Unilateral Changes — Ontario Employment Law
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About Unilateral Changes
In Ontario, your employment relationship is a form of contract, whether it's a detailed written document or a verbal agreement supplemented by company policies. A 'unilateral change' occurs when your employer alters a fundamental term of this contract without your consent. This is a critical concept in employment law because, unlike other commercial contracts, an employer cannot simply decide to change the rules midway through the game.
Not all changes are legally significant. Employers generally have the right to make minor administrative adjustments or changes that are within the reasonable scope of the original agreement. The issue arises when the change is substantial and negatively impacts a core aspect of your job. Common examples include a significant reduction in pay or commission, a demotion in status or responsibility, a forced relocation to a different city, or a drastic change in work hours. These are considered fundamental terms of the employment contract.
Under Ontario's common law, an employer who wishes to make a substantial change to an employee's contract must typically offer fresh 'consideration'—a new benefit, such as a signing bonus or a raise—in exchange for the employee's agreement to the new, less favourable terms. Simply threatening termination if the employee doesn't sign is not legally sufficient and can render the new contract unenforceable, as seen in several Ontario court cases.
If your employer imposes a significant unilateral change, you generally have three options. You can accept the change, either explicitly or by continuing to work under the new conditions without complaint. You can reject the change but continue to work 'under protest,' making it clear you do not agree to the new terms. Or, if the change is fundamental enough, you can treat it as a 'constructive dismissal,' resign, and pursue damages equivalent to what you would have received in a wrongful dismissal. Each path carries significant legal implications, and understanding which one is appropriate for your specific circumstances often requires careful legal analysis.
Frequently Asked Questions
What kind of job changes are considered 'unilateral changes' in Ontario?
A unilateral change is a significant alteration to a fundamental term of your employment without your agreement. This can include major pay cuts, demotions, significant changes to job duties or authority, or a forced relocation. Minor administrative changes are typically not considered legally significant.
My boss cut my salary by 15%. What should I do?
A 15% pay cut is almost always considered a fundamental change. You should not ignore this. You need to decide whether to accept it, reject it and work under protest, or treat it as a constructive dismissal. It is crucial to document your objection in writing immediately to prevent being seen as having accepted the change.
Can my employer change my job title or duties?
It depends. If the change is a minor adjustment to your duties or a title change that doesn't affect your status or pay, it may be permissible. However, if it's a demotion or a change that fundamentally alters the nature of your work and responsibilities, it could be a breach of your employment contract.
My employer wants me to sign a new contract with worse terms. Do I have to?
No, you are not obligated to sign a new contract that worsens your terms. For a new contract to be valid, your employer must provide 'fresh consideration'—something new of value, like a bonus or raise. Simply continuing your employment is not considered valid consideration.
How long do I have to object to a change in my employment terms?
There is no exact deadline, but you must object in a timely manner. If you continue to work for weeks or months under the new terms without saying anything, a court may decide that you have implicitly accepted the change. You should state your objection in writing as soon as possible.
Is it better to quit or work 'under protest' if my job is changed?
Quitting is a very high-risk step that should only be taken after receiving legal advice, as it means you are claiming constructive dismissal. Working 'under protest' while you seek advice is often a safer initial step, as it preserves your rights while you continue to earn an income and explore your options.
When should I talk to a lawyer about a change to my job?
You should consult an employment lawyer as soon as your employer proposes or imposes a change that negatively affects a core part of your job, such as your pay, status, location, or core responsibilities. Getting advice before you accept, reject, or resign is critical to protecting your legal rights.
Common Scenarios
- A company is sold and the new owner requires all staff to sign new employment agreements that eliminate their prior years of service for severance calculation purposes.
- A senior manager is told her team is being reassigned and she will now be in a non-managerial 'individual contributor' role, despite her pay remaining the same.
- A long-haul truck driver who was promised routes within Southern Ontario is suddenly reassigned to cross-border routes requiring him to be away from home for weeks at a time.
- A marketing coordinator has her hours reduced from 40 per week to 20 per week due to budget cuts, effectively halving her income.
- A salesperson is informed via email that their commission structure is changing from a flat percentage to a tiered system that will likely result in lower overall earnings.
What You Should Know
- If your employer imposes a significant negative change, immediately state your objection clearly and in writing (e.g., via email) to create a record that you have not accepted the new terms.
- Do not sign any new contract or addendum that worsens your terms without first understanding the legal consequences and what 'fresh consideration' you are being offered in return.
- Keep copies of your original employment contract, job description, pay stubs, and any written communication from your employer regarding the proposed changes.
- Understand that continuing to work under changed conditions for a prolonged period without protest can be interpreted by law as your acceptance of those new terms.
- Before resigning in response to a unilateral change, seek advice from an Ontario employment lawyer to assess whether the change is significant enough to legally qualify as a constructive dismissal.
Featured Cases
Tar Heel Investments Inc. v. H.L. Staebler Company Limited et al
2025 ONSC 240 (CanLII) · 2025-01-10Constructive Dismissal Case: Arseneau Not Constructively Dismissed
A constructive dismissal case where the court determined that the defendant Arseneau was not constructively dismissed despite substantial changes to his employment terms. The case also addressed issues of fiduciary duties, confidentiality, and unlawful conduct.
Kerner v. Information Builders (Canada) Inc.
2020 ONSC 2975 (CanLII) · 2020-07-16Wrongful Dismissal: Plaintiff Awarded 8 Months' Notice and Damages
A wrongful dismissal case where the plaintiff was terminated without proper notice. The court determined the plaintiff was entitled to eight months' reasonable notice under common law, applying Bardal factors. The plaintiff was awarded damages for base salary, benefits, and commissions during the notice period. The court also addressed the impact of the 2017 and 2018 Sales Plans on commission entitlement and the enforceability of unilateral changes to employment contracts.
McLean v Dynacast Ltd.
2019 ONSC 7146 (CanLII) · 2019-12-17Constructive Dismissal: Unilateral Changes and Aggravated Damages Awarded
A constructive dismissal case where the plaintiff was reassigned to a lower-status position with significant changes to duties, work environment, and compensation. The court applied the Potter test and awarded 28 months' notice, $25,000 in aggravated damages, and considered income from part-time work for mitigation earnings.
Lin v OTPPB
2015 ONSC 3494 (CanLII) · 2015-06-01Senior Investment Professional: Termination, Notice Period, and Incentive Compensation
A senior investment professional was terminated without cause after eight years of service. The court found no legal cause for termination and applied the McKinley v. BC Tel framework to determine a 15-month notice period. The employee was entitled to incentive compensation during the notice period, and the employer's unilateral amendments to the employment contract were deemed ineffective. Aggravated damages were not awarded due to the extended notice period adequately compensating the employee.
Morgan v. Vitran
2013 ONSC 6835 (CanLII) · 2013-11-05Constructive Dismissal: Dock Supervisor Reassigned to Freight Analyst Role
A constructive dismissal case involving a dock supervisor reassigned to a freight analyst role, which was deemed a substantial alteration of essential employment terms. The court determined the appropriate notice period and awarded moral damages based on the employer's conduct during dismissal.
Russo v. Kerr
2010 ONSC 6053 (CanLII) · 2010-11-02Constructive Dismissal: Unilateral Changes and Mitigation of Damages
A constructive dismissal case where the court ruled that unilateral changes to employment terms, including salary reduction and altered pension plan, constituted constructive dismissal. The employee was entitled to sue for damages, and the court awarded 22 months' notice, applying Bardal factors. The court also granted partial summary judgment for damages accrued to the motion date.
Allstate Insurance Company of Canada v. Laroque
2008 CanLII 3959 (ON SC) · 2008-02-06Constructive Dismissal: Enforceability of Restrictive Covenants in Employment Contract
A constructive dismissal case where the defendant alleged that unilateral changes to their employment terms under the New Model constituted a repudiation of the employment contract. The plaintiff sought to enforce restrictive covenants in a 1986 employment contract, but the enforceability of those covenants was questioned if constructive dismissal was established.
Corey v. Dell Chemists (1975) Ltd.
2006 CanLII 19435 (ON SC) · 2006-04-26Constructive Dismissal: 20-Year Employee Awarded 15-Month Notice Period
A constructive dismissal case where the employer unilaterally changed the employee's hours, workdays, and employment status from full-time to part-time without consent. The court applied the Farber v. Royal Trust Co. test and awarded a 15-month notice period, with damages for loss of income totaling $14,355 plus prejudgment interest.
BMO Nesbitt Burns Inc. v. Bond
2002 CanLII 3184 (ON SC) · 2002-09-30Constructive Dismissal: Unilateral Changes Not Found to Be Fundamental
A constructive dismissal case where defendants alleged that unilateral changes to their account transfers and commission structure by the employer constituted a fundamental change to their employment. The court found that the changes were within the employer's contractual rights and did not amount to constructive dismissal. The counterclaim for constructive dismissal and return of monies was dismissed as the promissory note was deemed valid and enforceable.
Simpson v. Consumers' Assn. of Canada
1999 CanLII 14880 (ON SC) · 1999-03-12Constructive Dismissal: Unilateral Changes to Employment Terms
A constructive dismissal case where the plaintiff alleged the employer unilaterally reduced salary, vacation, and sick leave benefits, fundamentally altering the terms of employment. The case also involves a termination for cause claim based on allegations of sexual harassment and oppressive conduct, as well as a bad faith dismissal claim seeking extended notice under Wallace v. United Grain Growers Ltd.
Schumacher v. Toronto Dominion Bank
1997 CanLII 12329 (ON SC) · 1997-05-15Constructive Dismissal: Senior Executive Awarded 13-Month Notice Damages
A constructive dismissal case involving a senior executive whose responsibilities were unilaterally reduced following the hiring of another executive. The court found that the changes constituted a fundamental breach of the employment contract, establishing constructive dismissal. The employee was awarded damages for a 13-month notice period, including salary, bonus, stock options, and benefits.
Pulak v. Algoma Publishers Ltd.
1995 CanLII 7277 (ON SC) · 1995-03-08Constructive Dismissal: Unilateral Wage Reduction Found Unreasonable
A constructive dismissal case where the employer unilaterally imposed a 10% wage reduction or reduced hours, and the court found these changes to be unreasonable. The case also addresses the reasonable notice period for a plaintiff with 29 years of service and the duty to mitigate damages by accepting reasonable offers of continued employment.