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What Is a Certificate of Insurance (COI)? A Guide for California Businesses and Contractors

Contractors reviewing a certificate of insurance on a clipboard at a California job site.

What is a certificate of insurance? A certificate of insurance (COI) is a one-page summary that proves your business has insurance. It lists who is insured, which policies you carry, the limits, and the dates the coverage runs. In California, clients, landlords, general contractors, and property managers often ask for one before you start work or sign a lease. The certificate only describes your coverage. It does not change or add to it.

Panorama Insurance is an independent agency in Northridge, helping San Fernando Valley businesses since 1973. We handle certificate requests for our commercial clients, and we can tell you when a request asks for more than your policy gives today.

What a COI shows (and how to read one)

Most business certificates use the standard ACORD 25 form, called a Certificate of Liability Insurance. Here is what each part tells the person reading it:

  • Producer: the agency or broker that issued the certificate.
  • Insured: your business’s legal name and address. It should match the name on your contract or lease.
  • Insurers: the companies that wrote each policy.
  • Coverages: each policy type, such as general liability, commercial auto, umbrella, and workers’ compensation, with policy numbers, effective and expiration dates, and limits.
  • Description of operations: a short note about the job, location, or contract, and any special wording the requester needs.
  • Certificate holder: the person or company the certificate is made out to, usually whoever asked for it.
  • Cancellation: a section on notice if a policy cancels. It points back to the policy’s own terms.

The form also says it is issued for information only and gives the holder no rights. That line matters, and it leads to the most common mix-up.

Certificate holder vs. additional insured

Being listed as the certificate holder means a client or landlord gets proof that you have coverage. It does not give them coverage under your policy.

Being an additional insured is different. Your policy has to include an endorsement that adds them. Then, if they get pulled into a claim tied to your work, your policy may respond for them, subject to its terms. A box checked on a certificate does not create that status. The endorsement has to be on the policy.

Contracts often ask for more than additional insured status. Watch for these terms:

  • Waiver of subrogation: your insurer agrees not to go after the other party to recover what it paid on a claim. This usually needs its own endorsement.
  • Primary and non-contributory: your policy pays before the other party’s insurance, without asking theirs to share the cost.
  • Minimum limits: a set amount of coverage per claim or in total. If your limits are lower, the certificate will show that.

Send us the insurance section of the contract before you sign. It is easier to add an endorsement before the job starts than to explain a gap after.

Who asks for a COI in California

  • General contractors hiring subcontractors for remodels, tenant improvements, and new builds.
  • Commercial landlords and property managers before a lease starts or renews.
  • HOAs and building managers before a vendor works on common areas.
  • Cities, school districts, and event venues before a permit, contract, or event.
  • Larger clients who require vendor certificates before they pay an invoice.

Contractors have one more place where workers’ comp shows up. The Contractors State License Board’s public license lookup lists workers’ compensation information for each license, so homeowners and general contractors can check it. Keep your workers’ comp current with the board, and ask us if you are unsure what it shows.

How to get a certificate of insurance

  1. Get the request in writing. Ask for the holder’s exact legal name and address, plus the contract or lease insurance section.
  2. Send it to your agent. Include the job or property address and the date you need it.
  3. Check the requirements against your policy. Your agent will look at limits, additional insured wording, waiver of subrogation, and any project details.
  4. Add endorsements if needed. If the contract asks for coverage you do not have, the policy needs a change first. Some changes can affect your premium.
  5. Receive and forward the certificate. Read it before you send it. Check names, dates, and limits.

Agencies and insurers generally do not charge for a standard certificate. Changing the policy to meet a contract can cost more, depending on the endorsement and the carrier.

What a COI does not do

  • It does not add coverage. Wording typed on a certificate cannot expand the policy.
  • It does not prove coverage is still active. A certificate shows coverage on the date it was issued. Policies can cancel or lapse later.
  • It does not replace the policy. If there is a claim, the policy language and endorsements decide what gets paid.

If you are the one asking for a COI

Hiring a subcontractor, vendor, or tenant? Look at more than whether the certificate exists.

  1. Confirm the insured name matches the business you are hiring.
  2. Check that the policy dates cover the whole job, not just the start.
  3. Compare the limits to what your contract requires.
  4. If you need additional insured status, ask for a copy of the endorsement, not just a checked box.
  5. For contractors, check the license and workers’ comp information on the CSLB lookup.
  6. Track expiration dates and ask for a new certificate when a policy renews.

COI help for Northridge and San Fernando Valley businesses

Contractors, landscapers, cleaning companies, restaurants, and retail tenants across the Valley get certificate requests every week. When a contract asks for something your policy does not have, an independent agency can compare carriers available to you that may write it.

For more on the policies behind most certificates, see our guides to general liability insurance for California contractors, workers’ compensation for California small businesses, and what general liability insurance doesn’t cover.

Frequently asked questions

What is a COI in insurance?

A COI, or certificate of insurance, is a document that summarizes a business’s insurance: the policies, limits, dates, and insurers. It is proof of coverage, not the policy itself.

How long does it take to get a certificate of insurance?

A standard certificate can often be issued quickly once your agent has the holder’s details. Requests that need a new endorsement, like additional insured or waiver of subrogation, can take longer because the policy has to change first.

Is a certificate of insurance free?

Usually, yes. Agencies and insurers generally do not charge to issue a standard certificate. Adding endorsements a contract requires may change your premium.

What is the difference between a certificate holder and an additional insured?

A certificate holder receives proof that you have coverage. An additional insured is added to your policy by endorsement and may be covered for claims tied to your work, subject to the policy’s terms.

What is an ACORD 25 form?

ACORD 25 is the standard Certificate of Liability Insurance form used across the industry. It lists general liability, auto, umbrella, and workers’ compensation coverage on one page.

Do I need a new COI for every client?

Often, yes. Each certificate is made out to a specific holder, and many clients want their own name, project, or contract details on it. Clients also ask for updated certificates when your policies renew.

Got a certificate request from a client, landlord, or general contractor? Contact Panorama Insurance or call (818) 781-6630. We’ll check the requirements against your policy and compare business coverage from the carriers available to you if something is missing.

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