Toronto, ON — March 18th, 2026 — Workplace rules do not end at the office door. In Ontario, employer‑sponsored social events – whether holiday parties, team‑building outings, client receptions, or off‑site celebrations – may be treated as an extension of the workplace. If your organization planned, sanctioned, encouraged, or funded the event, office standards may extend beyond the typical 9-5.
Misconduct at employer-affiliated events can expose employers to multiple forms of liability, including breaches of the Occupational Health and Safety Act (OHSA), violations of the Human Rights Code, and civil liability where the employer may be held responsible.
The Duty to Investigate
Under OHSA, employers must maintain a workplace free of harassment and violence and ensure that incidents are investigated appropriately. Courts have clarified that this duty can extend to off‑duty or online conduct with workplace ramifications, and can apply even without a formal complaint.
In Metrolinx v. ATU, Local 1587, 2025 ONCA 415 five employees participated in a private, off‑duty WhatsApp group chat where they made derogatory, sexist, and sexually harassing comments about a female co‑worker. These included accusations that she had exchanged sexual favours for professional advancement.
In this case, the chat took place off‑duty, on personal phones, and was not employer‑sanctioned. The female co‑worker targeted by the comments did not want a formal investigation but did report the messages to a supervisor. Human Resources eventually became aware of the messages and initiated a formal investigation.
After investigating, Metrolinx terminated all five employees for cause on the basis of sexual harassment. The union grieved the terminations. While the Arbitrator reinstated the employees, the Divisional Court held that the Arbitrator’s decision was unreasonable. The Divisional Court found that the messages clearly affected the workplace, regardless of where they were made, and that off‑duty conduct with a workplace impact fell squarely within the employer’s authority. Metrolinx also had a statutory duty under OHSA to investigate once it became aware of the harassment.
The Ontario Court of Appeal upheld the Divisional Court’s ruling.
This case demonstrates that online, after‑hours conduct can become a workplace issue when it harms a co‑worker or affects the work environment. It also reinforces that employers must investigate workplace harassment even in the absence of a formal complaint.
The Risk of Civil Exposure to Employers
In addition to statutory obligations, employers face broader civil exposure when their events materially increase the risk of harm. Canadian jurisprudence recognizes both social‑host liability and vicarious liability in cases involving alcohol, unsafe conditions, or employer‑created environments where misconduct becomes foreseeable.
The Supreme Court of Canada’s decision in Bazley v. Curry, 1999 CanLII 692 (SCC), established a two‑stage test for vicarious liability: courts first determine whether existing precedents impose liability, and if not, they assess whether the employer’s enterprise or business operations materially increased the risk of the wrongful act. The Court stressed that liability is not about whether the employer authorized the misconduct, but whether the employer’s structure or environment significantly contributed to the risk that harm would occur.
This reasoning has been applied in key cases involving workplace social events.
In Jacobsen v. Nike Canada Ltd., 1996 CanLII 3429 (BC SC) the employer supplied a substantial amount of beer to employees during work hours. The employee continued drinking afterward with co‑workers at nightclubs and was severely injured the next morning. The Court concluded the employer created or materially increased the risk of harm by supplying alcohol, failing to monitor consumption, and not ensuring safe transportation. The employer was therefore liable for the resulting injuries.
In K.L. v. 1163957799 Quebec Inc. (Calypso Water Park), 2015 ONSC 2417, a staff party at a water park permitted employer‑provided alcohol and BYOB consumption. During the event, a supervisor sexually assaulted an employee, and the court found that the employer could be vicariously liable because it created an environment with access to alcohol, inadequate supervision and blurred professional boundaries, materially increasing the risk of misconduct.
These cases make clear that employers are responsible not only for conduct at the event but also for the foreseeable consequences arising from how the event was structured.
What Employers Should Do
To reduce risk and meet legal obligations, employers should adopt the following measures:
- Circulate a social‑events memo before the event. Reiterate that all workplace policies apply (Code of Conduct; Anti‑Harassment & Violence; Alcohol/Drug; Social Media). Clarify that misconduct may result in discipline up to termination.
- Designate trained on‑site contact(s). Assign HR/manager “event monitors” to discreetly intervene, document issues, and coordinate safe transportation for impaired guests.
- Manage alcohol as a risk factor, not a perk. Use drink tickets, Smart Serve‑certified bartenders, non‑alcoholic options, food service, and empower servers to cut off service – even for senior leaders.
- Arrange safe‑ride options including taxi chits, Ubers, rideshares, or shuttle services.
- Confirm that the venue has appropriate safety measures in place, including adequate lighting, safe flooring and security. Communicate expectations to venue staff in advance. Poor venue conditions or inadequate supervision can increase risk.
- Clarify start/stop times and “after‑party” boundaries. Clarify what the employer is sponsoring and when it ends; risk escalates when supervision and formal hosting end, but the group continues elsewhere.
- Investigate early. Trigger an investigation as soon as you receive information about potential harassment, sexual harassment, violence, threats, discriminatory conduct or credible safety concerns, including those arising from intoxication.
If you’re hosting an event or managing an off‑duty conduct issue, reach out to our team for practical guidance.
