Can Your Ontario Employer Fire You for Calling in Sick?
The short answer: No, not for legitimate illness. Ontario's Employment Standards Act (ESA) and the Ontario Human Rights Code provide strong protections for employees who need time off due to illness.
Your Legal Protections in Ontario
Under the Ontario ESA, employees are entitled to:
- 3 unpaid sick days per year (job-protected)
- No medical note required for these days (Working for Workers Act, 2022)
- Job-protected leave — your employer cannot terminate you for using these entitlements
Under the Ontario Human Rights Code, disability (including temporary illness) is a protected ground. Terminating someone because they are sick can constitute discrimination.
When Termination COULD Be Lawful
While you can't be fired simply for being sick, there are limited circumstances:
1. Excessive absenteeism — A pattern of unexplained absences beyond your entitlements, after progressive discipline
2. Frustration of contract — If illness makes it impossible to perform your job for an extended period
3. Failure to provide documentation — If your employer has a legitimate policy requiring a sick note for extended absences
4. Dishonesty — If you weren't actually sick and your employer can prove it
5. Undue hardship — If accommodating your absence causes significant operational harm (high threshold)
The Working for Workers Act Protection
Since 2022, Ontario employers cannot require a medical note for the 3 ESA-protected sick days. This means:
- No doctor's note for days 1-3
- No cost to the employee for basic sick leave
- Employers who demand notes for these days are violating the ESA
What to Do If You're Threatened
1. Document everything — Save emails, texts, and notes about conversations
2. Get a sick note — For absences beyond 3 days, documentation protects you
3. Know your rights — Review the ESA and your employment contract
4. File a complaint — Contact the Ontario Ministry of Labour or the HRTO
How MedLetter Helps
If your employer is pressuring you about sick days beyond your 3 ESA-protected days, having proper medical documentation is your best protection. MedLetter provides physician-reviewed sick notes same day.
What Employers Need to Know
Canadian employment law balances employer interests with employee privacy:
- Employers can request confirmation of illness but not specific diagnoses
- The note should state: dates of absence, that the employee was/is unfit for duties, and expected return date
- Employers cannot contact the physician directly without employee consent
- Requiring a note for every single-day absence may constitute harassment in some jurisdictions
Cost Considerations for Employers
- Walk-in clinic notes cost employees $20-50 and require 2-4 hours away from work
- Virtual sick notes reduce time away from work to minutes
- Some employers reimburse sick note costs as a best practice
- The cost of replacing a sick employee for a day far exceeds the cost of documentation
Related: [Sick Note Ontario — Complete City Guide](/sick-note-ontario) | [Ontario Sick Note Cost 2026](/blog/ontario-sick-note-cost-2026)
Frequently Asked Questions
Can I get a sick note online in Ontario?
Yes. CPSO-licensed physicians can assess patients through virtual consultations and issue legally valid sick notes accepted by all Ontario employers.
How much does an online sick note cost in Ontario?
MedLetter charges a flat $49 for a sick note with same-day delivery. This includes the physician assessment and official documentation.
Will my Ontario employer accept an online sick note?
Yes. The College of Physicians and Surgeons of Ontario recognizes virtual care. Online sick notes are legally equivalent to in-person notes.
How long does it take to get a sick note from MedLetter?
Most sick notes are delivered within 2-6 hours of submission. Same-day delivery is standard.