A certificate of insurance proves a policy exists. Additional insured status extends that policy's protection to someone else — usually the general contractor or property owner. They are not the same thing, and confusing them is one of the most expensive mistakes in construction. A certificate is a snapshot; the actual coverage lives in the endorsements attached to the policy. If a GC collects a certificate that says "additional insured" but the endorsement was never added, nobody is protected — and everyone finds out on the day of a claim.
A certificate of insurance — the standard ACORD form everyone emails around — is a one-page summary of what policies are in force. It lists the carrier, the policy numbers, the limits, and the effective dates. That's it. Right on the face of every certificate is a disclaimer, in plain print, saying the document confers no rights on the holder and does not amend, extend, or alter the coverage in the policies.
Read that twice, because it's the whole point. A certificate is evidence, not coverage. If a subcontractor's policy has lapsed, excludes the type of work, or was canceled last week, the certificate sitting in the GC's project file does absolutely nothing. It is a photograph of coverage that may or may not still exist.
Additional insured (AI) status is a real, contractual change to the policy. It is added by an endorsement — a form the carrier attaches that names another party as an insured under the policy for claims arising out of the named insured's work.
On a general liability policy, the workhorse forms are:
You usually need both. A GC who only gets ongoing-operations status is exposed on exactly the kind of latent-defect claim that shows up months after the punch list is signed. This is a common and costly gap in Southeast construction contracts, and it is invisible on a certificate unless you go check the endorsements themselves.
The logic is pure risk transfer. When a subcontractor's crew causes an injury or damages property, the lawsuit rarely stops at the sub. The injured party names everyone upstream — the general contractor, the developer, the property owner — because that's where the deeper pockets and the bigger policies are.
Additional insured status pushes that defense and payment down to the policy of the party actually responsible. Instead of the GC's own limits eroding and their loss runs taking the hit (which raises their premium), the sub's policy answers for the sub's work. A GC who collects certificates but never confirms the endorsements thinks they've transferred that risk. They haven't. They've collected paper.
Most Southeast subcontracts require three things in the same breath. Each one has to be built into the policy by endorsement — none of them exists just because the words appear in a certificate's description box.
| Requirement | What it means | How it's granted |
|---|---|---|
| Additional insured | Extends your coverage to the GC/owner for your work | Endorsement (CG 20 10 + CG 20 37) |
| Primary & non-contributory | Your policy pays first and in full; theirs isn't tapped | Endorsement |
| Waiver of subrogation | Your insurer won't sue the GC/owner to recover a paid loss | Endorsement |
Primary and non-contributory means your policy pays first and doesn't ask the GC's policy to contribute — keeping their coverage untouched. A waiver of subrogation stops your carrier from turning around and suing the GC or owner to recover what it paid, so one covered loss doesn't spiral into cross-lawsuits between the project's insurers. All three are contractual promises you make when you sign. If the endorsements aren't on your policy, you are in breach of your own contract the moment you sign it — and exposed on the claim.
A framing sub signs a subcontract requiring additional insured status, ongoing and completed operations, primary and non-contributory, and a waiver. The sub emails over a clean-looking certificate. Eighteen months after the house is finished, a stair railing the sub installed fails and someone is badly hurt. The homeowner sues the builder and the sub.
The builder tenders the claim to the sub's carrier as an additional insured — and the carrier declines, because the policy only carried CG 20 10 (ongoing operations), not CG 20 37 (completed operations). The job was long finished. Now the builder's own policy takes the loss, their limits erode, their loss runs get ugly, and their renewal premium jumps. The certificate said everything was fine. The endorsement said otherwise. The endorsement wins, every time.
Five moves that keep the paperwork from becoming a liability of its own:
For contractors doing public, school, DOT, or federal work, these same contracts usually require bonding too — see our plain-English explainer on payment vs. performance vs. bid bonds and how they fit alongside your insurance requirements.
Bettr Coverage is an independent commercial insurance agency serving Georgia and the wider Southeast. We write every line of commercial coverage — workers' comp, general liability, commercial auto, property, umbrella, and cyber — and we handle the certificate-and-endorsement machinery that keeps contractors compliant with their contracts. Send us the subcontract before you sign it; we'll confirm the required additional insured, primary & non-contributory, and waiver-of-subrogation endorsements are actually on your policy — not just typed on a certificate. It's the difference between paperwork that protects you and paperwork that only looks like it does.
Send us the language before you sign. Bettr Coverage confirms your additional insured, waiver, and primary & non-contributory endorsements are really in place — one agency, every commercial line, checked against your actual contracts.
Get a free contract & coverage reviewA certificate proves a policy exists and grants no coverage to anyone. Additional insured status is an actual endorsement that extends the policy's protection to another party, like the GC or owner. Only the endorsement is real coverage.
No. Every ACORD certificate states in print that it confers no rights and doesn't amend the policy. It's informational only. Coverage lives in the policy and its endorsements.
Commonly CG 20 10 for ongoing operations and CG 20 37 for completed operations. You usually need both — completed operations covers claims that surface after the job is done.
Your policy pays first and in full on a covered claim and doesn't ask the additional insured's policy to contribute. It must be added by endorsement to be effective.
It stops your insurer from suing another party (the GC or owner) to recover what it paid on a claim. Construction contracts routinely require it, and it must be endorsed onto the policy.
That you can meet the limits, that the additional insured (ongoing + completed ops), primary & non-contributory, and waiver requirements are added by endorsement, and that indemnity language doesn't reach past what insurance covers. Send it to your agent first.
For general information only. Not a quote, contract of insurance, or legal advice. Endorsement form references (e.g., CG 20 10, CG 20 37) describe common ISO forms; actual coverage, editions, and availability vary by carrier and policy. Contract and indemnity language should be reviewed by a licensed agent and, where appropriate, an attorney. Coverage subject to policy terms and carrier appetite.