Handling a grievance: the employer's guide

Most grievances are lost on process, not on the facts. The procedure is short - complaint, meeting, outcome, appeal - and a tribunal can add 25% to an award where an employer unreasonably skipped part of it.

By · Guide · Managing people · Checked 15 August 2026 · 8 min read

In short

Deal with it promptly, in a meeting the employee can bring a companion to, and give the outcome and a right of appeal in writing. Failing to follow the Acas Code on discipline and grievance without good reason lets a tribunal increase an award by up to 25% (s.207A TULRCA 1992) - and the same section cuts an award by up to 25% where the employee was the one who unreasonably failed to follow it.

The shape of a fair procedure

  1. The complaint. Ideally in writing, setting out what happened and what the employee wants done. If it arrives verbally, write down what you were told and confirm it back - do not wait for a form.
  2. A meeting, without unreasonable delay. Give enough notice for the employee to prepare and to arrange a companion.
  3. Investigation. Sometimes before the meeting, sometimes after it, depending on what the complaint is. Serious allegations should be investigated by someone not involved in them.
  4. The outcome, in writing. What you found, what you decided, what happens next, and how to appeal.
  5. An appeal, heard by someone who was not part of the original decision wherever your size allows it.

That is the whole procedure. Nearly every grievance that becomes a tribunal problem failed at step 2, step 4 or step 5 - a meeting that never happened, an outcome given verbally and never confirmed, or no appeal offered at all.

The right to be accompanied is statutory

Who, and what they may do

Under s.10 Employment Relations Act 1999, a worker who makes a reasonable request may be accompanied by one companion: an employed trade union official, a union official certified as trained or experienced in accompanying, or another of your own workers. That last category is the one small employers forget - a colleague is a perfectly valid companion, and there is no requirement for a union to be involved at all.

The companion may address the hearing to put the worker's case, sum it up, and respond on the worker's behalf to views expressed, and may confer with the worker during the hearing. They cannot answer questions on the worker's behalf, and cannot stop you putting your case.

The five-working-day postponement

If the chosen companion cannot make the time you proposed, the worker can propose an alternative - and provided it is reasonable and falls within five working days beginning with the first working day after the day you proposed, you must postpone to it. This is a right, not a courtesy. Refusing a properly made request is a straightforward breach, and an avoidable one.

Where employers actually go wrong

Treating the informal chat as the process

Resolving something informally is genuinely better for everyone when it works. The problem is when the informal conversation is the whole response to a formal complaint - no meeting, no findings, no written outcome, nothing to appeal. If the employee has raised a grievance, the process runs even if you also try to fix it quietly.

The manager who is the subject of the grievance hears it

Obvious when stated, common in practice - because the procedure says "raise it with your line manager" and nobody wrote down what happens when the line manager is the problem. Name an alternative route in the policy before you need it.

No written outcome

A decision delivered in a corridor is unevidenced and unappealable. Write it down: what was complained about, what you found, what you decided, what you are doing, and how to appeal, with a deadline.

Losing the thread on delay

"Without unreasonable delay" is judged against what was reasonable in your circumstances, not against a fixed clock - but a grievance that goes quiet for weeks with no explanation is hard to defend. If something legitimately takes time, say so in writing and give a new date.

What if the grievance is against a colleague?

A grievance about another employee - bullying, harassment, unfair treatment - follows the same fair procedure, with three extra disciplines. First, separation of roles: the person investigating the grievance must not also be handling any disciplinary that comes out of it against the colleague. Second, parallel duties: the accused colleague is owed a fair process too, so tell them what they need to answer, not everything the complainant said. Third, confidentiality with limits - promise discretion, never absolute secrecy, because if the account discloses harassment you may be under a duty to act on it whether or not the complainant wants to proceed. If the complaint is against the person's own line manager, route it past them - a procedure that dead-ends at the subject of the complaint is no procedure at all.

Overlaps worth planning for

  • Grievance raised during a disciplinary. Consider whether to pause the disciplinary while the grievance is dealt with, or run them together where they are closely related. Either can be reasonable; failing to consider it is not.
  • Grievance that is really a harassment complaint. Route it through the anti-harassment policy, which carries its own preventative duty and record-keeping - see the duty to prevent sexual harassment.
  • Grievance from someone who has already left. There is no obligation to run a full procedure after employment ends, but a proportionate written response is usually a better outcome than silence.
  • Anonymous concerns. They cannot go through a normal grievance process, because there is nobody to meet - but they still tell you something, and ignoring a pattern of them is its own risk.

Keep the record

Keep the complaint, the invitation letters, notes of the meetings, the investigation material, the outcome and the appeal. These are personal data - often about more than one person - so they need a retention period and access limited to those who need it, in line with your record-keeping obligations generally. What you should not do is keep them informally in a manager's inbox, which is where most of them are.

Our grievance procedure template puts all of this into a policy you can issue.

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A case file, not a manager's inbox

CoDash keeps grievance and dignity-at-work cases as structured records - who raised what, the meetings, the outcome, the appeal - with access limited to the people handling it and anonymised statistics for everyone else.