What does ‘mitigation of loss’ mean?
You have a duty to mitigate your loss if you are unfairly dismissed. This means that you should minimise your losses by taking steps to find another job. The Employment Tribunal would not expect you to take the first job that comes along, particularly if it is a lower paid job but your Compensatory Award may be reduced if you don’t provide evidence that you have actively tried to find another job. This page provides important information about mitigation of loss, including what the Employment Tribunal will do, and how you should frame your mitigation statement to avoid loss of compensation. [ see Employment Tribunal Mitigation Statement]
Mitigation of loss is about your duty to reduce your losses on dismissal, by taking steps to find another job. Your Compensatory Award can be reduced if you don’t provide evidence that you have actively tried to find another job. It is up to your Employer to prove that you have not mitigated your loss. You must include evidence of your attempts to mitigate your loss in your schedule of loss.
Section 123 (4) Employment Rights Act 1996 says that the compensatory award for unfair dismissal should be what the Employment Tribunal considers just and equitable in all the circumstances, having regard to the loss sustained by the Employee, insofar as that loss is attributable to action taken by the Employer. In assessing that loss, the Employment Tribunal should use the principles of common law damages, which impose a duty on the victim to take reasonable steps to mitigate his losses.
What is reasonable?
What is reasonable in any particular case will vary according to your personal circumstances, but generally you will be expected to apply for any appropriate jobs.
In Archbold Freightage Ltd v Wilson  IRLR 10, the Court said that an Employee’s duty is;
“… to act reasonably and to act as a reasonable man would do if he had no hope of seeking compensation from his previous Employer. It follows from that that he should accept alternative employment if, taking account of the pay and other conditions of that employment it is reasonable so to do.”
The Norton Principle
If you are successful in finding a new job, the calculation of your compensation will deduct your wages from the new job. If your new job pays less than your old one, the difference will be reflected in the award for your continuing losses (Smith Kline & French Laboratories Ltd. v Coates  IRLR 276).
There is an exception if you are dismissed without notice. If you are dismissed without notice, then you do not have to deduct wages that you would have earned during your notice period if your Employer had given you the requisite notice. This was decided in the case of Norton Tool Co Ltd v Tewson NIRC 1972 ICR 50, NIRC where the Court decided that Employment Tribunal can award compensation covering the notice period, even if the dismissed Employee had found other paid employment during that period. This is known as the Norton Principle.
The Norton Principle does NOT apply where you are claiming constructive dismissal. Constructive dismissal is when you walk out of a job because of something that your Employer has done which has fundamentally breached the employment contract. In the case of Stuart Peters Ltd v Bell  the Court of Appeal said that the rule about mitigation of loss only applies to employees who are dismissed by their Employer and not to Employees who have walked out of a job because of the actions of their Employer.
How the Employment Tribunal works it out
There is no particular formula in law for working out how the deduction for failing to mitigate your losses should be worked out. In Savage v Saxena , the Employment Appeal Tribunal suggested that the Employment Tribunal should ask itself the following questions to determine whether an Employee has mitigated their loss;
- What steps should the Employee have taken to mitigate their loss?
- On what date would such steps have produced an alternative income?
Once these questions are answered the Employment Tribunal can reduce compensation accordingly.
In Cooper Contracting Limited v Lindsey , the Employment Appeal Tribunal provided useful guidance on the legal principles to be applied regarding an Employee’s duties in mitigation of loss. In this case, Mr. Lindsey had been employed by Cooper Contracting as a carpenter. The Employment Tribunal found that he had been unfairly dismissed and awarded him compensation based on his loss of income to the date of the remedy hearing and future loss of earnings for 3 months.
After being dismissed Mr. Lindsey became self-employed as a carpenter. Cooper Contracting appealed to the Employment Appeal Tribunal arguing that Mr. Lindsey had failed to mitigate his loss because he had chosen self-employment at a lower level of income when there were “other opportunities out there for employed work with higher remuneration if the Claimant wished to look for them”.
The Employment Appeal Tribunal threw their case out because in choosing to take up self-employment Mr. Lindsey had not acted unreasonably and had not failed to mitigate. Even though there were good reasons why Mr. Lindsey should have mitigated his losses by taking up an employed position immediately after his dismissal, that did not mean in all the circumstances that he had acted unreasonably by not doing so. This was not a case where Mr. Lindsey had set his heart on some unrealistic or theoretical next career move. His personal reasons for preferring self-employment were not open to argument. There was therefore no failure to mitigate. The Employment Appeal Tribunal went through the decided cases on this point and arrived at a series of principles as follows;
- It is up to the Employer to prove that the Employee has not mitigated their loss. If the Employer does not present evidence of any failure to take reasonable steps to find another source of income, the Employment Tribunal will not take account of any lost opportunities to mitigate against the Employee.
- The often-quoted formula that the Employee must take “all reasonable steps” to mitigate is wrong – delete the “all”, since otherwise a single inadvertent failure among many other efforts would still count as a breach of that duty.
- The Employee must be shown to have acted unreasonably. That is a different test from his showing that what he did was reasonable. Since there may be a number of reasonable responses to a particular set of circumstances, an Employee will not be at fault if he pursues one rather than others, even if it turns out not to be a sensible choice.
- It is the Employment Tribunal’s view of what is unreasonable which matters, though they will take the views and wishes of the Employee into account. “The Tribunal is not to apply too demanding a standard to the victim; after all, he is the victim of a wrong. He is not to be put on trial as if other losses were his fault “.
Employment Appeal Tribunal (EAT) guidance on mitigation of loss
In the case of Cooper Contracting Ltd v Lindsey 
, the EAT gave a summary of principles that Employment Tribunals should apply when they are considering whether the amount of compensation should be reduced because the employee did not mitigate his loss after being unfairly dismissed.
Mitigation and Internal Appeals
Your duty to mitigate your loss only arises after you have been dismissed so you will not be in breach of your duty to mitigate if you don’t appeal the decision to dismiss you- Seligman & Latz Ltd. v McHugh  IRLR 130. However, you need to take into account the provisions of the ACAS Code of Practice on Discipline and Grievance Procedures which says you should appeal your dismissal. Breach of the code by either an Employer or an Employee can lead to a 25% reduction or increase in the amount of the award.
Rejecting an offer of reinstatement
If you refuse an offer from your Employer to reinstate you in your old job, the Employment Tribunal will consider whether your rejection of the offer was reasonable in the circumstances. It may be that the mutual trust and confidence between you and your Employer has been irreparably damaged so that you don’t feel you can go back to work for your Employer. If the Employment Tribunal believes that your refusal is unreasonable you will not receive any compensation or your compensation may be reduced.
In Wilding v British Telecom , Mr. Wilding had been unfairly dismissed and discriminated against on the ground of his disability. He refused an offer of part-time re-employment from British Telecom. The Court of Appeal said that a claimant had to consider offers reasonably, and without considering that they may be entitled to compensation if they reject the offer. The Court said that the correct test for deciding whether an Employee is reasonable in rejecting an offer is as follows;
- It is your duty as an Employee to look for a job without thinking about how much compensation you could get.
- It is up to your Employer to prove that you have unreasonably rejected an offer of reinstatement.
- The test of whether you have been unreasonable is an objective test based on all the evidence.
- In applying that objective test, the attitude of the Employer, the circumstances in which the offer was made and refused and the way in which you had been treated must be taken into account.
- The Employment Tribunal must not be too rigid in its expectations of you.
Education or self-employment as mitigation of loss
You can choose to set up your own business or return to education without it being seen as a breach of the duty to mitigate your loss. You can still make a claim for loss of earnings in this situation. The Employment Tribunal would consider whether your decision to be self-employed or return to education was reasonable in the circumstances of the case. In Gardiner-Hill v Roland Berger Technics Ltd  IRLR 498 the Court said that it was reasonable for a 55-year-old managing director to start his own business. In such a case the costs of setting up another business could form part of your claim.
Returning to education can also be a reasonable course of action for you to take. In the case of Archbold Freightage Ltd v Wilson  IRLR 10, the Court said that the relevant consideration of the Employees actions in returning to education was whether,
“Acting purely in his own interest, has he acted reasonably by pursing retraining/further education with a view to keeping his loss to a minimum?”
If your course is long, for example a degree course the Employment Tribunal could decide that the connection between your Employer’s actions in dismissing you and the loss you suffered has been broken (this is called the chain of causation), and choose not to compensate you for your loss. In the case of Khanum v IBC Vehicles Ltd , Ms. Khanum won her unfair dismissal and discrimination claims. Her Employer blacklisted her so she could not find a job and she began a degree course after 10 months looking for work.
The Employment Tribunal found that Ms. Khanum had no choice but to take up a degree course and that it was a sensible decision for her to take, but the chain of causation was broken and so it would not be right to award compensation from the point when she started her degree. The Employment Appeal Tribunal disagreed. It said that the correct test is whether the decision to start education is a direct result of the Employer’s decision to dismiss. The Employment Appeal Tribunal said there were special factors in this case, notably the blacklisting by an Employer who held a dominant market position in a specialised field. On this basis, Ms. Khanum received her award for future losses.