Can My Employer Fire Me for Calling in Sick in Ontario? (2026)
Ontario's ESA provides strong protections against termination for legitimate illness. Here's what you need to know about your rights.
## 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.
**Get a sick note from a CPSO-registered physician — [Start here](/get-started/sick_note)**