Business insurance requirements for small businesses in Ontario

Business insurance requirements in Ontario come from more than one direction: some coverage is mandated by law, some is required by a landlord or client contract, and some is simply necessary given the real risks of running a business, even without a formal requirement attached. Sorting out which is which helps a new business owner prioritize correctly instead of guessing.

This is general legal information, not legal advice specific to your business. Requirements vary by industry, structure, and location, so confirm your specific obligations with a licensed broker, lawyer, or the relevant regulatory body.

What’s typically mandated by law or registration

• Workers’ compensation (WSIB) coverage. Once you have employees, registering with the Workplace Safety and Insurance Board is mandatory in most Ontario industries, covering workplace injury costs.
• Commercial auto insurance. If your business owns or operates vehicles, they need to be insured under a commercial policy, since a personal auto policy typically doesn’t cover business use.
• Professional licensing requirements. Many regulated professions and trades require proof of liability or errors and omissions coverage as a condition of licensing or registration.

What’s typically required by contracts, even without a legal mandate

• Commercial landlords commonly require proof of general liability insurance before signing a lease, often naming the landlord as an additional insured.
• Clients and general contractors frequently require subcontractors to carry liability insurance, and sometimes specific coverage minimums, before awarding work.
• Municipal permits for certain trades or business activities may require proof of insurance as part of the application.

How requirements differ by business type

Business type	Coverage that typically matters most
Office or professional services	General liability, professional liability (errors and omissions)
Retail store	General liability, commercial property, business interruption
Contractor or trades	General liability, tools and equipment, commercial auto
Restaurant or food service	General liability, property, liquor liability if applicable

Coverage worth having even when it isn’t strictly required

A written requirement from a landlord or client is a floor, not a ceiling. Many small businesses carry coverage beyond the minimum because the actual financial exposure justifies it, for example a professional carrying errors and omissions coverage even without a client mandate, simply because a single dispute could otherwise threaten the business. Talking through your specific operations with a business insurance broker is the most reliable way to identify gaps a generic checklist can’t fully capture.

A common gap worth checking

Businesses that started as a side project run from home sometimes carry only a homeowner’s policy, which typically excludes or sharply limits business-related liability and equipment. If your business grew out of a home office or a side hustle, it’s worth specifically confirming whether your current coverage still matches how the business actually operates now.

What happens if you’re asked for proof and don’t have it

Missing a required policy at the wrong moment has real consequences beyond an awkward conversation. A landlord can refuse to hand over keys until proof is provided, a general contractor can pull a subcontract, and a licensing body can delay or deny a registration. Beyond the immediate business disruption, operating without required coverage also leaves the business personally exposed if a claim happens in the meantime, since there’s no policy to absorb the cost. None of this is usually fixable overnight, since underwriting a new policy takes time, which is exactly why sorting out requirements before they’re urgently needed matters so much.

Certificates of insurance

Once coverage is in place, most landlords and clients want to see a certificate of insurance, a short document confirming your coverage type, limits, and effective dates, rather than the full policy itself. Your broker can issue these on request, and it’s worth asking early in a new landlord or client relationship whether one will be needed, so it’s ready before it’s asked for at the last minute.

Getting requirements right before you need them

Insurance requirements are far easier to sort out before you sign a lease or win a contract than after a client or landlord asks for proof you don’t have. A broker who works regularly with small businesses in your industry can usually tell you within one conversation what’s standard for a business like yours, and what specific contracts or permits are likely to require.

For more on how business insurance providers in this directory are evaluated, see our ranking methodology, or visit the homepage to browse coverage options across the Toronto area.