Certificate of Insurance (COI): Complete Guide for 2026
A COI proves your business is insured. Learn exactly what it covers, what it doesn't, how additional insured status works, and how to get one in 15 minutes. Updated October 2026.
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What Is a Certificate of Insurance?
A certificate of insurance (COI) — sometimes called a certificate of liability insurance or proof of insurance — is a one-page document that summarizes your business's active insurance coverage. It is the standard way to prove to clients, landlords, general contractors, and licensing boards that your business is insured.
The most common format is the ACORD 25 form (for liability insurance) or ACORD 27/28 (for property). ACORD is the insurance industry's standard forms organization — when someone asks for "an ACORD certificate," they mean the standard one-page summary form.
Important: A COI is not a policy. It does not grant the certificate holder any rights under the policy, does not change coverage, and is not a legally binding guarantee — it is evidence that coverage exists at the time of issuance.
What a COI Includes
Insured Business Info
Your business name, address, and contact information as listed on your policy.
Insurance Company
The carrier name, NAIC number, and A.M. Best rating — clients use this to verify the insurer's financial stability.
Coverage Types
Each active policy type: General Liability, Commercial Auto, Workers' Comp, Umbrella, etc.
Policy Numbers
Individual policy numbers for each coverage type — used to verify coverage directly with the carrier.
Policy Dates
Effective date and expiration date for each policy — verifies coverage is active, not lapsed.
Coverage Limits
Per occurrence limit, aggregate limit, products/completed operations aggregate, and other key limits.
Certificate Holder
The entity requesting the COI — listed in the bottom-left. Being listed here gives no policy rights.
Additional Insured Notes
If additional insured or waiver of subrogation endorsements are in place, they're noted in the description box.
Additional Insured Status: What It Really Means
When a client asks to be "named as additional insured" on your policy, they want your insurance to defend and potentially pay claims against them that arise from your work.
Example: A plumber does work for a general contractor. The GC requires additional insured status. Six months later, the GC is sued because of a water leak traced back to the plumber's work. With additional insured status, the plumber's GL policy can step in to defend the GC — even though the GC isn't the one who purchased the policy.
Common Misconception
Being listed as "certificate holder" is NOT the same as additional insured status. A certificate holder has no rights under the policy — they just receive a copy of the COI. Additional insured status must be formally added via a policy endorsement. If a client asks to be additional insured, confirm the endorsement is on file with your carrier, not just noted informally on the COI.
| Status | Policy Rights? | Can File a Claim? | Receives COI? |
|---|---|---|---|
| Certificate Holder | ❌ No | ❌ No | ✅ Yes |
| Additional Insured | ✅ Limited | ✅ Yes (arising from your work) | ✅ Yes |
How to Get a COI Quickly
Get insured online
With ERGO NEXT, you can complete your application, get an instant quote, and purchase coverage in under 15 minutes — no waiting for an agent to call back.
Generate your COI instantly
Once coverage is active, you can download your COI directly from the ERGO NEXT client portal — 24/7, no request wait time.
Customize certificate holder information
Enter the client or contractor name and address for the certificate holder section. Each client requesting a COI needs their own certificate with their name and address.
Add additional insured endorsements
If a client requires additional insured status, confirm the endorsement is on file and noted on the COI. This may require a policy endorsement — not just a COI note.
Save and send
Download the PDF and email directly to your client, GC, landlord, or licensing board. No charge per COI — generate as many as you need.
Common COI Mistakes That Can Cost You Jobs
Expired COI
Submitting a COI from a lapsed policy period. Always confirm the policy dates on your COI are current before sending.
Wrong certificate holder name
Listing the wrong legal entity name for the client or GC. Match the exact legal name as it appears in the contract.
Missing additional insured endorsement
Noting "additional insured" in the description box without a formal policy endorsement. The endorsement in the policy controls — the COI note alone is not sufficient.
Coverage limit below contract requirements
Many contracts require $1M, $2M, or $5M in GL coverage. Verify your policy limits match or exceed the contract requirements before bidding.
Wrong policy type listed
Confusing general liability with professional liability, or omitting workers' comp when the contract requires it. Review contract insurance requirements carefully.
COI Frequently Asked Questions
Frequently Asked Questions
What is a certificate of insurance (COI)?+
What does a COI include?+
What is additional insured status on a COI?+
Does the certificate holder get notified if my insurance is cancelled?+
How quickly can I get a COI with ERGO NEXT?+
Get Insured & Your COI in 15 Minutes
ERGO NEXT issues instant COIs after coverage is purchased. No waiting for an agent — available 24/7 from your client portal.
By clicking, you agree to Insurance Pro Agencies' Terms of Use and Privacy Policy, and authorize Insurance Pro Agencies, Inc and its affiliated carrier partners to contact you using the information you provide during the quoting process. Consent is not a condition of obtaining a quote.
Backed by Munich Re. 750,000+ businesses insured. Get your certificate of insurance instantly.