Sick Notes vs WCB Claims in Alberta: When You Need Which (2026)

Last reviewed and updated: August 2026 by a licensed Canadian physician

Confused about whether you need a sick note or a WCB claim? Learn the difference between regular sick notes and Workers' Compensation Board claims in Alberta.


Updated August 2026, Current Alberta WCB regulations and employment standards.

Need a sick note in Alberta? MedLetter provides official physician-signed documentation for $49 with same-day delivery. No walk-in clinic visit needed — submit your request in 2 minutes and receive your note by email. Valid for employers, universities, and insurance across Alberta.


Also available: Ontario Sick Notes | BC Sick Notes | Canada-Wide Guide

Sick Notes vs WCB Claims in Alberta: When You Need Which (2026)

If you're off work due to illness or injury in Alberta, you might be confused about whether you need a regular sick note or a Workers' Compensation Board (WCB) claim. The distinction matters enormously, it affects your pay, your job protection, your medical coverage, and your legal rights. Getting it wrong can cost you thousands of dollars in lost benefits or create complications with your employer.

The answer depends on one fundamental question: did the illness or injury happen because of your job, or would it have happened regardless of where you work?

The Key Distinction: Work-Related vs. Non-Work-Related

| Factor | Regular Sick Note (MedLetter) | WCB Claim |
|--------|------------------------------|-----------|
| Cause | Non-work-related illness/injury | Work-caused illness/injury |
| Examples | Cold, flu, food poisoning, migraine | Fall on job site, repetitive strain, chemical exposure |
| Cost to you | $39.99 (MedLetter) | $0 (WCB covers all costs) |
| Income replacement | Unpaid leave (unless employer provides sick pay) | 90% of net earnings from WCB |
| Documentation | Sick note from any licensed physician | WCB Physician's First Report + Worker's Report |
| Processing time | Same day | 2-6 weeks for claim decision |
| Job protection | Alberta Employment Standards (27 weeks) | WCB Act (until fit to return) |
| Who pays medical | Alberta Health (AHCIP) | WCB pays all related treatment |

When You Need a Regular Sick Note (MedLetter Can Help)

A standard sick note from a CPSA-licensed physician is appropriate when your illness or injury is NOT caused by your work:

  • Common cold, flu, or stomach bug, caught anywhere, not work-specific

  • Food poisoning, from a restaurant, home cooking, or non-workplace food

  • Migraine or headache, not caused by workplace conditions

  • Menstrual cramps, severe enough to miss work

  • Minor injuries off the job, weekend sports injury, household accident

  • Acute stress or burnout, general life stress, not a specific traumatic work event

  • Child's illness, needing time off to care for a sick child


MedLetter provides same-day sick notes for all of these situations, $39.99, no clinic visit required.

When You Need a WCB Claim (MedLetter CANNOT Help)

A WCB claim is required when your illness or injury is directly caused by your work duties or workplace conditions:

  • Physical injuries on the job, falls, cuts, crush injuries, equipment accidents

  • Repetitive strain injuries, carpal tunnel, tendinitis from work tasks

  • Occupational diseases, asbestosis, hearing loss from workplace noise, chemical exposure

  • Workplace violence, assault by a coworker, client, or member of the public

  • Motor vehicle accidents during work, driving for work purposes

  • Psychological injuries from specific traumatic work events, witnessing a death, workplace disaster


For WCB claims, you must:
1. Report the injury to your employer within 72 hours (sooner is better)
2. See a physician who will file a WCB Physician's First Report (Form C)
3. File a Worker's Report of Injury (Form W) with WCB Alberta
4. Your employer files an Employer's Report (Form E)

MedLetter does not process WCB claims. WCB requires an in-person physician examination and specific WCB forms that must be filed directly with the Board.

The Grey Areas: Common Confusion Points

Burnout & Workplace Stress

This is the most common grey area. The distinction:

  • General burnout (long hours, heavy workload, difficult boss) → Regular sick note appropriate. MedLetter can help.

  • Specific traumatic event (witnessing a workplace death, workplace violence, sexual harassment) → May qualify as WCB psychological injury claim.


If you're unsure, start with a MedLetter sick note for immediate documentation. You can always file a WCB claim later if you determine the cause is work-specific.

Getting Sick at Work

Just because you got sick while AT work doesn't make it a WCB claim:

  • Catching a cold from a coworker → Regular sick note (not work-caused, just happened at work)

  • Developing symptoms from chemical exposure at work → WCB claim (work-caused)

  • Food poisoning from the work cafeteria → Could be either (consult WCB)


Aggravation of Pre-Existing Conditions

If work duties aggravate a pre-existing condition (e.g., lifting at work worsens a previous back injury), this MAY qualify for WCB. Consult with WCB directly for these situations.

Decision Flowchart

Ask yourself these questions:

1. Was I injured or made ill BY my work? → If YES, likely WCB. If NO, continue.
2. Would this have happened even if I didn't work there? → If YES, regular sick note.
3. Did a specific work event cause this? → If YES (traumatic event, accident), likely WCB.
4. Am I generally unwell and it's affecting my work? → Regular sick note.

Financial Comparison

Understanding the financial implications helps you make the right choice:

| Scenario | Regular Sick Leave | WCB Claim |
|----------|-------------------|-----------|
| Income during absence | $0 (unpaid) unless employer provides sick pay | 90% of net earnings paid by WCB |
| Medical costs | Covered by AHCIP (physician visits) | ALL treatment costs covered by WCB |
| Physiotherapy | You pay (unless extended health benefits) | WCB pays 100% |
| Prescriptions | You pay (unless drug plan) | WCB pays 100% |
| Documentation cost | $39.99 (MedLetter) | $0 (WCB covers) |
| Return-to-work support | None (unless employer program) | WCB provides modified duties program |

If your injury IS work-related, filing a WCB claim is almost always financially advantageous. Don't use a regular sick note to avoid "the hassle" of WCB, you'd be leaving thousands of dollars in benefits on the table.

Frequently Asked Questions

Can I use a MedLetter sick note while my WCB claim is being processed?
Yes. WCB claims take 2-6 weeks to process. If you need immediate documentation for your employer while waiting for a WCB decision, a MedLetter sick note can bridge the gap. However, note that if WCB approves your claim, the absence will be reclassified as WCB leave.

My employer says to "just get a sick note" instead of filing WCB. Is that right?
No. If your injury is work-related, your employer is legally required to report it to WCB. Some employers discourage WCB claims to keep their premiums low, this is illegal. File your claim directly with WCB Alberta if needed.

Can I get a sick note for the day of a workplace injury?
For the initial day of injury, your employer should allow you to seek medical treatment without penalty. The treating physician will file WCB paperwork. you should still consider getting a separate sick note for a work injury.

What if WCB denies my claim?
If WCB denies your claim (determines it's not work-related), you can appeal the decision. In the meantime, you may need a regular sick note to document your absence. MedLetter can provide this.

I hurt my back at work but it's minor, do I still need WCB?
If the injury was caused by work duties, it should be reported to WCB regardless of severity. Even minor injuries can worsen, and having a WCB file protects you if you need treatment later.

Summary: Quick Reference

| Your Situation | What You Need | Where to Go |
|---------------|---------------|-------------|
| Cold, flu, stomach bug | Regular sick note | MedLetter ($39.99) |
| Food poisoning (non-work food) | Regular sick note | MedLetter ($39.99) |
| Migraine, headache | Regular sick note | MedLetter ($39.99) |
| General burnout/stress | Regular sick note | MedLetter ($39.99) |
| Fell at work | WCB claim | Your physician + WCB Alberta |
| Repetitive strain from work | WCB claim | Your physician + WCB Alberta |
| Chemical exposure at work | WCB claim | Your physician + WCB Alberta |
| Workplace violence | WCB claim | Your physician + WCB Alberta |

$39.99 flat fee for non-work-related illness. Same-day delivery. Licensed Alberta physician.

Get Your Sick Note →

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Last verified: August 2026. Information reflects current WCB Alberta regulations and Alberta Employment Standards Code. For WCB claim assistance, contact WCB Alberta directly at 1-866-922-9221.