Ontario Severance

Constructive dismissal — Ontario Employment Law

307 casesDecisions from 1980–2026

See all 401 cases that mention constructive dismissal

About Constructive dismissal

Have you ever felt forced to quit your job? Not because you found a new one, but because your employer made your work situation unbearable? This is the core idea behind constructive dismissal. In Ontario, constructive dismissal happens when an employer makes a significant, one-sided change to a fundamental term of your employment contract, or engages in conduct that shows they no longer intend to be bound by the contract. While you are the one who resigns, the law treats it as if your employer terminated you without cause.

These changes, often called 'unilateral changes', must be substantial. Minor inconveniences typically do not qualify. Common triggers for a constructive dismissal claim include a significant cut in your pay or hours, a demotion in title or responsibilities, a forced relocation to a different city, or a failure by the employer to address a toxic or harassing work environment. As established by common law in Ontario, even a temporary layoff can be considered a constructive dismissal if your employment contract does not explicitly give the employer the right to lay you off.

To succeed in a claim, an employee must generally prove two things. First, that the employer's action was a serious breach of the employment contract. Second, that a reasonable person in the employee's position would have felt that the employer's conduct made continued employment impossible. It is crucial to act quickly. If you continue to work under the new, changed conditions for too long without formally protesting, you may be seen as having accepted the changes, thereby losing your right to claim constructive dismissal. Because the decision to resign carries significant risk, understanding whether your situation meets the high legal threshold for constructive dismissal is a complex matter where professional guidance is invaluable.

Frequently Asked Questions

What's the difference between quitting and constructive dismissal?

When you quit voluntarily, you are not entitled to any notice or severance pay. In a constructive dismissal, you also resign, but because your employer forced the situation by fundamentally changing your job, the law treats your resignation as a termination. This means you can claim wrongful dismissal and seek termination pay or notice.

How long do I have to resign if I think I've been constructively dismissed?

There is no exact deadline, but you must act in a timely manner. If you continue to work under the new conditions for weeks or months without protest, a court may decide you 'condoned' or accepted the change. This is a fact-specific issue, and the acceptable timeframe can vary.

My boss cut my pay by 10%. Is that constructive dismissal?

It might be. While there is no magic number, courts in Ontario have generally considered a pay cut of 15-20% or more to be substantial enough to trigger a constructive dismissal. A 10% cut is on the borderline and its significance would depend on other factors in your specific situation.

Can a temporary layoff be a constructive dismissal in Ontario?

Yes. Unless your employment contract explicitly gives your employer the right to place you on a temporary layoff, doing so is a breach of contract and can be treated as a constructive dismissal under common law. This is true even though the Employment Standards Act, 2000 (ESA) has rules governing layoffs.

What happens if I resign and a court decides it wasn't constructive dismissal?

This is the main risk for an employee. If you resign and a court later rules that the employer's actions were not severe enough to constitute constructive dismissal, your resignation will be treated as a voluntary quit. In that case, you would not be entitled to any notice, severance, or termination pay.

My job has become unbearable due to a toxic manager. When should I get legal advice?

You should seek legal advice as soon as you believe the environment is becoming intolerable and before you decide to resign. A lawyer can help you assess whether the conduct meets the legal test for a harassing environment leading to constructive dismissal and advise you on how to document the issues and what steps to take next.

Common Scenarios

  • After a company restructuring, a senior project manager is reassigned to a non-managerial role with fewer responsibilities, despite her salary remaining the same.
  • A full-time graphic designer is informed that her hours are being permanently reduced from 40 to 20 per week due to a slowdown in business.
  • An employee is placed on an indefinite 'temporary layoff' during a non-emergency period, but their employment agreement contains no clause permitting layoffs.
  • A sales executive who has always worked remotely from Toronto is told they must now report to a new office in Ottawa three days a week.
  • An employee makes repeated, documented complaints to HR about a supervisor's bullying and harassment, but the company takes no meaningful action to stop the behaviour.

What You Should Know

  • Do not resign immediately. Before you take any action, formally protest the change to your employer in writing, stating that you do not accept it.
  • Document everything. Keep a detailed record of the changes, including dates, conversations, emails, and the impact on your work and well-being.
  • Understand the risk of acceptance. Continuing to work under significantly changed conditions for an extended period without complaint can be interpreted as your acceptance of those new terms.
  • Before you decide to quit and claim constructive dismissal, seek advice from an Ontario employment lawyer. They can provide a professional opinion on whether your situation meets the legal test and guide you on the best course of action.

Featured Cases

T. v. Salytics Inc.

2026 ONCA 621 (CanLII) · 2026-09-03

T. v. Salytics: Constructive Dismissal Appeal

The Court of Appeal for Ontario dismissed an appeal challenging a ruling that a temporary lay-off clause was not a termination clause under the Employment Standards Act, 2000. The court addressed whether the lay-off constituted constructive dismissal at common law and interpreted the employment agreement's substance over form, confirming that the clause incorporated ESA requirements.

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F. v. Susur Lee Group Inc.

2026 ONSC 4380 (CanLII) · 2026-07-28

Constructive Dismissal Appeal: Condonation and Mitigation

This is an appeal to the Divisional Court from a trial judge's decision in a constructive dismissal case involving the Susur Lee Group Inc. The appeal addressed whether the employee's silence and delayed proceedings constituted condonation of the employer's repudiatory breach, whether ESA payments during a closure amounted to a return to work, and whether continued work could serve as mitigation. The Divisional Court found legal errors in the trial judge's analysis regarding condonation, the effect of ESA payments, and mitigation, allowing the appeal and ordering a new trial.

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F. v. ProRich Seeds (2016) Inc.

2026 ONSC 4161 (CanLII) · 2026-07-16

Constructive Dismissal: Dependent Contractor Awarded 21 Months Notice

This case addresses whether a salesperson was an employee, independent contractor, or dependent contractor, ultimately finding dependent contractor status. The court held that the employer's unilateral withholding of a long-standing monthly advance constituted constructive dismissal, entitling the plaintiff to reasonable notice.

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N. v. Township of Morley

2026 ONSC 3772 (CanLII) · 2026-06-26

Constructive Dismissal: Potter Test Applied

This wrongful dismissal case addressed whether the Township of Morley's actions constituted a constructive dismissal of the employee. The court found that the employer did not unilaterally change an essential term of the contract and that a reasonable employee would have persevered, thus constructive dismissal was not established. Consequently, the claim for damages was dismissed, although an alternative assessment of notice was noted as one year reduced to six months had liability been found.

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F. v. Sigma Lithium Corporation

2026 ONSC 2596 (CanLII) · 2026-05-01

Constructive Dismissal: Damages for Unilateral Modifications

This case addresses whether unilateral modifications to duties and marginalization amounted to constructive dismissal, applying the Bardol factors to determine reasonable notice. The court found constructive dismissal established and awarded damages in lieu of notice, along with aggravated and punitive damages due to the employer's egregious conduct.

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S. v. Rotalec Canada Inc.

2026 ONSC 2310 (CanLII) · 2026-04-20

Employment: Leave to Amend Pleadings for Corporate Veil

This is a procedural ruling on a motion to amend pleadings in an employment law action involving constructive dismissal and unpaid commissions. The court granted leave to add corporate veil allegations against a directing mind, finding that a reasonable cause of action was disclosed and leaving limitations defences to be pleaded.

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S. v. University Health Network

2026 ONSC 1208 (CanLII) · 2026-03-10

This is an interlocutory procedural decision regarding a motion to amend pleadings in an employment dispute involving constructive dismissal and Human Rights Code allegations. The court applied the mandatory test under r. 26.01 of the Rules of Civil Procedure, permitting amendments that particularized the constructive dismissal claim while refusing those parts deemed statute-barred under the Limitations Act, 2002. The court allowed additional heads of damages (aggravated and punitive) as they were based on the same facts rather than new causes of action.

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N.M. v. C.T.

2026 ONSC 365 (CanLII) · 2026-01-19

Constructive Dismissal: Part-Time Server Awarded 3 Months Notice

This is a merits decision addressing a claim of constructive dismissal involving a part-time server. The court found the employer's conduct made continued employment untenable and awarded three months' notice plus prejudgment interest.

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M. v. 1788795 Ontario Inc.

2025 ONSC 7245 (CanLII) · 2025-12-29

Constructive Dismissal Appeal: Toxic Work Environment & Human Rights

The Divisional Court dismissed an appeal from a Small Claims Court decision finding that the employer constructively dismissed the employee through a toxic work environment, including inappropriate conduct during medical leave. The court upheld the finding that the employee did not resign or abandon employment, and affirmed the damages awarded for injury to dignity under the Ontario Human Rights Code, applying the standard of review for factual findings.

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K. v. Kingston Area Taxi Licensing Commission

2025 ONSC 4706 (CanLII) · 2025-08-14

Constructive Dismissal: 24 Months Notice & Aggravated Damages

This is a merits decision in a wrongful dismissal case where the plaintiff alleged constructive dismissal due to a hostile work environment, including micromanagement, harassment, and bad faith contract negotiations. The court found that the defendant's conduct fundamentally breached the employment relationship, establishing constructive dismissal and awarding damages for the manner of dismissal.

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M. v. King Ursa Inc.

2025 ONSC 3553 (CanLII) · 2025-06-18

Constructive Dismissal: 12 Months Notice Awarded

This case addresses whether a demotion and significant salary reduction upon an employee's return from maternity leave constituted constructive dismissal. The court applied the principles from Farber v. Royal Trust Co. to find that the unilateral changes to the employee's title and pay independently amounted to constructive dismissal. The court awarded damages based on twelve months' reasonable notice, applying the contextual approach from Bardal v. Globe & Mail Ltd., and also awarded moral damages for the employer's insensitive conduct.

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T. v. Salytics Inc.

2025 ONSC 3461 (CanLII) · 2025-06-10

T. v. Salytics: Constructive Dismissal & Lay-Off Validity

This case involves a dispute over whether a temporary lay-off constituted constructive dismissal and whether the lay-off provision in the employment contract was valid under the Employment Standards Act, 2000. The court analyzed whether the provision qualified as a termination provision and determined that the substance of the provision governed its characterization. The application was dismissed, finding the lay-off provision valid and the temporary lay-off did not amount to constructive dismissal.

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R.T. v. Grenville Management Inc.

2025 ONSC 3087 (CanLII) · 2025-05-28

Constructive Dismissal: 16 Months Notice Awarded

This case addresses whether a unilateral layoff constituted constructive dismissal at common law and whether Ontario Regulation 2020/228 precluded such claims during the pandemic. The court held that the regulation did not displace common law rights and awarded 16 months' notice, considering the pandemic's impact on the job market. The employer's mitigation defence was rejected due to the employee's health issues and belief in the layoff's validity, but punitive damages were denied.

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F. v Susur Lee Group

2025 CanLII 154498 (ON SCSM) · 2025-05-13

Constructive Dismissal: Temporary Lay-off and Condonation

This case addresses whether a unilateral temporary lay-off without a contractual term amounted to constructive dismissal and whether the employee condoned the lay-off by returning to work. The court applied the Potter and Pham framework, finding that the employee's recall within 12 weeks and acceptance of pay constituted condonation rather than mitigation, leading to the dismissal of the constructive dismissal claim.

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2252230 v. R.

2025 ONSC 2649 (CanLII) · 2025-05-13

Constructive Dismissal: 15-Year Bookkeeper Awarded 18 Months Notice

This is a merits decision in a wrongful dismissal case involving a bookkeeper employed for over 15 years who was subjected to unilateral reductions in hours and compensation. The court found these changes constituted constructive dismissal and applied the Bardal factors to determine a reasonable notice period of 18 months. The employer's claim of financial hardship was rejected due to lack of evidence, and damages were calculated based on salary, car allowance, and benefits.

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L. v. St. Laurent Automotive Group Inc.

2025 ONSC 1956 (CanLII) · 2025-03-31

Constructive Dismissal: Temporary Layoff & 7 Months Notice

This case addresses whether a temporary layoff without contractual authorization constitutes constructive dismissal, resulting in a finding that the employer breached essential terms of the employment contract. The court awarded seven months' notice to a mechanic, considering factors such as inducement and economic uncertainty, while rejecting claims for bad faith damages due to a lack of malicious conduct.

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A. v. Costco Wholesale Canada Ltd. et al

2025 ONSC 1769 (CanLII) · 2025-03-19

A. v. Costco: Trial Adjournment & WSIA Right to Sue

This is an interlocutory proceeding concerning a motion for the adjournment of a trial in an employment dispute involving constructive dismissal and harassment. The defendants sought an indefinite adjournment to await a Workplace Safety and Insurance Appeals Tribunal (WSIAT) decision on a right to sue application, while the plaintiff opposed the delay due to prejudice. The court had to determine whether the trial should proceed despite the pending statutory determination.

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B. v. Weirfoulds LLP

2025 ONCA 152 (CanLII) · 2025-02-26

Constructive Dismissal Pleadings Struck Out: B. v. Weirfoulds

This is an appeal to the Court of Appeal from a motion judge's decision striking out an employee's amended statement of claim against several individual defendants. The employee sued his former law firm employer and individual defendants for constructive dismissal, defamation, conspiracy, and other claims. The motion judge struck the claims against the individuals for failing to disclose viable causes of action or lacking material facts, and denied leave to amend the claims against them. The Court of Appeal dismissed the appeal, agreeing that the pleadings lacked necessary material facts and confirming that no standalone causes of action exist for breaches of professional rules or human rights legislation.

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B. v. Callidus Capital Corporation

2025 ONCA 79 (CanLII) · 2025-02-04

Appeal Dismissed: $1.8M Unpaid Benefits Award Upheld

An executive sued for constructive dismissal and unpaid benefits. A motion judge found he voluntarily retired rather than being constructively dismissed, but awarded him approximately $1.8 million for vacation pay, deferred bonuses, and stock options on summary judgment. The Court of Appeal dismissed the employer's appeal, rejecting its just cause defence and upholding the motion judge's decision.

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P. v. Sharon Veterinary Clinic Professional Corporation

2025 ONSC 622 (CanLII) · 2025-01-29

Constructive Dismissal: Veterinarian Resignation Claim

This case involved a veterinarian with 20 years of service who claimed constructive dismissal after his employer refused to send a termination letter to a client. The court determined that the employee's refusal to return to work constituted a resignation rather than a constructive dismissal, leading to the dismissal of his wrongful dismissal and Human Rights Code claims.

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