Do I need business insurance if I already have WSIB in Ontario?

If you’re an Ontario business owner and you assume WSIB is “business insurance,” it isn’t.

What WSIB is: It’s a provincial, no‑fault workplace injury/illness program for eligible workers — and it protects employers from lawsuits by those workers for those specific injuries.  

What WSIB isn’t: It isn’t insurance for your building, inventory, vehicles, data, advice, products, or customers who get hurt on your premises. You almost certainly need separate commercial policies to cover those risks.  

Depending on what type of business you have, here’s what you need to know about insurance coverages to keep your assets, workers, and customers protected.   

What is the Workplace Safety and Insurance Board (WSIB)?

Ontario’s Workplace Safety and Insurance Board (WSIB) administers a no‑fault workplace insurance system: employers pay WSIB premiums; eligible injured or ill workers receive wage‑loss benefits, medical care, and return‑to‑work support.  

In exchange, workers give up the right to sue their employer for workplace injury. Employers get legal protection — but only against lawsuits from their own workers about workplace injuries covered by the system.  

Who must register? Coverage is mandatory for industries listed in regulation under Schedule 1 (Part I) and Schedule 2 of the Workplace Safety and Insurance Act framework; some sectors are not mandatory and can apply by choice.  

Who isn’t automatically covered? Owners — sole proprietors, partners, executive officers — are not automatically covered. They can choose to apply for WSIB Optional Insurance, which is not commercial business insurance but a WSIB‑specific program that provides workplace injury coverage to individuals who are not otherwise eligible.  

It gives the owner WSIB worker‑level benefits if they get hurt at work, but it does not replace or overlap with commercial liability or property insurance. 

Where WSIB stops: The coverage boundary  

Inside WSIB’s fence: Work‑related injuries/illnesses to covered workers; benefits (health care, wage loss), and employer legal immunity — but only for those worker injury claims.  

Outside WSIB’s fence: Everything not tied to that definition. That includes property damage, third‑party injuries (public/customers), auto accidents, professional errors, cyber incidents, theft/fraud, product defects, and lost income from disasters. Those require commercial insurance.  

Related: Certificate of insurance (COI): What is it and do you need one? 

What is business insurance?

Business insurance protects your company from unexpected risks like lawsuits, property damage, and operational disruptions. Whether you’re a new start-up or a long‑established business, the right coverage helps safeguard your operations.

Below are the 10 core commercial insurance policies most Ontario businesses need in addition to WSIB. This is your complete baseline list — industry sections further down will reference what’s unique beyond these.

1. Commercial General Liability (CGL): Covers lawsuits and claims from third parties (customers, visitors) for bodily injury or property damage, plus personal/advertising injury and some tenants’ legal liability.
2. Professional Liability / Errors and Omissions (E&O): Protects against allegations of negligence, errors, omissions in the delivery of professional services (consulting, design, tech services, engineering, accounting).
3. Product liability: Covers injury or damage allegedly caused by your product (manufacturers, importers, private‑label sellers).
4. Cyber liability: Pays for breach response (legal, notification, PR), data restoration, cyber business interruption, and liabilities to impacted individuals/partners after attacks like ransomware.
5. Commercial property: Covers your building, equipment, inventory, tools, electronics, furnishings, etc., against perils like fire, explosion, water damage, theft, vandalism.
6. Business Interruption (BI): If a covered property loss shuts down operations, BI replaces lost income and extra expenses to keep your business going.
7. Commercial auto insurance: Covers vehicles used for business — including liability for accidents, collision/comprehensive, and optional endorsements. Also covers non‑owned auto, if staff use their own vehicles for business errands.
8. Umbrella / excess liability: Increases liability limits above your commercial general liability (CGL), auto, and sometimes E&O — often required in municipal and large commercial contracts.
9. Crime / burglary (commercial crime): Covers theft, burglary, robbery, employee dishonesty/fidelity losses, and (via endorsement) social engineering fraud.
10. Tools and equipment / contractors’ equipment insurance: Covers mobile equipment, tools, and machinery used off-site (for trades, construction, landscapers, installers, technicians).

Related: What does snow removal business insurance in Canada really cover — and how much does it cost? 

Industry‑specific coverage for your business

Every Ontario business has different risks depending on how you operate, who you serve, and what contracts you sign. Here are the industry-specific coverages that go beyond the baseline list above.

Construction and skilled trades

Construction remains one of Canada’s highest‑risk industries — in 2024 alone, over 35,000 construction workers were injured on the job.

Here’s some unique or elevated coverages for most contractors need day‑to‑day: 

• Builders risk/course of construction: Protects the project itself — materials, supplies, and work in progress — from losses like fire, water damage, vandalism, and severe weather during construction.
• Installation floater: Covers materials you’re transporting to a jobsite or installing before the job is complete (e.g., HVAC units, windows, custom cabinetry) — protection that standard property or tools policies don’t fully address.
• Wrap‑up liability (project‑specific liability program): Often required on larger commercial or municipal builds. Covers all contractors/subtrades under one project‑wide liability policy rather than relying on individual CGL policies.
• Contractor’s pollution liability: Covers exposures related to mould, asbestos, fuel spills, contaminated soil, and other environmental hazards common on construction sites.
• Equipment breakdown (large machinery): Distinct from “tools and equipment”; this coverage applies to heavy machinery like excavators, skid steers, compressors, and lift equipment.

Learn more: 4 types of insurance you need as a general contractor 

Consultants and professional services (marketing, HR, IT, accounting, engineering, legal support)

Your biggest exposure isn’t physical risk — it’s financial loss caused by advice, data handling, or service delivery. Make sure to include:

• Higher‑limit professional liability (E&O): While E&O is in the master list, consultants usually need significantly higher limits, contractual endorsements, and coverage for subcontracted work and intellectual property exposures.
• Specialized cyber enhancements: Social engineering fraud (invoice fraud, credential harvesting), cybercrime and funds‑transfer fraud, and system failure.
• Media liability (if you produce content): Covers defamation, copyright infringement, and advertising injury beyond general CGL parameters.

Read more: I’m a freelancer – do I need freelance insurance? 

Retail, restaurants and hospitality

Customer traffic, food handling, and equipment‑dependent operations mean your biggest risks are spoilage, shutdowns, and cash‑related losses.

• Food‑borne illness and spoilage: Covers contamination, mass disposal events, and food loss from equipment breakdown or extended power outages.
• Refrigeration and equipment breakdown: Protection for the appliances your business depends on whether you have freezers, coolers, ovens, heat‑and‑hold units.
• Enhanced product liability: Important if you serve food, sell consumables, or offer private‑label items.
• Cash and POS fraud protection: Extra crime coverage for safe burglary, till theft, staff skimming, or POS manipulation.

Learn more: Insuring your summer business, from food trucks to ice cream stands

Tech, SaaS, startups and digital‑first businesses

Your business is built on data, uptime, intellectual property, and contracts. Even small startups carry contractual liability when they sign service level agreements (SLAs).

What your typical insurance setup should include outside of the basic coverages above:

• SLA liability coverage: Protects you if missed uptime or performance guarantees trigger penalties, credits, or contract disputes.
• IP infringement protection: Especially important for SaaS, AI, martech, or any product that creates or processes content or code.
• Digital asset and data restoration: Covers corrupted or destroyed digital assets (not just data stolen in a breach).
• Equipment breakdown for critical tech hardware: For companies running servers, networking gear, or temperature‑controlled server rooms.

How to choose the right insurance for your business

Choosing the right insurance isn’t about buying everything — it’s about matching protection to how your business actually operates.  

Here’s a streamlined way to figure out what you need.

1. Understand your real risks

Think about how you work, who you work with, and what would shut your business down if it disappeared. Ask yourself:

• Who could be injured or impacted by what you do? Clients, customers, subcontractors, and the public.  
• What assets can’t you operate without? Vehicles, tools, inventory, equipment, computers, and leased space.
• What information do you handle? Customer data, payment info, confidential files.
• What promises do you make in contracts? Many leases and request for proposals (RFP) require CGL limits or proof of specific coverage.

A quick rule of thumb: If losing something would cost you money, time, or reputation — insure it.

2. Talk to a broker who knows your industry

Commercial insurance is complex, and many gaps only appear when something goes wrong. A broker helps translate your operations into proper coverage. A good insurance broker will:

• Identify exposures WSIB doesn’t cover (customer injuries, property damage, cyber loss).  
• Tell you what insurance limits your industry usually requires.
• Check if your contracts require specific policies or minimums.
• Explain which add‑ons you need — and which you don’t.
• Help you compare multiple insurers for price and coverage, not just cost.

Ask them:

• “If my business shuts down for a week, what covers the lost income?”
• “If a subcontractor makes a mistake, am I liable?”
• “If customer data is stolen, what responds?”

A broker’s job is to make sure you don’t discover coverage gaps after a loss.

3. Bundle coverage for simplicity (and often savings)

Bundling policies with one insurer can lower your premiums and avoid gaps between coverages. Bundling also means fewer insurers, simpler claims, and stronger coordination between policies.

4. Don’t skimp on commercial insurance

As a summary, WSIB covers:

• Workplace injuries/illnesses
• Medical care and wage‑loss benefits
• Employer immunity from worker injury lawsuits

Commercial insurance covers:  

• Your building, equipment, vehicles
• Customer injuries
• Contract disputes
• Cyber attacks
• Product failures
• Theft/fraud
• Lost income if you’re forced to close  

5. Revisit your coverage every year

Business needs evolve quickly, including:  

• New hires
• New equipment
• New locations
• More client data
• Larger contracts
• New services (deliveries, consulting, digital work)

Any of these can create exposures your old policy doesn’t cover.

Reviewing annually ensures your coverage grows with your business, not behind it. This process gives Ontario businesses the full protection WSIB cannot provide — keeping both your workers and your business safe.

Read next: Does your home-based business need a home-insurance add-on or commercial property insurance?