Are penalty clauses in contracts enforceable in Ontario?

Ontario courts draw a sharp distinction between a liquidated damages clause and a penalty clause. A liquidated damages clause is a genuine pre-estimate of the loss that would result from a breach — courts will generally enforce these as a practical way for parties to set damages in advance. A penalty clause, by contrast, imposes a payment that is out of all proportion to any conceivable loss and is designed primarily to punish or coerce — courts have traditionally refused to enforce penalties.

The key question is whether the clause was a genuine attempt to estimate probable loss at the time of contracting, or was a deterrent unmoored from likely harm. Courts look at the circumstances at the time the contract was signed, not with hindsight.

Recent developments in Canadian contract law have shifted somewhat toward giving commercial parties more flexibility. Courts are more willing to uphold clauses where sophisticated parties with equal bargaining power freely agreed to a specific sum. But very large sums vastly disproportionate to actual loss remain vulnerable to challenge.

If a contract you signed contains a large payment clause following a breach, or if you are drafting one, legal advice on how it would likely be characterized by a court is well worth obtaining.