Being fired while on medical leave in Ontario can feel like losing the floor beneath you. One day you are trying to recover, follow your doctor’s restrictions, and manage bills. The next day you are looking at a termination letter, a severance deadline, and questions about benefits or disability insurance.
The most important point is this: termination during medical leave is not automatically legal or illegal. The answer depends on why the employer acted, what medical information was available, whether accommodation was required, what leave rights applied, and whether the severance package reflects your full entitlements.
Quick answer: what should you check first?
If you were fired while on medical leave, check four things right away:
- The reason and timing. Did termination happen soon after you requested leave, provided restrictions, asked for accommodation, or disclosed a disability?
- Your leave rights. Were you on ESA sick leave, long-term illness leave, family medical leave, or another protected leave?
- Accommodation history. Did the employer explore modified duties, gradual return, schedule changes, remote work, or other reasonable options before ending the job?
- Your package and benefits. Does the offer continue wages, benefits, bonus, commissions, pension, STD, LTD, and other compensation long enough?
Do not treat a short signing deadline as the real legal deadline. Employers often ask for a quick signature, but your actual rights may be much broader than the first offer suggests.
Medical leave can involve more than one law
Several legal frameworks can apply at once.
Ontario’s Employment Standards Act provides certain job-protected leaves. For example, Ontario’s guide to sick leave explains that most eligible employees can take unpaid, job-protected leave for personal illness, injury, or medical emergency. Ontario also introduced long-term illness leave, which can provide unpaid, job-protected leave for eligible employees dealing with a serious medical condition.
Human rights law is separate. The Ontario Human Rights Commission explains the duty to accommodate disability-related needs to the point of undue hardship. That duty can apply even when an ESA leave is not the whole answer.
Employment contract and common-law rights also matter. Even if the employer says the termination is “without cause,” you may still be owed reasonable notice or pay in lieu of notice. For a broader overview, see UL Lawyers’ guide to wrongful dismissal in Ontario and our employment law services.
When firing during medical leave may be legally risky
A termination can raise red flags when:
- the employer fired you shortly after receiving a doctor’s note;
- HR asked intrusive medical questions and then ended your employment;
- you requested modified duties or a gradual return and the employer ignored the request;
- the employer said your restrictions were inconvenient or disruptive;
- your benefits were cut off while a disability claim was pending;
- your role was eliminated but similar work continued; or
- the severance offer treats you as if you were fully healthy and immediately employable.
These facts do not automatically prove discrimination or wrongful dismissal, but they are important. The closer the termination is to the medical leave or accommodation request, the more carefully the timeline should be reviewed.
Accommodation does not mean an employer must do the impossible
The duty to accommodate is powerful, but it is not unlimited. An employee usually needs to provide enough medical information to confirm restrictions, expected duration where known, and functional limits. The employer does not usually need a full diagnosis, but it does need enough information to understand what accommodation is being requested.
Reasonable accommodation might include:
- temporary modified duties;
- reduced hours or a gradual return-to-work plan;
- schedule changes for treatment appointments;
- remote or hybrid work where the job allows it;
- assistive devices or ergonomic changes;
- a different reporting process during recovery; or
- short extensions of leave supported by medical evidence.
The employer can ask for clarification and can refuse an accommodation that creates undue hardship. But inconvenience, impatience, or a preference to replace the worker is not the same as undue hardship.
What about frustration of contract?
Employers sometimes argue that a long medical absence has “frustrated” the employment contract. That means the employee is medically unable to return to work for the foreseeable future, making the employment relationship impossible to continue.
This is a fact-specific argument. It should not be used casually. A temporary leave, an uncertain prognosis, or a need for more medical information is not always enough. If the employer relies on frustration, the medical evidence, benefit-plan history, accommodation steps, and timing all need careful review.
This issue often overlaps with short-term disability or long-term disability benefits. If your employer ends employment while an STD or LTD claim is active, ask how benefits will continue and whether the insurer is taking a different position about your ability to work. UL Lawyers’ long-term disability services and short-term disability services may be relevant if the job loss and benefit denial are connected.
Do not sign before checking these documents
Before signing a release, gather:
| Document | Why it matters |
|---|---|
| Termination letter and severance offer | Shows the employer’s stated reason, deadline, and proposed compensation. |
| Employment contract and policy documents | May contain termination, benefit, bonus, and leave language. |
| Medical notes and restrictions | Helps assess accommodation and timing. |
| Emails or texts with HR/managers | Shows what the employer knew and when. |
| STD/LTD, benefits, and insurance correspondence | Reveals whether income-replacement or coverage issues are at risk. |
| Pay stubs, T4s, bonus/commission records | Helps calculate compensation beyond base salary. |
A severance package may need to account for salary, benefits, bonus, commissions, pension, car allowance, disability coverage, and the difficulty of finding comparable work while medically restricted. If the offer only covers the ESA minimums, it may be far below the full value of the claim.
Practical next steps
If this just happened:
- Ask for the termination letter, severance offer, ROE, and benefit-continuation details in writing.
- Do not sign a release until you understand its effect on employment, human-rights, and benefit claims.
- Keep your medical appointments and follow treatment recommendations.
- Save all messages about leave, restrictions, accommodation, benefits, and termination.
- Write a short timeline while events are fresh.
- Get legal advice before the employer’s offer deadline if possible.
UL Lawyers can review the termination package, accommodation history, medical-leave timeline, and any STD/LTD issues together. That combined review is important because a case like this is rarely just “employment” or just “disability”; it is often both.
If you were fired while on medical leave in Ontario, contact UL Lawyers for a free consultation before signing away rights or assuming the employer’s first offer is final.