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Find a Lawyer » Canada Legal Guides » Ontario Legal Guides » Work & Employment Rights Ontario » Inventions Assigned to Employer: Navigating IP Clauses in Ontario

Inventions Assigned to Employer: Navigating IP Clauses in Ontario

7 Jun 2026 5 min read No comments Work & Employment Rights Ontario
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In Ontario, many employment contracts include an Intellectual Property (IP) assignment clause. This means any inventions, software, or patents you create during your employment generally belong to the company, not you. If you have personal side projects, you must negotiate written exceptions before signing your contract.

The technology sectors in cities like Toronto, Waterloo, and Ottawa are booming with innovation. Every day, brilliant software engineers, product designers, and researchers develop valuable new tools and applications. However, many of these creators are shocked to discover that their employer legally owns the rights to their brilliant ideas, even if the concept was brainstormed during a weekend coffee run.

This loss of ownership is usually due to an Intellectual Property (IP) assignment clause buried in the standard employment agreement. 💵 Ontario law generally upholds these contracts, meaning the company can patent your invention, sell it for millions, and owe you nothing beyond your regular salary. This comprehensive guide will explain how these clauses work, how to protect your personal side hustles, and what steps you can take to negotiate fair terms.

Step-by-Step Guide to Navigating IP Clauses in Ontario

Protecting your personal inventions requires proactive steps before you officially accept a job offer. Follow this process to ensure your employer does not lay claim to the ideas you build on your own time.

Step 1: Scrutinize the Employment Contract

Never sign an employment offer without reading the “Intellectual Property” or “Inventions” section. 🔍 These clauses are typically drafted broadly, stating that anything you conceive, develop, or reduce to practice “during the term of your employment” belongs to the company. Pay close attention to whether the clause limits the company’s ownership to inventions related to their specific business, or if it claims absolutely everything you make.

Step 2: Declare Your Prior Inventions

If you have been working on a personal app or a physical prototype before accepting the new job, you must protect it. Ask Human Resources to attach a “Schedule A” or an “Exclusions List” to your contract. Clearly document the name and nature of your existing side project, and have the employer sign off that they have no legal claim to this specific prior invention.

Step 3: Never Use Company Equipment for Personal Projects

Even if you negotiate a fair contract, using your employer’s resources will destroy your legal defence. 🗂 Never use your company-issued laptop, corporate software licenses, internal servers, or the office 3D printer to build your personal project. Keep your side hustle completely isolated on your personal hardware, and only work on it outside of your regular working hours.

Step 4: Understand the Waiver of Moral Rights

In addition to owning the patent or copyright, employers will ask you to waive your “moral rights.” Under Canadian copyright law, moral rights protect your ability to be credited as the author and prevent the work from being modified in a way that harms your reputation. Waiving these rights means the company can alter your code or design and publish it without ever attaching your name to it.

Step 5: Consult an Employment Lawyer

If you are a high-level developer joining a tech firm, the standard contract might be too aggressive. Have an employment lawyer in Ontario review the agreement. They can help you negotiate a “carve-out” clause that explicitly protects your personal, unrelated weekend projects from the company’s grasp.

How Much Does it Cost in Ontario?

Failing to understand your employment contract can cost you the future profits of your own invention. 💰 Here is a look at the financial aspects of IP clauses.

  • Contract Review: Hiring an employment law firm to review your contract and negotiate IP carve-outs typically costs between $300 and $600 CAD per hour.
  • Patent Filing: If you successfully retain your rights and want to patent your invention through the Canadian Intellectual Property Office (CIPO), filing and lawyer fees often range from $5,000 to $10,000 CAD.
  • Civil Damages: If you steal code that legally belongs to your employer and use it in your own startup, the company can sue you in the Superior Court of Justice for massive financial damages and lost profits.

Comparing Broad vs. Narrow IP Clauses

Clause TypeWhat the Employer ClaimsRisk to Your Side Hustle
Extremely Broad ClauseAnything created during the employment periodVery High (They may claim unrelated weekend apps)
Narrow/Related ClauseInventions related strictly to the company’s industryLow (Unrelated hobbies are usually safe)
Time & Materials ClauseAnything built using company tools, time, or dataModerate (Safe if strictly kept to personal devices)
Moral Rights WaiverThe right to edit and publish without naming youN/A (Applies to work done for the company)

How Long Does the Process Take?

Negotiating the terms of your contract before you sign is usually a quick process, taking roughly 1 to 2 weeks of back-and-forth emails with Human Resources. However, if a dispute arises after you leave the company and they sue you for intellectual property theft, corporate litigation in the Ontario courts can easily drag on for 2 to 4 years before reaching a final verdict.

Frequently Asked Questions (FAQ)

What if I build an app on my own time but in the same industry?

This is highly risky. Even if built on the weekend, if your invention directly relates to your employer’s business or uses knowledge you gained on the job, the courts will likely rule that the IP belongs to your employer under your assignment clause.

Can they force me to sign an IP agreement after I am already hired?

If an employer asks you to sign a new, restrictive IP clause after you have already started working, they must offer you “fresh consideration” (something of value, like a bonus or a raise) to make the new contract legally binding in Ontario.

Do independent contractors automatically assign their IP?

No. In Canada, independent contractors generally retain the copyright and IP of their work unless the service agreement explicitly contains an assignment clause transferring ownership to the client.

What happens if I refuse to sign the IP clause?

If you refuse to sign the employment contract as presented, the employer has the legal right to revoke the job offer. It is always better to negotiate a specific exception rather than flatly refusing the entire document.

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