Business

What Is Certificate of Insurance (COI)?

A Certificate of Insurance (COI) is a one-page summary proving you have active coverage — the policy types, limits, and dates. Clients, landlords, and general contractors commonly require one before you start work or sign a lease.

Questions about Certificate of Insurance?

Our Ontario brokers can explain how it applies to your policy.

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Related coverage

Certificate of Insurance (COI) in OntarioCommercial General Liability Insurance (CGL) in Ontario

Related terms

Additional InsuredCommercial General Liability
Reviewed by Roughley Insurance Brokers Ltd. — licensed Ontario insurance brokers since 1945. Last updated May 29, 2026. ← Back to the glossary