This page references a March 2026 amendment to EAT procedure and a further set of reforms still under consultation — the appeals process is genuinely in flux at the moment, so always check the EAT’s current practice direction before relying on a specific step.
Introduction
Yes, you can appeal an Employment Tribunal decision — but the process works quite differently from what people generally expect, and getting the first step wrong can cost you the right to challenge the decision at all. This guide walks through the actual mechanics: the choice between reconsideration and a full appeal, what counts as a valid ground, and how the process itself unfolds once you’ve started it — worth reading alongside what actually happens if your case doesn’t succeed in the first place, particularly around the costs risk many people worry about unnecessarily.
Table of Contents
- Appeal or Reconsideration? The Critical First Choice
- What Actually Counts as a Valid Ground of Appeal
- Who Can Appeal — It’s Not Just the Losing Side
- The Appeal Process: From Notice of Appeal to the Sift
- The 42-Day Deadline
- What Happens If Your Appeal Succeeds?
- Contact Us for Employment Tribunal Support
- Final Thoughts
- Frequently Asked Questions
Appeal or Reconsideration? The Critical First Choice
Before appealing, it’s worth knowing that a completely separate route exists: asking the same Employment Tribunal to reconsider its own judgment, under Rule 70 of the Employment Tribunal Rules of Procedure. Choosing the wrong one of these two routes — or using reconsideration when what you actually needed was an appeal — can genuinely cost you time you don’t have, given how strict the appeal deadline is.
Reconsideration exists to correct genuine administrative errors or oversights in a judgment — for example, where the tribunal made a clear factual or clerical mistake, reached a decision without a party present through no fault of their own, or where new evidence has emerged that couldn’t reasonably have been produced at the time. It is not designed to correct errors of law, and it’s not a second attempt to argue points the tribunal has already properly considered and rejected. In most cases, if you believe the tribunal got the law wrong rather than made a factual oversight, reconsideration isn’t the right tool — an appeal is.
What Actually Counts as a Valid Ground of Appeal
An appeal goes to the Employment Appeal Tribunal, and its jurisdiction is limited specifically to correcting errors of law — it doesn’t rehear your case or reconsider the evidence itself. This is worth being genuinely clear-eyed about: disagreeing with the tribunal’s factual findings, or feeling the outcome was simply wrong, isn’t a valid ground on its own, however strongly you feel it.
Valid grounds generally include a misapplication or misunderstanding of the relevant legal test, procedural unfairness during the hearing, a decision that was genuinely perverse given the evidence — meaning no reasonable tribunal could have reached it — a failure to give adequate reasons for the decision, or bias, including apparent bias. Grounds of appeal need to identify the specific error of law clearly and precisely; EAT judges have consistently noted that focused, well-defined grounds tend to be far more persuasive than a long list of loosely argued points, and raising too many grounds can actually suggest that none of them is particularly strong.
Who Can Appeal — It’s Not Just the Losing Side
Either party to a tribunal claim can appeal, not just the side that lost. A claimant who lost can appeal on the usual basis that the tribunal made an error of law. Less obviously, a respondent who actually won at tribunal can sometimes still have grounds to appeal, if the tribunal’s reasoning or specific findings could have consequences for other proceedings, or carry reputational implications the respondent wants formally challenged, even where the ultimate outcome favoured them.
The Appeal Process: From Notice of Appeal to the Sift
Once you’ve decided an appeal is genuinely the right route, the process itself follows a fairly structured path. You start by completing a Notice of Appeal and drafting Grounds of Appeal, setting out precisely which error of law you say the tribunal made—this document matters considerably, since it defines the entire scope of what the EAT will consider.
From there, your appeal goes through what’s known as the sift: an EAT judge reviews your Notice of Appeal and the tribunal’s judgment on the papers alone, without a hearing, to decide whether any of your grounds are reasonably arguable. If the judge considers a ground has no reasonable prospect, that ground won’t proceed any further as things stand. If your appeal is rejected at the sift stage, that isn’t necessarily the end of it—you generally have a limited window, currently 14 days, to request an oral hearing, known as a Rule 3(10) hearing, where you can argue in person why permission to appeal should be granted after all.
It’s worth knowing that a March 2026 amendment to the Employment Tribunal Procedure Rules has also changed one procedural detail in this area—reconsideration refusals made on the basis that a substantially identical application has already been made and refused no longer need to be formally published, which is a technical change but reflects how actively this area of procedure continues to be refined.
The 42-Day Deadline
The standard time limit for lodging an appeal is 42 days, but when that clock starts depends entirely on how the tribunal delivered its decision.
Under the March 2026 procedural rules, tribunals can now provide “summary reasons” orally at the hearing. If this happens, you must formally request written full reasons within 14 days of the date the written record of the judgment was sent to you. If you make this request in time, your 42-day window to lodge an appeal begins on the date the written full reasons are sent to you. However, if you fail to request written full reasons within that 14-day window, the 42-day appeal deadline begins on the date the written record of the judgment was sent—and since an EAT appeal must be accompanied by the written full reasons, missing the initial 14-day request window can leave you unable to appeal at all.
This 42-day deadline is applied strictly, and your completed Notice of Appeal must be received by the EAT no later than 4:00 PM on the final day. There is very limited room for exceptions, which is exactly why identifying whether you need a reconsideration (which must be applied for within 14 days) or an appeal matters as much as it does. Given how much can turn on this timing, it is genuinely worth seeking advice as soon as you receive a decision, rather than waiting until closer to the deadline—especially since tribunal cases already take considerable time to reach a decision in the first place, before an appeal extends things any further.
What Happens If Your Appeal Succeeds?
A successful appeal doesn’t necessarily mean the outcome you wanted is immediately handed to you. In most cases, the EAT will remit the case — sending it back to the original tribunal, or occasionally a differently constituted one, to be reconsidered or reheard in light of the error identified. In more limited circumstances, where the correct outcome is genuinely clear on the facts already established, the EAT can substitute its own decision instead of sending the matter back. Which of these happens depends heavily on the nature of the error found and how much further fact-finding, if any, is genuinely needed.
Contact Us for Employment Tribunal Support
Deciding whether reconsideration or a full appeal is the right route — and then drafting grounds that actually identify a genuine error of law rather than simply restating disagreement with the outcome — is one of the more technical corners of tribunal procedure. Getting the early decision right matters considerably, given how unforgiving the deadlines involved are.
Final Thoughts
Appealing an Employment Tribunal decision isn’t simply a case of asking someone else to look at your case again — it’s a narrow, technical process focused specifically on errors of law, running alongside a completely separate reconsideration route for genuine administrative mistakes. Understanding which route actually fits your situation, and moving quickly given the strict deadline involved, puts you in a considerably stronger position than trying to work it out after time has already started running.Frequently Asked Questions
Can I appeal just because I disagree with the tribunal's decision?
No. An appeal to the Employment Appeal Tribunal is limited to correcting errors of law — misapplying the legal test, procedural unfairness, a perverse decision, inadequate reasons, or bias — not simply disagreeing with the tribunal’s assessment of the facts or evidence.
What's the difference between reconsideration and an appeal?
Reconsideration asks the same tribunal to correct a genuine administrative error or oversight in its own judgment. An appeal goes to a different body, the EAT, and is limited specifically to correcting errors of law. Using the wrong route can waste valuable time given the appeal deadline.
What is the sift stage?
It’s the initial review where an EAT judge considers your Notice of Appeal on the papers, without a hearing, to decide whether any of your grounds are reasonably arguable before the appeal is allowed to proceed further.
What happens if my appeal is rejected at the sift?
You generally have a limited window, currently 14 days, to request an oral hearing where you can argue in person why permission to appeal should be granted.
Can the side that won at tribunal still appeal?
In some circumstances, yes — a winning respondent can appeal if the tribunal’s reasoning could affect other proceedings or carry reputational consequences, even where the ultimate outcome favoured them.
What happens if I win my appeal?
Most successful appeals result in the case being sent back to a tribunal for reconsideration or a fresh hearing, rather than the EAT immediately awarding the outcome you wanted. In more limited cases, the EAT can substitute its own decision instead.