What does a Polkey deduction mean?
A Polkey deduction is a deduction made from a compensatory award in an unfair dismissal case to reflect the chance that although a dismissal was procedurally unfair it would have happened in any case.
A claim for unfair dismissal may succeed on the grounds that the employer failed to follow a fair procedure in every respect. However, in such a case it will still be possible for an employer to argue that even if a fair process had been observed, the employee would still have been dismissed.
This can lead to any award for compensation being reduced – a ‘Polkey’ reduction – based on the tribunal’s view of the likelihood of dismissal occurring. The actual reduction is a matter for the discretion of the employment tribunal and can range from nil to 100%.
This principle was set out in the case of Polkey v AE Dayton Services Ltd [1987].








