Continuity of Employment — Ontario Employment Law
Related Keywords
About Continuity of Employment
In Ontario employment law, a worker's length of service is one of the most critical factors in determining their right to severance pay and reasonable notice of termination. "Continuity of employment" refers to the unbroken period of time an individual is legally recognized as having worked for an employer. While this might seem as simple as checking a start date, the law recognizes that modern employment relationships are often complex. Changes in corporate ownership, shifting between affiliated sister companies, transitioning from independent contractor to employee, or moving from full-time to part-time hours can muddy the waters.
Under Section 9 of the Employment Standards Act, 2000 (ESA), your employment service is generally protected if the business you work for is sold (whether through an asset or share sale) and you are hired by the purchaser. The law "bridges" your service, treating your time with the seller and the purchaser as one continuous period for the purposes of calculating termination pay, severance pay, and vacation entitlements. An employer cannot simply declare that your seniority resets to zero just because the company changed hands or underwent corporate restructuring.
Beyond statutory protections, Ontario common law frequently looks at the reality of the working relationship rather than strict corporate formalities. Courts have regularly ruled that service remains continuous when an employee is shifted through successive legal entities by the same broader corporate group. Similarly, courts may recognize continuous service when evaluating wrongful dismissal claims for employees who spent several years as dependent contractors before formally coming onto the payroll, or those who transitioned between part-time and full-time roles without a break in the relationship.
Employers will sometimes ask workers to sign new employment contracts during a restructuring or sale that attempt to limit severance to the ESA minimums based only on a "new" start date. Ontario courts heavily scrutinize these agreements and frequently find them unenforceable if the employee did not receive something of value (fresh consideration) in exchange for waiving their inherited seniority. Because disputes over tenure calculations can drastically alter the value of a severance package, having your specific history evaluated by an employment law professional is essential to ensuring your full period of service is acknowledged.
Frequently Asked Questions
Does my seniority reset to zero if my company is sold?
Generally, no. Under the Ontario Employment Standards Act, if a business is sold and the purchaser continues your employment, your time spent working for the seller is legally joined with your time working for the buyer. Your service is deemed continuous for calculating statutory entitlements.
Does taking an authorized leave of absence break my continuity of employment?
No. Approved leaves of absence, such as maternity leave, parental leave, or statutory medical leave, do not break your legal chain of continuous service. The time spent on these leaves generally counts toward your overall length of employment.
How is my service calculated if I move between different companies owned by the same people?
At common law, courts frequently apply the "common employer" doctrine. If you are moved seamlessly between sister companies or parent-subsidiary corporations, your employment will typically be viewed as one continuous, unbroken period.
What happens to my years of service if I switch from part-time to full-time work?
Transitioning from part-time to full-time (or vice versa) does not break your continuity of employment. When calculating your total years of service upon termination, courts and the Ministry of Labour look at the entire uninterrupted duration of your relationship, though a court may weigh part-time years slightly differently when determining common law reasonable notice.
Is there a deadline to challenge how my employer calculated my years of service?
Yes. If you have been terminated and your employer fails to recognize your continuous service—resulting in an inadequate severance package—you typically have two years from the date of dismissal to pursue a wrongful dismissal claim in court. Statutory claims filed through the Ministry of Labour may have different limitation periods.
When should I consult an employment lawyer about my length of service?
You should seek legal guidance if your company is undergoing a buyout, merger, or reorganization and you are presented with a new contract that alters your recognized start date. It is also crucial to get advice if you are terminated and your employer calculates your severance package using only a fraction of your actual tenure.
Common Scenarios
- A 20-year employee is retained when their company is acquired by a competitor. Two years later, the new owner terminates them without cause and offers a severance package based only on the two years worked under the new ownership, unlawfully ignoring the previous two decades of continuous service.
- A worker spends five years working exclusively for a company under an "independent contractor" agreement. The company then hires them directly as an employee. After three more years, the worker is dismissed, and a dispute arises over whether their common law notice period should reflect three years of service or eight continuous years.
- During an internal corporate restructuring, an employee is formally "terminated" on paper by one numbered company and immediately hired by another numbered company managed by the exact same executive team. Upon their eventual genuine dismissal, the employer argues their service restarted at the internal transfer date.
What You Should Know
- Always preserve historical employment documents, including your original offer letter, early pay stubs, T4s, and any written communications detailing structural changes or corporate transitions during your tenure.
- Be highly skeptical of any "new" employment contract presented during a company acquisition that attempts to redefine your original start date, as this could severely reduce your future entitlements.
- Do not assume a purely administrative change—like a new internal employee ID, a switch to a different payroll provider, or a shift from hourly to salaried status—breaks your legal continuity of employment.
- If your employer is proposing a shift in corporate structure that seems designed to reset the seniority of the workforce, reviewing the situation with a legal advisor before signing any documentation is an excellent preemptive measure.
Featured Cases
M. v. ASCO Manufacturing
2019 ONSC 5572 (CanLII) · 2019-09-26Wrongful Dismissal: 36-Year Welder Awarded 20 Months Notice
This wrongful dismissal case involved a 64-year-old welder with 36 years of service who was terminated without cause by a purchaser of the business. The court determined that his employment constituted a continuation of his service with the seller, entitling him to damages based on that full tenure. The court awarded 20 months' notice, rejecting the defendant's arguments regarding mitigation and prior settlements by the seller.
T.-L. v. 3395022 Canada Inc. (Kutcher Dentistry Professional Corporation)
2019 ONCA 469 (CanLII) · 2019-06-07Rescinded Resignation & Notice Periods
This was an appeal to the Court of Appeal from a trial judge's decision on whether a rescinded resignation broke an employee's continuous service. The employee worked as a dental hygienist starting in 1993, but she resigned in 2005 before quickly rescinding it and signing a new contract. The trial judge found her employment was continuous, the new contract lacked consideration, and awarded 15 months' common law notice. The Court of Appeal allowed the employer's appeal, ruling that the unequivocal resignation ended the employment relationship and provided consideration for the new contract. The employee's entitlement was limited to the statutory minimum of 7.5 weeks of salary.
T.-L. v. 3395022 Canada Inc.
2018 ONSC 3222 (CanLII) · 2018-05-25Wrongful Dismissal: 19-Year Employee Awarded 15 Months Notice
This wrongful dismissal case addressed whether an employee's length of service remained continuous despite restructuring by successive legal entities and whether employment agreements limiting notice to ESA minimums were enforceable. The court found the agreements unenforceable due to lack of fresh consideration and calculated the plaintiff's length of service as 19 years. Consequently, the court awarded 15 months of reasonable notice based on the Bardal factors, including the plaintiff's age of 54 and her reasonable mitigation efforts.
A. v. NORR Limited Architects & Engineers
2018 ONSC 620 (CanLII) · 2018-03-2830-Year Employee Limited to ESA Pay Due to Valid Waiver
This wrongful dismissal case addressed whether an employee's service remained continuous following a business sale and a transition from full-time to part-time work. The court determined that while the employee's service was continuous, he was bound by a valid waiver of common law notice, limiting his damages to ESA termination and severance pay.
K. v. Olympus Canada Inc.
2017 ONCA 873 (CanLII) · 2017-11-16K. v. Olympus: Termination Clause & ESA Continuity
This appeal addresses whether a termination clause in a new employment contract offered by a purchaser of business assets is enforceable, specifically examining if section 9(1) of the Employment Standards Act, 2000 deems employment continuous for all purposes and if the offer of employment constitutes valid consideration. The Court of Appeal for Ontario held that the ESA protects minimum statutory entitlements but does not deem continuity for all purposes, and that the offer of employment constitutes valid consideration for the new contract. The court declined to address alternative arguments regarding the termination clause's validity due to the absence of a cross-appeal and factual findings from the trial.
P.A. v Verona Floors Inc.
2016 ONSC 5763 (CanLII) · 2016-10-12Wrongful Dismissal Appeal: Common Employer Doctrine
An appeal from a trial judge's decision in a wrongful dismissal action concerning whether employment continuity existed between two corporate entities. The Divisional Court reviewed whether the trial judge erred in law by applying the common employer doctrine without sufficient evidence of corporate control or agreement.
F. v. Don Casselman Global Enterprises
2013 ONSC 7032 (CanLII) · 2013-11-13Wrongful Dismissal: Continuous Employment & Inducement
This wrongful dismissal action addressed whether the plaintiff's prior employment with a different entity constituted continuous employment under the Employment Standards Act, 2000, and whether the defendants induced her to leave that previous position. The court denied the plaintiff's motion for summary judgment because there were insufficient evidentiary gaps regarding the length of employment, salary, and damages to allow for a full appreciation of the evidence.
Canada (Attorney-General) v. Standard Trust Co.
1994 CanLII 7516 (ON SC) · 1994-11-13Employment Standards: Continuity of Employment and Termination Pay on Business Sale
A merits decision involving the interpretation of the Employment Standards Act (ESA) regarding the continuity of employment and entitlement to termination and severance pay when a business is sold to a federally regulated entity. The case also examines whether ESA claims are preferred in bankruptcy proceedings under the Winding-up Act.
Ontario (Employment Standards Officer) v. Equitable Management Ltd. (Div. Ct.)
1990 CanLII 6973 (ON SC) · 1990-09-28Employment Standards: Continuity of Employment During Business Sale
A merits decision involving the interpretation of section 13(2) of the Employment Standards Act, which deems employment continuous if the purchaser employs the vendor’s employee. The court overturned a referee’s decision for misinterpreting the provision, applying the standard of correctness in judicial review.
D. v. Bayley MacLean Real Estate Ltd. (Dist. Ct.)
1990 CanLII 6618 (ON SC) · 1990-05-31Wrongful Dismissal: Resident Manager Awarded 5 Months Notice
A wrongful dismissal case involving a plaintiff employed as a resident manager for over five years by successive management companies. The plaintiff was terminated by the last management company without reasonable notice, and the purchaser of the building declined to assume the employment agreement. The court ruled that the management company was liable for damages, while the purchaser was not liable under the Employment Standards Act.
A. v. M. Loeb, Ltd.
1986 CanLII 2474 (ON CA) · 1986-03-12Wrongful Dismissal: 20 Years Service Awarded 12 Months Notice
The Court of Appeal for Ontario heard an appeal regarding the calculation of reasonable notice for a senior employee dismissed without cause after 20 years of service. The court held that continuity of employment with a predecessor employer must be considered when determining the notice period, extending the reasonable notice to 12 months.