Non Disclosure Agreements in Canada: The Complete Guide

Most non disclosure agreements in Canada are templates. They get signed quickly, filed, and never read again until something goes wrong, at which point the question is whether the document actually does anything.

This guide covers what an NDA is worth in Canada, what courts here have said about protecting confidential information, which clauses decide whether an agreement holds up, and the overreach worth pushing back on before you sign.

What is a non disclosure agreement?

A non disclosure agreement, also called a confidentiality agreement, is a contract in which one or both parties promise to keep specified information confidential and to use it only for an agreed purpose. It defines what counts as confidential, how long the obligation lasts, what the recipient may do with the information, and what happens on a breach.

There is no single Canadian statute governing business NDAs. They are ordinary contracts, sitting on top of the common law action for breach of confidence, which can protect information even without a signed agreement.

What an NDA protects, and what it cannot

A useful test before signing anything is whether the information is confidential in substance, whether it will still be identifiable months later, and whether the disclosing party would genuinely fund a lawsuit over it. Plenty of NDAs fail at least one of those.

Ideas are not property. An NDA over an idea stage concept, with nothing documented and nothing distinctive, is closer to a signal of seriousness than a legal protection.

Where an NDA earns its place is different. In due diligence for an acquisition or a financing there is a defined data room with real financials and customer data. In technical disclosures to a manufacturer, licensee or integrator there is a process or specification that can be described precisely.

There is also an evidentiary function that is easy to miss. In Lac Minerals Ltd. v. International Corona Resources Ltd., the Supreme Court of Canada set out the elements of a breach of confidence claim: information with the necessary quality of confidence, communicated in circumstances importing an obligation of confidence, and misused to the detriment of the party who disclosed it. A signed NDA turns the second element from an argument into a document, which is a meaningful part of the fight.

Mutual or one way: how to choose

Follow the actual flow of information. If only one side is disclosing anything sensitive, a one way agreement is the accurate document. Accepting mutuality by reflex has a real cost: your business picks up tracking obligations and breach exposure for information it never wanted, and the other side’s broad definition now runs against you.

Mutual agreements make sense where disclosure genuinely runs both ways, such as joint venture talks, two sided due diligence, or a technology integration. Symmetry also disciplines overreach, since a party writing obligations it will bear itself tends to write reasonable ones.

Watch for the false mutual: a document that looks symmetrical but whose definitions and exceptions are drafted so that only one side’s information gets real protection. Read the definitions against what each party is actually going to disclose before calling it balanced.

The clauses that decide whether an NDA works

Definition of confidential information

Breadth is the most common problem. A definition covering all information disclosed, marked or not, in any form, including the fact of the discussions, creates an obligation nobody can track or comply with. Recipients who see many similar deals should also look for an independent development clause, or they can be accused of taint by anything they build later in the same space.

The standard carve outs

Most Canadian NDAs exclude information that was already known to the recipient, is or becomes public through no breach, was independently developed without using the disclosed information, was received from a third party free to disclose it, or must be disclosed by law or court order. Their absence is usually drafting laziness rather than strategy, so asking for them rarely causes friction.

Term and survival

Perpetual confidentiality is defensible for genuine trade secrets and hard to justify for ordinary business information, where two to five years often reflects the real shelf life. A clean structure sets a defined term for general confidential information and carves out trade secrets for as long as they remain secret.

Remedies clauses

Many NDAs include an acknowledgment that a breach would cause irreparable harm and that injunctive relief is appropriate. Courts still apply their own test, so treat the clause as helpful rather than decisive. Liquidated damages can work where the number is a genuine advance estimate of loss; a figure pulled from the air risks being treated as an unenforceable penalty.

Are NDAs enforceable in Canada?

Generally yes, as contracts, subject to the usual limits. Two limits matter in practice.

First, an NDA cannot be used to prevent a person from reporting a crime, testifying, or complying with a legal obligation to disclose. Confidentiality clauses that try to reach that far invite a court to look hard at the rest of the document.

Second, restraints on working are policed separately. Section 67.2(1) of the Employment Standards Act, 2000 prohibits an Ontario employer from entering into an employment contract or other agreement with an employee that is, or includes, a non compete agreement, and section 67.2(2) makes a prohibited non compete void. Section 67.2(3) preserves a narrow exception tied to the sale of a business. A confidentiality clause drafted so broadly that it operates as a restraint on where someone can work can attract the same scrutiny.

Red flags before you sign

• A non compete wearing a non use label. A clause barring the recipient from using confidential information to compete, where confidential information is defined broadly enough to include general market knowledge, is a restraint on competition in substance.
• Non solicitation clauses folded in. Restrictions on hiring employees or approaching customers change what you are agreeing to and belong in a negotiated commercial agreement, not an NDA signed at the start of a conversation.
• Intellectual property assignment. Language making all feedback, suggestions or derived work the property of the disclosing party is an IP transfer inside a confidentiality document.
• One way indemnities. An indemnity that runs in one direction only, in a document presented as mutual, deserves a question.
• Affiliate and representative scope. Obligations extending to every affiliate of a large corporate group, or strict liability for any representative’s breach regardless of fault, can multiply exposure well past what the deal is worth.
• Expensive venue clauses. A jurisdiction or forum clause pointing somewhere far away can decide whether a dispute is realistically worth pursuing at all.

What happens if someone breaches an NDA

The remedy that usually matters most is the interlocutory injunction. Where a breach is ongoing or about to happen, a court applies the three part test restated in RJR-MacDonald Inc. v. Canada (Attorney General): a serious issue to be tried, irreparable harm, and the balance of convenience. Confidential information cases can meet the irreparable harm branch more readily than many others, because information that has been absorbed into a competitor’s operations is hard to put back. Speed matters, and delay tends to work against the party asking for the order.

Damages are available in principle. In Cadbury Schweppes Inc. v. FBI Foods Ltd., the Supreme Court of Canada treated the remedy for breach of confidence as flexible and fitted to the facts, awarding a monetary remedy measured by the head start the defendant gained rather than granting an injunction. The practical difficulty is proof: linking a specific lost customer or competing product to a specific disclosure is evidence heavy work.

An accounting of profits is also possible as an equitable remedy, though it requires the other side to have made identifiable profits from the misuse, which is often not yet true when you need to act.

The honest summary is that an NDA gives you deterrence, an evidentiary foundation, and leverage for a fast negotiated standstill backed by a credible injunction threat. Against someone with no assets, none of it is worth much. Where the information is genuinely valuable, contractual protection works best alongside operational protection such as access controls and staged disclosure.

NDA or a confidentiality clause in a bigger contract

A standalone NDA suits the stage before there is a deal, when parties are exchanging information to decide whether to proceed. Once there is a contract, confidentiality usually belongs inside it, tied to that relationship’s purpose, term and termination provisions.

Two documents covering the same information with different definitions and different terms is a common and avoidable problem. If an NDA is signed first and a services or employment agreement follows, say clearly which one governs. Confidentiality obligations for staff normally sit inside the employment contract, and for contractors inside the independent contractor agreement, alongside the intellectual property terms.

When an NDA is worth it, and when it is theatre

Worth it: due diligence with a defined data room, technical disclosure of a process or specification, and any situation where you want a clear record that a confidential relationship existed.

Usually not worth it: an NDA demanded from your own lawyer, accountant or banker, who already owe stricter professional duties; an NDA pressed on institutional investors, most of whom will not sign one; and an NDA over material that is going into a deck being emailed around anyway.

Whether a given NDA is doing real work depends on what you are disclosing and to whom, which is worth a short conversation with a lawyer before you sign rather than after.

Get your NDA drafted or reviewed before you sign

Angrove Law drafts and reviews non disclosure agreements for Ontario businesses at flat fees, including the triage read that finds the non compete or the IP assignment hiding in a template. You can see the rest of our business law services or book a free consult call.

Non disclosure agreement FAQs

This article is general information about Canadian and Ontario law, not legal advice, and every agreement and business is different. Speak with a lawyer about your own situation before signing or acting on an NDA.

Business law

Don’t just start a business. Build one that lasts.

Incorporation, contracts and advice on flat fees. Plain language, no billable-hour surprises.

Book a free consult ↗