Certificate of Insurance (COI): What It Is and How to Read One
The COI is the most requested and most misunderstood document in business insurance. This guide decodes the standard ACORD 25 form field by field, explains what it can and can't prove, and shows you how to read one in about two minutes.
A certificate of insurance is a standardized one-page summary of a business’s liability coverage, issued by its insurance agent as proof for a third party — a client, landlord, or contractor. It shows which policies were in force, with what limits, on the day it was issued. It is evidence of insurance, not insurance itself.
Key takeaways
A COI is proof, not a policy. It summarizes coverage that was in force on its issue date; the policy itself is what pays claims.
The standard form is the ACORD 25, used by nearly every US agency — the same fields in the same places, everywhere.
It confers no rights on the holder. The disclaimer printed across the top says so explicitly; where the policy and certificate disagree, the policy governs.
Certificate holder ≠additional insured. One gets a copy of the document; the other gets actual coverage via a policy endorsement.
Read it in a fixed order — insured, dates, coverage rows, checkboxes, then the free-text description — and you’ll catch most defects in two minutes.
Somewhere between signing a client contract and starting the job, the request arrives: “Please send your certificate of insurance.” For freelancers and contractors, it’s often the first time they’ve heard the term — and it usually comes with a deadline.
Here’s the whole idea in one paragraph: a certificate of insurance is a document your insurance agent produces that tells a third party, “yes, this business carries these policies, with these limits, as of today.” The standard form used across US commercial insurance is the ACORD 25, the Certificate of Liability Insurance. It’s issued by the producer — your agent or broker — not by the insurance company itself. Most often, the policy behind the certificate is general liability insurance for a small business.
What it isn’t matters more: it isn’t the policy, it isn’t a guarantee that coverage is still in force right now, and it doesn’t give the recipient any claim on your insurance. One contractor-insurance guide states it plainly: the COI is “only proof of liability insurance; it is not an endorsement of the policy.” (Source: contractorsliability.com, opened 2026-09-29)
Think of it like the insurance card in your car’s glove box. It proves you had coverage when it was printed — not that the policy is still in force today.
The form: ACORD 25
ACORD is the insurance industry’s standards body, and the ACORD 25 is its Certificate of Liability Insurance form. The standardization is the entire point: a certificate issued in Tampa puts its fields in the same places as one issued in Seattle, so whoever receives it knows exactly where to look.
It’s a liability certificate. The ACORD 25 summarizes liability lines — general liability, auto liability, umbrella/excess, workers’ compensation. Buildings, contents, and business income travel on separate forms.
The certificate itself never expires — the coverage does. Each coverage row carries its own policy effective and expiration dates. Request a fresh certificate at each renewal.
It’s a snapshot. The certificate reflects what was in force on the day it was issued. Coverage can end before the printed expiration dates if a policy is cancelled.
Field-by-field walkthrough
Reading top to bottom, here’s what each section of the ACORD 25 means. (Field structure described from a detailed ACORD 25 guide; verify against the actual form edition in front of you, since ACORD revises its forms periodically. Source: sortspoke.com, opened 2026-09-29)
The disclaimer band. Right at the top, in capital letters: “THIS CERTIFICATE IS ISSUED AS A MATTER OF INFORMATION ONLY AND CONFERS NO RIGHTS UPON THE CERTIFICATE HOLDER.” It sets the legal character of everything below it — memorize this sentence.
Producer. The agency or brokerage that issued the certificate. Corrections to the document come from here.
Insured. The named insured and mailing address — the business the policies belong to. This must match the entity you contracted with; a parent company on the certificate and a subsidiary on the contract is a coverage gap, not a typo.
Insurers affording coverage. Up to six carriers, lettered A through F, each with its NAIC number. The letters are keys: every coverage row points back to one of them, telling you which carrier wrote which line.
Certificate and revision numbers. Identifiers for this issuance. A revision number above zero means an earlier version of this certificate is circulating somewhere.
Coverage rows. The meat of the form: commercial general liability, automobile liability, umbrella or excess liability, and workers’ compensation — each with policy number, effective and expiration dates, and limits. The GL row also notes whether the aggregate applies per policy, per project, or per location — critical on construction work, where one big claim shouldn’t exhaust coverage for every other job.
ADDL INSD / SUBR WVD. Two per-row checkboxes: additional insured status and waiver of subrogation. These are claims about what the policy contains, not grants — the actual status is created by a policy endorsement.
Description of Operations / Locations / Vehicles. Free text — the least structured, most consequential box on the page. Project identifiers, job-site addresses, and additional-insured wording land here. If it overflows onto an ACORD 101 attachment, the certificate is incomplete without it.
Certificate holder. The party the certificate was issued to. Their name and address should line up with the contract.
Cancellation and authorized representative. The notice provision and the issuing producer’s signature. An unsigned certificate isn’t finished.
The five-pass reading order
Whether you’re a contractor checking your own certificate or a property manager clearing a vendor, run the same five passes in the same order every time. Two minutes, once it’s habit:
Pass 1 — The named insured. Confirm the entity on the certificate is the entity you’re doing business with. Everything downstream is wasted effort if the name is wrong.
Pass 2 — The dates, before the limits. Find the effective and expiration dates on every coverage row. An expired row makes the rest of that row irrelevant.
Pass 3 — Match rows to requirements. Work from your requirement list to the certificate, not the other way around. Absence is the failure mode: hired and non-owned auto, for instance, is frequently required and quietly missing.
Pass 4 — Treat the checkboxes as questions. Note which rows carry ADDL INSD or SUBR WVD marks, then decide whether you need the endorsement behind them. On a low-value vendor you might accept the checkbox; on a construction contract, ask for the endorsement itself.
Pass 5 — Read Description of Operations last, and read it properly. The free-text block is the one section you cannot skim. If it references an ACORD 101, get the attachment.
Five things it does not prove
This is where certificates cause real trouble. People treat the document as stronger than it is. It does not prove:
1. That you have rights under the policy. The disclaimer says so explicitly. The certificate doesn’t amend the underlying policies; where the two disagree, the policy governs.
2. That the checkboxes equal endorsements. ADDL INSD indicates additional insured status is claimed; SUBR WVD indicates a waiver of subrogation is claimed. Either is actually created by a policy endorsement. If it’s contractually important, ask for the endorsement document.
3. That the limits are still available. Aggregate limits erode as claims are paid. A certificate showing a $2 million aggregate tells you what the policy was written for — not what remains today.
4. That you’ll be told about cancellation. The form says notice will be delivered per the policy provisions — not a promise of advance notice to you. If your contract requires cancellation notice, that belongs in the contract and an endorsement, not on the certificate.
5. Anything about property. The ACORD 25 is a liability certificate. Evidence of property or builders-risk coverage is a different document.
Certificate holder vs. additional insured
The most expensive misunderstanding in commercial insurance paperwork: confusing the certificate holder with an additional insured. They’re inches apart on the same form and do completely different jobs.
A certificate holder is simply the party your agent sends the certificate to — their name goes in a box so there’s a record of who received proof your policy exists. They can’t make a claim under your policy or demand your carrier defend them.
An additional insured is a party added to your policy itself, by an endorsement the carrier issues. They become an insured under your coverage for liability arising out of your work — if someone sues them over something you did, your policy can respond. As one commercial-insurance guide puts it: “One is a mailing label. The other is coverage.” (Source: proinsgrp.com, opened 2026-09-29)
How to tell which one your contract requires? Read the insurance section of the contract, not the request email. Language like “shall be named as an additional insured” or “additional insured on a primary and non-contributory basis” means additional insured status is required. Language like “provide a certificate of insurance evidencing coverage” usually means the certificate alone suffices.
If the contract requires additional insured status and you supply only a certificate listing them as holder, you’re in breach — usually without realizing it, until a claim gets tendered and denied. The ACORD form itself warns: “if the certificate holder is an ADDITIONAL INSURED, the policy(ies) must have ADDITIONAL INSURED provisions or be endorsed.” The certificate reports the endorsement; it can’t create it.
One practical tip: ask your agent whether your general liability policy carries a blanket additional insured endorsement, which automatically extends the status to parties you’re required to add by written contract. And if a dispute ever reaches the point of testing these distinctions, our step-by-step guide to filing a liability insurance claim walks through what happens next.
Getting one — and asking for one
If you’re the freelancer or contractor — our guide to whether freelancers and contractors need liability insurance can help you decide that first — contact your agent or broker and request a certificate naming your client as certificate holder. Typically free and often same-day. Before it’s issued, verify your policies actually meet the client’s stated requirements — discovering a gap after the certificate goes out helps no one.
If you’re the hiring party: ask for a fresh certificate at the start of each engagement and at each renewal. Run the five-pass read. For high-value work, the endorsement behind the checkbox is the document that actually matters.
If you spot an error: contact the issuing agency immediately. It could be a typo — or a coverage gap you didn’t know you had. Fix it before the job starts, not after the incident.
Frequently asked questions
How long does it take to get a COI?
Usually same-day from your agent — it’s a routine request. Without a blanket additional insured endorsement, each new additional insured can mean a separate endorsement request and a longer wait.
Does a COI cost money?
The certificate itself is typically free. What’s not free is the coverage behind it — if a contract requires limits or endorsements you don’t carry, those cost money.
Can I make my own COI?
No. Certificates are issued by your agent or broker out of their agency system. A self-made certificate is at best worthless and at worst fraud.
My client wants additional-insured status my policy doesn’t include. What now?
Talk to your agent about adding the endorsement before signing. Don’t ask for the wording to just be typed onto the certificate — it can’t create coverage the policy doesn’t have.
The job starts after my policy expires. Problem?
Yes. The certificate proves coverage as of its issue date. Set a calendar reminder for renewal so the client gets a fresh certificate on time.
Your concrete next step
Pull the most recent certificate your business has issued or received — whichever side of the table you’re on — and run the five-pass read: insured, dates, coverage rows, checkboxes, description of operations. Time yourself. If it takes more than five minutes, the form is still unfamiliar; if you finish in two, you’ve got a skill most people in your industry lack.
Educational note: this article explains commercial insurance documentation concepts in general terms. Certificate requirements vary by contract, trade, and jurisdiction. For your specific situation, consult a licensed insurance agent or attorney.
