Employment Grievance Procedure UK: How to Raise a Formal Complaint at Work

Overview

A grievance is a concern, problem or complaint an employee raises with their employer about work. It might relate to pay, workload, holiday, bullying, discrimination, unfair treatment, health and safety, working relationships, disciplinary action, contract changes, or the way a manager has handled a problem.

In many workplaces, the grievance process has two stages:

• Informal resolution — raising the issue with a manager, HR, or another appropriate person to see whether it can be sorted out quickly.
• Formal grievance — putting the complaint in writing and asking the employer to deal with it under its grievance policy.

Not every problem should be handled informally first. If the matter is serious, sensitive, or involves the person who would normally deal with it, going straight to a formal grievance may be more appropriate. That can apply in cases involving harassment, discrimination, victimisation, whistleblowing concerns, repeated bullying, or disputes where informal discussions have already broken down.

The point of a grievance is not simply to record that you are unhappy. It is to give the employer a fair opportunity to investigate, respond, and put things right. A good grievance letter helps because it tells the employer exactly:

• what happened,
• when it happened,
• who was involved,
• why you say it was wrong,
• what evidence exists, and
• what outcome you want.

That makes the process easier for everyone, including you. A clear written complaint also creates a record if the issue later becomes an appeal, an ACAS early conciliation matter, or an employment tribunal claim. It is not a substitute for legal advice, but it is often the document that shapes everything that follows.

Before you start, check three things:

1. Your employer’s grievance policy — usually in the handbook, intranet, contract pack or HR portal.
2. The right decision-maker — if your line manager is involved, the grievance may need to go to HR or a more senior manager.
3. Timing — workplace disputes often become harder to resolve when left to drift. If limitation periods may matter later, delay can also create legal risk. If you may need a formal claim, keep an eye on time limits and, if useful, read our UK Limitation Periods Guide: How Long You Have to Bring a Claim.

Step-by-step workflow

Use this process if you are wondering how to raise a grievance UK employers can deal with properly and fairly.

1. Define the problem in plain language

Start by reducing the issue to one or two sentences. For example:

• “I am raising a formal grievance about repeated bullying comments from my manager.”
• “I am raising a grievance about unpaid wages and incorrect payslips.”
• “I am raising a grievance about the handling of my flexible working request.”

This sounds basic, but it matters. A grievance that tries to cover every frustration from the last two years without a clear central complaint is harder to investigate and easier for the employer to respond to in general terms.

2. Separate facts from conclusions

Create a short timeline. List dates, meetings, emails, incidents, and any steps you already took to resolve the issue. Then separate:

• Facts — what was said, done, sent, changed or refused.
• Impact — stress, loss of pay, missed opportunities, damaged working relationships, sickness absence, or feeling unable to work safely.
• Your concern — why you believe the conduct or decision was unfair, unreasonable, discriminatory, retaliatory, or inconsistent with policy.

If you are not sure whether something was legally unlawful, you do not need to overstate it. It is often enough to say that you are concerned the treatment may have breached policy, your contract, or workplace rights, and that you want the matter investigated.

3. Gather the key documents

Useful records may include:

• emails, messages and meeting invites,
• payslips and rota records,
• copies of previous complaints,
• notes made at the time of incidents,
• appraisal documents or disciplinary letters,
• sickness records or fit notes where relevant,
• the relevant policy, handbook or contract clause.

A common mistake is attaching everything. A better approach is to attach the most important documents and refer to the rest in a list. If you need personal data or records from your employer to understand what happened, a data rights request may sometimes help. For broader guidance, see Subject Access Request UK: What You Can Ask For and When a SAR Can Be Refused.

4. Decide whether to try informal resolution first

If the issue is capable of quick repair, an informal discussion may save time and stress. You might ask for:

• a meeting with your manager,
• HR involvement,
• mediation,
• clarification of duties or pay,
• an apology and change in behaviour,
• a review of a recent decision.

But informal steps are not always suitable. If there is a serious breakdown in trust, a conflict of interest, or a concern that raising matters casually will expose you to retaliation, a formal written grievance may be the safer route.

5. Write the formal grievance

Your grievance should be professional, specific, and easy to follow. A practical structure is:

1. Subject line: “Formal Grievance”
2. Opening: state that you are raising a formal grievance under the workplace complaint procedure
3. Summary of complaint: one short paragraph
4. Chronology: key events in date order
5. Evidence: attached documents or references
6. Impact on you: practical and professional effects
7. Outcome sought: what you want the employer to do
8. Request: ask for the matter to be investigated and for a grievance meeting

Example wording:

I am writing to raise a formal grievance under the company grievance procedure. My complaint concerns repeated comments and conduct by [name/role], which I believe have created an unfair and difficult working environment. I set out below the key incidents, the impact on me, and the outcome I am seeking. I would be grateful if this matter could be investigated and a grievance meeting arranged.

You do not need legal jargon. In fact, a simple, factual tone is usually better than an angry or highly technical letter.

6. Send it to the right person and keep proof

Follow the policy if it says where grievances should go. If there is no clear route, send it to HR and the appropriate senior manager. Keep:

• the final version of your grievance,
• proof of sending,
• all replies,
• a folder containing your chronology and attachments.

If you submit through an HR portal, save screenshots or download copies where possible.

7. Prepare for the grievance meeting

Most formal grievance at work UK procedures involve a meeting. This is your chance to explain the complaint and answer questions. Before the meeting:

• review your grievance and timeline,
• identify the two or three most important issues,
• note any witnesses,
• prepare a short opening summary,
• check whether you can bring a companion.

At the meeting, stay focused on the main complaint. It is easy to be drawn into arguments about personality or side issues. Keep coming back to facts, examples, and the outcome you are asking for.

8. Confirm anything important in writing afterwards

After the meeting, send a calm follow-up email if needed. You might confirm:

• documents discussed,
• corrections to any misunderstanding,
• additional evidence you agreed to provide,
• the remedy you are seeking.

This helps if the minutes are incomplete or if key points were not captured accurately.

9. Review the outcome carefully

The employer should respond in writing after investigating. The outcome may uphold all, part, or none of the grievance. Read it closely and ask:

• Did it address each issue I raised?
• Was the investigation broad enough?
• Were obvious witnesses or documents ignored?
• Does the outcome explain the reasoning?
• Have practical remedies actually been offered?

A weak outcome is not always one that disagrees with you. It may be one that avoids the main points, offers conclusions without reasons, or promises action in vague terms only.

10. Appeal if necessary

If the grievance is rejected or only partly upheld and you think the decision was flawed, appeal in writing within the deadline set by the policy. Good appeal grounds often include:

• the investigation missed key evidence,
• the decision misunderstood the facts,
• the remedy was inadequate,
• there was a conflict of interest or procedural unfairness,
• new evidence has emerged.

An appeal should not simply repeat the original grievance. Explain what was wrong with the outcome and what you want the appeal manager to do differently.

11. Consider the next route if the process fails

If the workplace complaint procedure ends without resolving the issue, your next steps depend on the nature of the problem. That could include internal mediation, union support, ACAS early conciliation, or independent legal advice. If there is a data handling issue in the background, such as misuse of personal information or refusal to provide records, separate data rights routes may also be relevant; see How to Complain to the ICO: A UK Guide to Data Protection Complaints.

Tools and handoffs

A grievance process runs more smoothly when you know which tool to use at each stage and when the matter should move from one person or route to another.

Useful tools

• A chronology document — one page if possible, with dates and key events.
• An evidence index — a numbered list of attachments so nothing gets lost.
• A grievance draft — written clearly enough that someone new to the issue can understand it quickly.
• A meeting note sheet — your main points, questions, and desired outcome.
• A deadline tracker — note policy deadlines, meeting dates, appeal dates, and any external time limits.

Who may handle your complaint

Depending on the issue, the handoff may move between:

• your line manager,
• another manager,
• HR,
• a senior decision-maker for appeals,
• a union representative or workplace companion,
• an external conciliator or adviser later on.

If the complaint is about your line manager, say so plainly and ask for an alternative person to manage the grievance. If the complaint concerns a broader culture issue, a senior HR lead or independent manager may be more appropriate.

When to move from informal to formal

You should usually consider a formal grievance when:

• informal discussions have failed,
• the issue is serious enough to require investigation,
• there is a paper trail already,
• you need a formal record,
• you are concerned about retaliation or procedural fairness.

When to think beyond the grievance process

Internal procedures are important, but they are not the only route. If your concern involves pay, discrimination, dismissal, whistleblowing, or other significant workplace rights, there may be external steps to consider in parallel or afterwards. The key point is not to assume that an open grievance automatically protects your position on deadlines. Keep a written timeline and review it regularly.

Quality checks

Before sending your complaint, run through this checklist. It can improve both the tone and the effectiveness of your grievance.

Is the complaint specific?

A strong grievance identifies incidents, dates, and decisions. A weak one relies on broad statements such as “I have been treated badly for months” without examples.

Is the tone professional?

You can be firm without sounding abusive or sarcastic. A grievance is more persuasive when it reads like a serious workplace document rather than a message written in anger.

Have you asked for a realistic outcome?

You do not have to know the exact remedy the employer will choose, but it helps to say what would resolve matters from your perspective. Examples might include payment of arrears, correction of records, a change of reporting line, training, a fair review of a decision, or a proper investigation.

Have you attached the right evidence?

Too little evidence makes the complaint vague. Too much can bury the key points. Include enough to support your main allegations and keep a reserve file for later if needed.

Have you checked the policy?

Policies often contain practical details about where to send the grievance, who will hear it, and whether there is an appeal stage. Following the stated process can reduce avoidable delay.

Have you protected your own record?

Keep copies of everything, including meeting invites, minutes, letters and appeals. If you later need to explain the history to ACAS, an adviser, or a tribunal, your own file matters.

Have you avoided unnecessary legal overstatement?

Unless you are sure of the legal basis, avoid turning the grievance into a list of legal accusations that you cannot clearly support. It is usually enough to explain the conduct, why you say it was wrong, and what investigation you want.

Simple grievance checklist

• I know who the grievance is being sent to.
• I have identified the main complaint clearly.
• I have included key dates and incidents.
• I have attached the most important evidence.
• I have explained the impact on me.
• I have said what outcome I want.
• I have checked deadlines for grievance and appeal stages.
• I have saved copies of everything sent and received.

When to revisit

This is a process worth revisiting whenever your position changes. Do not treat a grievance as a one-off letter and then wait passively. Review your next step if any of the following happens:

• Your employer updates its grievance policy — check whether the route, timescales, or appeal process has changed.
• New evidence appears — for example, emails, witness information, or notes from meetings.
• The issue gets worse after you complain — keep records and consider whether you need to update the grievance or raise a separate concern.
• You move from informal talks to a formal stage — rewrite the complaint as a structured document rather than relying on old email chains.
• You receive an outcome letter — review whether it answered your actual complaint and whether an appeal is needed.
• You are considering external action — check time limits, gather papers, and organise your chronology.

A practical next step today is to create a grievance file with five items: your contract or handbook, the grievance policy, a one-page timeline, your key evidence, and a draft letter. Even if you are not ready to send a formal complaint now, that file will make the process much easier if you need it later.

If your wider problem also touches on other areas of civil complaints, our guides may help you compare routes and keep paperwork in order. For example, if your issue involves data handling, see our ICO and subject access request guides. If deadlines may become important in any dispute, keep our limitation periods guide bookmarked. The same principle applies across complaints work: clear records, sensible escalation, and timely action usually put you in the strongest position.

In short, the best employment grievance UK approach is rarely the most dramatic one. It is usually the most organised. State the issue clearly, follow the workplace complaint procedure, keep your evidence in order, appeal where necessary, and revisit the process each time the facts, policy, or deadlines change.