This guide is maintained as a current resource for July 2026 and covers only the laws of England and Wales. Information is for general guidance, not legal advice. Consult a qualified solicitor for advice specific to your situation.
Detailed guide to Polkey reductions in unfair dismissal claims in England and Wales. Explains how Employment Tribunals adjust compensation when procedural unfairness occurred but dismissal would likely have happened in any case, with clear examples, legal principles, and practical guidance.
In the law of unfair dismissal in England and Wales, a Polkey reduction can significantly affect the amount of compensation an employee receives from an Employment Tribunal even after successfully proving that a dismissal was unfair. This article explains what a Polkey reduction is, where it comes from, how it works in practice, and what employees and employers should understand about this legal principle. The explanation uses clear language to make complex legal concepts accessible to non‑experts while retaining accuracy for solicitors.
What Is Unfair Dismissal?
Before discussing Polkey reductions, it is essential to understand unfair dismissal. Under section 94 of the Employment Rights Act 1996 (ERA 1996), employees have a statutory right not to be unfairly dismissed. A dismissal may be unfair if:
- The employer did not have a fair reason to dismiss the employee (such as redundancy, capability, conduct or some other substantial reason); or
- The employer failed to follow a fair procedure in carrying out the dismissal.
If an Employment Tribunal finds that a dismissal was unfair, it may award compensation. Compensation typically includes a basic award and a compensatory award. The basic award is calculated using a statutory formula based on age, length of service and weekly pay. The compensatory award is intended to compensate the employee for financial loss resulting from the dismissal.
Origin of Polkey Reductions
The concept of the Polkey reduction originates from the landmark case Polkey v AE Dayton Services Ltd decided by the House of Lords in 1987. In that case, the court held that:
- Even if an employer's failure to follow a fair dismissal procedure made the dismissal unfair, a Tribunal must consider whether the dismissal would have occurred anyway (i.e. had a fair procedure been followed).
- If the Tribunal concludes that the employee would have been dismissed in any event, it may reduce the compensatory award to reflect the likelihood of that outcome.
This form of reduction is commonly known as a Polkey reduction or Polkey deduction.
Legal Basis in the Employment Rights Act
The statutory basis for reducing compensatory awards appears in section 123 of the Employment Rights Act 1996. Section 123(1) requires the compensatory award to be “just and equitable” in all the circumstances with regard to the loss sustained by the employee. This provision allows a Tribunal to adjust the award where a dismissal was procedurally unfair but would have happened regardless.
How a Polkey Reduction Works
A Polkey reduction applies only to the compensatory award, not to the basic award. The Tribunal must assess:
- Whether the dismissal was unfair because the employer breached a fair procedure; and
- The likelihood that the employee would still have been dismissed if the correct procedure had been followed.
The Tribunal estimates this likelihood and applies a reduction percentage to the compensatory award. The reduction reflects the probability (expressed as a percentage) that the dismissal would have occurred anyway. For example, if the Tribunal finds a 50% chance that a fair procedure would still have led to dismissal, the compensatory award may be reduced by 50%.
100% Polkey Reduction
If the Tribunal is satisfied that dismissal would definitely have occurred with a fair procedure, it may reduce the entire compensatory award by 100%. In such cases, the employee still retains the basic award but receives no compensation for financial loss.
Partial Reductions
The Tribunal might assess that there was some chance the dismissal would still have occurred but not a certainty. It then applies a reduction proportionate to the likelihood. For example, a 30% reduction reflects a finding that there was a 30% chance the dismissal would have occurred even with a fair procedure.
Practical Examples
Redundancy Scenario
If an employer fails to consult properly in a redundancy situation, a Tribunal might find the dismissal procedurally unfair. However, if the employer can show that, even with a fair consultation process, the role would still have been made redundant and the employee dismissed, the Tribunal may apply a Polkey reduction to the compensatory award.
Misconduct or Capability Cases
Polkey reductions can also apply in cases where an employee is dismissed for conduct or capability. For instance, if there was a procedural flaw but the evidence suggests that the employer would likely have dismissed the employee for legitimate reasons with a fair procedure, compensation may be reduced accordingly.
Interaction With Other Deductions
A Polkey reduction is not the only adjustment a Tribunal can make. Other factors include:
- Contributory Fault: If an employee's actions contributed to the dismissal, the Tribunal may reduce both basic and compensatory awards on a just and equitable basis.
- Mitigation: If the employee failed to take reasonable steps to mitigate their loss after dismissal, compensation may be reduced.
- ACAS Code Factors: Failure by either party to comply with the ACAS Code of Practice on disciplinary and grievance procedures can lead to increases or decreases of up to 25% on the compensatory award.
The order in which these deductions are applied is important and follows established Tribunal practice.
Considerations for Employers and Employees
For Employers
Employers defending an unfair dismissal claim should gather evidence to support any argument that, despite procedural failings, the dismissal would have occurred with a fair process. This may include documentation of performance concerns, business restructuring plans, redundancy criteria, or disciplinary files.
For Employees
Employees bringing a claim should be aware that even if liability is established (that the dismissal was unfair), the compensatory award may be reduced. Evidence that a fair procedure would have changed the outcome can be crucial. Employees should also consider mitigation steps such as seeking alternative employment promptly.
Common Questions About Polkey Reductions
Does a Polkey reduction mean the dismissal was fair?
No. A Polkey reduction applies after a finding that the dismissal was unfair. It only affects the amount of compensation, not the liability finding itself.
Can Polkey reductions apply in discrimination claims?
Yes. Polkey principles have been applied to reduce compensation in discriminatory dismissal cases where appropriate.
Is the basic award affected by a Polkey reduction?
No. Polkey reductions apply only to the compensatory part of an award.
Key Takeaways
A Polkey reduction is a legal mechanism in unfair dismissal claims under UK law that allows an Employment Tribunal to reduce the compensatory award where the dismissal was procedurally unfair but would probably have happened anyway if the correct procedure were followed. Originating from Polkey v AE Dayton Services Ltd, this principle ensures that an award reflects the real financial loss resulting from the procedural breach. While the basic award remains unaffected, compensatory awards can be reduced up to 100%. Tribunals must evaluate the likelihood of dismissal under a fair process and apply reductions accordingly. Polkey reductions interact with other deductions, such as contributory fault and mitigation, and are a key consideration for both employers and employees in unfair dismissal cases.
