Frustration of contract occurs when an unexpected event — beyond the control of either party — makes it impossible to continue the employment relationship. When this happens, the law treats the contract as ended automatically, without either side technically terminating it.
Common situations that trigger frustration include:
- A serious illness or injury that permanently prevents you from doing your job
- A criminal conviction that makes continued employment impossible
- A government-imposed restriction that eliminates the role entirely
- A catastrophic event that destroys the business or workplace
The key word is permanent. Frustration does not apply to temporary absences or recoverable conditions.
Why It Matters to Employees
Here is where frustration of contract becomes legally significant — and potentially harmful to employees.
When a contract is frustrated, the employer may argue they owe no termination pay or severance pay under common law, because the contract ended on its own rather than through a dismissal.
If that argument succeeds, an employee who became seriously ill and could not return to work might walk away with nothing beyond ESA minimums — even after years of service.
This is why understanding frustration of contract — and challenging it where appropriate — matters enormously.
ESA Protections Still Apply
Even where frustration is established, the Employment Standards Act still provides minimum protections. Under Ontario Regulation 288/01, an employee whose contract is frustrated due to illness or injury is still entitled to:
- ESA termination pay — based on length of service
- ESA severance pay — if they meet the eligibility criteria
These minimums cannot be taken away simply because the employer invokes frustration of contract. What frustration may eliminate is the common law reasonable notice entitlement — which is often the largest part of a severance claim.
The Illness and Disability Problem
The most common — and most contested — frustration scenario involves an employee who has been on a medical leave for an extended period and cannot provide a clear return-to-work date.
Employers sometimes use this situation to declare the contract frustrated and end the employment relationship without paying common law notice. But courts in Ontario have been clear — frustration due to illness requires the employer to show that the incapacity is permanent or of indefinite duration with no reasonable prospect of recovery.
An employer cannot simply wait out a disability leave for a few months and declare frustration. The threshold is high.
The Intersection With the Human Rights Code
This is critical. If an employee’s inability to work is connected to a disability, the employer’s duty to accommodate under the Ontario Human Rights Code applies — and that duty must be exhausted before frustration can even be considered.
Declaring a contract frustrated while a disability accommodation remains unexplored is not just legally risky — it may constitute discrimination.
If you were let go during or after a medical leave and your employer used the word “frustration” — or simply stopped communicating — get legal advice immediately.
What Employers Need to Know
Frustration of contract is not a tool for avoiding severance obligations. Courts scrutinize these claims carefully and will not accept a frustration argument unless:
- The triggering event was genuinely unforeseeable
- The situation is truly permanent — not temporary or recoverable
- All accommodation obligations under the Human Rights Code have been met
- ESA minimums have been paid regardless
Using frustration incorrectly exposes employers to wrongful dismissal claims, human rights complaints, and significant liability.
What To Do If This Applies to You
1/ Do not accept “frustration” at face value — if your employer uses this term to end your employment, it requires legal scrutiny before you accept any outcome.
2/ Confirm your ESA entitlements were paid — termination and severance pay still apply in most frustration scenarios. If they were not paid, that is a violation.
3/ Consider whether your disability was accommodated — if your condition qualifies as a disability, your employer had a legal duty to accommodate before invoking frustration.
4/ Get legal advice promptly — frustration of contract claims are highly fact-specific. Whether the doctrine applies — and what you are owed — depends entirely on the details of your situation.
The bottom line: Frustration of contract is a legitimate legal doctrine — but it is also one of the most misused concepts in employment law. If your employer is using it to end your employment without proper compensation, or without first fulfilling their accommodation obligations, the law may be firmly on your side.
Do not accept a frustration argument without getting independent advice first.
