Contractor Insurance Requirements Ontario: WSIB, Liability & What You Need

Insurance is the foundation of a legitimate contracting business in Ontario. Without the right coverage, you can't pull permits, can't work for general contractors, can't bid on commercial jobs, and you're personally liable for every accident on every job site.

This guide covers exactly what insurance Ontario contractors need, how much it costs, and how it impacts your ability to generate revenue.

The Four Pillars of Contractor Insurance in Ontario

1. WSIB (Workplace Safety and Insurance Board)

WSIB coverage is mandatory for most Ontario construction trades. Here's what you need to know:

• Who needs it: All construction employers in Ontario. Independent operators in construction are also required to register.
• What it covers: Workplace injuries and occupational diseases for you and your workers
• Cost: Premium rates vary by trade classification (Rate Group)

Trade	WSIB Rate Group	Premium per $100 earnings
General Contracting	764	$3.50-$5.50
Electrical	707	$1.75-$3.00
Plumbing/HVAC	704	$2.25-$3.75
Roofing	762	$5.00-$6.50
Landscaping	711	$3.00-$4.50

Clearance certificates: GCs and property owners will request a WSIB clearance certificate before allowing you on site.

2. Commercial General Liability (CGL) Insurance

CGL protects against third-party claims for bodily injury and property damage caused by your work:

• Minimum coverage: $2,000,000 per occurrence (industry standard)
• Typical cost: $500-$2,500/year for small contractors
• What it covers: Damage to client property, injury to bystanders, completed operations claims
• What it DOESN'T cover: Your own injuries (that's WSIB), vehicle accidents (that's auto), professional errors (that's E&O)

3. Professional Liability / Errors & Omissions (E&O)

Required for contractors who provide design, engineering, or consulting services:

• Who needs it: Design-build contractors, engineers, architects, project managers
• Typical cost: $1,000-$5,000/year depending on scope
• What it covers: Claims arising from professional advice, design errors, or omissions

4. Commercial Auto Insurance

Required for any vehicle used for business purposes:

• Must declare commercial use — personal auto policies don't cover work use
• Tools and equipment coverage for items in the vehicle
• Typical cost: $2,000-$5,000/year per vehicle depending on use

Why Insurance = More Revenue

Many contractors see insurance as a cost. Smart contractors see it as a revenue enabler:

• Permits: Most Ontario municipalities require $2M CGL + WSIB to pull permits
• Commercial jobs: Property managers require certificates of insurance before awarding work
• GC subcontracting: General contractors won't hire uninsured subs (liability transfers to them)
• Marketing advantage: "Fully licensed, insured, and WSIB covered" is the #1 trust signal for homeowners
• Lead gen campaigns: Insurance credentials are featured in all direct mail lead generation materials

Municipal Business Licence Requirements

Most Ontario municipalities require contractor licensing. Here's what they typically need:

• Proof of $2M CGL insurance naming the municipality as additional insured
• WSIB clearance certificate (current, not expired)
• Trade-specific licences (ESA for electrical, TSSA for gas, etc.)
• Business registration (Ontario Business Registry)
• HST registration (if revenue exceeds $30,000)

Red Flags: Signs a Contractor Is Uninsured

If you're a homeowner or GC, watch for these warning signs:

1. Won't provide a certificate of insurance when asked
2. Significantly cheaper than all competitors (cutting insurance is the easiest way to undercut)
3. No WSIB clearance certificate available
4. Cash-only, no written contract
5. No business address or permanent signage

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Frequently Asked Questions

Is contractor insurance required in Ontario?

While not all insurance is legally mandated for every trade, WSIB coverage is required for most construction trades, and general liability insurance is required by most municipalities for permit work and by most clients.

How much does contractor insurance cost in Ontario?

General liability ($2M) typically costs $500-$2,500/year depending on trade and revenue. WSIB premiums range from $1.50-$6.50 per $100 of earnings depending on trade classification.

What insurance do I need to get a business licence in Ontario?

Most Ontario municipalities require proof of $2M general liability insurance and WSIB clearance certificate to issue or renew contractor business licences.

Does WSIB cover subcontractors?

If you hire subcontractors without their own WSIB coverage, you may be held liable for their premiums and any injury claims. Always verify subcontractor WSIB clearance certificates.

What happens if I work without insurance in Ontario?

Working without required insurance can result in WSIB penalties (up to 2x premiums owed), loss of business licence, inability to pull permits, personal liability for injuries, and difficulty getting paid by GCs.

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