What Ontario Employers Get Wrong About Just Cause Termination

Just cause termination -- ending the employment relationship without notice or pay in lieu -- is one of the most frequently misapplied concepts in Ontario employment law. Employers hear the phrase, decide the conduct is serious enough, and proceed with a dismissal they believe is legally bulletproof. Ontario courts disagree more often than employers expect.

The standard for just cause in Ontario is high. It is not a question of whether the employer was justified in being angry, or whether the employee did something genuinely wrong. The question is whether the conduct was serious enough to permanently and irrevocably destroy the employment relationship -- and whether summary dismissal was a proportionate response to it. Most of the time, the answer is no.

What Just Cause Actually Means in Ontario

Ontario courts apply a contextual test established in McKinley v. BC Tel and refined in subsequent decisions. The inquiry does not stop at whether misconduct occurred. It asks whether the misconduct, in the full context of the employment relationship, justified the most serious disciplinary response available: permanent dismissal without compensation.

The factors courts weigh include the nature and severity of the conduct, the employee’s length of service, their prior disciplinary record, any mitigating circumstances, whether the employer was partly responsible for the situation, and whether the conduct was condoned -- knowingly overlooked -- at any point. A ten-year employee with no prior warnings who commits a single dishonest act is not the same case as a recently hired employee who has already received multiple written warnings for the same category of conduct. The contextual analysis requires both to be assessed on their own facts.

The Condonation Problem

One of the most common reasons a just cause termination fails in court is condonation: the employer knew about the conduct, did not address it, and continued the employment relationship. Once an employer becomes aware of misconduct and takes no meaningful action, they are generally understood to have condoned it. A subsequent termination for the same conduct -- or a pattern that was never formally addressed -- will not support a just cause finding.

Condonation is also established through delay. An employer who discovers a serious act of dishonesty in January and does not terminate until March, continuing the employment relationship in the interim without explanation, will likely be found to have waived the right to summarily dismiss for that conduct. The law expects employers to act promptly when they discover conduct serious enough to support termination. Hesitation is taken as evidence the employer did not, themselves, consider the conduct to be terminable.

Progressive Discipline Is Not Optional

Ontario courts expect employers to have engaged in progressive discipline before summarily dismissing an employee for anything short of the most serious misconduct. Progressive discipline serves two purposes: it gives the employee a genuine opportunity to correct the behaviour, and it creates a documented record showing that the employer acted reasonably before resorting to termination.

Performance issues, attendance problems, attitude or conduct concerns, and most policy breaches require a documented progression of warnings before just cause can be established. The exception is conduct that is so fundamentally dishonest or dangerous that it destroys the employment relationship on the first occurrence: fraud, theft, serious physical violence, or conduct that makes continued employment practically impossible. Even in those cases, the employer must be able to show what they knew, when they knew it, and that they investigated before acting.

The Investigation Requirement

A just cause termination that was not preceded by a proper investigation is vulnerable regardless of whether the underlying conduct was actually serious. Courts look at whether the employer made a reasonable and thorough effort to determine the facts before acting. An employer who fires an employee based on an allegation -- without interviewing the accused, reviewing relevant documents, or giving the employee an opportunity to respond -- is not in a strong position if the decision is later challenged.

The investigation does not need to be lengthy or formal for every matter. What it needs to be is proportionate to the seriousness of the allegation, procedurally fair, and documented. The employer should be able to demonstrate that they gathered the relevant evidence, heard the employee’s version of events, and made a reasoned decision. Termination before that process is complete creates both legal exposure and, in unionized workplaces, a procedural grievance on its own.

What a Failed Just Cause Termination Actually Costs

An employer who terminates for cause and fails to establish it at trial does not simply owe the notice package they withheld. They owe common law reasonable notice, calculated as though the termination were without cause from the start. For a ten-year employee in a supervisory role, that may be ten to fourteen months of compensation. If the manner of the dismissal was particularly harsh -- alleging cause publicly, accusing the employee of misconduct without a proper investigation, or handling the termination meeting poorly -- courts can award aggravated or moral damages on top of the notice entitlement.

The cost differential between a well-structured without-cause termination and a failed just-cause termination is not marginal. In practice, the failed just-cause route often costs more than twice what a properly calculated without-cause package would have cost at the outset -- plus the legal fees on both sides.

When Just Cause Is Available -- and What to Do Before Acting

Just cause termination is the right call in genuine cases: serious theft or fraud, deliberate harassment of another employee, significant dishonesty that undermines the trust fundamental to the role, or conduct that makes continued employment unsafe or impractical. In those cases, the employer needs to act promptly, investigate properly, document thoroughly, and ensure the record supports the decision.

Before proceeding with any just cause termination, an Ontario employer should be able to answer four questions clearly. First, what specific conduct justifies dismissal and when was it discovered? Second, has the employee been given a fair opportunity to respond to the allegation? Third, does the record reflect any history of discipline for related conduct, or is this a first occurrence? Fourth, is the response proportionate to the seriousness of what occurred? If any of those questions does not have a clean answer, the employer is not ready to proceed.