Certificate of Insurance: The Complete Guide (2026)
What a COI is, why clients require it, how to read every field on an ACORD 25 form, and how to get one instantly. Updated October 2026.
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What Is a Certificate of Insurance?
A certificate of insurance (COI) is a one-page summary document that proves your business has active insurance coverage. It lists your carrier, policy type, coverage limits, policy numbers, and effective dates — all on a standardized form.
A COI is not the actual insurance policy. It does not create or modify any coverage — it is simply evidence that a policy exists. If someone needs to verify your coverage before letting you start a job, sign a contract, or approve a lease, they will ask for a certificate of insurance.
The most common COI form is the ACORD 25, which is the standardized Certificate of Liability Insurance used across almost the entire insurance industry in the United States.
Why Do Clients and Landlords Require COIs?
Anyone who hires you or allows you on their property takes on some risk. If you damage something, injure someone, or a third party files a claim related to your work, that client could be dragged into a lawsuit alongside you.
General Contractors
Require COIs from all subcontractors before anyone sets foot on a job site. They can be sued for your mistakes if you are uninsured.
Commercial Landlords
Require GL coverage (often naming them as additional insured) before signing a lease. One tenant incident can expose them to liability.
Government Agencies
Federal and state contracts always require specific insurance minimums. No COI = no contract award.
Event Venues
Require GL from event planners and vendors. One injury at a venue can result in lawsuits against the venue itself.
Property Managers
Require COIs from maintenance and service contractors before granting access to managed properties.
Corporate Clients
Enterprise clients require COIs from vendors and service providers to protect themselves from vendor-caused incidents.
Reading the ACORD 25: Field by Field
The ACORD 25 is the standard Certificate of Liability Insurance form. Here is what every section means:
Producer
The insurance agent or company that issued the certificate. This is who to contact if you need changes or updates.
Insured
The business or person named on the insurance policy. This should be your legal business name exactly as it appears on your policy.
Insurers Affording Coverage
The actual insurance carriers for each policy. You may have multiple carriers for different policy types.
Coverages (GL, WC, Auto, Umbrella)
Each row lists a policy type, the policy number, effective and expiration dates, and the coverage limits.
General Liability Limits
Shows per-occurrence limit (max per single claim), aggregate limit (max per year), personal injury limit, products-completed operations limit.
Certificate Holder
The company or person requesting the certificate. They receive a copy but are NOT automatically covered by your policy.
Additional Insured checkbox
If checked, the certificate holder is added as an additional insured — actually covered by your policy. This requires a policy endorsement, not just a checkbox.
Subrogation Waiver checkbox
If checked, your insurer has waived its right to sue the certificate holder after paying a claim.
Cancellation clause
States how many days notice the carrier will give the certificate holder if the policy is cancelled (typically 30 days).
Description of Operations
A free-text field where you can add specific job details, project names, or requirements that a client has specified.
Certificate Holder vs. Additional Insured: The Key Difference
This is the most common source of confusion when dealing with COIs. These are very different things:
📋 Certificate Holder
- ✓ Receives a copy of the COI
- ✓ Gets notified if policy is cancelled
- ✗ NOT covered by your policy
- ✗ Cannot file a claim under your policy
Example: A client asks to be listed on your COI to verify you have insurance. They are a certificate holder.
🛡️ Additional Insured
- ✓ Receives a copy of the COI
- ✓ Gets notified if policy is cancelled
- ✓ IS actually covered by your policy
- ✓ Can be defended under your policy
Example: A general contractor requires you to add them as additional insured so your GL covers claims arising from your work.
Practical tip: When a client says "I need to be on your certificate," clarify whether they want to be a certificate holder (just for their records) or an additional insured (actually covered). Most commercial clients need additional insured status. With ERGO NEXT, you can add additional insureds instantly from your phone.
How to Get a Certificate of Insurance
With ERGO NEXT (Instant)
With a Traditional Agent (Slower)
COI Red Flags: What to Watch For
Expired policy dates
Check the effective and expiration dates on the policy. If the policy period has ended, the COI is worthless.
Coverage limits lower than required
If your contract requires $1M GL but the COI shows $300k, you are out of compliance. Always verify limits match requirements.
Wrong business name
The insured name on the COI must match your legal business name exactly. Mismatches can cause claim denials.
Missing additional insured endorsement
The checkbox on the COI is not enough — you need an actual policy endorsement on file. Verify with the carrier.
Unlicensed or unrated carrier
If you receive a COI from a carrier you have never heard of, verify they are licensed in your state and have an AM Best rating.
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