- Just cause dismissal means no notice, no pay in lieu, and no severance.
- The threshold is high, and the burden of proving it rests entirely on the employer.
- Courts apply a proportionality analysis: does the misconduct actually justify ending the relationship?
- The statutory test for withholding pay under the Employment Standards Act is different and even harder to meet.
What is at stake
Cause is sometimes described as the capital punishment of employment law, and the description is apt. An employee dismissed for cause receives nothing, no notice, no pay in lieu, and in many cases no statutory entitlements either.
Because the consequence is so severe, the threshold is correspondingly high, and employers who assert cause without a solid foundation frequently lose.
The proportionality analysis
The question is not simply whether misconduct occurred. It is whether the misconduct, in all the circumstances, was serious enough to fundamentally breach the employment relationship.
Courts weigh the nature and seriousness of the conduct against the surrounding context: length of service, the employee’s record, the position held, whether the employee was warned, whether the employer’s own conduct contributed, and whether a lesser response would have been appropriate.
The consequence is that identical conduct can justify dismissal in one case and not another. A first-time lapse by a twenty-year employee with a clean record is treated very differently from repeated conduct after clear warnings.
Where cause is usually established
Dishonesty going to the core of the relationship, theft, fraud, falsifying records, is the strongest category, though even here courts consider context rather than treating it as automatic.
Serious misconduct such as violence, harassment, or a serious breach of a safety rule can qualify.
A conflict of interest, or competing with the employer while employed, can qualify.
Insubordination can qualify where it is serious and persistent, though a single refusal rarely does.
Where it usually is not
Poor performance is a common assertion and a frequent failure. Incompetence can in principle justify dismissal, but the employer generally has to show that a clear standard was set, that the employee was told they were failing to meet it, that they were given a reasonable opportunity and support to improve, and that they did not.
Absent that record, a performance dismissal is usually a dismissal without cause with a label on it.
Personality conflicts, a single instance of poor judgment, and off-duty conduct with no real connection to the employment are all weak grounds.
The two-tier problem for employers
Establishing cause at common law does not automatically permit withholding statutory entitlements.
The Employment Standards Act has its own standard, expressed in terms of wilful misconduct, neglect of duty or disobedience that is not trivial and has not been condoned. It requires something close to intentional wrongdoing.
The result is that an employer can succeed in defending a wrongful dismissal claim at common law and still owe statutory notice and severance. Employers frequently do not anticipate this.
Procedure
How a dismissal is carried out matters. An employer that fails to investigate, that reaches a conclusion before hearing the employee, or that alleges cause without foundation exposes itself to additional damages.
Ontario courts have awarded damages for the manner of dismissal where an employer conducted itself unfairly or in bad faith, for example, by maintaining an unfounded allegation of dishonesty through litigation, which can cause real reputational harm.
For an employee, the same point cuts the other way: participate in the investigation, respond in writing, and keep the record.
Common questions
Can I be fired for cause for one mistake?
Rarely, unless the single act is very serious. The proportionality analysis usually favours a lesser response for an isolated lapse.
Does an employer have to warn me first?
Not for the most serious misconduct, but for performance and for lesser conduct issues, the absence of warnings is usually fatal to a cause allegation.
What happens if the employer alleges cause and loses?
The employee is entitled to notice as if dismissed without cause, and an unfounded allegation can support additional damages and a costs award.
Can conduct outside work be cause?
Only where it has a genuine connection to the employment, for instance, where it damages the employer’s reputation or makes the employee unable to perform the role.
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