Non-Disclosure Agreements (NDAs) in Ontario: Complete Guide

A non-disclosure agreement (NDA), also called a confidentiality agreement, is a legally binding contract that requires parties to keep certain information private and confidential. It prevents employees, contractors, or business partners from sharing or misusing sensitive information.

In simple terms: An NDA is a legal promise not to share secrets or confidential information with others.

Other Names for NDAs

Non-disclosure agreements go by several names, all meaning essentially the same thing:

  • Confidentiality Agreement
  • Non-Disclosure and Confidentiality Agreement
  • NDA Contract
  • Secrecy Agreement
  • Proprietary Information Agreement

While “NDA” and “confidentiality agreement” are often used interchangeably, there’s a subtle difference: confidentiality agreements typically protect all parties’ information, while NDAs often focus on one party disclosing information to another.

What Does an NDA Cover?

NDAs protect various types of confidential information, including:

Business Information:

  • Trade secrets and proprietary processes
  • Business strategies and plans
  • Financial information and projections
  • Marketing plans and customer data

Technical Information:

  • Proprietary technology and software
  • Product designs and specifications
  • Research and development data
  • Manufacturing processes

Client Information:

  • Customer lists and contact information
  • Client contracts and pricing
  • Business relationships

Employment Information:

  • Salary information
  • Internal policies and procedures
  • Employee performance data

Types of NDAs

1. Unilateral NDA (One-Way NDA)

The most common type where only one party shares confidential information.

When used:

  • Employer-employee relationships
  • Hiring contractors or consultants
  • Pitching to investors
  • Sharing information with vendors

Example: You hire a marketing agency and share your customer database. The agency signs an NDA promising not to share or use that information.

2. Mutual NDA (Two-Way NDA)

Both parties share confidential information with each other.

When used:

  • Business partnerships
  • Joint ventures
  • Mergers and acquisitions
  • Collaborative projects

Example: Two companies exploring a partnership share financial information and business strategies with each other. Both sign an NDA protecting both parties’ information.

3. Multilateral NDA (Multi-Party NDA)

Three or more parties are involved, and at least one party shares confidential information.

When used:

  • Complex business deals
  • Consortium agreements
  • Multiple stakeholders in a project

Are NDAs Enforceable in Ontario?

Yes, NDAs are legally binding in Ontario if they’re properly drafted and meet certain requirements.

Requirements for Enforceable NDAs:

1. Clarity The NDA must clearly define what information is confidential and what obligations the parties have.

2. Reasonableness The terms must be reasonable in scope, duration, and geographic area. Overly broad NDAs may be unenforceable.

3. Consideration There must be something of value exchanged. For employees, this is usually their job or continued employment.

4. Lawful Purpose The NDA cannot be used to prevent lawful activities like whistleblowing, reporting crimes, or filing human rights complaints.

5. Proper Signing All parties must sign the agreement voluntarily with full understanding of the terms.

What Makes an NDA Unenforceable?

Ontario courts may refuse to enforce NDAs that:

  • Are too vague or overly broad
  • Attempt to cover publicly available information
  • Lack proper consideration
  • Restrict lawful disclosures (reporting crimes, harassment, discrimination)
  • Violate public policy

NDA Disclosure vs. Non-Disclosure

Understanding the difference between disclosure and non-disclosure is key:

Disclosure: Sharing or revealing confidential information (what you agree NOT to do)

Non-Disclosure: Keeping information private and confidential (what you agree TO do)

An NDA creates a legal obligation of non-disclosure—meaning you must keep the information secret.

Your Rights When Asked to Sign an NDA

As an Employee

You Have the Right To:

  • Read and understand the NDA before signing
  • Ask questions about what it covers
  • Request reasonable modifications
  • Seek independent legal advice
  • Refuse to sign (though this may affect your employment)

What to Review:

  • What specific information is considered confidential
  • How long the NDA lasts
  • What you can and cannot disclose
  • Consequences of breach
  • Whether it prevents you from working in your industry after leaving

What NDAs CANNOT Do

NDAs have important limitations under Ontario law:

NDAs Cannot Stop You From:

Any NDA provisions attempting to prevent these activities are likely unenforceable.

NDAs in Settlement Agreements

When workplace disputes are settled, NDAs often appear in the settlement agreement (minutes of settlement):

Typical Terms:

  • Both parties keep settlement terms confidential
  • Employee agrees not to make negative statements about employer
  • Employer may agree to provide positive or neutral reference
  • Details of the dispute remain private

Benefits for Employees:

  • Privacy protection (your identity stays private)
  • Avoid lengthy, expensive litigation
  • Control over your narrative
  • Faster resolution

Benefits for Employers:

  • Protect company reputation
  • Prevent disclosure of sensitive information
  • Avoid public scrutiny
  • Limit liability

Should You Sign an NDA?

Questions to Ask Before Signing:

1. Is it reasonable?

  • Does it clearly define confidential information?
  • Is the duration appropriate?
  • Are the restrictions fair?

2. What am I giving up?

  • Can I work for competitors?
  • Can I use general skills and knowledge?
  • Can I discuss industry trends?

3. What are the consequences?

  • What happens if I accidentally disclose something?
  • Are damages specified?
  • Is there a dispute resolution process?

4. Do I need a lawyer?

  • If you’re unsure, get independent legal advice
  • This is especially important for settlement NDAs
  • Employment lawyers can review and explain your obligations

Tips for Employers: Creating Enforceable NDAs

If you’re an employer drafting an NDA:

1. Be Specific Clearly define what constitutes confidential information. Avoid vague or overly broad language.

2. Make It Reasonable Ensure the scope, duration, and restrictions are appropriate for your business needs.

3. Include Exceptions Permit disclosure for legal obligations, court orders, and reporting misconduct.

4. Provide Consideration Ensure there’s value exchanged (employment, payment, access to information).

5. Get Legal Review Have an employment lawyer review your NDA to ensure it complies with Ontario law.

Common Drafting Mistakes:

  • Failing to define “confidential information”
  • Overly broad or indefinite obligations
  • No exceptions for legally required disclosures
  • Attempting to cover public information
  • Using outdated or generic templates

Bottom Line: Key Takeaways

1. NDAs Are Common and Legal Non-disclosure agreements are standard business practice in Ontario and are enforceable when properly drafted.

2. Understand Before You Sign Read carefully, ask questions, and seek legal advice if unsure. Once signed, you’re legally bound.

3. NDAs Have Limits They cannot prevent you from reporting crimes, harassment, discrimination, or illegal activities.

4. Breaches Have Consequences Violating an NDA can result in lawsuits, financial damages, and injunctions.

5. Duration Matters Check how long the NDA lasts—some are indefinite for trade secrets, others expire after a set period.

6. Settlement NDAs Are Different NDAs in settlement agreements protect both parties and often come with benefits like severance pay.

7. Get Legal Advice If you’re asked to sign an NDA—especially in a settlement—consult an employment lawyer to understand your rights and obligations.

8. Employers: Draft Carefully Poorly written NDAs may be unenforceable. Work with a lawyer to create clear, reasonable agreements that comply with Ontario law.

Need Help with an NDA? Whether you’ve been asked to sign one, need to draft one for your business, or believe someone has breached an NDA, contact an employment lawyer for guidance. Most offer free consultations and can protect your rights and interests.

Saad Mirza

About the Author

Saad Mirza

Hi! beautiful people. I’m an employment lawyer. I help workers across Ontario stand up for their rights. Hope this blog helped—stick around for more.

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