Losing your job is stressful enough. When you suspect the dismissal wasn’t fair, the uncertainty and urgency can feel overwhelming. This blog breaks down what counts as unfair dismissal in the UK, how tribunals look at these cases, the deadlines and steps to challenge a dismissal, and the remedies you can seek if you win. You’ll also find practical, step-by-step actions you can take today.

What is “unfair dismissal”?

Under the Employment Rights Act 1996, most employees gain the right not to be unfairly dismissed after a qualifying period of continuous service. For ordinary unfair dismissal claims, that qualifying period is two years. There are important exceptions (called “automatic unfair” reasons) where no minimum service is required.

Your dismissal may be unfair if your employer:

• Lacks a valid reason for ending your employment, or
• Fails to follow the proper disciplinary or dismissal process.

Tribunals ask two main questions:

Reason: Did the employer have a potentially fair reason?

• Capability/performance
  • Conduct
  • Redundancy
  • Statutory restriction (keeping you would break the law)
  • Some other substantial reason

Process:  Did the employer act reasonably and follow a fair procedure?

The Acas Code of Practice sets the minimum standards: proper investigation, chance to respond, a hearing, and an appeal.

When No Qualifying Period is Required

Some dismissal claims can be brought from the first day of employment, regardless of how long the person has worked for you. These fall into two main categories:

1. Automatically Unfair Dismissals

The law protects employees against dismissal for certain prohibited reasons, including:

• Pregnancy, maternity, or paternity leave
• Whistleblowing (protected disclosures)
• Raising health & safety concerns or acting as a safety representative
• Trade union membership or activities
• Asserting statutory rights (e.g., requesting minimum wage, holiday pay, rest breaks, or equal pay)
• TUPE-related dismissals (although some TUPE claims still require 2 years of service)

Where the dismissal is for one of these reasons, it is automatically unfair, and the employer cannot rely on “short service” as a defence.

2. Discrimination Claims

Under the Equality Act 2010, employees are protected from discrimination based on protected characteristics such as age, sex, race, disability, religion, sexual orientation, gender reassignment, or pregnancy/maternity.

Dismissals linked to discrimination can be challenged immediately, with no minimum service requirement. Importantly, there is also no cap on compensation for discrimination cases, unlike ordinary unfair dismissal claims.

Notice & Pay Obligations

Even where an employee has less than two years’ service, employers still need to observe basic contractual and statutory rights:

• If employed for one month or more, they must receive at least one week’s notice (unless dismissal is for gross misconduct).
• Wrongful dismissal claims can arise if notice or pay in lieu of notice is not given.
• Gross misconduct (e.g., theft, violence, fraud, serious health & safety breaches) is the only ground for immediate dismissal without notice.

Failing to handle notice correctly can turn a lawful dismissal into a costly claim.

Dismissing During Probation

Probationary periods often provide shorter notice and allow employers to test a new hire’s suitability. However, probation does not remove statutory protections.

Even while on probation, an employee can:

• Claim automatically unfair dismissal (e.g., if sacked for whistleblowing).
• Claim discrimination from day one.

This means probation should be used as a performance review tool, not as a “free pass” for dismissals. Employers should still document performance concerns and avoid decisions linked to discriminatory or unlawful reasons.

Risks for Employers

Although dismissing short-service employees may seem simpler, there are risks if the wrong approach is taken. Employers could face claims for:

• Automatically unfair dismissal – where dismissal falls within one of the protected categories.
• Unlawful discrimination – if linked to a protected characteristic.
• Breach of contract – if contractual disciplinary or dismissal procedures aren’t followed.

Compensation in these claims can be substantial, with discrimination claims carrying uncapped damages and potential awards for injury to feelings.

Best Practice for Employers

Even if the law allows for a simplified process, it is generally advisable to follow a fair and consistent approach. This protects the business from unnecessary claims and helps preserve staff morale and reputation.

Good practice steps include:

1. Invite the employee to a meeting in writing, allowing them to bring a representative.
2. Explain the concerns and give them a chance to respond.
3. Investigate further if needed, showing that their response was considered fairly.
4. Communicate the decision in writing, providing reasons and offering a right of appeal.
5. Keep a paper trail of discussions and decisions for evidence.

Following even a light-touch procedure demonstrates fairness and reduces the risk of claims based on discrimination or unfair motives.

Steps to Challenge an Unfair Dismissal

1. Make a timeline — Note start date, meetings, warnings, dismissal, appeal outcome.
2. Collect evidence — Contracts, policies, emails, letters, performance records.
3. Appeal internally — Use the employer’s appeal process. Highlight procedural flaws, unfair treatment, or protected reasons (pregnancy, whistleblowing, etc.).
4. Start Acas Early Conciliation — Essential before going to tribunal. It “stops the clock” while talks happen.
5. Consider settlement — Many cases settle. Think beyond money (e.g., reference wording, confidentiality).
6. File tribunal claim (ET1) — If not resolved, submit ET1 with Acas EC number before the deadline.
7. Mitigate your loss — Keep job-hunting records; tribunals reduce awards if you didn’t try to find work.

Strengthening Your Case

• Link to Acas Code: Show where the employer failed (e.g., no evidence disclosure, no fair hearing).
• Identify automatic unfair reasons if relevant.
• Check for discrimination — Claims involving race, sex, disability, age, etc. are uncapped.
• Stay consistent: Keep your story clear and evidence-based.

Conclusion

Challenging unfair dismissal requires speed, structure, and evidence. Calculate your deadline, start Acas conciliation, and build a clear case focusing on both reason and process. Many disputes resolve through settlement; if not, the tribunal can award meaningful compensation. For more information, contact us