How Ontario Courts Interpret an Ambiguous Termination Clause

Termination clauses are meant to tell you, in plain terms, what happens if your employment ends. In practice, many are written vaguely, inconsistently, or in a way that could be read more than one way. When that happens, Ontario courts don't simply pick whichever reading seems most reasonable in the abstract — they apply a consistent principle that tends to favour the employee.

Understanding this principle matters whether you're trying to figure out what you're owed after a termination, or reviewing a contract before you sign it.

Why Termination Clauses Get Written This Way

Termination clauses are almost always drafted entirely by the employer, usually from a template, often without input from the employee. They're meant to limit what an employee can claim if things end badly — typically by capping entitlements at the legislated minimums under the Employment Standards Act, 2000 rather than the more generous common-law standard that would otherwise apply.

Because these clauses are trying to do something restrictive, courts scrutinize them closely, and drafting problems come up often: contradictory sub-clauses, undefined terms, language copied from an outdated template, or wording that could technically allow something below the statutory floor in some hypothetical scenario.

The Core Interpretation Principle

When a termination clause is genuinely capable of more than one reasonable interpretation, Ontario courts generally resolve that ambiguity in favour of the employee, not the employer. This reflects two ideas working together:

• The employer wrote the clause and had the opportunity to make it clear — any resulting confusion is generally treated as the employer's problem, not the employee's.
• Employment contracts, and termination clauses specifically, are read with the underlying protective purpose of employment standards legislation in mind — courts are reluctant to let ambiguous drafting quietly strip away rights that legislation was designed to protect.

What Counts as a "Real" Ambiguity

Not every awkward sentence is legally ambiguous. Courts generally distinguish between:

• Genuine ambiguity — the clause is capable of two or more reasonable interpretations, and at least one of them would violate the ESA or produce an unfair result.
• Imprecise but clear wording — the clause is inelegantly written but has only one sensible meaning once read as a whole and in context.

Only the first category typically triggers the employee-favouring interpretation rule. The second is usually just enforced as written.

Common Sources of Ambiguity in Real Contracts

• Separate "with cause" and "without cause" provisions that don't clearly distinguish the two scenarios
• A clause that could be read, in some circumstance, to provide less than the ESA minimum notice or severance
• Undefined terms like "compensation," "benefits," or "termination date" used inconsistently elsewhere in the contract
• Old template language never updated after a legislative change
• A clause that attempts to limit an employee's entitlement but fails to address every way employment could end — for example, only addressing termination "without cause" and staying silent on other scenarios

A significant modern trend in this area is that courts increasingly look at a termination clause as a whole: if any part of it could, in any circumstance, produce a result below the ESA floor, that can be enough to make the entire clause unenforceable, not just the offending portion.

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