appeals) — companion = colleague, trade union official or certified union rep; can present/sum up/confer but not answer questions for the worker; no statutory right at a pure investigatory meeting (employer policy may allow one — stated honestly); companion-unavailable postponement to a reasonable alternative within 5 working days of the proposed date (s.10(4)–(5)). Warning lifespans: employer-policy, not statute — the ACAS guide’s suggested ~6 months (first written) / ~12 months (final written) stated qualitatively. Suspension: ACAS suspension guidance — exceptional, not a punishment, normally full pay, brief and regularly reviewed (consistent with the /gross-misconduct page). Tribunal context: unreasonable failure to follow the ACAS Code → award adjustment of up to 25% either way (s.207A TULRCA 1992); unfair-dismissal qualifying service usually 2 years and the 3-months-less-a-day / ACAS early-conciliation route per the /employment-tribunal and /unfair-dismissal pages. Confidence: High — the Code and s.10 are long-stable law; warning durations flagged as guidance, not entitlement. Scope: England, Wales & Scotland; Northern Ireland’s separate LRA Code and industrial tribunals stated qualitatively. Not legal advice.

Disciplinaries at work — common questions

What counts as a fair disciplinary procedure?

The ACAS Code shape: investigate the facts first, tell you the allegation in writing with the evidence and possible outcomes, hold a hearing you can bring a companion to with reasonable time to prepare, give a written proportionate outcome, and offer an appeal. Where practicable, different people should investigate and hear a misconduct case. Skipping steps can make a dismissal unfair and cost the employer up to 25% extra at tribunal.

Can I bring someone to the disciplinary meeting?

To the hearing and any appeal, yes — a colleague, a trade union official or a certified union rep, by statutory right. They can present your case and confer with you but not answer questions for you. At a pure investigatory meeting there’s no statutory right, though many employers allow it. If your companion can’t attend, propose a new time within 5 working days and the employer must postpone.

How long does a written warning stay on my record?

Whatever your employer’s policy says — the letter must tell you. ACAS suggests around 6 months for a first written warning and around 12 months for a final written warning as typical. After the stated period of satisfactory conduct it should stop being “live” and can’t fairly be counted for future discipline.

I’ve been suspended — does that mean I’m being sacked?

No. Suspension is not a punishment and not a finding of guilt — ACAS says it should be exceptional, normally on full pay, as brief as possible and kept under review, with a named contact keeping you informed. Use the time to prepare your response. Suspension without pay or with no explanation is worth challenging with advice from ACAS or Citizens Advice.

Should I appeal a warning I think is unfair?

Usually yes — appeal in writing within the deadline in the outcome letter, saying exactly why it’s wrong: flawed procedure, evidence not considered, a sanction out of proportion, or harsher treatment than colleagues in the same position. Appealing costs nothing, can downgrade or remove the warning, and shows reasonableness if the dispute ever escalates. If you were dismissed, notify ACAS early conciliation in parallel — the appeal does not pause the 3-month tribunal clock.

Sources: Fair process, companion right, warnings & suspension · ACAS — Code of Practice on disciplinary and grievance procedures · ACAS — Disciplinary procedure step by step · Employment Relations Act 1999, s.10. SortedUK is not a law firm and this is general information, not legal advice. Last reviewed: 3 July 2026.

Facing a disciplinary at work — the fair process, your rights & how to respond