What WSIB Coverage Means and Why You Should Check Before Hiring
·6 min read
L
Lisa NguyenGeneral Contractor & Renovation Specialist
Published March 21, 2026
Key Takeaway
WSIB explained for Ontario homeowners. Why contractor WSIB coverage protects you, how to verify it at wsib.ca, and what happens if they don't have it.
If a contractor's worker falls off your roof and breaks their back, who pays? If you hired someone without WSIB coverage, the answer might be you.
WSIB (Workplace Safety and Insurance Board) is Ontario's workers' compensation system. It protects workers who are injured on the job — and it protects homeowners from being sued for those injuries. Understanding it takes 5 minutes. Not understanding it can cost you hundreds of thousands.
What Is WSIB?
The Workplace Safety and Insurance Board is an Ontario government agency that provides:
Insurance for workers injured on the job (medical costs, lost wages, rehabilitation)
Liability protection for employers (and property owners) against injury lawsuits
A no-fault system — workers get compensated without having to prove negligence
Most Ontario employers in construction are required to register with WSIB and pay premiums. The premiums are based on their industry risk classification and payroll.
Why It Matters When You Hire a Contractor
Here's the scenario most homeowners don't think about:
You hire a contractor to fix your roof
Their worker falls and gets seriously injured
If the contractor has WSIB coverage → WSIB pays the worker's medical costs and lost wages. You're protected.
If the contractor does NOT have WSIB → the injured worker can sue YOU as the property owner
This is not theoretical. Ontario courts have held property owners liable when contractors working on their property lacked proper coverage.
The Workplace Safety and Insurance Act specifically states that if a worker is injured and their employer doesn't have WSIB coverage, the worker retains the right to sue. Since the work is happening on YOUR property, you can be named in that lawsuit.
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Lisa Nguyen is a licensed general contractor and LEED Green Associate with 14 years of experience managing residential renovation and remodeling projects. She brings expertise in kitchen and bathroom remodels, basement finishing, and sustainable building practices.
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Text us what you need done. We’ll connect you with a contractor who’ll call you with an actual number.
Enter the contractor's WSIB account number (on the certificate)
Confirm the status shows "Clearance Granted"
Check the date — must be within 90 days
What the Certificate Tells You
Field
What to Check
Account Status
Must say "Clearance Granted"
Date Issued
Must be within last 90 days
Business Name
Must match the contractor you're hiring
Account Number
Use this to verify online
If the status says "Clearance Not Granted" — the contractor has unpaid premiums or an active claim issue. Do not hire them until this is resolved.
Sole Proprietor Exemptions
Some sole proprietors (one-person operations with no employees) may be exempt from mandatory WSIB registration. However:
They can still voluntarily register for their own coverage
If they hire subcontractors, those subs need WSIB coverage
The exemption applies ONLY if they have zero employees and zero subcontractors
What to do: If a contractor says they're exempt, ask for proof of independent operator status from WSIB. Don't take their word for it. A legitimate sole prop will have documentation.
What Happens If a Worker Is Injured Without WSIB
Scenario 1: Contractor Has WSIB ✅
Worker files a WSIB claim
WSIB covers medical, lost wages, rehabilitation
Homeowner is protected — no lawsuit
System works as designed
Scenario 2: Contractor Does NOT Have WSIB ❌
Worker has no WSIB claim to file
Worker can sue the contractor AND the property owner
Homeowner's home insurance MAY cover some liability — but many policies exclude contractor-related injuries
Potential liability: $100,000 to $1,000,000+ depending on injury severity
Even if you "win" the lawsuit, legal fees can reach $20,000-$50,000
Scenario 3: Contractor Is Exempt (Sole Prop) ⚠️
No WSIB coverage for the contractor themselves
If THEY get injured on your property, the situation is legally complex
Their own health insurance or disability coverage applies
They generally cannot sue you (they accepted the risk as an independent operator)
But if the facts suggest an employment relationship existed, the analysis changes
WSIB and Your Home Insurance
Many homeowners assume their home insurance covers contractor injuries. This is often wrong.
Most standard Ontario homeowner policies cover:
Guests who are injured on your property (slip and fall, etc.)
Property damage from covered events
They typically do NOT cover:
Injuries to workers performing contracted work
Liability arising from uninsured contractor operations
Claims where you "should have known" the contractor was uninsured
What to do: Call your home insurance broker and ask: "Does my policy cover me if an uninsured contractor's worker is injured on my property?" Get the answer in writing.
WSIB Costs for Contractors
Industry Group
Premium Rate (per $100 payroll)
Residential construction
$3.50 - $6.00
Roofing
$5.00 - $9.00
Electrical
$2.50 - $4.50
Plumbing/HVAC
$3.00 - $5.00
Landscaping
$3.00 - $5.50
For a contractor paying $80,000/year in wages: WSIB premiums = roughly $2,800-$7,200/year. This is a normal cost of doing business — any contractor who avoids it is cutting a corner that could destroy your finances.
The 2-Minute Check That Could Save You Everything
Ask for the WSIB clearance certificate (30 seconds)
Verify at wsib.ca (60 seconds)
Confirm it's current and matches the business name (30 seconds)
Total time: 2 minutes. Potential liability avoided: $100,000+.
Is WSIB mandatory for all Ontario contractors?
For construction employers with one or more workers — yes. Sole proprietors with zero employees may be exempt, but can register voluntarily.
Can I check WSIB coverage online for free?
Yes. Go to wsib.ca/en/businesses/clearance-certificates and enter the contractor's account number. It's free and instant.
What if the contractor says they have WSIB but won't show me proof?
That's a red flag. A registered contractor can generate a clearance certificate in minutes. If they won't provide one, don't hire them.
Does WSIB cover the homeowner?
WSIB protects the homeowner indirectly. When a contractor has WSIB, their injured workers file claims through WSIB instead of suing the property owner.
How much does WSIB cost contractors?
Premiums range from $2.50-$9.00 per $100 of payroll, depending on the trade. For most contractors, it's $2,800-$7,200/year — a normal business expense.
Last updated: March 2026. WSIB premium rates are approximate and subject to change.