An appeal works best as a structured challenge to identified findings, procedure or outcome. It should not merely repeat the original account.
Use this guide to identify what should have happened, which records should exist and which questions still need an answer.
Key points
- Start with employment status and the exact event.
- Separate contract, policy, statutory right and good practice.
- Ask for reasons and records that can be tested.
- Keep internal and external deadlines on separate calendars.
Grounds
Choose the reason for each challenge
| Ground | What to identify |
|---|---|
| Factual error | The finding, the evidence contradicting it and why the error matters. |
| Missing evidence | What was not obtained or considered and the point it could establish. |
| Procedural unfairness | The step omitted and how that affected your ability to answer or the reliability of the decision. |
| Inconsistency | A genuinely comparable case or departure from policy. |
| Disproportionate outcome | Relevant mitigation and a more appropriate result. |
| New evidence | What it is, why it was unavailable and how it could change the decision. |
Start with the policy and deadline
Check who receives the appeal, the internal deadline, required format and possible outcomes. If the deadline is short, submit concise grounds and say when supporting documents will follow. Do not let perfection cause you to miss the route entirely.
Ask for an impartial review
The Acas Code says appeals should be handled without unreasonable delay and impartially, wherever possible by a manager not previously involved. Ask whether the appeal is a review of the papers or a rehearing. That affects how you present witnesses, disputed evidence and new material.
State the remedy for each ground
Say whether you seek a finding to be reversed, a warning reduced or removed, an investigation reopened, a grievance issue determined, a rehearing, reinstatement or another specific correction. A list of complaints without a requested outcome is harder to determine.
Internal appeal and tribunal limitation are separate
Appealing does not normally extend an employment tribunal deadline. Record the date the cause of action occurred and protect the Acas notification deadline separately. An appeal may still be important evidence of what the employer knew and had an opportunity to correct.
What can you realistically ask for?
- A clear written explanation of the decision and the rule used.
- Correction of factual or procedural errors.
- A reconsideration, meeting, appeal or grievance outcome where appropriate.
- Preservation and disclosure of the material needed to understand the decision.
- A specific practical remedy rather than a general request to “deal with it”.
Evidence worth keeping
Preserve original, dated records. Keep a short chronology linking each item to the fact it may prove.
Common employer responses, and what they do not necessarily prove
| Employer says | What to check |
|---|---|
| “You are just repeating yourself.” | A properly framed appeal identifies the precise finding, defect and requested correction. |
| “HR approved the first outcome.” | That does not answer a factual or procedural appeal ground. |
| “The appeal means you have extra time for tribunal.” | Internal appeals do not normally stop or reset the external limitation clock. |
What to say next
Adapt the wording to the facts. Do not state that a right definitely applies until you have checked status, eligibility, dates and the correct legal route.
What to do
A practical next-step plan
- Record the event, decision, date, people involved and practical effect.
- Identify the contractual, policy and statutory routes separately.
- Request the precise reason and the smallest useful evidence set.
- Use the internal process and ask for a defined remedy.
- Protect the Acas and tribunal deadline independently of internal discussions.
Escalation and time limits
For most employment tribunal claims whose time limit starts on or after 1 October 2026, the primary limit is now six months minus one day. If the time limit started before that date, the earlier three-month-minus-one-day framework usually continues to apply. Some claims have different limits, including statutory redundancy pay, and interim relief in certain dismissal cases can require action within seven days.
An internal request, grievance, disciplinary process or appeal does not normally stop the tribunal clock. Notify Acas within the applicable limit. Early conciliation pauses the clock only within the statutory scheme, and the calculation can be technical where there are several acts or respondents.
Official sources
Check the current source material.
ConsumerWise provides general information rather than individual legal advice. Check current rules, dates, status and eligibility against the official source before acting.