Published on: October 21, 2025
The Shock of Losing Your Job While Unwell
Imagine being on sick leave — recovering from surgery, dealing with burnout, or following your doctor’s advice to rest — and then receiving an email or letter saying you’ve been let go. It’s a situation that leaves many Ontario workers stunned and confused. You’re already managing your health, and suddenly, your financial stability is pulled out from under you.
In Ontario, this kind of termination raises an important question: can your employer legally fire you while you’re on sick leave? The short answer is sometimes — but not always. While there are limited situations where an employer may lawfully end someone’s employment, firing an employee because they took or requested sick leave is against the law.
This blog breaks down what Ontario law says about being terminated while on medical leave, how to tell if your dismissal was wrongful, and what steps you can take to protect your rights and recover fair compensation.
Read More:
Constructive Dismissal in Ontario: When Employers’ Actions Force a Resignation
Termination Clauses in Employment Contracts: How to Protect Your Common-Law Rights
Severance Pay for Contract Employees: Do You Still Qualify?
Can You Be Fired While on Sick Leave in Ontario?
Under Ontario law, being on sick leave doesn’t give you complete immunity from termination — but it does protect you from being fired because of your illness or medical leave. This distinction is crucial.
Your employer can technically end your employment for legitimate, unrelated reasons — for example, company restructuring, downsizing, or closure. However, if the real reason for your dismissal is tied to your medical condition or the fact that you took time off work to recover, that can amount to wrongful dismissal or even a violation of the Ontario Human Rights Code.
The Employment Standards Act (ESA) guarantees up to three unpaid sick leave days per year for eligible employees, though many workplaces offer longer leaves or disability benefits through policies or contracts. During any approved sick leave, your job is considered “protected.” That means your employer must keep your position (or an equivalent one) available for you when you’re ready to return — unless there’s a legitimate business reason that makes that impossible.
In short:
You can be let go for valid business reasons.
You cannot be fired for taking or needing sick leave.
If you were dismissed shortly after going on leave, or your employer’s explanation doesn’t add up, it’s worth taking a closer look — because the timing itself can be a red flag that the termination wasn’t lawful.
Understanding Your Rights under Ontario Law
Ontario’s Employment Standards Act (ESA) and the Human Rights Code work together to protect employees who need time off for health reasons. Under the ESA, eligible employees are entitled to job-protected sick leave — meaning you can take time away from work to recover without fear of losing your job because of that leave.
Here’s what that really means in practice:
• You have the right to take unpaid sick leave if you’re ill, injured, or attending medical appointments.
• Your employer cannot penalize, demote, or dismiss you for exercising this right.
• You may be asked for reasonable medical documentation (like a doctor’s note), but your employer cannot demand unnecessary personal details about your diagnosis.
• When your leave ends, you have the right to return to your position or a comparable one with the same pay and benefits.
Beyond the ESA, the Ontario Human Rights Code protects workers with disabilities — whether temporary or long-term. Employers have a legal duty to accommodate employees’ medical needs up to the point of “undue hardship.” That might mean adjusting your duties, offering flexible hours, or providing a gradual return-to-work plan instead of termination.
If your employer chose to end your employment instead of exploring these options, that may amount to discrimination or constructive dismissal. Understanding these rights is the first step to recognizing when your firing may have crossed the legal line.
Common Employer Excuses (and How to See Through Them)
When an employee is fired while on sick leave, employers rarely admit it was because of the leave itself. Instead, they often give explanations that sound legitimate on paper — but may not hold up under closer examination.
Here are some of the most common excuses employees in Ontario hear:
• We had to downsize or restructure.
This might be valid if it’s part of a broad layoff affecting multiple roles. But if you’re the only one affected — and you happen to be on sick leave — it’s worth questioning whether the reason is genuine or just a cover.
• You were away too long; we needed to fill the position.
Under Ontario law, the length of your leave isn’t enough reason to terminate you. Employers must first show they tried to accommodate your medical situation and couldn’t do so without serious business hardship.
• Your performance wasn’t up to standard.
If you had no prior warnings or written performance concerns before your medical leave, this explanation can be suspicious — especially if it appears suddenly after you took time off.
• You didn’t provide enough medical proof.
While employers can request reasonable documentation, they cannot demand constant or invasive medical updates. Firing someone for “lack of proof” without first asking properly can violate both the Employment Standards Act and Human Rights Code.
If any of these reasons sound familiar, you might be dealing with a wrongful or discriminatory dismissal. Even if your employer claims the decision was “business-related,” the timing, pattern, and lack of effort to accommodate often reveal the real motive — and that’s where legal advice can make a significant difference.
What to Do If You Were Fired During Sick Leave
If you’ve been terminated while on medical leave, it’s natural to feel overwhelmed — but what you do next can make all the difference in protecting your rights and financial security.
Here’s a clear, step-by-step guide to follow:
- Stay calm and gather everything in writing.
Save your termination letter, emails, text messages, and any doctor’s notes you’ve provided. These documents can show whether your firing was truly for business reasons or linked to your illness. - Don’t sign anything immediately.
Employers may ask you to sign a release or severance agreement right away. Doing so without legal review can mean giving up your right to claim additional severance or damages for wrongful dismissal. - Write down the timeline.
Note when you went on leave, what communications took place, and when the termination occurred. A clear record helps a lawyer assess if the dismissal was connected to your medical leave. - Consult an employment lawyer before taking your next step.
A lawyer can review your case to see if your employer violated the Employment Standards Act, the Human Rights Code, or your common-law severance rights. - Explore possible remedies.
Depending on your case, you might be entitled to:
o Severance pay or termination pay under the ESA
o Common-law compensation for wrongful dismissal
o Human rights damages if discrimination was involved
Even if your employer insists the termination was legal, you may still have strong grounds for a claim. Acting quickly and getting proper legal advice ensures you don’t lose your entitlement to fair compensation or reinstatement.
Before You Sign Anything, Know Your Rights
Being let go while you’re unwell is one of the most stressful experiences an employee can face. But remember — just because your employer says the termination is legal doesn’t mean it actually is. You have rights under Ontario law that protect you from being punished or dismissed for taking time off to recover.
Before you sign a severance agreement or accept your employer’s explanation, take a moment to get clarity. An experienced employment lawyer can review your situation, identify whether your dismissal was wrongful or discriminatory, and help you pursue the compensation you’re owed.
At Taman Singh Law, we regularly help Ontario employees who were dismissed while on sick leave understand their options and rebuild their confidence after unfair treatment. Our approach is professional, empathetic, and focused on getting you the fair outcome you deserve — so you can focus on your health and peace of mind.
If you’ve been terminated during or after medical leave, reach out before signing anything. A short consultation could make all the difference between accepting less than you deserve and standing up for your rights.
???? Email: taman@rzcdlaw.com
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About The Author
Taman Singh is an employment lawyer with a focused practice in wrongful and severance negotiations. He is dedicated to advocating for employees and ensuring they receive the compensation they are rightfully owed. With a sharp understanding of Ontario employment law and a results-driven approach,Taman consistently helps clients navigate complex workplace disputes and maximise their severance packages.
