How to Handle an Employee Grievance Without It Spiralling

That sinking feeling when an employee says the words "I want to raise a formal grievance" is one most business owners will recognise. Your mind immediately goes to the worst case: a tribunal claim, legal costs, weeks of disruption, and a team that notices everything.

Here is the honest truth. A grievance is not automatically a disaster. It only becomes one when it is handled poorly, delayed, or ignored. The employers who get into serious trouble at tribunal are rarely the ones who made a bad judgment call on the substance of the complaint. They are the ones who failed to follow a clear process, did not keep proper records, or tried to make the problem go away quietly rather than dealing with it head-on.

This guide takes you through the formal employee grievance procedure UK law requires, stage by stage. It explains what to do, what to document, and where most employers go wrong. Follow it, and you give yourself the best possible chance of resolving the matter fairly and protecting your business whatever happens next.

Why the First 48 Hours Set the Tone

When an employee raises a grievance, your first response sends a signal. Ignore it, delay it, or attempt to handle it informally when a formal process is clearly what the employee wants, and you immediately risk looking dismissive or untrustworthy. That perception can be just as damaging at an employment tribunal as a procedural error.

Acknowledge the grievance in writing promptly. This does not mean you are agreeing with the employee or conceding anything. It simply means you have received their concern, you are taking it seriously, and you will be in touch shortly about next steps. That acknowledgement alone can de-escalate a situation before it builds.

Do not attempt to resolve it informally if the employee has made clear they want it dealt with formally. And avoid any conversation that could later be interpreted as pressure to drop the matter. Both of those mistakes are common, and both can be costly.

What a Formal Grievance Actually Means for You as an Employer

A grievance is a formal complaint raised by an employee about something at work. It might involve concerns about their working conditions, how they are being treated by a colleague or manager, a breakdown in a working relationship, pay, or alleged discrimination or bullying.

What matters here is not the dictionary definition. What matters is what it means for you. Once an employee signals they want to raise something formally, you are operating in a legally structured space. You are required to follow a proper process under the ACAS Code of Practice on Disciplinary and Grievance Procedures. That code is not legally binding in itself, but employment tribunals use it as a benchmark. Where an employer has unreasonably failed to follow it, tribunals can increase any compensation awarded by up to 25%.

That is a significant financial exposure on top of whatever the underlying claim might be worth. Getting the process right is not just good HR practice. It is a direct financial protection for your business.

The Formal Employee Grievance Procedure Step by Step

Here is how a sound grievance process works in practice.

Step 1: Receive the Written Grievance

Ask the employee to put their grievance in writing if they have not already done so. This does not need to be a formal letter. An email setting out what they are concerned about is sufficient. The key is that you have a clear record of what has been raised and when.

If you have a grievance policy in place, refer the employee to it so they understand what to expect. A well-written set of HR policies and procedures should set out your process clearly and give employees confidence that their concerns will be taken seriously.

Step 2: Investigate Before You Meet

Before you invite the employee to a grievance hearing, do some groundwork. Gather any relevant documents, messages, records, or notes. If the grievance involves another employee, you may need to speak to witnesses or review communications. Be thorough but fair, and keep everything you gather on file.

This stage is often rushed, and that is where things go wrong. A sloppy investigation leads to a poorly informed hearing, which leads to a decision that cannot stand up to scrutiny. Take the time to understand the full picture before you sit down with the employee.

Step 3: Invite the Employee to a Grievance Hearing

Send the employee a written invitation to a grievance hearing, giving them reasonable notice. ACAS does not prescribe a fixed minimum period, but the principle is that the employee should have a genuine opportunity to prepare their case. In practice, most HR advisors recommend at least 48 hours, and longer where the matter is complex or sensitive.

The invitation should confirm the date, time, and location of the meeting, who will be chairing it, and the employee's right to be accompanied. Under the Employment Relations Act 1999, every employee has the statutory right to be accompanied at a grievance hearing by a trade union representative or a work colleague.

Step 4: Hold the Grievance Hearing

The hearing is a chance for the employee to explain their grievance fully and for you to ask questions. Your role here is to listen and understand, not to defend yourself or challenge every point. Keep the meeting factual and structured.

Take notes throughout. If possible, have someone else in the room to take notes while you chair the meeting. This protects you later. Keep the tone calm and professional, even if the content is difficult or emotionally charged.

At the end of the hearing, explain that you will consider everything raised and respond in writing. Do not be pressured into making a decision on the spot.

Step 5: Make Your Decision and Communicate It in Writing

After the hearing, review your notes, revisit your investigation, and make a considered decision. Your written response should set out the outcome clearly, explain your reasoning, and confirm how the employee can appeal if they are unhappy with the result.

Do this promptly. Delays suggest disorganisation or indifference, and neither helps your position if the matter later escalates.

Step 6: Give the Right of Appeal

The right to appeal is not optional. It is a core requirement of the ACAS Code, and failing to offer it is one of the most common procedural errors employers make. The appeal should ideally be heard by someone who was not involved in the original hearing, which in a small business can be a challenge but is worth organising wherever possible.

If an appeal is lodged, follow the same principles: investigate, hold a hearing, take notes, and respond in writing.

Grievance Procedure Checklist for Employers

Use this checklist to make sure you have covered every stage correctly.

Why Documentation Is Your Most Powerful Protection

If a grievance ever escalates to an employment tribunal, the documentation you have gathered throughout the process will be central to your defence. Tribunals look closely at whether you followed a fair and consistent procedure, and written records are the evidence that demonstrates you did.

Keep copies of all written communications, your investigation notes, the hearing notes, your decision letter, and any appeal correspondence. Store them securely and ensure they are accessible if needed months or even years later.

It is also worth noting that if the same employee later brings a disciplinary matter, or if the grievance intersects with an ongoing disciplinary or performance management process, clear and consistent documentation will help you navigate both situations without the two becoming tangled. Grievances raised during disciplinary processes are common. Employers who handle them calmly and procedurally are in a significantly stronger position.

The Common Mistakes That Let Grievances Spiral

Most grievances that reach the tribunal do so because of avoidable mistakes earlier in the process. Here are the ones we see most often.

• Doing nothing and hoping it goes away. It does not.
• Trying to resolve a formal grievance informally without the employee's agreement
• Failing to offer the employee a right of appeal
• Not keeping written records of meetings, decisions, or the reasoning behind them
• Allowing the line manager named in the grievance to investigate or chair the hearing
• Reaching a conclusion before the hearing has actually taken place
• Treating employees differently when similar grievances arise
  
  

A robust employee handbook that sets out your grievance process clearly, combined with well-drafted employment contracts that reflect how your business actually operates, gives you the strongest possible foundation before a grievance ever arises.

When a Grievance Overlaps With Other Issues

Grievances rarely exist in isolation. An employee on long-term sick leave may raise a grievance about how their absence has been managed. A grievance about unfair treatment might surface during a redundancy or restructuring process. In these situations, it is important to keep the processes separate and manage each one on its own terms.

Mixing processes, or allowing one to contaminate the other, is a reliable source of procedural error. If you are not sure which process takes priority or how to run them concurrently, that is precisely when having professional HR support in your corner is worth far more than it costs.

You may also find our guidance on handling a phased return to work useful, as well as our piece on the right way to use without prejudice conversations, both of which cover situations where grievances can overlap with other sensitive employment matters.

Grievances Raised During Disciplinary Processes or Redundancy

It is not unusual for a grievance to be raised at a sensitive moment, such as during a disciplinary process or when restructuring is underway. When this happens, the instinct is sometimes to view the timing with suspicion. Resist that instinct.

Whatever the timing, you are legally required to deal with the grievance properly. Sidelining it, delaying it, or treating it as less important because of when it was raised are all approaches that can significantly weaken your position at tribunal. The most protective thing you can do is follow your process faithfully, document your reasoning at every stage, and treat the grievance entirely on its own merits.

If the grievance raises issues that are directly relevant to the disciplinary or redundancy process already under way, take advice before proceeding. The interaction between these processes is one of the more complex areas of employment law, and getting it wrong at this stage can be particularly costly.

Getting the Right Foundations in Place Before You Need Them

If handling a grievance feels complicated, that is because people matters genuinely are. The law provides a framework, but applying it fairly and consistently to the human realities of a small business takes experience and sound judgment.

The most effective thing you can do is get the foundations right before a grievance ever arises. That means having clear HR policies and procedures in place, a well-written employee handbook that your team has actually read, and employment contracts that reflect how your business actually operates.

When those foundations exist, a grievance is something you can handle calmly and confidently. Without them, you are navigating blind at the worst possible time.

Frequently Asked Questions

Can an employee raise a grievance anonymously?

An employee can raise a concern anonymously through informal channels, but a formal grievance process requires you to investigate the specific complaint and respond to the individual who raised it. If you receive an anonymous complaint, you can still investigate where possible, but you cannot run a full formal grievance procedure without knowing who has raised it and what they are alleging. Anonymous concerns are better handled through a whistleblowing policy if one is in place.

How long does a grievance procedure take?

There is no fixed legal timeframe, but the ACAS Code emphasises that grievances should be dealt with promptly. In practice, most straightforward grievances can be concluded within two to four weeks from the date the grievance is received. More complex cases, particularly where a thorough investigation is needed or multiple witnesses are involved, may take longer. What matters is that you keep the employee informed of progress and do not allow unnecessary delays to creep in.

What happens if the grievance is about the business owner directly?

This is one of the more challenging situations in a small business where there may not be a more senior manager to take over the process. Where the grievance is about you as the owner or director, you should consider whether you can appoint another appropriate person to hear and investigate the matter, such as a trusted senior colleague, a non-executive director, or an external HR professional. Investigating your own grievance is a significant procedural risk and can leave you very exposed if the matter reaches tribunal.

Dealing With a Grievance Right Now? We Can Help.

Whether you have a grievance on your desk today and need clear guidance on the right next steps, or you want to make sure your business has the right process and documentation in place before anything arises, this is exactly what we are here for.

Get in touch with the team, and we will talk you through your situation. Or if you would rather start with a conversation, book a free HR consultancy call, and we can assess exactly where your business stands and what needs to happen next.

The right support at the right moment makes the difference between a grievance that is resolved cleanly and one that spirals. Do not wait until you are already in deep water.