Key Takeaways
- An additional insured is added to another party’s policy and receives actual coverage under that policy. A certificate holder simply receives proof that a policy exists.
- Being named as an additional insured gives you the right to file a claim under someone else’s policy. A certificate of insurance gives you no claim rights at all.
- General contractors, property owners and clients commonly require subcontractors and vendors to add them as additional insureds before work begins.
- Certificates of insurance are standard documentation in California business relationships but do not change, extend or guarantee any coverage.
What This Guide Covers
- What Is an Additional Insured?
- What Is a Certificate Holder?
- Key Differences Between Additional Insured and Certificate Holder
- When You Need to Be Named as an Additional Insured
- When a Certificate of Insurance Is Enough
- How to Request or Provide Additional Insured Status
- California-Specific Considerations
- Common Mistakes to Avoid
- Frequently Asked Questions
What Is an Additional Insured?
An additional insured is a person or organization that is added to someone else’s insurance policy and gains coverage rights under that policy. The additional insured did not purchase the policy and does not control it, but they can file a claim under it if they are sued or held liable for something connected to the named insured’s work.
Additional insured status is granted through an endorsement, which is a formal modification to the insurance policy. The most common form is a CG 20 10 or CG 20 37 endorsement added to a commercial general liability (CGL) policy. These endorsements define the scope of coverage the additional insured receives, and that scope is almost always limited to liability arising out of the named insured’s work or operations.
For example, a property management company hires a plumbing contractor to work on a building. The property manager requires the plumber to add them as an additional insured on the plumber’s general liability policy. If a tenant later sues the property manager because the plumber’s work caused a leak and property damage, the property manager can file a claim under the plumber’s policy for defense costs and damages.
What Is a Certificate Holder?
A certificate holder is anyone who receives a certificate of insurance (COI). The COI is a one-page document that summarizes the key details of an insurance policy: the insurer, policy number, coverage types, limits and effective dates. It proves that a policy exists at the time the certificate is issued.
That is all it does. A certificate of insurance does not give the certificate holder any coverage rights. It does not allow them to file a claim. It does not guarantee that the policy will remain in force. It is purely informational.
The standard COI form used across the industry is the ACORD 25. At the bottom of this form there is a “Certificate Holder” field where the requesting party’s name and address are listed. Being listed there confirms that the certificate was issued to you. It does not mean you are covered by the policy.
Key Differences Between Additional Insured and Certificate Holder
| Feature | Additional Insured | Certificate Holder |
|---|---|---|
| Coverage rights | Yes. Can file claims under the policy. | No. Receives proof of coverage only. |
| How it is granted | Policy endorsement (formal policy change) | Certificate of insurance (informational document) |
| Cost | May increase the policyholder’s premium | No additional cost |
| Cancellation notice | Entitled to notice of policy cancellation or material change | May receive notice as a courtesy, but it is not guaranteed |
| Defense coverage | Yes, for claims arising from the named insured’s work | No |
| Legal standing | Can assert rights under the policy | No legal standing under the policy |
| Common document | CG 20 10, CG 20 37 endorsement | ACORD 25 certificate |
When You Need to Be Named as an Additional Insured
Additional insured status makes sense when one party could face liability because of another party’s work. These are the most common scenarios in California business relationships.
General contractors hiring subcontractors. A GC on a construction project typically requires every subcontractor to name the GC as an additional insured. If the sub’s work causes injury or property damage, the GC wants the ability to tender the claim to the sub’s insurer rather than their own.
Property owners hiring contractors or service providers. A building owner who hires a roofing company, janitorial service or landscaper should be named as an additional insured on the vendor’s policy. If someone is injured on the property because of the vendor’s work, the property owner wants that vendor’s insurance to respond first.
Landlords requiring tenant coverage. Commercial landlords in California often require tenants to carry general liability insurance and name the landlord as an additional insured. This protects the landlord if a customer slips and falls inside the tenant’s space.
Clients hiring professional service firms. A company that hires a marketing agency, IT consultant or staffing firm to work on-site may want additional insured status on that firm’s policy to cover any liability that spills over from the vendor’s operations.
When a Certificate of Insurance Is Enough
A certificate of insurance is sufficient when you need to confirm that another party carries insurance but your risk of being pulled into a claim from their work is low.
Verifying vendor compliance. If your company policy requires all vendors to carry a minimum level of insurance, collecting certificates is the standard way to verify that. You are checking a box, not seeking coverage for yourself.
Lease agreements with low-risk tenants. A commercial landlord renting office space to an accounting firm may decide that a COI showing the tenant has general liability coverage is enough, without requiring additional insured status.
Delivery and supply relationships. If a supplier delivers materials to your warehouse, asking for a certificate showing they carry commercial auto and general liability insurance is common practice. You may not need to be on their policy as an additional insured unless they are performing work on your premises.
Business-to-business contracts. Many B2B contracts include a requirement to provide proof of insurance. Often a certificate is all that is needed unless the contract involves physical work on the other party’s property or a significant shared liability exposure.
How to Request or Provide Additional Insured Status
If you need to add someone as an additional insured on your policy, contact your insurance broker or carrier. They will issue the appropriate endorsement and update your certificate of insurance to reflect the additional insured’s name.
The process typically involves providing the full legal name and address of the party to be added, the specific project or contract the endorsement relates to, and the effective dates. Your carrier may charge a small fee for the endorsement, or it may be included in your policy at no extra cost depending on your coverage.
If you are the one requesting additional insured status, be specific about what you need. A request that says “add us as additional insured” without specifying the endorsement form can result in coverage that is narrower than you expected. Ask for a CG 20 10 (ongoing operations) and CG 20 37 (completed operations) if you want both.
Once the endorsement is in place, ask for an updated certificate of insurance that shows your name in the additional insured field and references the endorsement. Keep this on file for the duration of the contract or project.
California-Specific Considerations
California law adds some nuances to how additional insured coverage works in practice.
Anti-indemnity statute (Civil Code Section 2782). California limits the ability of parties in construction contracts to shift liability entirely to subcontractors. Under this statute, a construction contract cannot require a subcontractor to indemnify the general contractor or property owner for the GC’s or owner’s own active negligence. This affects how additional insured coverage interacts with indemnification clauses in construction contracts.
Consistent required limits. While there is no California law dictating minimum additional insured coverage amounts, industry norms in the state typically call for $1 million per occurrence and $2 million aggregate in general liability. Construction projects and government contracts often require higher limits, sometimes $5 million or more through an umbrella policy.
Contractor licensing requirements. The California Contractors State License Board (CSLB) requires licensed contractors to carry workers’ compensation insurance (if they have employees) but does not mandate general liability insurance. However, most project owners and GCs require it contractually, and additional insured requirements flow from those contracts.
Common Mistakes to Avoid
Assuming a certificate provides coverage. This is the most common misunderstanding. A certificate holder has no coverage rights. If you need protection, you need to be named as an additional insured through a policy endorsement.
Not verifying the endorsement was actually issued. A certificate can list you as an additional insured, but if the actual endorsement was never added to the policy, you may have no coverage when a claim arises. Request a copy of the endorsement itself, not just the certificate.
Letting certificates expire without renewal. Certificates have expiration dates. If a vendor’s policy renews and you do not get an updated certificate and endorsement, your additional insured status may have lapsed. Set calendar reminders to request updated documentation before expiration dates.
Using the wrong endorsement form. A CG 20 10 endorsement from 2004 provides broader coverage than the 2019 version. The specific edition of the endorsement matters. Work with your broker to understand what version is being offered and whether it meets your contractual requirements.
Frequently Asked Questions
Does being an additional insured cost the named insured money?
Sometimes. Some carriers include blanket additional insured coverage in their standard policy at no extra charge. Others charge a fee per endorsement, typically $25 to $50. Large projects or higher-risk endorsements may cost more. Your broker can tell you what your specific policy allows.
Can an additional insured be removed from a policy?
Yes. The named insured can ask their carrier to remove an additional insured endorsement at any time, unless the contract requires it to remain in place. If you are the additional insured, your contract should specify how long the endorsement must remain active, including any completed operations coverage period.
Does a certificate of insurance guarantee the policy will not be canceled?
No. The standard ACORD 25 certificate form explicitly states that it is issued as a matter of information only and confers no rights. While some certificates include a provision for cancellation notice, the insurer’s obligation to provide that notice has been a subject of legal dispute and should not be relied upon as a guarantee.
Can I be both a certificate holder and an additional insured?
Yes, and this is the most common arrangement. When you are named as an additional insured, you typically receive a certificate of insurance that documents your additional insured status. You are both the certificate holder (you have the COI) and an additional insured (you have coverage under the endorsement).
What is a waiver of subrogation, and is it the same as additional insured?
No. A waiver of subrogation prevents an insurer from seeking reimbursement from a third party after paying a claim. It is a separate endorsement from additional insured status. Some contracts require both. For example, a landlord may require a tenant to name them as an additional insured and also provide a waiver of subrogation on the tenant’s policy.
Do I need additional insured status on a workers’ compensation policy?
No. Workers’ compensation policies do not have additional insured endorsements. If you need protection against employee injury claims from a subcontractor’s workers, the correct approach is to verify that the sub carries adequate workers’ comp coverage and to include indemnification provisions in your contract.
Get Your Certificates and Coverage Sorted
Dream Safe helps California businesses set up the right insurance structure, from certificates to additional insured endorsements, so every contract starts on solid footing.
