Why Unionized Employees Usually Can't Sue for Wrongful Dismissal in Ontario

If you're unionized and you've been let go, it's natural to think about suing the way a non-union friend might. In most cases, that route simply isn't available to you — not because the law leaves union members unprotected, but because a different system already handles it.

For unionized employees, a collective agreement's grievance and arbitration process is generally the only route available for disputes arising out of the employment relationship, including dismissal. Understanding why unionized employees usually can't sue for wrongful dismissal in Ontario, and what protection they get instead, helps you know what to actually do if you're facing termination.

Why the Courts Generally Won't Hear the Claim

Ontario's labour relations framework is built around the idea that a collective agreement's own dispute-resolution process — grievance, and ultimately arbitration — should be the exclusive way to resolve disagreements that arise from the employment relationship it governs. When a dismissal is covered by a collective agreement, courts will generally decline to hear a wrongful dismissal claim about it and will direct the employee back to the grievance process instead.

This isn't a loophole or a technicality — it reflects a deliberate policy choice that unionized workplaces should resolve employment disputes through the process the union and employer bargained for, rather than through parallel court litigation.

What Union Members Generally Get Instead

Being covered by a collective agreement is not a worse position than being able to sue — in several ways, it's a stronger one:

• Just-cause protection. Most collective agreements require the employer to show just cause before dismissing a union member, rather than simply providing notice or pay in lieu, which is the standard for most non-union employees.
• Representation through the union. The union — not the individual employee — typically carries the grievance forward, generally without the employee having to personally retain and pay for a lawyer.
• A binding decision. If a grievance isn't resolved, it generally proceeds to arbitration before a labour arbitrator, whose decision is final and binding, with only limited grounds of appeal — similar in effect to how private arbitration awards work more broadly.

When a Unionized Employee Might Still Be Able to Go to Court

There are narrow exceptions. A dispute that isn't really about the employment relationship the collective agreement governs — for example, some claims involving conduct unrelated to the workplace, or specific rights created by other legislation — can sometimes fall outside the grievance process and proceed elsewhere. These situations are the exception rather than the rule, and figuring out whether one applies to your circumstances requires legal advice tailored to your facts.

Grievance Deadlines Are Usually Short and Strict

Collective agreements typically set out short, firm deadlines for filing a grievance after a dismissal or other disputed event. Miss the deadline in your agreement, and you may lose the ability to challenge the decision at all — much like missing a limitation period closes the door on a court claim. The specific deadline is set by your collective agreement, not by general litigation rules, so check it immediately.

What to Do If You're a Unionized Employee Facing Dismissal

• [ ] Contact your union steward or representative right away
• [ ] Record the exact date and circumstances of the dismissal
• [ ] Locate your collective agreement and check its grievance deadline
• [ ] Keep your own written notes of what was said and by whom
• [ ] Ask your union what the next steps in the grievance process look like
• [ ] Get independent legal advice if you believe your situation falls outside the collective agreement

Frequently asked questions