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.
Comprehensive guide to how Employment Tribunals assess mitigation of loss in England and Wales, explaining the duty to mitigate, legal principles, evidence gathering, compensation adjustments and practical steps to protect your tribunal claim for financial losses after dismissal.
When an employee brings a successful claim to an Employment Tribunal, such as for unfair dismissal or discrimination, compensation for financial loss is often awarded. However, the tribunal will assess whether the claimant has taken reasonable steps to mitigate their loss. Mitigation refers to efforts made to reduce financial loss after dismissal or other wrongdoing by the employer. This article explains how tribunals assess mitigation of loss, the legal principles involved, evidence required, how reduction of compensation works, and practical considerations for claimants and employers.
What Mitigation of Loss Means
Mitigation of loss is a well-established legal principle that requires a claimant to try to limit financial losses arising from a tribunal claim. In an employment context, this commonly applies to loss of earnings following unfair dismissal: a dismissed employee must make reasonable efforts to find new employment or otherwise reduce income loss. If the claimant fails to take reasonable steps, a tribunal may reduce compensation to reflect what the claimant could have earned had mitigation occurred.
Legally, the duty to mitigate is recognised under the Employment Rights Act 1996 by reference to common law principles. The tribunal applies the same mitigation rules that apply to damages in contract and tort claims.
Legal Principles Governing Mitigation
Burden of Proof
The burden of proof rests on the employer (respondent) to show that the claimant has failed to mitigate loss. A claimant does not need to prove that they mitigated; the employer must present evidence that the claimant acted unreasonably in failing to reduce their losses. If the employer fails to present such evidence, a tribunal has no obligation to find mitigation failure.
Reasonableness Standard
Mitigation is judged by whether the claimant acted unreasonably, not whether they were obliged to take every reasonable step possible. Reasonableness, a question of fact, takes into account the claimant's personal circumstances, skills, and opportunities available at the time. Tribunals are advised not to apply an excessively strict standard, recognising that the claimant is the “victim” of the employer's wrong.
Duty Only Arises After Dismissal
The duty to mitigate takes effect after the dismissal (or other wrongful act), not before. For example, refusal of alternate work offered before dismissal will not generally constitute failure to mitigate.
What Counts as Mitigation
Typical mitigation involves reasonable efforts to obtain suitable alternative employment or income. This might include:
- Applying for jobs in the same field or with similar pay.
- Registering with recruitment agencies.
- Accepting suitable job offers or lower-paid work where appropriate.
- Considering self-employment or contract work if reasonable given the claimant's skills and the job market.
If a claimant is unable to work due to ill health, caring responsibilities, or other legitimate reasons, medical or other evidence may support why mitigation was not feasible.
Mitigation and Compensation
When calculating compensation, a tribunal starts with the claimant's actual loss (for example, earnings lost from the termination date). It then considers mitigation. If the claimant has taken reasonable steps and obtained alternative income, that income is deducted from the loss calculation. If the claimant has failed to mitigate unreasonably, the tribunal may reduce future loss to reflect what could reasonably have been earned.
Example of Mitigation Adjustment
If a claimant found a new job at a lower rate of pay, the tribunal may award loss for the difference between the old and new wage for the period reasonably needed to find suitable work. If no reasonable job search occurred, compensation may be reduced to reflect the period after which the claimant could reasonably have found alternative work.
Evidence to Support Mitigation
A claimant should assemble documentary evidence to show mitigation efforts, which is often included in the Schedule of Loss submitted early in proceedings. Relevant evidence may include:
- Records of job applications, interviews and outcomes.
- Copies of CV submissions to employers or agencies.
- Diary or log of job search activities.
- Evidence of training or skills development undertaken to improve employment prospects.
- Reasons for gaps in mitigation, supported by medical or childcare evidence if appropriate.
- Details of wages from any alternative employment or self-employment secured.
Careful record-keeping helps counter employer arguments that mitigation was inadequate and supports a tribunal's assessment of reasonableness.
How Tribunals Quantify Mitigation
Tribunals determine mitigation adjustments on a case-by-case basis. Rather than applying a fixed percentage reduction across the award, they normally:
- Establish the period loss occurred.
- Determine what earnings the claimant could reasonably have obtained.
- Deduct sums actually earned or that could reasonably have been earned if mitigation occurred.
Adjustment may affect only future loss, or both past and future loss depending on when the mitigation failure occurred. The overarching aim is to compensate the claimant for net loss, not to penalise them beyond what is just and equitable in all circumstances.
Practical Tips for Claimants
Start Mitigating Early
Begin job searches or other reasonable income-generating activity promptly after dismissal to strengthen mitigation evidence. Even modest efforts can demonstrate reasonable steps were taken.
Keep Detailed Records
Maintain a contemporaneous log of job applications, responses, interview dates, training undertaken, and any offers received. Copies of correspondence and advert printouts help substantiate mitigation efforts at hearing.
Address Legitimate Barriers
If personal circumstances limit your ability to mitigate (for example, serious illness), gather supporting evidence such as medical reports to explain gaps in job search efforts. Tribunals consider these factors when assessing reasonableness.
Consider Suitable Alternatives
Be open to a range of reasonable alternatives, potentially including self-employment, freelance work or lower-paid roles, provided they are appropriate given your experience and market conditions. This can reduce employer arguments that mitigation was lacking.
Common Questions
Is mitigation required under all tribunal claims?
Mitigation is most commonly assessed in compensation claims for unfair dismissal and discrimination where earnings loss is claimed. It may also be relevant to other claims involving financial loss. The test is whether reasonable steps could have reduced loss.
What if I reject a job offer that pays less than my old job?
Refusing a job with significantly lower pay may be considered reasonable; tribunals assess reasonableness in context. However, unreasonably rejecting suitable offers without good cause may be viewed as failing to mitigate.
Does receiving benefits affect mitigation?
Benefits may be taken into account when calculating net loss, and failing to claim benefits you are entitled to could be seen as a failure to mitigate if they could offset financial loss.
Can self-employment count as mitigation?
Yes. If self-employment or consultancy work generates income and is a reasonable alternative given your skills, tribunals may regard this as mitigation and apply the appropriate earnings to reduce loss.
Key Takeaways
Mitigation of loss is a key consideration in Employment Tribunal compensation. Claimants are expected to take reasonable steps to reduce their financial loss after dismissal or other employer wrongdoing. Tribunals assess mitigation by examining whether efforts such as job searching or alternative income generation were reasonable in all circumstances. Evidence of mitigation, properly documented, can influence the size of an award: successful mitigation generally reduces loss, while failure to mitigate may reduce compensation. The burden lies with the employer to prove mitigation failure, and tribunals consider individual circumstances when assessing reasonableness. Understanding mitigation principles and gathering appropriate evidence helps claimants achieve fair compensation for their losses.
