Common Misconceptions About Breach Of Contract Claims In Ontario
April 22, 2026
BY: IAN ANDREW LAW
A business relationship starts to come apart. Payments stop. Deadlines slip. The other side takes a position that feels obviously wrong. At that stage, many owners assume the legal answer must also be obvious: if the conduct was bad, the breach claim must be strong.
Ontario contract disputes are usually narrower than that first reaction suggests. A claim may still be strong, but the court will ask more disciplined questions: what the contract required, what the objective record shows, whether the loss is provable, and whether any timing or process issue changes the file.
KEY TAKEAWAYS:
A breach claim starts with the contract, not the level of frustration.
Unfair conduct is not always a legal breach.
Good faith does not turn every disappointing result into a claim.
Damages, causation, mitigation, and timing often decide the file.
Early case assessment is usually more important than early anger.
The First Misconception: A Bad Outcome Automatically Means A Breach
Ontario courts begin with the parties’ bargain. That means the first question is usually not whether the situation feels unfair. It is whether the contract, read as a whole, actually imposed the obligation allegedly breached. A client may feel misled, sidelined, or commercially squeezed, but if the written deal gave the other side that room to act, the legal claim may be much narrower than the business grievance.
That is why contract disputes often turn on a small number of clauses: payment mechanics, notice provisions, termination rights, limitation of liability language, discretion clauses, amendments, and dispute resolution terms. A broad sense of wrongdoing is not enough on its own.
The Second Misconception: Good Faith Fixes Everything
Good faith is important in Ontario contract law, but it is not a general fairness code. The Supreme Court of Canada recognized good faith as an organizing principle in contractual performance and confirmed a duty of honest performance. Later cases also clarified that contractual discretion must be exercised in a way connected to the purpose for which it was granted.
But none of that means a counterparty must put the other party’s interests first. A party can still protect its own economic position. Ontario appellate authority now makes that point quite clearly. The line is not between hard conduct and soft conduct. The line is between commercially self-interested conduct that the contract permits, and conduct that becomes dishonest, arbitrary in the legal sense, or disconnected from the bargain.
The Third Misconception: If There Was A Breach, The Rest Is Easy
Even where breach can be shown, the file is not over. A plaintiff still has to prove that the breach caused compensable loss. That brings in documentary proof, timing, mitigation, and sometimes difficult questions about whether the claimed damage was really caused by the impugned act or by broader business problems already in motion.
Ontario limitation periods also matter. In Ontario, the basic limitation period is generally two years from the date the claim was discovered, subject to contractual modification, other statutory regimes, and case-specific issues about when discoverability was actually triggered. Delay can damage a claim before the merits are ever fully tested. So can careless communications, inconsistent internal documents, or an early narrative that does not match the actual wording of the agreement.
What This Means In Practice
A strong breach case is usually built upstream. The agreement needs to be read closely. Amendments, side emails, notices, invoices, and internal records need to be aligned with the pleaded theory. The commercial backdrop matters, but it must be objective and verifiable. In other words, a contract claim is not just a story about what went wrong. It is a structured legal argument built on text, facts, and evidence.The most expensive misconception about contracts is often the simplest: assuming that commercial disappointment and legal breach are the same thing. Sometimes they overlap. Often they do not. The value is in finding that out early and properly.
SOURCES
• Sattva Capital Corp. v. Creston Moly Corp., 2014 SCC 53.
• Bhasin v. Hrynew, 2014 SCC 71.
• C.M. Callow Inc. v. Zollinger, 2020 SCC 45.
• Wastech Services Ltd. v. Greater Vancouver Sewerage and Drainage District, 2021 SCC 7.
• Limitations Act, 2002, S.O. 2002, c. 24, Sched. B, ss. 4, 5.
This article is for general information purposes only and does not constitute legal advice. Reading this article does not create a solicitor-client relationship. If you require advice specific to your situation, contact my office.