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Running a business in Ontario often means entering contracts, renting space, or working with clients who need proof that you’re properly insured. That’s where a Certificate of Insurance, or COI, comes in.

It’s one of the most common insurance documents requested in the business world, yet many entrepreneurs aren’t entirely sure what it means. In this post, we’ll break down what a COI is, why it matters, and what every Ontario business owner should know before providing one.

What Is a Certificate of Insurance?

A Certificate of Insurance (COI) is a one-page summary that provides proof that your business carries active insurance coverage. It’s issued by your insurance broker or insurer and is typically provided to another party—such as a landlord, client, or general contractor—as evidence of coverage.

Think of it as a snapshot of your insurance policies. It doesn’t include every detail, but it shows the most important information, such as coverage types, policy limits, and effective dates.

A COI isn’t the actual policy itself. Instead, it’s confirmation that the coverage exists as of the date the certificate was issued. For example, if your client wants to make sure you have Commercial General Liability (CGL) insurance before signing a contract, they’ll ask for a COI to verify it.

In Ontario, Certificates of Insurance are often used in commercial agreements to show financial responsibility and protect both sides of a business relationship.

Why Businesses in Ontario Need a Certificate of Insurance

Many Ontario businesses can’t start work, move into a property, or sign a contract without first providing a COI. It’s a standard business practice that helps establish trust and verify that all parties are protected against potential risks.

Here are some common situations where a Certificate of Insurance is required:

• Leasing commercial space: Landlords often require proof of insurance before handing over the keys.
• Contractor or subcontractor agreements: General contractors typically need to see proof that subcontractors carry their own liability coverage.
• Professional services and consulting: Clients may request proof of Errors & Omissions (Professional Liability) coverage before signing a service contract.
• Event participation: Trade shows, fairs, and community events often require proof of liability insurance from exhibitors and vendors.
• Municipal permits: Cities and towns frequently ask for COIs when issuing business or event permits.

For business owners, a COI is a simple but powerful way to demonstrate credibility. It shows that your business is prepared, compliant, and financially responsible. In some cases, not having a valid certificate can delay contracts or prevent you from being awarded a job.

What Information Does a Certificate of Insurance Include?

A standard Certificate of Insurance summarizes the key elements of your policy in a clear, standardized format. While every insurer’s layout may differ slightly, most COIs contain the following information:

• Named Insured: The legal name of your business or the individual covered by the policy.
• Insurance Company and Broker Information: The name, address, and contact information of the insurance company or broker who issued the certificate.
• Policy Numbers: Each active policy is listed with a unique identification number.
• Effective and Expiry Dates: The start and end dates of coverage, which confirm that your policy is currently in force.
• Types of Coverage: A breakdown of what’s included, such as:
• Commercial General Liability
• Commercial Property
• Commercial Auto
• Professional Liability (Errors & Omissions)
• Cyber Liability
• Marine or Contractor’s Equipment coverage
• Coverage Limits: The maximum amount the insurer will pay under each coverage type (e.g., $2,000,000 CGL limit).
• Certificate Holder: The party requesting the certificate—often a landlord, client, or partner.
• Additional Insureds: When a third party is added to your policy for liability protection related to your work.

Before sending a COI, always verify that the information is accurate and up to date. A small typo in a business name or policy number can cause confusion or delays.

How to Obtain a Certificate of Insurance

Requesting a Certificate of Insurance in Ontario is simple—but it’s important to know what’s required to avoid delays.

Here’s how to get one:

• Contact your insurance broker. Let them know you need a COI and specify who it’s for.
• Provide the certificate holder’s details. This includes the name, mailing address, and email of the person or company requesting the document.
• Share any special requirements. Some contracts require specific language, endorsements, or wording such as “additional insured” or “waiver of subrogation.” Send a copy of the contract or request form to your broker.
• Wait for processing. Most brokers can issue a COI within one business day, but complex requests may take longer if insurer approval is required.
• Review before sending. Double-check names, dates, and coverage limits to ensure everything matches the request.
• Keep a copy. Store the COI for your records, especially if it’s tied to a specific project or contract.

Your broker’s job is to make this process smooth. If you regularly need certificates—for example, as a contractor or consultant—let your broker know so they can set up a streamlined process for quick issuance.

Common Mistakes and Misunderstandings

Certificates of Insurance are straightforward, but small errors or assumptions can lead to problems. Here are some of the most common issues Ontario business owners encounter—and how to avoid them.

Thinking a COI Guarantees Coverage

A COI only confirms that coverage exists at the time of issuance. It doesn’t guarantee that your insurer will pay out a claim, nor does it extend coverage beyond what’s written in your actual policy. Always read your policy for the full terms and exclusions.

Forgetting to Update Expired Certificates

Many contracts require that your COI remain valid throughout the duration of a project or lease. If your policy renews or changes mid-term, you’ll need to send an updated certificate. An expired COI may result in non-compliance or contract delays.

Not Checking the Additional Insured Section

If your client or landlord is supposed to be listed as an additional insured, make sure that section of the COI is completed and properly endorsed on your policy. Failing to do so could mean they aren’t actually covered.

Assuming One Certificate Works for All Contracts

Each client or project may have unique insurance requirements. Some may ask for higher limits, specific endorsements, or evidence of coverage types you don’t currently carry. Always read the contract carefully and confirm your coverage meets the terms.

Sending Outdated or Incorrect Information

Even small errors—such as using an old business name or outdated address—can create confusion. Always verify every field before submitting your COI.

By paying attention to these details, you’ll build trust with your partners and prevent unnecessary administrative headaches.

Additional Insured and Waiver of Subrogation Explained

Two common terms that appear in Certificate of Insurance requests are “additional insured” and “waiver of subrogation.” Here’s what they mean in plain English.

Additional Insured

An additional insured is a third party—often a landlord, general contractor, or client—who is added to your policy for liability protection related to your work.

For example, if you’re a contractor working on a client’s property and an accident occurs, the client could be named in a lawsuit. By being listed as an additional insured, the client receives some protection under your liability policy.

Adding an additional insured usually requires an endorsement on your policy, so it’s not just a box on the COI. Always confirm with your broker that the endorsement has been properly added.

Waiver of Subrogation

A waiver of subrogation prevents your insurance company from seeking reimbursement (or “subrogating”) from another party after paying a claim.

For example, if your client’s actions contributed to a loss, your insurer would normally have the right to pursue them for recovery. A waiver of subrogation removes that right, as a condition of your contract.

Because this affects your insurer’s rights, adding a waiver may require insurer approval and an additional premium. Make sure your broker reviews the contract language carefully.

Keeping Your Certificates Organized

If your business issues COIs frequently, organization is key. Disorganization can lead to missed deadlines, expired certificates, or lost documents—all of which can slow down your operations.

Here are some practical tips for staying on top of your certificates:

• Create a tracking spreadsheet: Record who requested each certificate, the issue date, and the expiry date.
• Store copies digitally: Use secure cloud storage so you can access them quickly.
• Set renewal reminders: Schedule alerts for policy renewals or upcoming contract deadlines.
• Standardize naming conventions: Include the client name and project in each file title for easy searching.
• Ask your broker for bulk support: If you issue dozens of COIs each year, your broker can often automate the process or provide templates.

Well-organized certificate management not only saves time—it also helps maintain your professional reputation.

A Certificate of Insurance is much more than a piece of paper—it’s proof that your business is covered, credible, and contract-ready. Whether you’re renting office space, bidding on construction projects, or signing service agreements, having a current and accurate COI gives your partners confidence that you take risk management seriously.

For Ontario business owners, keeping your certificates up to date can mean the difference between landing a job and losing an opportunity.

If you’re unsure what your client or landlord needs, or if you want help setting up a process for issuing certificates quickly, talk to your insurance broker. They can guide you through the requirements, endorsements, and contract language to make sure everything is in order.

Contact your broker today to get your proof of coverage issued quickly and correctly—so you can focus on running your business with peace of mind.