When Does Probationary Dismissal Become Unlawful?

Probationary periods are commonly used at the start of employment to assess suitability for a role. During this time, employers often have more flexibility to end employment if expectations are not met. However, a dismissal during probation is not automatically lawful.

Under UK employment law, a probationary dismissal can still be challenged in an Employment Tribunal if it is unfair, discriminatory, automatically unfair, or carried out in breach of contract. The probationary status does not remove statutory protections.

What Is a Probationary Dismissal?

A probationary dismissal occurs when an employer terminates employment during an initial trial period, typically set out in the employment contract. Probationary periods usually range from three to six months but can vary.

Employers often use probation to assess:

• Performance and capability
• Conduct and behaviour
• Attendance and reliability
• Cultural or team fit

However, legal protections still apply from day one of employment in certain areas.

Is It Easier to Dismiss Someone on Probation?

From a practical perspective, dismissal during probation is often easier because:

• Notice periods may be shorter
• Employers may use simplified internal procedures
• Performance expectations are closely monitored from the start

However, legally, probation does not remove the requirement for fairness in relevant claims. Employees still retain core statutory rights.

When Probationary Dismissal Becomes Unlawful

A dismissal during probation becomes unlawful when it breaches employment law protections or contractual obligations.

1. Discrimination Under the Equality Act 2010

A probationary dismissal is unlawful if it is based on a protected characteristic, including:

• Age
• Disability
• Pregnancy and maternity
• Race
• Sex
• Religion or belief
• Sexual orientation
• Gender reassignment
• Marriage or civil partnership

Discrimination claims do not require two years' service and apply from day one of employment.

Examples include dismissal due to pregnancy, requesting reasonable adjustments, or biased treatment linked to protected characteristics.

2. Automatically Unfair Dismissal

A probationary dismissal is automatically unlawful if the reason relates to protected rights such as:

• Whistleblowing (reporting wrongdoing)
• Health and safety concerns
• Trade union membership or activities
• Asserting statutory rights (e.g. minimum wage, working time rights)
• Jury service
• Pregnancy or maternity-related reasons

In these cases, service length is irrelevant, and the employer's justification is not determinative if the prohibited reason is established.

3. Wrongful Dismissal (Breach of Contract)

Even during probation, dismissal may be unlawful if it breaches the employment contract. Common issues include:

• Failure to give contractual notice or pay in lieu of notice
• Ignoring contractual disciplinary or probation procedures
• Breach of express terms relating to termination

Wrongful dismissal focuses on contractual rights rather than fairness.

4. Unfair Dismissal (After Qualifying Service or Exceptions)

Most employees require two years' continuous service to bring an ordinary unfair dismissal claim. However, dismissal during probation may still be challengeable where:

• The dismissal is automatically unfair
• The employee has qualifying service in a previous continuous employment context
• The employer's process is so flawed that it breaches statutory requirements

Even where service requirements are not met, other legal claims may still apply.

5. Failure to Follow a Fair Procedure

While probation allows flexibility, employers are still expected to act reasonably. A dismissal may become unlawful where:

• No warnings are given in performance cases
• No feedback or opportunity to improve is provided
• There is no probation review process
• The employee is dismissed without explanation or meeting
• The decision is arbitrary or not evidence-based

Tribunals assess fairness based on whether the employer acted within the “range of reasonable responses.”

6. Breach of Probationary Procedure

If the employment contract or handbook sets out a probation process, failure to follow it may render dismissal unlawful. This may include:

• Skipping required review meetings
• Ignoring formal performance improvement steps
• Failing to extend probation where policy requires consideration
• Not allowing the employee to respond to concerns

Contractual probation procedures are enforceable in principle.

7. Retaliatory or Victimisation Dismissal

Dismissal during probation may be unlawful if it is linked to:

• Raising complaints or grievances
• Reporting legal breaches
• Participating in workplace investigations
• Supporting colleagues in complaints

Victimisation claims can arise under discrimination law or whistleblowing protections.

8. Lack of Evidence or Unreasonable Decision-Making

Even during probation, employers must base dismissal decisions on some evidence. Problems arise where:

• There is no documented performance concern
• Decisions are based on vague impressions or assumptions
• The employee is not informed of issues
• No opportunity is given to respond

While probation allows lower thresholds of formality, decisions must still be rational and evidence-based.

Role of Probation in Employment Law

Probation does not remove legal rights. It mainly affects:

• Notice periods
• Internal procedural expectations
• Speed of performance assessment

It does not remove protection against:

• Discrimination
• Whistleblowing detriment
• Breach of contract
• Automatically unfair dismissal

Tribunal Approach to Probationary Dismissals

Employment Tribunals assess:

• The reason for dismissal
• Whether legal protections apply
• Whether a fair process was followed (where required)
• Whether contractual obligations were breached
• Whether discrimination or prohibited reasons influenced the decision

The employer's discretion is wider during probation, but not unlimited.

Time Limits for Claims

Most tribunal claims must be brought within:

• Three months less one day from the effective date of termination

Before issuing a claim, the employee must usually complete ACAS Early Conciliation, which pauses limitation periods.

Remedies for Unlawful Probationary Dismissal

If a claim succeeds, possible outcomes include:

• Compensation for financial loss
• Injury to feelings (in discrimination cases)
• Basic and compensatory awards (for unfair dismissal where applicable)
• Reinstatement or re-engagement (rare in practice)

Compensation depends on the type of claim and loss suffered.

Common Scenarios

Probationary dismissal claims often arise where:

• Employees are dismissed after disclosing pregnancy or illness
• Concerns are raised about workplace rights or safety
• Performance issues are not properly communicated
• Employers act without explanation or documentation
• Discriminatory assumptions influence decisions

Key Principles

Probation does not remove employment rights. It simply reflects an early assessment period. A dismissal becomes unlawful if it breaches statutory protections, contractual obligations, or discrimination law.

The key legal focus is always the reason for dismissal and the fairness of the process where applicable, not the probationary status itself.

Key Takeaways

A probationary dismissal becomes unlawful when it is discriminatory, automatically unfair, in breach of contract, or procedurally improper in a way that falls below reasonable standards. While probation allows employers more flexibility, it does not remove core employment rights. Employees remain protected from day one against unlawful treatment, and tribunals will examine both the reason for dismissal and the manner in which it was carried out.