Grievance Procedure in the UK: Handling Formal Employee Grievances

Even in a well-run small business, workplace issues can crop up. An employee might feel they’ve been treated unfairly, they may raise concerns about bullying or harassment, or there could be a dispute about pay, hours, or working conditions.

When those concerns turn into a formal grievance, it’s important you don’t try to “manage it quietly” or hope it blows over. A clear, fair grievance procedure is one of the most practical ways to protect your business, keep your team functioning, and reduce the risk of escalation into a claim.

This guide explains what a grievance procedure is, when a grievance becomes formal, and how you (as an employer) can handle a grievance at work step-by-step in a way that’s legally compliant and commercially sensible.

What Is A Grievance Procedure (And Why Does It Matter For Small Businesses)?

A grievance procedure is the process you follow when an employee raises a complaint or concern about their employment. It’s essentially your internal “roadmap” for dealing with workplace complaints fairly and consistently.

From a small business perspective, the biggest benefit is simple: it keeps you out of reactive mode. If you have a process and follow it consistently, you’re less likely to:

• miss key facts (or only hear one side of the story)
• say or do something that unintentionally escalates the issue
• treat employees inconsistently (which can look unfair or discriminatory)
• end up defending a tribunal claim without proper paperwork

The Legal Framework You Should Have In Mind

In the UK, there isn’t one single “Grievance Act” that tells employers exactly what to do. But there are rules and standards you should be aware of, including:

• ACAS Code of Practice on Disciplinary and Grievance Procedures (the benchmark for fairness in most workplaces)
• Employment Rights Act 1996 (relevant to dismissal and detriment risks if a grievance is mishandled)
• Equality Act 2010 (relevant where grievances involve discrimination, harassment, victimisation, or reasonable adjustments)
• UK GDPR and the Data Protection Act 2018 (relevant because grievances usually involve personal data and often sensitive information)

The ACAS Code isn’t legislation, but tribunals take it seriously. If an employee brings a claim and you’ve unreasonably failed to follow the Code, compensation can potentially be adjusted.

So the aim isn’t to be “perfect”. It’s to show you were reasonable, consistent, and fair.

When Does A Complaint Become A Formal Grievance?

In real life, most issues start informally: a quick chat, a manager being told “I’m not happy about X”, or an email that looks like feedback but is really a complaint.

A complaint generally becomes a formal grievance when:

• the employee sets out the complaint in writing (often emailing HR/management), and/or
• they clearly ask you to treat it as a formal complaint, and/or
• the issue is serious enough that it should be handled formally (for example allegations of bullying, harassment, discrimination, or a significant health and safety concern)

Do You Have To Run A Full Formal Process Every Time?

Not necessarily. Many grievances can (and should) be resolved informally where appropriate. Informal resolution is often faster, less stressful, and better for team culture.

But if an employee wants the issue handled formally, or if the allegations are serious, you should treat it as a formal grievance and follow your grievance procedure.

Timing Matters More Than You Think

One common employer mistake is waiting too long to respond, especially if you’re busy or you’re not sure what the employee wants.

Even if you need a little time to work out next steps, it’s usually best to acknowledge the grievance quickly and set expectations about process and timeframe. If you’re unsure what’s “reasonable” in your situation, having internal guidance around time limits can help you stay consistent.

Step-By-Step: A Practical Grievance Procedure Employers Can Follow

Every business is different, but most fair grievance procedures follow the same core stages. Below is a practical framework that maps closely to what ACAS expects and what employers typically need in order to make a sound decision.

Step 1: Acknowledge The Grievance (And Clarify The Issues)

Once you receive the grievance, acknowledge it in writing. Keep it calm and neutral.

At this stage, you want to clarify:

• what the complaint is (in the employee’s own words)
• who is involved
• what outcome the employee is seeking (apology, change of reporting line, policy change, training, etc.)
• whether the grievance overlaps with another process (performance management, disciplinaries, sickness absence, redundancy)

If the grievance is vague, it’s okay to ask for more detail. A grievance procedure works best when everyone is clear on the scope from the start.

Step 2: Appoint The Right Person To Handle It

Ideally, the grievance should be handled by a manager who is:

• senior enough to take it seriously and make decisions
• not personally involved in the allegations
• able to remain impartial

In a small business, that can be tricky (especially if the grievance is about the founder or the only manager on site). If you can’t keep it fully independent, aim to keep it as fair as possible and document why you’ve chosen the decision-maker you have.

Step 3: Decide Whether You Need Interim Measures

Some situations require temporary changes while you investigate, for example:

• separating employees on different shifts
• adjusting reporting lines
• temporary remote work arrangements

In more serious cases, you might consider suspension (for example where there’s a risk to staff, customers, evidence, or the business). But suspension should not be a knee-jerk reaction and should be reviewed regularly. If you’re considering it, it’s worth understanding the risks and best practice around suspension pending investigation.

Step 4: Investigate Properly (Before You Decide Anything)

A fair grievance procedure usually requires a reasonable investigation. What’s “reasonable” depends on the seriousness of the allegations and the evidence available.

As a starting point, your investigation may involve:

• interviewing the employee raising the grievance
• interviewing relevant witnesses
• reviewing documents (emails, Slack/Teams messages, rotas, timesheets, CCTV where appropriate)
• reviewing your internal policies (anti-bullying, equal opportunities, disciplinary, data protection, etc.)

Try to keep an open mind and avoid making early conclusions. You’re gathering facts, not building a case for one “side”.

If you want a deeper view of how this fits into a compliant HR approach, having a structured process for workplace investigations is often a good foundation.

Step 5: Hold A Grievance Meeting

Once you’ve gathered enough information to understand the issue, you’ll usually hold a formal grievance meeting with the employee.

The meeting is your opportunity to:

• let the employee explain their complaint in full
• ask clarifying questions
• test any key factual disputes (politely and fairly)
• discuss potential resolutions

Make sure you take notes and keep the tone professional. It’s not a debate to “win”. It’s part of reaching a fair outcome.

Employees have a statutory right to be accompanied at formal grievance meetings by a trade union representative or a workplace colleague. Even where the strict legal right may not apply (for example, if you’re dealing with something outside a formal grievance meeting), offering accompaniment can still be a sensible way to keep the process fair and calm.

If you’re worried about getting the meeting format wrong, it’s worth being aware of common grievance meeting pitfalls (like turning the meeting into an interrogation, failing to share relevant information, or not giving the employee a genuine chance to be heard).

Step 6: Make A Decision And Put The Outcome In Writing

After the meeting (and any further investigation needed), you’ll need to decide the outcome.

Outcomes vary depending on the situation, but often include:

• upholding the grievance (fully or partially)
• not upholding the grievance
• agreeing steps to resolve the issue (training, mediation, policy updates, management changes, workload adjustments)
• referring matters into a disciplinary process (if misconduct is identified)
• referring matters into a performance or capability process (where relevant)

Communicate the outcome in writing and include:

• a summary of the grievance
• what you investigated
• the key findings (in plain English)
• the decision and reasons
• any actions you’ll take and the timeframe
• the employee’s right to appeal and how to do it

Be careful with wording. You want to be transparent, but you also don’t want to include unnecessary personal data about other employees.

Step 7: Offer An Appeal

A grievance procedure should include an appeal stage. This matters because:

• it’s part of procedural fairness (especially under the ACAS Code)
• it gives you a chance to fix mistakes before they escalate
• it can be a genuine final attempt to preserve the working relationship

If possible, have the appeal heard by someone who was not involved in the original decision.

Tricky Situations: How To Handle Common Grievance Scenarios As An Employer

Formal grievances rarely arrive in a neat “standalone” package. They often overlap with other workplace issues you’re already managing.

Here are some common scenarios where small businesses can get caught out.

1. The Grievance Is Raised During Performance Management

This is very common: you put an employee on a performance plan, and they respond by raising a grievance (for example, “my manager is bullying me” or “I’m being singled out”).

Don’t automatically assume it’s tactical. Sometimes there’s a genuine problem with how performance is being managed, even if performance concerns are valid.

As a practical approach:

• consider whether the grievance needs to be handled first (for example, allegations of discrimination or harassment)
• or whether both processes can run in parallel with clear boundaries

If your situation involves structured performance management, having a compliant process for performance improvement plans can reduce the risk that a performance process is later criticised as unfair.

2. The Grievance Includes Allegations Of Bullying, Harassment, Or Discrimination

Where a grievance includes potential Equality Act issues (like sex, race, disability, religion or belief, age, sexual orientation), treat it with extra care.

Key practical points:

• act promptly (delays can worsen risk and workplace harm)
• consider whether any reasonable adjustments are needed during the process (for example, extra time, different meeting format)
• keep the investigation focused on facts and evidence, not assumptions
• avoid retaliatory behaviour (even subtle “cold shoulder” treatment can be risky)

3. The Grievance Involves Confidential Information

Many grievances involve sensitive allegations and personal data about multiple people. That creates two overlapping responsibilities:

• you must investigate fairly, and
• you must handle information lawfully and carefully.

Think about who needs to know, what needs to be shared, and how you’ll store records. Having clear confidentiality policies (and following them) can help avoid secondary disputes about privacy and trust.

4. The Grievance Raises Misconduct Issues

Sometimes, while investigating a grievance, you uncover evidence of misconduct by either the subject of the grievance or the employee raising it (for example, abusive messages, threats, or serious policy breaches).

If misconduct is involved, you may need to move parts of the situation into a disciplinary process. Where the alleged behaviour could be serious, it’s worth pressure-testing your steps against a gross misconduct checklist to avoid skipping key fairness steps.

How To Protect Your Business During A Formal Grievance (Without Making Things Worse)

A grievance procedure isn’t just about ticking boxes. The way you handle the process can either rebuild trust or blow up your working relationship.

Here are practical ways to protect your business while keeping things professional.

Keep Communication Calm, Neutral, And In Writing Where Possible

When a grievance at work is live, emotions can run high. Try to keep communications:

• fact-based (avoid opinions or assumptions)
• respectful (even if the allegations feel unfair)
• documented (so there’s a clear record of what was said and done)

Follow Your Policies (And Update Them If They’re Out Of Date)

If your workplace policies are vague or outdated, grievances become harder to manage consistently. Most small businesses benefit from having a clear set of workplace policies that cover:

• grievance and disciplinary procedures
• anti-bullying and harassment
• equal opportunities
• data protection and confidentiality
• social media / communications standards

If you’re scaling up and hiring more staff, this is one of those “do it now, thank yourself later” legal foundations.

Don’t Treat The Grievance As A Loyalty Test

It’s tempting to feel offended when an employee raises a formal grievance-especially in a small team where you’ve worked closely together.

But legally and practically, you’re better off treating it as a process issue, not a personal attack. When employees feel safe raising concerns, you’re more likely to fix problems early (before they become resignations, reputational damage, or legal disputes).

Be Consistent Across Your Team

Inconsistency is one of the easiest ways to create legal risk. If two employees raise similar complaints and you respond very differently, it can look unfair-particularly if protected characteristics are involved.

A consistent grievance procedure gives you a defensible structure and makes management decisions easier to justify.

Key Takeaways

• A clear and fair grievance procedure helps you resolve workplace issues early, protect your business, and reduce legal risk.
• A complaint becomes a formal grievance when it’s raised in writing (or clearly requested as formal), or when the allegations are serious enough to require a formal process.
• A strong process usually includes: acknowledging the grievance, appointing an impartial decision-maker, investigating, holding a grievance meeting, issuing a written outcome, and offering an appeal.
• Be especially careful where the grievance at work involves discrimination, harassment, protected disclosures (whistleblowing), or confidential information-these can carry higher legal and reputational risk.
• Document your steps and keep communications calm and factual; tribunals and advisers will often judge fairness by your records as much as your intentions.
• If the grievance overlaps with performance, misconduct, or suspension decisions, get advice early so the processes don’t undermine each other.

If you’d like help reviewing your grievance procedure, updating workplace policies, or managing a formal grievance at work in a way that protects your business, you can reach us at 08081347754 or team@sprintlaw.co.uk for a free, no-obligations chat.