Vicarious Liability — Ontario Employment Law

Vicarious liability is a foundational principle of common law that holds an employer legally and financially responsible for the wrongful actions or omissions of its employees. Unlike direct liability—where an organization is sued for its own specific failures, such as ignoring safety standards or instituting a flawed policy—vicarious liability means the employer is held strictly accountable simply because of its relationship with the at-fault employee. In Ontario, this doctrine is critical for workers, customers, or third parties who suffer harm, as companies typically possess the financial resources or insurance policies required to adequately compensate victims.

To trigger vicarious liability, the employee's wrongful act must occur "in the course of employment." This does not just mean the employee was on the payroll or on the clock at the time. Ontario courts examine whether the act was formally authorized by the employer, or if it was an unauthorized, wrongful method of performing an authorized act. Even intentional harms, such as physical assault or fraud, can saddle a company with liability if the employer's enterprise created or materially enhanced the risk of the wrongdoing. For instance, if a company enlists a worker to perform physical security duties and that worker uses excessive force, the employer is generally responsible for the resulting damages.

However, determining employer accountability in Ontario features a highly specific nuance regarding sexual harassment. Section 46.3 of the Ontario Human Rights Code (OHRC) explicitly protects corporations from being held automatically vicariously liable for rogue acts of sexual harassment committed by one employee against another. If a coworker harasses you, the employer is not strictly liable for the act itself under the OHRC. Despite this shield, employers frequently face direct liability in these exact scenarios if they fail to conduct a proper investigation, fail to protect the worker under the Occupational Health and Safety Act (OHSA), or allow a poisoned work environment to take root. Severe, unaddressed misconduct from a supervisor or coworker can also trigger common law claims of constructive dismissal, based on the employer's failure to provide a safe space.

Because tracing the legal boundaries of what qualifies as an employee's "course of duties" relies entirely on the specific facts of the dispute, generic assumptions are dangerous. Anyone looking to hold an enterprise accountable for a worker's rogue behaviour should have the unique details of their situation reviewed by a qualified Ontario legal professional to identify the strongest path forward.