Can An Employer Refuse To Hear A Grievance In The UK?

Grievances happen in every workplace - even well-run teams. The question small business owners often ask is simple: do you have to hear every grievance, or can you refuse in some situations?

Short answer: you should almost always acknowledge and deal with grievances. UK employment law doesn’t force you to uphold every complaint, but it does expect you to follow a fair process in line with the Acas Code of Practice on Disciplinary and Grievance Procedures. Ignoring or refusing to hear a grievance without a solid reason can come back to bite you at an Employment Tribunal.

In this guide, we’ll unpack when you can refuse (or redirect) a grievance, how to handle tricky scenarios like anonymous complaints or repeat issues, and the steps to run a fair, low-risk process from the start.

What Counts As A Grievance Under UK Law?

A grievance is any concern, problem or complaint an employee raises about their work, working conditions, or relationships at work. It can be about pay, treatment by a manager, workload, health and safety, discrimination, or how a policy is applied.

Most businesses set out their process in a written policy. If you don’t have one yet, it’s worth adding a clear, accessible procedure to your Staff Handbook so employees know how to raise issues and who handles them. A well-drafted Staff Handbook helps you set expectations, timelines and stages (informal → formal → appeal) that align with the Acas Code.

Key principles to remember:

• Follow the Acas Code of Practice - it’s not law, but Tribunals can adjust awards by up to 25% for unreasonable failure to comply.
• Act promptly and fairly - unnecessary delays or bias can be deemed unreasonable.
• Allow a hearing and appeal - employees should have a chance to be heard and to challenge the outcome.
• Right to be accompanied - under the Employment Relations Act 1999, employees can be accompanied by a colleague or trade union representative at a formal grievance meeting.

If your policy is unclear or inconsistent with the Code, update it now - it’s much easier to follow a good process if it’s documented and understood from day one.

Can An Employer Refuse To Hear A Grievance?

Generally, you shouldn’t refuse to hear a grievance. However, there are narrow circumstances where it’s reasonable to refuse, pause, or redirect it. The test is reasonableness - would a fair employer, acting in line with the Acas Code, treat the complaint this way?

Reasonable Grounds To Refuse Or Redirect

• Not actually a grievance: If the issue is a pay query already being dealt with by payroll or a request under a different policy (for example, flexible working), you can direct the employee to the correct route. Make sure you still acknowledge the concern and signpost the right process.
• Vexatious or frivolous: If a complaint is clearly malicious, trivial, or repeats issues already fully investigated with no new evidence, you can refuse a fresh hearing. Document why you consider it repetitive or vexatious and confirm this in writing.
• Outside scope or timescale: Some policies set reasonable time limits. If a grievance is raised long after the event with no good reason, you can refuse, but consider the risk - issues linked to discrimination or whistleblowing can be sensitive and may merit investigation regardless of timing.
• Collective or third-party issues: If the complaint relates to matters outside your control (e.g. landlord decisions) or is a collective issue that should go through a separate consultation route, it’s fine to redirect to the appropriate process.

When You Should Not Refuse

• Discrimination, harassment, victimisation or health and safety: Equality Act 2010 and health and safety duties mean these should be taken seriously. Refusing to hear them can escalate risk quickly.
• Protected disclosures (whistleblowing): Public Interest Disclosure Act 1998 protects workers who raise qualifying disclosures. Treat these as whistleblowing and follow your separate procedure - but don’t ignore them.
• Constructive dismissal risk: If the employee is alleging a fundamental breach of contract (for example, unilateral pay cuts or intolerable treatment), refusing to hear the grievance can increase exposure to claims. It’s safer to investigate and respond.

In practice, most employers acknowledge the grievance, decide the appropriate route (grievance, whistleblowing, or another policy), and either proceed to an investigation or explain why the issue isn’t being taken forward - with reasons. Keeping written records is essential if the matter later reaches a Tribunal.

How To Handle Grievances Fairly (And Avoid Tribunal Risk)

Even if you think a grievance has no merit, a fair process protects your business. The Acas Code sets a sensible structure you can adapt to your size and resources.

1) Acknowledge Promptly And Clarify The Issues

Confirm receipt in writing, share your policy and ask for any supporting evidence. If the complaint is unclear or sprawling, ask the employee to set out the specific points they want you to consider. Clarity now saves time later.

2) Decide The Route: Grievance, Whistleblowing Or Other Policy

Apply the correct policy. If the issue is whistleblowing, follow your whistleblowing process. If it’s a performance dispute, you might need to run a grievance process alongside a capability process. Where cases overlap, you can pause one while you investigate the other - just explain why and keep the employee updated.

3) Appoint An Impartial Investigator

Choose someone who isn’t involved in the allegations. For small teams, an external investigator can be a smart move. Follow a proportionate process: gather documents, interview the complainant and relevant witnesses, and write a clear report with findings. If you need help structuring this, our guide to workplace investigations walks through a fair, step-by-step approach.

4) Hold A Formal Grievance Meeting

Invite the employee to a meeting with reasonable notice and confirm their right to be accompanied. Keep the meeting focused on the issues under review. Good preparation is key - see our tips on running grievance meetings without common pitfalls.

5) Issue A Reasoned Outcome And Offer An Appeal

Confirm the outcome in writing (upheld, partially upheld, or not upheld), set out your reasoning, and outline any actions you’ll take. Provide a timeframe and process for appeal heard by someone not previously involved.

6) Implement Outcomes And Monitor

If you’ve promised training, adjustments, or policy updates, act on them. Following through reduces repeat grievances and strengthens your position if the issue resurfaces.

Finally, keep your documentation tight - invite letters, notes, evidence logs and the final outcome. Accurate records are often the difference between winning and losing at Tribunal. If you want to pressure test your approach, this piece on why employers lose Employment Tribunals is a useful checklist.

Tricky Scenarios: Anonymous, Repeat, Or Ex-Employee Grievances

Some grievances don’t fit neatly into your policy. Here’s how to navigate them sensibly.

Anonymous Grievances

It’s harder to investigate without a named complainant, but don’t dismiss them out of hand - especially if the allegation is serious (discrimination, harassment, safeguarding, or health and safety). Assess credibility and look for corroborative evidence. If you can’t take it further, record why.

Repeat Or Overlapping Issues

If an employee re-raises an issue already investigated, ask for new evidence before opening a new case. Where a grievance overlaps with disciplinary or performance concerns, you can decide the order of processes. For instance, if the grievance alleges bias within a disciplinary case, you might pause the disciplinary process while you investigate the grievance, or fold the concerns into the disciplinary hearing itself - just make the rationale clear in writing.

During Performance Management Or PIPs

Employees often raise grievances after performance concerns are put on the table. Don’t assume it’s tactical - assess the content. You can proceed with performance management while handling the grievance, provided the process remains fair. If your procedures escalate to warnings, make sure your approach to a final written warning is defensible and consistent.

Ex-Employee Grievances

Ex-employees sometimes raise grievances post-exit, particularly before bringing claims. You can still respond using a proportionate approach. If litigation is likely, you may switch to a more formal complaints or legal response process. Either way, acknowledge, assess risk, and avoid silence. If the grievance relates to the termination itself, review whether your process aligned with fair dismissal principles - our checklist on ending an employment contract fairly is a good sense-check.

Legal Risks If You Refuse To Hear A Grievance

Refusing or mishandling a grievance isn’t just a process glitch - it can have legal consequences.

• Acas Code uplift: A Tribunal can increase compensation by up to 25% if you unreasonably fail to follow the Code.
• Constructive dismissal: If an employee resigns in response to a fundamental breach (e.g. ignoring serious complaints or allowing harassment to continue), they may claim constructive dismissal.
• Discrimination and victimisation: Mishandling complaints about protected characteristics can lead to unlimited compensation and reputational harm.
• Whistleblowing detriment: Workers are protected from detriment or dismissal for making protected disclosures.
• Data protection breaches: Grievance files contain personal data. Under UK GDPR and the Data Protection Act 2018, ensure secure handling, limited access and sensible retention. If grievances touch on confidentiality or data misuse, make sure your workplace confidentiality policies and privacy practices are up to scratch.

If your grievance highlights a possible breach of contract (for example, unilateral pay reductions or inconsistent benefits), sense-check your documents. Well-drafted terms reduce the risk of a breach of employment contract claim.

Set Yourself Up For Success: Policies, Contracts And Good Habits

Getting your legal foundations right makes it far easier to handle grievances calmly and consistently. Consider these practical building blocks:

Have The Right Contracts And Policies In Place

• Employment Contract: Set clear duties, reporting lines, and expectations around conduct and complaints. A robust Employment Contract makes managing performance and process simpler.
• Staff Handbook: Include your grievance, disciplinary and whistleblowing procedures, plus anti-harassment and equality policies. Your Staff Handbook should align with the Acas Code and be easy to follow for managers and staff.
• Confidentiality and Data Policies: Make sure managers know how to handle grievance data and keep investigations confidential. Review your confidentiality policies alongside privacy notices.

Train Your Managers

Many grievances escalate because a manager reacted defensively or informally promised a fix they couldn’t deliver. Short, practical training on early resolution, documentation and meeting skills prevents missteps. Give managers a simple playbook for invitations, note-taking, adjournments, and outcomes.

Use A Simple, Proportionate Investigation Framework

Not every grievance requires a months-long inquiry. For minor issues, a short fact-finding exercise may be enough; for severe allegations, step up to a formal process. If suspension is on the table in a related disciplinary process, make sure any decision follows fair principles - our guide to employee suspension sets out the risks and best practice.

Deal With Root Causes

If you’re getting repeat grievances about the same theme (e.g. workload or a supervisor’s style), treat the pattern as data. Sometimes the most risk-reducing move is a targeted change - training, resourcing, or a clearer policy. Where performance concerns are part of the picture, ensure your approach to Performance Improvement Plans is fair and consistent so employees feel heard rather than punished.

Document Everything, Sensibly

Keep a complete record: the grievance, your responses, evidence, meeting notes, outcome letters, and any appeal decision. Store it securely and only for as long as necessary. If you later need to explain why you refused a grievance (for example, as vexatious or out-of-scope), your paper trail should show that decision was reasoned and fair.

Key Takeaways

• In most cases, you should hear a grievance - refusing without a fair reason risks an Acas uplift, discrimination or constructive dismissal claims.
• It’s reasonable to refuse or redirect if the complaint is vexatious, a repeat with no new evidence, out-of-scope, or better handled under another policy - but explain your reasoning in writing.
• Follow a fair process: acknowledge quickly, pick the right route, investigate proportionately, hold a fair meeting, and issue a reasoned outcome with an appeal.
• Handle tricky scenarios with care: treat anonymous, overlapping, or ex-employee grievances proportionately, especially where equality, whistleblowing or health and safety are involved.
• Protect your business with the right documentation: use a clear Employment Contract, a Code-aligned Staff Handbook, and solid confidentiality and investigation practices.
• Good records and consistent decisions are your best defence at Tribunal - and they help resolve issues early and fairly.

If you’d like tailored help setting up grievance procedures, drafting letters or managing a tricky case, our team can help. Reach us on 08081347754 or team@sprintlaw.co.uk for a free, no-obligations chat.