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.
Key Takeaways
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.
Most grievance procedures follow a five-stage structure. Each stage has a clear purpose and defined roles.
| Stage | What Happens | Who's Involved | Typical Timeline |
|---|---|---|---|
| 1. Informal Resolution | Employee raises the issue with their line manager or HR informally | Employee, line manager | 1-5 days |
| 2. Formal Filing | Employee submits a written grievance if informal resolution fails | Employee, HR | 1-2 days to acknowledge |
| 3. Investigation | HR or an appointed investigator gathers evidence, interviews witnesses | Investigator, witnesses, employee | 1-3 weeks |
| 4. Grievance Meeting | Employee presents their case; the decision-maker asks questions | Employee, decision-maker, companion | 1-2 hours |
| 5. Appeal | Employee requests a review by a senior manager not previously involved | Employee, appeal manager | 1-2 weeks |
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.
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.
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.
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.
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.
Different countries impose different obligations on employers when it comes to grievance procedures.
The ACAS Code of Practice on Disciplinary and Grievance Procedures applies to all employers. While not legally binding in itself, tribunals must consider whether the employer followed the Code. Failure to do so can result in a 25% uplift in compensation. The Code requires employers to let the employee explain their case, investigate properly, allow the right to be accompanied, provide a written outcome, and offer a right of appeal. The Employment Act 2008 abolished the mandatory three-step statutory procedure but strengthened the role of the ACAS Code.
Federal law doesn't mandate a specific grievance procedure for private non-union employers. However, Title VII, the ADA, and other anti-discrimination laws effectively require employers to have a mechanism for employees to report discrimination and harassment. The Supreme Court's Faragher-Ellerth defence in harassment cases requires employers to prove they had a reasonable anti-harassment policy and complaint procedure. Without one, employers lose a key legal defence.
The Industrial Relations Code 2020 (consolidating the Industrial Disputes Act 1947) requires establishments with 20 or more workers to constitute a Grievance Redressal Committee. The committee must have equal representation from employer and workers. Grievances must be addressed within 30 days of receipt. For IT and service sector companies, the Shops and Establishments Acts in various states impose additional requirements depending on employee count and location.
Writing a grievance procedure from scratch requires balancing legal compliance, practical usability, and organisational culture.
These mistakes show up repeatedly in employment tribunal cases and HR audits. Each one is avoidable.
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.
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.
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.
Mediation is an increasingly popular alternative to formal grievance hearings, especially for interpersonal disputes.
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.
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.