You raised a formal grievance, but the outcome wasn't what you expected. Now you have the right to appeal.
An appeal letter isn't a second complaint. It's a document that makes a specific case: here is why the original decision was wrong, and here is what I want instead. Appeals that read like venting rarely go anywhere. The goal is to give a reviewer a clear, factual argument they can act on.
What is a grievance appeal letter?
A formal written request to have a grievance outcome reviewed. You'd write one when the original decision was incorrect, the investigation missed something important, or the process wasn't followed correctly.
Most employment policies give employees the right to appeal. In the US, the process is usually set out in your company's grievance procedure. In the UK, the ACAS Code of Practice sets the standard. Either way, the letter is your first formal step.
An appeal isn't a chance to rehash the original complaint. It needs a targeted argument about why the outcome was wrong. That focus is what gives it weight.
When to write a grievance letter
The most common grounds are: the investigation wasn't thorough enough; key evidence or witnesses weren't considered; the decision contradicted company policy or employment law; or the outcome was disproportionate to the facts.
You'll need to be specific. 'The outcome was unfair' isn't a ground for appeal. 'The investigator didn't speak to the two witnesses I named in my original submission' is.
What to include in your grievance letter
At minimum: your name and role, the date of the original grievance, the date of the outcome, your grounds for appeal, any evidence you're relying on, and what you're asking for.
Keep the tone factual. Whoever reviews the appeal needs to see clearly where the original process fell short. Don't make them work for it.
Grievance appeal letter template
A grievance appeal letter is your opportunity to make a focused, factual case for why the original outcome was wrong. Unlike your initial complaint, which laid out what happened, this letter needs to do something more specific: identify exactly where the investigation or decision fell short, and state clearly what you want instead. Keep it tight. A well-structured appeal gives the reviewer something concrete to act on.
Subject line: Re: Appeal against grievance outcome — [your name], [date of original outcome]
[Your full name]
[Your job title and department]
[Date]
[Name of HR Manager or appeal officer]
[Company name and address]
Dear [Name],
I am writing to formally appeal the outcome of my grievance, communicated to me on [date]. My original grievance was submitted on [date] and concerned [brief description of the issue].
I do not believe the decision reached was correct. My reasons are as follows:
1. [First ground — e.g., key witness statements were not obtained or considered]
2. [Second ground — e.g., the outcome conflicts with the company's policy on X, section Y]
3. [Third ground, if applicable]
In support of this appeal, I would draw attention to the following:
[Describe the specific evidence, documents, or information you believe was missed or not properly considered. Be factual and concise.]
I am asking that [state clearly what you want — e.g., the decision be reconsidered / a fresh investigation be conducted / a formal apology be issued].
I am available for an appeal hearing on [dates] and can be reached at [phone/email].
Yours sincerely,
[Signature]
[Printed name]
Making a grievance appeal letter work for your situation
The grounds section is where most appeal letters succeed or fail. Each ground needs to be concrete. If the investigation was inadequate, say exactly what was missed and why it mattered. If the decision contradicts policy, cite the relevant clause.
Keep it to one page if you can. This isn't the place to document everything. It's the place to make the clearest possible case. If you have supporting documents, attach them and reference them in the letter rather than quoting them in full.
Avoid criticizing the individual who handled the original decision. Stay focused on what the process got wrong. An appeal panel finds that easier to act on, and it's harder to dismiss. The most effective appeal letters read as reasonable and controlled, even when the situation behind them is anything but.
What happens after you submit your grievance appeal letter
Your employer should acknowledge receipt promptly. Sending a brief confirmation request by email is reasonable if you haven't heard back within a day or two. Having a written record that your appeal was received is worth more than it seems if things escalate.
Your employer should then arrange an appeal hearing without unreasonable delay. In the UK, ACAS guidance sets this expectation explicitly. In the US, timelines depend on your employer's procedure.
The hearing should be conducted by someone who wasn't involved in the original investigation. You'll have the opportunity to present your case and respond to questions.
A written outcome follows the hearing. If it still doesn't resolve things, further routes include an employment tribunal (UK) or a relevant state or federal agency (US). In the UK, you generally need to have exhausted your employer's internal process before a tribunal will hear your case. In the US, depending on the nature of the grievance, the US Equal Employment Opportunity Commission (EEOC) or a state labor board may be the relevant body. At that point, legal advice is worth getting if you haven't already.
Getting the tone right
Most people navigating a formal grievance are already under real pressure. ACAS research published in 2025 found that stress, anxiety, or depression was the most commonly reported impact of workplace conflict, cited by 57% of those experiencing it. Letters drafted in that state tend to show it: sentences run long, frustration creeps in, and the argument gets buried under repetition.
A 2024 study in Frontiers in Public Health found that how conflict is handled affects wellbeing outcomes independently of whether it's resolved, with emotional exhaustion as a key driver. Approaching the appeal in a way that's controlled and purposeful isn't just better for your case. It's better for you.
Read it back before sending. If any sentence is there to vent rather than argue, cut it. The strongest appeal letters make a reader think 'this is a reasonable case,' not 'this person is upset.'
When to get outside help for grievance appeals
If the grievance involves discrimination, harassment, or anything with potential legal implications, get advice before you submit. A union representative, employment lawyer, or Citizens Advice (UK) can tell you whether your grounds are strong and flag anything that could work against you.
For more complex cases, having someone else read it before you send is worth the time. A fresh set of eyes often catches something that felt obvious to you but reads as ambiguous to someone who wasn't there.
Written communication during a grievance process
A grievance appeal letter sits at one end of the spectrum of professional written communication, but it isn't the only thing you'll write during a grievance process. There are emails to HR arranging meetings, written records of conversations you want to document, requests for information, and follow-ups when things go quiet.
The same principles apply to all of them: be clear about what you're asking, keep the tone factual, and get to the point without burying it in context. Our guide to writing professional emails covers the habits that make written communication land well across a range of professional situations.
One practical note on that period: keep a record of every relevant email you send and receive. Save copies somewhere outside your work account if the grievance involves your employment relationship directly. The email trail often matters more than people expect when things escalate, and it's much harder to reconstruct after the fact.
If the volume of correspondence during this process is adding to the pressure, Fyxer organizes your inbox and drafts replies in your tone, which means the messages that need real care get it rather than competing with everything else. For broader guidance on keeping professional email communication manageable day to day, that article covers the habits worth building.
If you're working across multiple accounts or platforms, managing multiple email accounts effectively is worth reading alongside this. The principles are the same but the execution gets more complicated when your communication is spread across different inboxes.
Grievance appeal letter FAQs
What’s the difference between a grievance and a grievance appeal?
A grievance is the initial formal complaint you raise with your employer about a workplace issue. A grievance appeal comes after, when you've received the outcome of that complaint and believe the decision was wrong, the investigation was inadequate, or the process wasn't followed correctly. The appeal isn't a chance to restate your original complaint. It's a targeted argument about why the outcome should be reconsidered.
How long do I have to appeal a grievance decision?
Most employers set a deadline for appeals in their grievance procedure, typically between 5 and 10 working days from the date you receive the written outcome. Check your employee handbook or HR policy for the specific timeframe that applies to you. If you're unsure, ask HR in writing as soon as possible so there's a record of your inquiry.
What are valid grounds for a grievance appeal?
The most common grounds include: the investigation wasn't thorough enough; key witnesses or evidence weren't considered; the outcome contradicts company policy or employment law; or the decision was disproportionate given the facts. Vague dissatisfaction with the outcome isn't sufficient on its own. Your appeal needs to identify something specific that went wrong with the process or the decision.
What happens if my grievance appeal is unsuccessful?
If the appeal doesn't resolve the issue, your next options depend on the nature of the grievance. In the UK, you may be able to bring a claim to an employment tribunal, though you'll generally need to have exhausted your employer's internal process first. In the US, depending on what the grievance involves, you may be able to file a complaint with the EEOC or a relevant state labor agency. At this stage, getting advice from an employment lawyer or, in the UK, Citizens Advice or a union representative, is worth the time.
