Additional Insured vs Certificate Holder: One Grants Coverage, One Doesn't

These two boxes sit inches apart on the same certificate. One of them extends real insurance coverage to another company. The other means they get a copy of a PDF. Businesses confuse them constantly, and the confusion is expensive in both directions — clients believe they are protected when they are not, and vendors believe they have complied when they have not.

The Difference in One Table

The single most important consequence: ticking a box on a certificate does not make anyone an additional insured. The endorsement either exists in the policy or it does not. The ACORD form says this explicitly — if the certificate holder is an additional insured, the policy must contain additional insured provisions or be endorsed, and a statement on the certificate does not stand in for the endorsement.

CG 20 10 and CG 20 37: Why Contracts Name Two Forms

When a construction contract asks for additional insured status "including ongoing and completed operations," it is asking for two endorsements, and the reason is timing.

• CG 20 10 covers ongoing operations — claims arising while the work is being performed. A visitor trips over your extension lead during the job.
• CG 20 37 covers completed operations — claims arising after the work is finished and handed over. The balcony you installed fails two years later.

This is the gap that catches subcontractors most often. Construction defect claims almost never surface during the job; they surface years later, which is precisely when a CG 20 10-only endorsement has stopped responding for the general contractor. A GC who accepted ongoing-operations-only status and thought they were covered discovers the gap at the worst possible moment.

Two related clauses usually travel with these:

• Primary and non-contributory — your policy pays first and does not ask the client's own insurer to share. Without it, the two insurers can argue about order of payment while the claim sits.
• Waiver of subrogation — your insurer gives up its right to recover from the client after paying a claim. Without it, your carrier can pay out and then sue the very client you were trying to protect, which defeats the point of the arrangement.

The Cost Nobody Tells the Vendor About

Adding an additional insured typically costs $100 to $500 a year. That is the visible price, and it is not the important one.

The real cost is that additional insureds share your limits. If you carry $1M per occurrence and a claim from your work names both you and the client, that single $1M answers for both parties. Add five clients as additional insureds across five contracts and you have not multiplied your coverage — you have divided it five ways in any year where multiple claims land.

Two practical implications follow. First, a business with many additional insured relationships should think about limits differently from one with none; this is a common reason to add an umbrella policy, and you can size one with our umbrella insurance calculator. Second, a claim brought by or against an additional insured hits your loss history and your renewal pricing, not theirs. You are absorbing their claims experience into your own record.

Blanket vs Scheduled: Which You Want

There are two ways to grant additional insured status, and if you sign more than a couple of contracts a year, one of them is much better.

• Scheduled endorsements name each party individually. Every new client means contacting your broker, paying a fee, and waiting for the endorsement to issue — and forgetting one means a contract breach.
• Blanket endorsements automatically extend status to any party you are required by written contract to add. One endorsement covers every client, past and future, with no per-client administration.

A blanket endorsement costs more up front and is worth it for almost any business signing contracts regularly. The one thing to check is the trigger wording: blanket endorsements generally apply only where a written contract executed before the loss required the status. A verbal agreement, or a contract signed after the incident, typically will not trigger it.

What to Do on Each Side

If a client is asking you to add them: confirm which forms the contract names, ask your broker whether you have blanket or scheduled coverage, get the endorsement added rather than just having the certificate describe it, and factor the shared-limits effect into whether your current limit is still adequate.

If you are the one requiring it: being named certificate holder is not enough. Ask for the endorsement pages themselves, check whether you have ongoing operations only or completed operations as well, and confirm that primary and non-contributory and waiver of subrogation are in place if your contract asked for them. For how to read the rest of the certificate, see certificate of insurance explained.

Bottom Line

Certificate holder means you get the paperwork. Additional insured means you get the coverage, and only if the endorsement is actually in the policy. If your contract asked for completed operations, check that CG 20 37 or its equivalent is present rather than assuming CG 20 10 covers it — that single gap is the most common failure in this area. And if you are the vendor granting the status, remember that everyone you add is drawing from the same limit you are. For what the rest of the clause costs, see our line-by-line guide to contract insurance requirements.

Frequently Asked Questions

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

A certificate holder simply receives a copy of the certificate and gets no coverage at all. An additional insured has been added to the policy by endorsement and can file a claim directly against it, typically including defence costs. Ticking a box on a certificate does not create additional insured status - the endorsement either exists in the policy or it does not, and the ACORD form says so explicitly.

What is the difference between CG 20 10 and CG 20 37?

CG 20 10 covers ongoing operations, meaning claims arising while the work is being performed. CG 20 37 covers completed operations, meaning claims arising after the work is finished and handed over. Construction defect claims usually surface years after completion, so a contract asking for additional insured status including completed operations needs both forms. Accepting CG 20 10 alone is the most common gap in this area.

How much does it cost to add an additional insured?

Typically $100 to $500 a year. The larger hidden cost is that additional insureds share your policy limits - if you carry $1 million per occurrence and a claim names both you and the client, that single limit answers for both. Adding several clients across several contracts divides your coverage rather than multiplying it, and claims involving them affect your loss history and renewal pricing.

Should I get a blanket or scheduled additional insured endorsement?

Blanket, for almost any business signing contracts regularly. A scheduled endorsement names each party individually, so every new client means contacting your broker, paying a fee, and risking a contract breach if one is forgotten. A blanket endorsement automatically extends status to any party you are required by written contract to add. Check the trigger wording, since blanket forms generally require a written contract executed before the loss.

Does being named additional insured affect my own insurance rates?

It can. A claim brought by or against an additional insured is made against your policy, so it enters your loss history and can affect your renewal pricing - you are effectively absorbing their claims experience into your own record. This is separate from the shared-limits issue and is one reason businesses with many additional insured relationships often add an umbrella policy.

This content is for informational purposes only and does not constitute insurance, financial, or legal advice. Endorsement availability, wording, and pricing vary by carrier and state, and contract terms are governed by the specific agreement you sign. Cost figures shown are illustrative industry ranges rather than quotes. Have a licensed broker review the actual insurance requirements in your contract before you sign or bind coverage.