Grievance Procedure

A documented, step-by-step process that employees follow to formally raise workplace complaints and that employers follow to investigate, respond, and resolve those complaints.

What Is a Grievance Procedure?

Key Takeaways

  • A grievance procedure is a formal, documented process that outlines how employees raise complaints and how the employer investigates and resolves them.
  • It typically includes stages for informal resolution, formal filing, investigation, a decision meeting, and an appeal.
  • In the UK, the ACAS Code of Practice sets minimum standards. Failing to follow it can increase tribunal compensation by up to 25%.
  • A good grievance procedure protects both parties: employees get a fair hearing, and employers get a documented process that stands up in court.
  • The procedure should be accessible, clearly written, and communicated to every employee during onboarding and in the employee handbook.

A grievance procedure is the rulebook for handling formal complaints. It tells employees how to raise a grievance, who to raise it with, and what happens next. It tells managers and HR how to investigate, how to make a decision, and how to handle an appeal. Without a procedure, grievances get handled inconsistently. One manager ignores the complaint. Another overreacts. A third passes it to HR without explanation. The result is confusion, unfairness, and legal exposure. A written procedure removes that randomness. Every complaint follows the same path, with the same standards of evidence, the same timelines, and the same rights for the employee. The procedure doesn't need to be long. The best grievance procedures fit on two or three pages. What matters is clarity: who does what, when, and what happens if the employee isn't satisfied with the outcome.

89%Of UK employers with 50+ employees have a formal written grievance procedure (CIPD, 2024)
25%Maximum increase in tribunal compensation if an employer fails to follow the ACAS Code of Practice (GOV.UK)
4-6 weeksAverage time from filing to resolution for a standard grievance procedure (SHRM, 2023)
58%Of employees say they don't know how to file a grievance at their organisation (WorkNest, 2024)

Stages of a Grievance Procedure

Most grievance procedures follow a five-stage structure. Each stage has a clear purpose and defined roles.

StageWhat HappensWho's InvolvedTypical Timeline
1. Informal ResolutionEmployee raises the issue with their line manager or HR informallyEmployee, line manager1-5 days
2. Formal FilingEmployee submits a written grievance if informal resolution failsEmployee, HR1-2 days to acknowledge
3. InvestigationHR or an appointed investigator gathers evidence, interviews witnessesInvestigator, witnesses, employee1-3 weeks
4. Grievance MeetingEmployee presents their case; the decision-maker asks questionsEmployee, decision-maker, companion1-2 hours
5. AppealEmployee requests a review by a senior manager not previously involvedEmployee, appeal manager1-2 weeks

Key Elements of an Effective Grievance Procedure

Not all grievance procedures are created equal. The difference between one that works and one that creates more problems comes down to specific design choices.

Clear scope and definitions

The procedure should define what counts as a grievance and what doesn't. Individual complaints about employment terms, working conditions, management behaviour, discrimination, and policy application are typically in scope. Collective disputes, performance management disagreements, and complaints about the outcome of a separate HR process (like a redundancy selection) may need different procedures. Being explicit prevents confusion at the point of filing.

Right to be accompanied

In the UK, employees have a statutory right to be accompanied at formal grievance meetings by a trade union representative or a work colleague. The Employment Relations Act 1999 establishes this right. In the US, non-union employees don't have this right unless the employer's policy grants it. Best practice is to allow accompaniment regardless of legal requirements. An employee who brings a companion feels less intimidated and is more likely to engage honestly in the process.

Confidentiality commitments

The procedure should state clearly how confidentiality will be maintained. Employees need to trust that raising a grievance won't be broadcast across the organisation. At the same time, the procedure must acknowledge that some information will need to be shared with the investigation team and decision-makers. Promise appropriate confidentiality, not absolute confidentiality. The latter is a promise you can't keep.

Timelines with accountability

Specify deadlines for each stage: acknowledgement within 3 working days, investigation completed within 2 weeks, grievance meeting within 5 working days of investigation completion, written outcome within 3 working days of the meeting, appeal heard within 2 weeks of the request. Include a clause allowing extensions with written notice and reasons. Vague timelines like "as soon as reasonably practicable" invite delays.

How to Write a Grievance Procedure

Writing a grievance procedure from scratch requires balancing legal compliance, practical usability, and organisational culture.

  • Start with the ACAS Code of Practice (or your country's equivalent) as the baseline. Don't write a procedure that falls below the statutory minimum.
  • Use plain language. If an employee needs a lawyer to understand the procedure, it's too complicated. Write it at an eighth-grade reading level.
  • Include worked examples showing what a grievance letter looks like, what the investigation process involves, and what a typical outcome letter contains.
  • Specify who the employee should contact if the grievance is about their line manager. This is a common gap: the procedure says "raise it with your manager," but the manager is the problem.
  • Address overlapping processes: what happens if a grievance is raised during a disciplinary process, during a redundancy consultation, or after the employee has resigned.
  • Build in a mediation step between the formal meeting and the appeal. Mediation resolves a significant percentage of grievances faster and with better outcomes for both parties.
  • Have the procedure reviewed by an employment lawyer before publishing. Legal nuances vary by jurisdiction and change over time.
  • Translate the procedure into any languages spoken by a significant portion of your workforce.

Common Grievance Procedure Mistakes

These mistakes show up repeatedly in employment tribunal cases and HR audits. Each one is avoidable.

Using the same person as investigator and decision-maker

The person who investigates the facts shouldn't be the same person who decides the outcome. Separation of roles ensures objectivity and strengthens the employer's position if the decision is challenged. In small organisations with limited staff, bring in an external HR consultant or use a manager from a different location.

Failing to keep records

Every step of the grievance process should be documented: the original complaint, investigation notes, witness statements, the decision meeting minutes, the outcome letter, and the appeal decision. If it isn't written down, it didn't happen. Tribunals and courts rely heavily on contemporaneous documentation.

Rushing to close the grievance

Speed matters, but thoroughness matters more. Conducting a superficial investigation to close the case quickly will backfire if the employee escalates to a tribunal. Take the time needed to gather evidence, interview all relevant witnesses, and consider the facts carefully. A thorough investigation that takes four weeks is better than a sloppy one that takes four days.

The Role of Mediation in Grievance Resolution

Mediation is an increasingly popular alternative to formal grievance hearings, especially for interpersonal disputes.

When mediation works

Mediation works best for relationship-based grievances: personality clashes, communication breakdowns, management style complaints, and team conflicts. Both parties must be willing to participate. Mediation isn't appropriate for serious misconduct, discrimination, or harassment cases where a formal investigation and outcome are needed.

How mediation fits into the procedure

Some organisations offer mediation as a step between informal resolution and formal filing. Others offer it after the formal investigation if both parties agree. Either approach works. The mediator should be trained, neutral, and not involved in any supervisory relationship with either party. External mediators are preferred for sensitive cases. ACAS offers a free mediation service for UK employers.

Frequently Asked Questions

Can an employer refuse to accept a grievance?

Generally, no. If an employee submits a written complaint that meets the definition of a grievance under the company's procedure, the employer must process it. Refusing to accept a valid grievance is a breach of the ACAS Code in the UK and could constitute evidence of bad faith in US litigation. The employer can direct the employee to the correct procedure if the complaint falls outside the grievance scope (for example, a performance management issue).

What if the grievance is about a senior leader or the CEO?

The procedure should include a provision for this scenario. Typically, grievances about senior leaders are handled by a board member, an external HR consultant, or the company's legal counsel. The key is that the investigation must be genuinely independent. Having the CEO's direct report investigate a grievance about the CEO doesn't meet anyone's definition of impartiality.

Can a grievance be raised anonymously?

Some organisations accept anonymous grievances, but they're difficult to investigate properly. The employer can't interview the complainant, clarify details, or provide a formal outcome. Best practice is to accept anonymous reports as intelligence that may prompt a broader investigation, but to encourage named grievances for full procedural handling. Whistleblowing procedures, which have stronger legal protections, are a better channel for anonymous reports about serious misconduct.

Does raising a grievance protect an employee from redundancy?

No. Raising a grievance doesn't create immunity from redundancy or any other legitimate management action. However, if an employer makes someone redundant shortly after they filed a grievance, the employee may claim the redundancy was retaliatory rather than genuine. Employers should ensure the redundancy process is well-documented, follows objective selection criteria, and can be shown to be unrelated to the grievance.

How often should a grievance procedure be reviewed?

At least annually, or whenever employment law changes. Review the procedure against current ACAS guidance (or your country's equivalent), recent tribunal decisions, and lessons learned from grievances handled during the year. Ask employees and managers whether the procedure is clear and accessible. A procedure that sits in a drawer for five years without review is almost certainly out of date.
Adithyan RKWritten by Adithyan RK
Surya N
Fact-checked by Surya N
Published on: 25 Mar 2026Last updated:
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