A contractor is about to start work on your property, a new client wants proof of insurance before signing, or your landlord asks for documentation before handing over the keys. In each case, the same document comes up: what is a certificate of insurance? In short, a certificate of insurance (COI) is a one-page summary proving that an insurance policy exists, showing who is covered, what coverage is in place, and when it expires. In this guide, you will learn what a COI contains, who issues it, when you need one, how to get one, how to check one you receive, and, just as important, what a COI does not prove.
What Is a Certificate of Insurance?
A certificate of insurance (COI) is a standardized, one-page document issued by an insurance company or a licensed insurance agent that summarizes the key details of an insurance policy. It shows the name of the insured business or person, the types of coverage in force, the policy numbers, the coverage limits, and the effective and expiration dates. It is the business equivalent of the insurance card you keep in your car: proof that coverage exists at a specific point in time.
The most important thing to understand about a COI is what it is not. It is not the insurance policy itself. It does not create coverage, change coverage, or guarantee that coverage will stay in force. The standard certificate form says so in plain language: it is “issued as a matter of information only and confers no rights upon the certificate holder” and “does not affirmatively or negatively amend, extend or alter the coverage afforded by the policies” listed on it. In a dispute, the actual policy and its endorsements always govern, the certificate is only a snapshot.
Businesses, landlords, and project owners request COIs constantly because they need fast proof that the other party carries adequate insurance without wading through a full policy contract that can run to dozens of pages. A general contractor wants to know the electrician has liability coverage before work begins. A landlord wants proof a tenant’s business is insured before signing a lease. A client wants to confirm a consultant carries professional liability coverage before sharing sensitive data. The COI answers all of those questions on a single page.
COIs can document many types of coverage, including general liability, commercial auto, workers’ compensation, professional liability (also called errors and omissions), commercial property, and umbrella or excess liability. Most certificates in the United States follow a standard form called the ACORD 25, developed by the Association for Cooperative Operations Research and Development (ACORD) and recognized across virtually every industry and state.
What Information Is on a Certificate of Insurance?
A standard COI packs a lot of information onto one page. Here are the sections you will find on a typical ACORD 25 certificate of liability insurance:
- Producer: The insurance agency or broker that issued the certificate, with contact details.
- Insured: The name and address of the business or person whose insurance is being certified.
- Insurers: The insurance companies providing each policy, usually listed by letter (Insurer A, B, C) with their NAIC numbers.
- Coverage types: The kinds of insurance in force, for example, commercial general liability, automobile liability, umbrella liability, workers’ compensation, and professional liability.
- Policy numbers: The number of each policy listed, so the coverage can be traced back to the insurer.
- Policy effective and expiration dates: The start and end date of each policy, so the reader can see whether coverage is current.
- Limits: The coverage limits for each policy, such as $1 million per occurrence and $2 million aggregate for general liability.
- Description of operations: A short description of the work or project the certificate relates to, sometimes including the job location.
- Certificate holder: The name and address of the party requesting the certificate, the person or business that will receive it.
- Cancellation notice: A statement about whether the insurer will try to notify the certificate holder if a policy is cancelled before its expiration date. Note that this is a best-efforts statement, not a guarantee.
- Authorized representative signature: The signature of the agent or insurer representative issuing the certificate.
When you read a COI, check the dates first, an expired policy is the most common problem. Then check the limits against what your contract requires, and confirm the coverage types match the work being done.
Common COI Forms: ACORD 25, 24, and 27
Not every certificate is the same form. ACORD publishes several standard certificate forms, and using the right one matters:
- ACORD 25, Certificate of Liability Insurance: The most common form, covering general liability, auto liability, umbrella, workers’ compensation, and professional liability. When someone asks for a “certificate of insurance,” they almost always mean an ACORD 25.
- ACORD 24, Certificate of Property Insurance: Used to evidence property insurance, such as coverage on a building or business personal property.
- ACORD 27, Evidence of Property Insurance: A more detailed property form often requested by mortgage lenders, showing property coverage, mortgagee information, and loss payee details.
- ACORD 126 and others: ACORD also publishes application and supplementary forms, but these three certificates cover the vast majority of requests.
Carriers sometimes use their own certificate forms instead of ACORD’s, but the content is equivalent: who is insured, what coverage exists, policy numbers, dates, and limits. What matters is not the form number but whether the information on it matches the contract requirements. If a client or landlord asks for a specific form, confirm which one before your agent issues it, sending the wrong form is a common cause of delays.
Certificate Holder vs. Additional Insured
Two terms on every COI cause the most confusion, and mixing them up can leave you unprotected:
Certificate holder is simply the party the certificate is addressed to, the recipient. Being named as a certificate holder gives you a copy of the certificate and, in many cases, notice if the policy is cancelled. It does not give you any coverage under the policy, and it does not make you an insured. Holding a certificate gives you a piece of paper; it gives you no rights to file a claim against the other party’s policy.
Additional insured is a party that has been added to the other party’s policy by endorsement, giving them actual coverage under that policy for claims arising from the named insured’s work. If a general contractor is an additional insured on a subcontractor’s liability policy, the contractor can tender a claim to that policy if the subcontractor’s work causes damage. The ACORD 25 form itself warns that if the certificate holder is an additional insured, the policy must be endorsed, a statement on the certificate alone does not confer that status.
Two related terms often appear alongside these requests:
- Waiver of subrogation: An agreement that the insurer will not try to recover claim payments from the certificate holder. This also requires a policy endorsement, not just a note on the certificate.
- Primary and noncontributory wording: A requirement that the subcontractor’s policy pays first, before the certificate holder’s own policy contributes. Again, this is a policy term delivered by endorsement.
The practical lesson is simple: if a contract asks for additional insured status, a waiver of subrogation, or 30 days’ notice of cancellation, do not accept a certificate that merely mentions those items in the description box. Ask for the actual endorsements and verify they are attached to the policy. Several states have also passed laws, for example, Texas Insurance Code Chapter 1811 and California Insurance Code section 384, stating that a certificate cannot say anything that differs from the policy and cannot amend, extend, or alter coverage.
When Do You Need a Certificate of Insurance?
You will need a COI whenever someone else wants proof of your insurance before doing business with you, and you should ask for one whenever someone else’s insurance protects you. Common situations include:
- Hiring a contractor or subcontractor: General contractors routinely require COIs from every subcontractor before work starts, to confirm liability and workers’ compensation coverage.
- Signing a commercial lease: Landlords usually require tenants to provide a COI showing liability coverage, and sometimes property coverage, before move-in.
- Starting a client project: Clients, especially larger companies and government agencies, often require vendors and consultants to submit a COI as part of onboarding.
- Renting a venue or equipment: Event venues, film locations, and equipment rental companies commonly ask for a COI naming them as certificate holder.
- Winning a bid or RFP: Many bid packages require a COI upfront, with minimum limits specified in the bid documents.
- Working on a construction site: Site owners and general contractors collect COIs from everyone on site, and may refuse entry without one.
- As a homeowner: Before a roofer, plumber, or remodeler starts work on your home, ask for their COI. If an uninsured worker is injured on your property, the liability could fall on you.
For small businesses, keeping a current COI ready to send is a competitive advantage, a vendor who can produce a certificate within hours often wins work over one who takes days. Ask your agent to keep a template on file with your most common certificate holders so reissues take minutes.
How to Get a Certificate of Insurance
Getting a COI is usually quick and free. Here is the process, step by step:
- Contact your insurance agent or insurer. COIs are issued by your insurer or your licensed agent, not by you. Call, email, or use your insurer’s online portal.
- Provide the certificate holder’s details. You will need the exact legal name and address of the party requesting the certificate, plus any project name, job location, or contract number they want shown in the description box.
- Share the contract’s insurance requirements. If the requestor specified minimum limits, additional insured status, a waiver of subrogation, or a cancellation notice period, pass them to your agent so the certificate, and any needed endorsements, can be prepared correctly.
- Wait for issuance. A straightforward certificate is often issued the same day, sometimes within minutes through an online portal. If endorsements are needed, allow extra time, endorsements can take days because the insurer must add them to the policy.
- Send the certificate to the requestor. Your agent can usually email it directly to the certificate holder, or you can forward the PDF yourself. Keep a copy for your records.
How much does a certificate of insurance cost? Usually nothing beyond your premium. Insurers and agents typically issue certificates at no separate charge while your policy is active. Charges can arise if the request requires an endorsement, for example, adding someone as an additional insured, because endorsements change the policy and may carry an added premium. Those charges vary by insurer and policy, so ask upfront if a special endorsement is involved.
One caution: only your insurer or agent can issue a valid COI. A certificate that does not match a real policy is worthless, and in many states issuing a false certificate is illegal.
How to Verify a COI You Receive
Receiving a COI is not the same as being protected: it reflects coverage only as of the day it was issued, and if the policy is later cancelled or modified, the COI becomes stale. Fraudulent certificates also circulate. Before relying on one, run through this checklist:
- Check the dates. Confirm every listed policy is currently in force and will remain in force for the duration of your project or lease. Ask for a new certificate if the project runs past an expiration date.
- Match the limits to your contract. Verify the per-occurrence and aggregate limits meet or exceed what your contract requires.
- Confirm the coverage types. Make sure the certificate lists every coverage your contract requires, general liability, auto, workers’ compensation, umbrella, or professional liability.
- Verify the insured’s name matches the contract. The business name on the certificate should match the legal name on your agreement, not a trade name or a different entity.
- Check additional insured and waiver language. If your contract requires additional insured status or a waiver of subrogation, ask for copies of the actual endorsements. A note in the description box is not enough.
- Call the agent or insurer. The producer’s contact information is on the certificate. A quick call to confirm the policy is active and the certificate is genuine takes minutes and catches most fraud.
- Request updates on long engagements. For projects lasting months, ask the vendor to send a fresh certificate at renewal, and consider asking to be notified of cancellation if your contract allows it.
For ongoing relationships, some businesses use certificate tracking software or a simple spreadsheet of expiration dates, with reminders set a few weeks before each vendor’s policies renew. That small bit of administration prevents the all-too-common situation of discovering an expired certificate only after an incident has happened.
COI vs. Insurance Binder
COIs and insurance binders are often confused because both serve as proof of insurance, but they do very different jobs:
| Feature | Certificate of Insurance (COI) | Insurance Binder |
|---|---|---|
| Purpose | Shows that a policy already exists | Creates temporary coverage until a policy is issued |
| When issued | After the policy has been underwritten and issued | While the full policy is still being prepared |
| Legal weight | Information only, confers no rights and does not change coverage | A binding temporary contract of insurance |
| Typical user | Businesses proving coverage to clients, landlords, and contractors | Homebuyers at closing, car buyers, new businesses needing immediate proof |
| Duration | Valid as a snapshot until the policies change or expire | Typically 30 to 90 days, then replaced by the full policy |
In short: a binder is coverage, temporarily; a certificate shows coverage that already exists. If a lender asks for proof while your policy is still being underwritten, you need a binder. If a client asks for proof of a policy you already hold, you need a certificate. For the full picture on binders, see our guide to what an insurance binder is and how to get one fast.
Frequently Asked Questions
How do I get a certificate of insurance?
Contact your insurance agent or insurer and provide the certificate holder’s name and address, plus any project details or contract requirements. The agent issues the certificate, usually the same day and usually at no separate charge. If your contract requires additional insured status or other endorsements, allow extra time, as those must be added to the policy itself.
How much does a certificate of insurance cost?
Usually nothing beyond your existing premium. Insurers and agents typically issue certificates for free while your policy is active. You may pay extra only if the request requires a policy endorsement, such as adding an additional insured, and that charge varies by insurer and policy.
What is the difference between a certificate holder and an additional insured?
A certificate holder is simply the recipient of the certificate, being named as one gives you a copy and possibly cancellation notice, but no coverage. An additional insured is a party added to the policy by endorsement, giving them actual coverage under that policy. The certificate alone cannot create additional insured status; the policy must be endorsed.
How long is a certificate of insurance valid?
A COI is a snapshot of coverage on the day it is issued, so it stays accurate only while the listed policies remain in force and unchanged. If a policy is cancelled, lapses, or is modified after issuance, the certificate becomes outdated. For long projects, request a fresh certificate at each policy renewal.
Can I make my own certificate of insurance?
No. A COI must be issued by your insurer or a licensed agent. A self-made certificate is not valid proof of insurance, and in many states issuing a false certificate is illegal. If you need one quickly, most insurers can issue a certificate through an online portal within minutes.
Is a certificate of insurance the same as an insurance policy?
No. A certificate summarizes the key details of a policy, who is insured, what coverage exists, limits, and dates, but it is not the policy itself and does not change the policy’s terms. If there is ever a conflict between the certificate and the policy, the policy governs.
Conclusion
A certificate of insurance is a simple but powerful business document: one page that proves your insurance exists, shows your limits and dates, and lets clients, landlords, and contractors work with you confidently. The key is understanding its limits, it is evidence of coverage, not coverage itself, and it only stays accurate while the underlying policies remain in force. Keep a current COI ready to send, verify every certificate you receive by checking dates, limits, and endorsements, and always ask for the actual policy endorsements when a contract requires additional insured status or a waiver of subrogation.
This article is for general educational purposes only and does not constitute insurance or legal advice. Certificate rules and forms vary by insurer and state law. Consult a licensed insurance agent for guidance specific to your situation.
