An employee dismissed without cause in Ontario is often managing two things at once: assessing a severance offer, and looking for new work. When the job search succeeds quickly, a common worry follows close behind. Does accepting a new position wipe out the severance claim? The short answer is no — but it does change the arithmetic, and understanding exactly how is essential to negotiating from an informed position.
The doctrine at work is the duty to mitigate. It affects only one of the two layers of an Ontario termination entitlement: the common law layer, never the statutory minimums under the Employment Standards Act, 2000. Because the interaction between new earnings and the notice period is numerical, it helps to start with a clear picture of the full entitlement before any mitigation adjustment, and then work through how replacement income affects it. The two layers themselves — the ESA floor and the common law range — are explained in more detail in our guide to ESA minimums versus common law severance.
What the Duty to Mitigate Is — and What It Never Touches
At common law, an employee terminated without adequate notice is entitled to damages measured by the compensation they would have earned during the reasonable notice period. Those damages are subject to a general principle of contract law: a party claiming damages must take reasonable steps to reduce the loss. For a dismissed employee, that means making reasonable efforts to find comparable replacement employment. Earnings from new employment during the notice period are deducted from the common law damages, because the purpose of the award is to compensate for lost income, not to provide income twice over for the same period.
The critical boundary is that mitigation operates only on the common law layer. The statutory minimums under the Employment Standards Act, 2000 are not damages; they are entitlements owed in every qualifying termination regardless of what happens afterward. Termination pay — one week per completed year of service for employees with three or more months of service, capped at eight weeks — is payable in full even if the employee starts a better-paying job the following Monday. The same is true of statutory severance pay for employees who qualify: five or more years of service, where the employer has an Ontario payroll of $2.5 million or more or a qualifying mass termination has occurred, at one week per year of service (prorated for partial years) to a cap of 26 weeks. Benefits must continue through the statutory notice period. None of this is reduced by new earnings.
The practical consequence is that the common law range remains the correct starting point for assessing any offer, whether or not the employee has found work. Mitigation adjusts the damages calculation; it does not replace the reasonable notice framework, and it never reduces the entitlement below the ESA floor.
What "Reasonable Efforts" Means — and Who Must Prove Otherwise
The duty to mitigate is a duty of reasonable effort, not a duty of success and not a duty to take any job at any price. The standard is comparable employment: work that is broadly similar in status, responsibility, and compensation to the position lost. An operations manager is not obliged to accept a minimum-wage retail position to satisfy the duty, and a professional is generally not required to abandon their field at the first setback. What counts as reasonable depends on the employee's qualifications, the state of the relevant job market, the length of the notice period at issue, and the employee's personal circumstances.
Just as important is where the burden of proof sits: on the employer. An employee does not have to prove they mitigated. An employer alleging a failure to mitigate must prove two things — that the employee did not take reasonable steps to find comparable work, and that comparable work would likely have been found had reasonable steps been taken. Courts have consistently treated this as a demanding burden. An employer that merely gestures at job postings, without showing that the employee's actual search was deficient and that those specific opportunities were realistically attainable and comparable, will generally fail to discharge it.
This allocation matters in negotiation. Employers sometimes assert failure to mitigate as a bargaining lever, suggesting that an imperfect job search justifies a discounted offer. An employee who has conducted a genuine, documented search can respond that the employer would have to prove both branches of the test in court — something that is rarely accomplished.
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Calculate My EntitlementsHow a New Job Changes the Numbers: Three Scenarios
The effect of re-employment on a claim is best understood by working through the common scenarios. In each, the ESA minimums are untouched; the adjustments happen only within the common law layer.
Finding comparable work quickly
Suppose an employee with a common law reasonable notice entitlement in the range of twelve months finds a comparable position at equivalent pay three months after termination. The claim does not disappear. The employee retains the full ESA minimums, plus common law damages for the three-month gap between termination and the new job's start date — the period in which the loss was actually suffered. Damages for the remaining nine months of the notional notice period are offset by the new earnings. Even a quick re-employment therefore leaves a real claim: the statutory amounts plus the gap period, which for many employees still exceeds what the employer initially offered.
Finding lower-paying work
Where the new position pays less than the old one, the deduction from damages is only the amount actually earned. The employee may claim the differential — the shortfall between the old compensation and the new — for the remainder of the reasonable notice period. An employee who earned $100,000 and mitigates into an $80,000 role has reduced the loss, not eliminated it, and the $20,000 annualized difference remains recoverable for the balance of the notice period. Compensation for this purpose is assessed broadly: base salary, and typically bonus, benefits, and other regular components of the package the employee would have received during notice.
An offer to return to the same employer
Occasionally the dismissing employer itself offers re-employment — sometimes in the same role, sometimes in a modified one — and argues that refusal amounts to a failure to mitigate. Courts have recognized that in some circumstances a reasonable person would accept such an offer, and in others no reasonable person would. The factors are contextual: whether salary and duties are equivalent, whether working conditions would be substantially different, whether the relationship has become acrimonious, and whether returning would be humiliating or embarrassing given how the dismissal unfolded. Neither refusal nor acceptance carries an automatic consequence. Because this scenario turns so heavily on its facts, and because responding to it poorly can affect both the claim and the relationship, it is an area where legal advice before responding is particularly valuable.
Why a Signed Settlement Is Not Clawed Back
A question that arises constantly: an employee signs a severance settlement, then lands a new job two weeks later — can the employer demand the money back? Under a typical lump-sum settlement, no. A settlement is a contract. Once the parties have agreed on a figure and signed a release, the deal is complete, and the employee's subsequent good fortune does not reopen it. The employer bought certainty; the employee's re-employment risk was part of what both sides priced into the number.
This is also why timing has strategic weight on both sides of the table. An employer negotiating with an employee who has not yet found work faces genuine uncertainty about how long the loss will run, which is precisely the uncertainty a settlement resolves. The only situation in which new employment reduces a settled amount is where the settlement agreement itself says so — which leads to the distinction between settlement structures below. An employee reviewing a proposed agreement should read the payment terms carefully before signing; our guide on whether to sign a severance offer covers what else to look for.
Keeping Records of the Job Search
Because the employer bears the burden of proving a failure to mitigate, the employee's best protection is a contemporaneous record of the search. That record should capture applications submitted (position, employer, date), copies of cover letters and tailored resumes, responses and rejections, interviews and their outcomes, networking meetings and recruiter contacts, and any courses or certifications pursued to improve employability. A running log or spreadsheet maintained week by week is more credible than a summary assembled after a dispute has crystallized.
The record does double duty. It defeats any suggestion that the search was not genuine, and it demonstrates that the positions pursued were comparable — which answers the occasional employer argument that the employee aimed too narrowly or too high. Employees receiving Employment Insurance benefits are already required to be available for and seeking work, and the documentation habits overlap; maintaining one thorough record serves both purposes.
Clawback Clauses vs. Lump-Sum Settlements
Severance settlements in Ontario tend to follow one of two payment structures, and the difference determines how new employment affects the money.
A lump-sum structure pays a fixed amount, usually shortly after the release is signed. The figure is final: if the employee finds work quickly, they keep the full amount, and if the search takes longer than expected, there is no top-up. The re-employment risk is priced in once, at signing.
A salary continuance structure with a clawback pays the settlement as continued salary over a defined period, with a clause providing that payments stop — or are reduced, commonly by half of the remaining balance — if the employee finds new employment before the period ends. Employers propose this structure because it caps their cost if the employee mitigates quickly; some clawback clauses soften the effect by paying out a portion of the remaining balance upon re-employment, which preserves some incentive for the employee to keep searching energetically. Continuance structures also raise practical questions worth examining before agreement: what triggers the clawback (any work, or only comparable work), whether benefits continue during the period, and what disclosure obligations the employee takes on.
Neither structure is inherently better; the right choice depends on the employee's reemployment prospects and appetite for risk. What matters is recognizing that the structure is itself a negotiable term, not boilerplate.
Practical Next Steps
For an employee weighing an offer while job-searching, the sequence is the same as in any Ontario termination: establish the full two-layer entitlement first, then assess how mitigation realistically affects it. The severance calculator provides an estimate of the ESA minimums and the common law range based on the specific employment details. From there, the questions become practical — how the offer compares to the entitlement, how the payment structure treats future earnings, and whether the timing of a settlement should come before or after the job search concludes. An employee who wants the entitlement asserted formally can present the calculation to the employer in a demand letter, and one who wants professional guidance on the mitigation questions specifically — a return offer, a clawback clause, an employer alleging a deficient search — should consult a licensed Ontario employment lawyer before responding.
Frequently Asked Questions
Q1: Does finding a new job mean I lose my severance in Ontario?
No. Finding a new job never eliminates the statutory minimums under the Employment Standards Act, 2000. Termination pay, and statutory severance pay where the qualifying conditions are met, are owed regardless of whether the employee finds new work the next day. What new employment can affect is the common law portion of the claim: damages for the reasonable notice period are reduced by earnings from replacement employment during that period. Even then, the employee keeps the damages for the gap between termination and the new job's start date, and if the new position pays less, the employee may claim the difference for the remainder of the notice period. A new job changes the arithmetic of a wrongful dismissal claim; it does not erase the claim.
Q2: Are ESA termination pay and severance pay reduced if I find new work?
No. The Employment Standards Act, 2000 minimums are statutory entitlements, not damages, and they are not subject to the duty to mitigate. Termination pay of one week per completed year of service (for employees with three or more months of service, capped at eight weeks) is owed in full even if the employee starts a new position immediately. The same is true of statutory severance pay for qualifying employees: those with five or more years of service whose employer has an Ontario payroll of $2.5 million or more, or where a qualifying mass termination has occurred. Benefits must also continue through the statutory notice period. Mitigation is a common law doctrine that operates only on the common law layer of the entitlement.
Q3: Who has to prove a failure to mitigate in a wrongful dismissal case?
The employer. An employee claiming common law reasonable notice damages is expected to make reasonable efforts to find comparable work, but the employee does not have to prove that they mitigated. It is the employer who must establish a failure to mitigate, and the burden has two parts: the employer must show both that the employee did not take reasonable steps to find comparable employment, and that comparable employment would likely have been found had those steps been taken. Courts have described this as a difficult burden to meet, and speculation that the employee could have found something is not enough. In practice, an employee who conducts a genuine, documented job search is rarely found to have failed to mitigate.
Q4: Do I have to accept my former employer's offer to take me back?
It depends on the circumstances, and this is one of the more contested corners of mitigation law. Courts have recognized that in some situations a dismissed employee may be expected to accept re-employment with the same employer as part of mitigation, but only where a reasonable person in the employee's position would do so. Relevant considerations include whether the salary and duties are the same, whether the working relationship remains workable, and whether the dismissal or subsequent conduct has been humiliating, acrimonious, or embarrassing. Where trust has broken down or the return would be degrading, refusing the offer is generally not a failure to mitigate. Because the analysis is so fact-specific, an employee weighing a return offer benefits from legal advice before responding.
Q5: What records should I keep of my job search after termination?
A dismissed employee claiming common law damages should keep a contemporaneous record of the entire job search: positions applied for with dates and job titles, copies of applications and cover letters, responses received, interviews attended, networking efforts, recruiter contacts, and any retraining or upskilling undertaken. A simple log or spreadsheet maintained as the search proceeds is far more persuasive than a reconstruction assembled months later. These records serve two purposes: they answer any allegation that the employee failed to make reasonable efforts, and they document the comparability of the positions pursued. Since the employer bears the burden of proving a failure to mitigate, a well-documented search makes that burden close to impossible to discharge.
Jordan is an Ontario employment lawyer (J.D., licenced member of the Law Society of Ontario) and the founder of DemandPay, a platform that helps terminated employees understand and negotiate their termination packages. DemandPay provides legal information, not legal advice. More about Jordan