Trade Secrets — Ontario Employment Law
Related Keywords
About Trade Secrets
When you leave a job, you take your acquired skills, professional experience, and general industry knowledge with you. However, Ontario employment law draws a strict line when it comes to "trade secrets." A trade secret is the highest tier of proprietary information. Unlike general company knowledge, a trade secret is a specific piece of information—like a unique manufacturing process, proprietary software source code, a closely guarded algorithm, or an exclusive chemical formula—that gives a business a competitive edge precisely because it is kept secret.
In Ontario, the law recognizes that employers invest significant resources into developing these assets. Consequently, trade secrets are protected both by employment contracts and under common law principles. Even if you never signed a formal confidentiality agreement, you have an implied legal duty of good faith not to misappropriate or misuse your former employer’s trade secrets for your own benefit or a competitor's gain.
Courts take the theft or misuse of trade secrets very seriously. When employers discover that a departing worker has transferred proprietary databases or custom tooling designs, they frequently seek an "interlocutory injunction." This is an emergency court order designed to immediately stop the former employee from working for a competitor or using the data, preventing what courts refer to as "irreparable harm" to the original employer's business. In older cases, penalties have been severe, including massive cost awards against employees who attempted to erase evidence of taking trade secrets.
A common friction point arises when distinguishing between what belongs to the employer and an employee's personal "know-how." You have the right to earn a living and use the general skills you honed at your previous job. But you cannot replicate a secret process you were explicitly hired to oversee. Because the line between general industry knowledge and a protected trade secret is highly subjective and depends entirely on the unique facts of your role and industry, having a qualified legal professional assess your specific situation is the safest way to transition to a new job without triggering a lawsuit.
Ultimately, trade secret protection does not expire. Unlike restrictive covenants such as non-competition clauses that typically last for a few months, trade secrets must be kept confidential indefinitely, as long as they remain secret and valuable.
Frequently Asked Questions
What is the difference between my general skills and a trade secret?
General skills involve your ability to do a task, your industry experience, and your professional network, which you are free to use anywhere. A trade secret is specific, highly confidential property owned by your employer—such as a custom software algorithm or a specialized manufacturing formula—that is not known to the public and gives the company a distinct economic advantage.
Can I be sued if I memorized a trade secret instead of downloading it?
Yes. Ontario courts have ruled that misappropriating trade secrets through memorization is still a breach of confidence. Whether you print a proprietary customer database, copy a manufacturing process to a USB, or commit it entirely to memory to use at a competitor, the legal consequences are the same.
Do trade secrets require a signed confidentiality agreement to be protected?
No. While most employers use strict employment contracts to explicitly outline these restrictions, Ontario common law imposes an implied duty of good faith on all employees. You cannot steal or exploit your employer's trade secrets even if you never signed a piece of paper.
How long do I have to keep a trade secret confidential after quitting?
Unlike non-solicitation or non-competition clauses which have specific end dates (e.g., 12 months after resignation), the obligation to protect a genuine trade secret never expires. You must maintain its confidentiality for as long as the information remains a secret in the industry.
What is an interim injunction in a trade secret dispute?
An interim or interlocutory injunction is an emergency court order that an employer can request if they believe you stole proprietary information. If granted, the court can immediately prohibit you from using the information, and sometimes even from working at your new job, until a full trial takes place.
At what point should I consult an employment lawyer about proprietary information?
You should seek legal counsel immediately if your new employer asks you to bring "templates" or "processes" from your old job, if you are planning to start a competing business using systems you learned at work, or if you receive a cease-and-desist letter accusing you of taking protected information.
Common Scenarios
- A senior software engineer resigns to start a competing tech company, taking lines of highly proprietary source code that generates millions in revenue for the former employer, prompting an immediate lawsuit and injunction.
- A plant manager memorizes a closely guarded, custom tooling process unique to their employer's manufacturing plant, then attempts to implement that exact same secret process at a rival facility.
- A data analyst transfers their employer's custom-built, proprietary "Diagnosis Database" to a personal cloud drive three days before giving notice, violating their duty of confidence and triggering an emergency court intervention.
- A salesperson with access to a highly confidential, heavily protected client pricing algorithm leaves for a competitor, and the competitor pressures them to run the algorithm to undercut the former employer's bids.
What You Should Know
- Never transfer company files, code, or proprietary data to your personal email, USB drives, or cloud storage before leaving a job, even if your intention is just to keep an example of your own work.
- Before starting a new job, ask an employment lawyer to review your previous contract to ensure there is no reasonable confusion between your transferable skills and what your old employer might claim as a trade secret.
- Politely decline requests from prospective employers to bring over your past company's templates, client lists, or specialized processes, as this exposes both you and the new employer to serious legal liability.
- Ensure you return all company-issued devices (laptops, phones, tablets) completely intact, and do not attempt to delete files to cover your tracks, as courts look very harshly on the destruction of digital evidence.
Featured Cases
Aon Benfield Canada ULC v. Vazir
2018 ONSC 4529 (CanLII) · 2018-08-08Costs Award: Former Employee Misappropriation Case
This is a costs ruling in an action involving a former employee who misappropriated proprietary software and confidential information. The court determined fair and reasonable costs under Rule 57.01, considering the defendant's misconduct, including the misappropriation of assets valued at $15 million in annual revenue and attempts to erase evidence.
Shaver-Kudell Manufacturing Inc. v. Knight Manufacturing Inc., et al
2018 ONSC 5206 (CanLII) · 2018-08-07Former Employee Misappropriation of Trade Secrets
This case addresses whether a former employee breached her duty of confidence and good faith by misappropriating trade secrets and customer lists. The court found that the manufacturing processes and tooling constituted trade secrets and that the defendant's use of memorized customer information for a competitor established a breach of confidence.
Claim Analytics v Polon et al.
2016 ONSC 2235 (CanLII) · 2016-04-08Former Employee Trade Secret Injunction
This is an interlocutory proceeding where the plaintiff sought an interim injunction to restrain former employees from using or disclosing confidential information and trade secrets. The court addressed whether the plaintiff's Diagnosis Database constituted confidential information and applied the test for injunctive relief, including serious issue to be tried, irreparable harm, and balance of convenience.
698871 Ontario Inc v Menard & Associates Inc
2012 ONSC 6166 (CanLII) · 2012-11-01Non-Competition Agreement & Trade Secrets Dispute
An employment law dispute concerning the enforceability of a non-competition agreement and the protection of trade secrets.
J-Tech Design Ltd. v. Bosnjak
2009 CanLII 9469 (ON SC) · 2009-03-05Interlocutory Injunction: Breach of Confidentiality by Employee
This is an interlocutory proceeding where the plaintiff sought an interim injunction to prevent former employees or contractors from using or disclosing confidential information. The court applied the R.J.R. MacDonald test, finding that the breach of confidentiality agreements caused irreparable harm to goodwill and that the balance of convenience favored granting the injunction to preserve the status quo.
Bee Chemical Co. v. Plastic Paint & Finish Specialities Ltd. et al.
1978 CanLII 4103 (ON SC) · 1978-03-02Trade Secrets and Master-Servant Obligations
A legal dispute concerning trade secrets and the obligations arising from a master and servant (employer-employee) relationship.
International Tools Ltd. v. Kollar et al.
1966 CanLII 161 (ON SC) · 1966-02-11Former Employees Trade Secrets & Confidentiality Injunction
This is a civil proceeding involving former employees who left their employer to establish a competing business, alleging misuse of trade secrets and breaches of confidentiality. The court examined whether the manufacturing process for reflex pins constituted confidential information and whether implied duties of good faith and confidentiality applied to the former employees. The court granted a permanent injunction to protect the confidential processes and ordered an accounting of profits, finding that the defendants' conduct breached their obligations.
Reliable Toy Co. Ltd. and Reliable Plastics Co. Ltd. v. Collins
1950 CanLII 320 (ON SC) · 1950-04-03Breach of Confidentiality: Trade Secrets in Employment
This is an interlocutory or merits proceeding involving claims for an injunction and damages for breach of confidentiality and misuse of trade secrets. The court examined the duty of confidentiality arising from the employment relationship and the admissibility of wire recordings as evidence of the disclosure.
R.I. Crain Limited v. Ashton and Ashton Press Manufacturing Company Limited
1949 CanLII 111 (ON SC) · 1949-03-21Former Employees: Trade Secrets & Confidentiality
This case addresses the legal obligations of former employees regarding trade secrets and confidential information acquired during their employment. The court examined whether disclosure through product sales extinguished the confidential nature of the trade secrets and clarified the distinction between protectable trade secrets and general skills or knowledge gained during employment.