Additional Insured Endorsements
Think a certificate of insurance protects you? Learn the most common additional insured mistakes contractors make and how to avoid them.
The good news? Most of these mistakes are easy to avoid.
Here are seven common additional insured mistakes contractors make and what you can do to protect your business.
What Is an Additional Insured?
An additional insured is another person or business that receives certain liability protection under your insurance policy.
For contractors, this is often a:
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General contractor
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Property owner
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Project manager
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Business client
For example, if your work causes property damage and the property owner gets sued, your liability policy may provide protection to that owner, depending on the endorsement and circumstances.
That is why many construction contracts require additional insured coverage.
7 Common Additional Insured Mistakes
1. Thinking a Certificate of Insurance Is Enough
This is one of the biggest mistakes contractors make.
A Certificate of Insurance (COI) is proof of certain insurance information. It is not the insurance policy itself.
A certificate does not automatically add someone as an additional insured.
Certificate of Insurance
Shows policy information but does not create or change coverage.
Additional Insured Endorsement
Provides additional insured status when the endorsement’s requirements are met.
What to do: Ask your insurance agent to confirm that the proper additional insured endorsement applies. Do not rely on the certificate alone.
2. Not Requesting the Actual Endorsement
Many contractors request a certificate and assume everything is taken care of.
Then the general contractor asks for the actual endorsement before work can begin.
Now the project is delayed while everyone scrambles to get the paperwork.
What to do: Request the required endorsements before the project starts. Make sure they satisfy the contract requirements.
3. Forgetting About Completed Operations
Your work does not stop creating potential liability when the job is finished.
Imagine you install plumbing in a commercial building.
A year later, a connection fails and causes major water damage.
The property owner gets sued and looks to your insurance for protection.
Here is where completed operations coverage becomes important.
Ongoing Operations
Liability connected to work while the project is underway.
Completed Operations
Certain liability claims arising after the work is finished.
Not every additional insured endorsement includes completed operations protection.
What to do: Check whether your contract requires both ongoing and completed operations coverage. Ask your agent if separate endorsements are needed.
4. Not Matching the Insurance Requirements in the Contract
Being listed as an additional insured might only be one part of the contract.
Your client may also require:
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Primary and noncontributory coverage: Your policy generally responds before the additional insured’s own insurance for applicable covered claims, subject to terms.
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Waiver of subrogation: Your insurer agrees to waive certain recovery rights against a specified party.
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Specific liability limits: Minimum insurance amounts required by the contract.
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Notice of cancellation: Certain notification requirements if coverage is canceled.
These requirements are not automatically satisfied just because someone is an additional insured.
What to do: Send your agent the insurance requirements section of the contract before signing or starting work.
5. Assuming Additional Insured Coverage Protects Against Everything
Additional insured coverage is not unlimited.
It generally applies to certain claims connected to your work or operations, as described in the endorsement.
For example, if the property owner causes an unrelated accident, your insurance may not cover them simply because they are listed as an additional insured.
What to do: Understand what your endorsement actually covers. Coverage depends on the policy wording, facts of the claim, and applicable law.
6. Thinking Additional Insureds Get Their Own Policy Limits
Adding another business as an additional insured generally does not give them a separate set of liability limits.
They typically share the applicable limits of your policy.
SIMPLE EXAMPLE
$1,000,000
General liability per-occurrence limit
Your business
Additional insured
If both you and the additional insured are involved in the same major claim, the available limit may have to cover both parties.
What to do: Review your liability limits and consider whether your projects justify higher limits or umbrella insurance.
7. Ignoring Your Subcontractors
If you hire subcontractors, you should be checking their insurance, too.
Imagine you hire a subcontractor to complete electrical work. Their mistake causes a fire.
Without proper insurance requirements, you could face additional financial exposure.
Before a subcontractor starts work, request:
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A current Certificate of Insurance
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Confirmation of an additional insured endorsement protecting your business
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Appropriate general liability limits
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Completed operations additional insured coverage, if required
What to do: Verify subcontractor insurance requirements before work begins and maintain documentation.
Quick Checklist Before Starting a Job
Contractor Insurance Checklist
1. Read the insurance requirements in your contract.
Final Thoughts: Get It Right Before a Claim
Additional insured requirements may seem like a small detail, but they can make a big difference when something goes wrong.
The biggest mistake is assuming your certificate of insurance guarantees the protection your contract requires.
Before your next project, have your insurance agent review the contract requirements and confirm the proper endorsements are in place.
A few minutes of preparation could help prevent costly problems later.






