Contract Law in Canada

A verbal agreement to pay for work done. A click-wrap terms-of-service box. A 40-page commercial lease. A handshake deal between business partners. All of these can be legally binding contracts in Canada — and all of them can be breached. This guide explains what makes a contract enforceable, what happens when one side fails to perform, and what remedies are available under Canadian law.

What Makes a Contract Legally Binding in Canada

Five elements are required. If any one is missing, the agreement is not enforceable as a contract.

Consideration does not have to be equal in value — courts do not assess adequacy. But it must exist. A promise to give a gift is not a contract. A promise to pay $1 for a $500,000 property transfer is technically valid consideration, though courts may scrutinize it for unconscionability.

Age of majority by province: 18 in Ontario, Alberta, Manitoba, PEI, Quebec, and Saskatchewan. 19 in BC, New Brunswick, Newfoundland and Labrador, Northwest Territories, Nova Scotia, Nunavut, and Yukon. Contracts with minors are generally voidable at the minor's option, with exceptions for necessities (food, clothing, shelter).

Written, Verbal, and Implied Contracts

Most contracts in Canada do not need to be in writing to be enforceable. The exceptions are significant:

• Real estate transactions — must be in writing under provincial Statute of Frauds legislation (e.g., Ontario's Statute of Frauds, R.S.O. 1990)
• Guarantees — a promise to pay another person's debt must be in writing
• Consumer contracts — Ontario's Consumer Protection Act, 2002 requires written disclosure for certain consumer agreements

A verbal contract is enforceable but difficult to prove. Courts look at conduct, emails, text messages, and witness testimony to determine what was agreed. If the other side denies the terms, you are in a credibility dispute.

Implied contracts arise from conduct rather than explicit agreement. An employee who continues working after their written contract expires may be operating under an implied contract on the same terms.

Electronic contracts are valid across Canada under provincial Electronic Commerce Acts. Click-wrap agreements (where you click "I agree") are enforceable, provided the terms were reasonably brought to the user's attention before acceptance — a point litigated frequently in consumer disputes.

Breach of Contract: Material vs. Minor

The distinction between a material breach and a minor breach determines what remedies are available.

Anticipatory breach matters practically: if a contractor tells you in March that they will not complete the July project, you do not have to wait until July to sue. You can accept the repudiation, find another contractor, and claim the cost difference as damages immediately.

The line between material and minor breach is not always clear. Courts look at the proportion of the contract affected, whether the breach can be remedied, and whether the innocent party received substantially what they bargained for.

Remedies for Breach of Contract in Canada

The remoteness rule (Hadley v Baxendale): Damages are limited to losses that were reasonably foreseeable at the time the contract was made. A party cannot recover for unusual losses the other side had no reason to anticipate — unless those unusual circumstances were communicated at the time of contracting.

Duty to mitigate: The innocent party must take reasonable steps to reduce their losses. A landlord whose tenant abandons the lease must try to re-rent the unit; they cannot let it sit empty and claim full rent for the remaining term.

Good faith in Canadian contracts: In Bhasin v Hrynew [2014] SCC 71, the Supreme Court of Canada recognized a general organizing principle of good faith in contract performance. This does not impose a duty to subordinate your interests to the other party's — but it prohibits actively deceiving the other party or exercising contractual discretion in bad faith. C.M. Callow Inc. v Zollinger [2020] SCC 45 extended this: a party cannot knowingly mislead the other about whether they intend to exercise a contractual right.

Key Contract Clauses: What They Actually Mean

Force majeure clause — Excuses a party from performance if an extraordinary event beyond their control makes performance impossible. Canadian courts interpret these clauses narrowly. The event must be specifically listed or clearly within the clause's scope. During COVID-19 litigation, most Canadian courts declined to apply force majeure clauses to supply chain disruptions or reduced demand — the event had to make performance truly impossible, not merely more expensive or inconvenient.

Entire agreement clause — States that the written contract is the complete agreement, and that prior verbal or written discussions are not part of it. This clause can prevent you from relying on promises made during negotiations that were not written into the final document.

Severability clause — If one part of the contract is found unenforceable, the rest remains valid. Without this clause, a court finding one term void could potentially void the entire agreement.

Limitation of liability clause — Caps the amount one party can recover from the other. Common in commercial contracts and software agreements. The Supreme Court's three-step test from Tercon Contractors v British Columbia [2010] SCC 4 applies: (1) Does the clause apply on its proper interpretation? (2) Was it unconscionable at the time of contracting? (3) Is there a public policy reason to refuse enforcement?

Indemnification clause — One party agrees to compensate the other for specified losses, including losses caused by third parties. To cover a party's own negligence, the clause must say so explicitly — courts do not read in coverage for negligence unless the language is clear.

Liquidated damages clause — Sets a pre-agreed amount payable on breach. Enforceable if it represents a genuine pre-estimate of loss at the time of contracting. If it is a penalty designed to punish rather than compensate, Canadian courts will not enforce it (Elsley v J.G. Collins Insurance Agencies [1978] 2 SCR 916).

Non-Compete and Confidentiality Clauses

Non-compete clauses in employment: Ontario's Working for Workers Act, 2021 (effective October 25, 2021) prohibits non-compete agreements for most employees. The ban does not apply to executives or to non-competes entered into as part of the sale of a business. In other provinces, non-competes remain enforceable if they are reasonable in scope, geographic area, and duration — courts will not enforce a clause broader than necessary to protect a legitimate business interest.

Non-disclosure agreements (NDAs): Enforceable across Canada, but cannot be used to prevent reporting of criminal conduct or human rights violations. NDAs in employment settlements have faced increased scrutiny since 2021, with several provinces considering legislation to limit their use in cases involving workplace harassment.

Confidentiality clauses in commercial contracts are generally enforceable without the geographic and duration restrictions that apply to non-competes. The key requirement: the information protected must actually be confidential — publicly available information cannot be made confidential by contract.

Contract Law in Quebec vs. Common Law Provinces

Quebec's private law is governed by the Civil Code of Quebec (CCQ), not common law. The differences are substantive, not just terminological.

If you are contracting with a Quebec-based party, the governing law clause matters. A contract governed by Quebec law will be interpreted under the CCQ, not common law principles.

Limitation Periods for Contract Claims

Missing the limitation period means losing the right to sue, regardless of how strong the case is.

Discovery rule: The clock starts when you knew, or reasonably ought to have known, that you had a claim. For a breach that is concealed or not immediately apparent, the limitation period may start later than the date of breach.

Acknowledgment of debt: If the breaching party acknowledges the debt in writing within the limitation period, the clock resets. This is why creditors often seek written acknowledgments before the limitation period expires.

Consumer Contract Protections in Canada

Consumers have additional protections beyond general contract law. Provincial consumer protection legislation imposes mandatory terms that cannot be contracted out of.

Ontario Consumer Protection Act, 2002:

• Internet agreements over $50 must include specific disclosure; consumers have a 7-day cooling-off period
• Direct agreements (door-to-door sales) have a 10-day cooling-off period
• Unfair practices (false representations, unconscionable conduct) give the consumer the right to rescind the agreement

BC Business Practices and Consumer Protection Act: Similar cooling-off rights; specific rules for time-share agreements, future performance contracts, and direct sales.

Federal level: The Competition Act prohibits misleading advertising and deceptive marketing practices. The Consumer Privacy Protection Act (CPPA), in force as of 2026, gives consumers rights over personal data collected through commercial contracts, including the right to erasure and data portability.