Why Contractors Need Additional Insured Endorsements

If you are a subcontractor working in the commercial construction space, you have almost certainly been asked to provide a certificate of insurance showing a general contractor or property owner as an Additional Insured. But what exactly does that mean — and why does it matter so much?

What Is an Additional Insured?

An Additional Insured (AI) is a person or entity that is added to someone else's insurance policy and is extended coverage under that policy. When a GC requires a subcontractor to name them as an Additional Insured, they are asking for protection under the sub's General Liability policy.

Why General Contractors Require It

General contractors carry significant liability on every project. If a subcontractor's work causes an injury or property damage, the GC may be named in the resulting lawsuit even if the GC was not directly at fault. By being named as an Additional Insured on the sub's GL policy, the GC has a direct line of coverage and defense under that policy.

The Importance of Endorsement Language

Not all Additional Insured endorsements are created equal. There are two primary types:

Ongoing Operations: Covers the GC for claims arising from the sub's work while it is actively in progress.

Completed Operations: Covers the GC for claims arising from the sub's completed work — even after the project is finished. This is critical because construction defect claims often surface months or years after project completion.

Many contracts require both ongoing AND completed operations coverage. Make sure your policy endorsement includes both — or that you understand what is excluded.

Primary and Non-Contributory Language

Many contracts also require that the sub's policy respond on a primary and non-contributory basis — meaning the sub's insurance pays first before the GC's own policy contributes. Without this endorsement, carriers may try to share the loss, which can delay defense and create disputes.

Common Certificate Mistakes

• Requesting a certificate without confirming the actual endorsement is on the policy
• Using a blanket AI endorsement that does not satisfy specific contractual language
• Failing to renew the endorsement when the policy renews

Work With Capital & Co

Capital & Co can review your contracts, confirm your endorsements are properly structured, and ensure your certificate of insurance satisfies your contractual obligations before you step foot on the job site.