If a guest drinks at your party and causes a crash, are you responsible? The Supreme Court treats social hosts and commercial hosts very differently.

Two Supreme Court of Canada decisions set the rules on host liability for alcohol: Stewart v. Pettie (1995) for commercial hosts, and Childs v. Desormeaux, 2006 SCC 18, for social hosts.
Commercial hosts, such as bars and restaurants, owe a duty of care to the public and to their patrons. Social hosts generally don't owe a duty to people on the road just because they served alcohol, though active involvement can change that.

A patron drank at a dinner theatre and later crashed, injuring a passenger. The Supreme Court held that commercial hosts owe a duty to third parties, such as other road users, because they profit from serving alcohol and can monitor consumption. On the facts, though, the theatre wasn't liable: the patron was with sober companions, so it wasn't foreseeable that he would drive.
After a BYOB party in Ontario, a guest drove while impaired and caused a crash that seriously injured Zoe Childs. The Supreme Court held that the hosts didn't owe a duty of care to her. Social hosts don't profit from serving alcohol, aren't as well placed to monitor guests, and don't normally control guests' choices.
The court left room for liability where hosts actively create or add to the risk, for example by serving a visibly intoxicated guest and then handing over the keys.
Wondering how a decision like this applies to your situation? NEO can review your facts and explain your options. Call 647-200-3526 or toll-free 888-519-2435, email info@neolegalservices.com, or book a free consultation.
Read next: Rankin's Garage v. J.J.: Is a Business Liable When Teens Steal a Car?
General Ontario legal information, not legal advice for your matter, and reading it does not create a retainer. Sources checked 15 October 2026: check the current law, forms and dates before you act.
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This article is general information for people in Ontario, not legal advice. Rules, forms and deadlines change, and every situation is different. Check the current rule or speak to a licensed legal professional before you act.
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