Understanding Certificates of Insurance (COI)

A certificate of insurance is the most-requested and least-understood document in business insurance. Clients demand it, landlords require it, and most owners hand it over without knowing what it actually proves — or what its limits are. Getting it right keeps deals moving; getting it wrong can leave both you and the other party thinking they're protected when they're not.

What a certificate of insurance is

A certificate of insurance (COI) is a one-page summary, issued by your insurer or broker, that confirms your policies exist. It's a snapshot — not the policy itself. A standard COI (commonly the ACORD form) shows:

• The insured — your business name and address.
• The carriers — which insurance companies provide each policy.
• Coverage types — general liability, commercial auto, workers' comp, umbrella, etc.
• Limits — the per-occurrence and aggregate amounts for each.
• Effective and expiration dates — proving coverage is active now.
• The certificate holder — the client or landlord the COI was issued to.

It exists so a client or landlord can verify your coverage without reading your full policy. Business insurance terms explained.

What a COI does NOT do

This is where people get tripped up. A certificate of insurance:

• Doesn't change your coverage. It only reports what's already in the policy. The policy governs, always.
• Doesn't, by itself, protect the certificate holder. A plain COI just proves you're insured. To actually extend coverage to the client, they usually need to be added as an additional insured by endorsement — a change to the policy, not just a line on the certificate.
• Doesn't guarantee a claim will be paid. Coverage still depends on the policy terms and the facts of the claim.

Certificate holder vs. additional insured

This distinction matters more than any other:

• A certificate holder is simply the party the COI was issued to — they receive proof and notice. It doesn't extend any coverage to them.
• An additional insured is actually added to your policy by endorsement, so your coverage may respond to claims against them arising from your work.

When a client says "name us on your policy," they usually mean additional insured — and that requires an endorsement, not just listing them as a certificate holder. Confusing the two is a common and costly mistake. Why clients ask for proof of insurance.

How to read a COI like a pro

Think of a certificate like a nutrition label. It summarizes what's inside in a standard format so you can compare at a glance — but it's not the food itself, and you can't change what's in the package by editing the label. To verify a vendor's coverage, check three things: the coverage types match what the job requires, the limits meet your minimums, and the dates show the policy is active for the whole project. If you need protection for yourself, confirm you're listed as additional insured, not just certificate holder.

Getting a COI issued

You request it from your broker or insurer, specifying who needs it, the required limits, and whether they need additional insured status. A responsive broker issues standard certificates quickly — often the same day — which matters because the COI is frequently the last step before a contract is signed. How to get a COI fast.