What Is the Commercial General Liability CG 20 10 11 85?

Construction contracts are filled with insurance requirements that can make or break a project. One endorsement, in particular, keeps showing up in contract specifications across the country, and it's been doing so for over four decades. The CG 20 10 11/85 endorsement, an additional insured form tied to commercial general liability policies, remains one of the most requested and most misunderstood documents in the construction industry. If you're a subcontractor, general contractor, or project owner, understanding what this form does and why it matters could save you from a costly coverage gap when a claim hits. The 11/85 edition carries a reputation for providing the broadest additional insured protection available, which is precisely why so many upstream parties still demand it by name. But getting your hands on this specific edition isn't as simple as calling your insurance carrier. Many insurers no longer offer it, and the versions that replaced it come with restrictions that can leave additional insureds exposed. We see this play out regularly at Fusco Orsini & Associates, where clients come to us after discovering their current endorsement doesn't match what their contract requires. That mismatch can delay projects, trigger breach-of-contract disputes, or leave someone without coverage after an injury on the jobsite. Here's what you need to know about this endorsement, why it still matters, and how to handle the challenges of securing it in 2026.

Understanding the CG 20 10 11 85 Endorsement

The CG 20 10 (11/85) endorsement is an ISO-standardized form that adds a person or organization as an additional insured to a named insured's commercial general liability policy. Its purpose is straightforward: it transfers a portion of liability risk from one party (typically a general contractor or property owner) to the subcontractor's insurance policy. When the additional insured gets sued for bodily injury or property damage arising out of the named insured's work, the subcontractor's policy responds.

What makes this form commercially significant is the scope of coverage it provides. The endorsement uses broad language that doesn't impose the same restrictions found in later ISO editions. This breadth is the reason the 11/85 version remains the gold standard for risk transfer in construction, even though ISO has revised the form multiple times since.

The History and Significance of the 11 85 Edition

ISO released the CG 20 10 in November 1985 as part of a broader overhaul of commercial general liability policy forms. At the time, the endorsement's language was considered standard. It granted additional insured status for liability arising out of the named insured's ongoing operations performed for the additional insured. The form didn't carve out completed operations, and it didn't limit coverage to situations where the named insured was solely negligent.

Over the following decades, ISO revised the endorsement several times, most notably in 1993, 2004, and 2013. Each revision narrowed the scope. The 2004 edition, for example, explicitly excluded completed operations coverage, and the 2013 edition added language requiring the additional insured's liability to be caused "in whole or in part" by the named insured's acts or omissions. These changes made the 11/85 edition uniquely broad because it uses the term "your work" without the same limiting qualifiers, providing a safety net that later forms intentionally removed.

Why General Contractors and Owners Require It

General contractors and property owners face enormous liability exposure on construction projects. A single fall from scaffolding can generate a claim worth hundreds of thousands of dollars, and the injured party's attorney will name every entity connected to the project. By requiring subcontractors to add them as additional insureds under the 11/85 edition, GCs and owners gain access to the subcontractor's policy limits without the restrictions imposed by newer forms.

This isn't just about preference. Many construction contracts, particularly on large commercial and public works projects, specifically name the CG 20 10 (11/85) as the required endorsement. The contract language often states that no substitute will be accepted. The reasoning is simple: indemnity clauses and additional insured endorsements are the two pillars of risk transfer in construction, and the 11/85 edition provides the strongest version of the second pillar.

Key Coverage Features for Additional Insureds

The CG 20 10 11/85 provides coverage to additional insureds that is both broader and less conditional than what you'll find in post-2000 editions. Understanding the specific features helps you evaluate whether your current endorsement actually meets your contract requirements.

Ongoing Operations vs. Completed Operations

One of the most critical distinctions in additional insured coverage is the difference between ongoing and completed operations. Ongoing operations coverage applies while work is actively being performed. If a subcontractor's employee drops a tool and injures a passerby during construction, the additional insured's coverage triggers under ongoing operations.

Completed operations coverage applies after the work is finished. If a defectively installed HVAC system causes a fire six months after project completion, that's a completed operations claim. The 11/85 edition's broad "arising out of your work" language has been interpreted by many courts to encompass both ongoing and completed operations. Later editions, particularly the 2004 revision, split these coverages into separate endorsements, requiring the CG 20 37 for completed operations protection. This split means that if you're only carrying a post-2004 CG 20 10 without the companion CG 20 37, your additional insured has a gap in coverage after the project wraps up.

Vicarious Liability and Direct Negligence

The 11/85 edition doesn't restrict coverage to situations where the named insured is the sole cause of the loss. This matters because claims on construction sites often involve shared fault. A general contractor might be partially liable for failing to enforce safety protocols, while the subcontractor is partially liable for the actual unsafe condition.

Under the 11/85 form, the additional insured can receive coverage even when their own negligence contributed to the loss, as long as the claim arises out of the named insured's work. Post-2013 editions require the additional insured's liability to be caused "in whole or in part" by the named insured's acts, which courts in some jurisdictions have interpreted to exclude coverage for the additional insured's sole negligence. That distinction has real financial consequences, particularly in states like California and New York where construction defect litigation is aggressive and defense costs alone can exceed $50,000.

Comparing the 11 85 Edition to Modern Endorsements

The differences between the 11/85 edition and its successors aren't academic. They determine whether a claim gets paid or denied. Here's how the editions stack up.

Table: CG 20 10 11 85 vs. Post-2000 ISO Forms

The table makes one thing clear: each revision reduced the additional insured's protection. If your contract calls for the 11/85 edition and you're providing a 2013 form, you're likely in breach, and your upstream partner may not have the coverage they're counting on.

Common Challenges in Obtaining This Coverage

Securing the actual 11/85 endorsement has become one of the more frustrating tasks in construction insurance. The form is over 40 years old, and the insurance market has moved on in many ways.

Insurance Carrier Restrictions and Availability

Most major insurance carriers stopped issuing the CG 20 10 (11/85) years ago. ISO's current catalog offers the 04/13 edition as the standard, and many carriers have adopted their own proprietary additional insured endorsements that track the newer, narrower language. If you're working with a large national carrier, there's a good chance they'll tell you the 11/85 simply isn't available on their platform.

That said, some surplus lines carriers and specialty construction insurers still offer the 11/85 or a manuscript endorsement with equivalent breadth. This is where working with a brokerage that specializes in construction risk, like Fusco Orsini & Associates, makes a measurable difference. We maintain relationships with carriers that can still write this coverage, and we know which manuscript forms will actually hold up if a claim goes to litigation.

The Risk of Using Equivalent Language

When the 11/85 isn't available, some brokers attempt to use endorsements with "equivalent" or "substantially similar" language. This approach carries real risk. Courts interpret policy language strictly, and a form that's close to the 11/85 but contains even minor differences can produce a different outcome in a coverage dispute.

One common pitfall is a proprietary endorsement that includes a causation limitation similar to the post-2004 ISO forms while marketing itself as providing broad coverage. The endorsement title might even reference the CG 20 10, but the operative language tells a different story. Always read the actual endorsement text, not just the form number. If your contract requires the 11/85 and your certificate of insurance shows a different edition, bring it to your broker's attention before the project starts.

Frequently Asked Questions About CG 20 10 11 85

Is the CG 20 10 (11/85) still valid if my carrier issues it? Yes. The edition date refers to when ISO published the form, not an expiration. If your carrier still offers it, the endorsement is fully enforceable on a current policy.

Can I satisfy an 11/85 contract requirement with a newer edition? Not without the other party's written consent. The contract specifies the 11/85 for a reason, and substituting a narrower form could put you in breach.

Does the 11/85 cover completed operations? Many courts have interpreted its broad language to include completed operations, though this varies by jurisdiction. To be safe, ask your broker whether your state's case law supports that interpretation.

What happens if I can't get the 11/85 from my carrier? You have a few options: switch to a carrier that offers it, request a manuscript endorsement with equivalent breadth, or negotiate the contract requirement with the GC or owner.

Who pays for the additional insured endorsement? The named insured, typically the subcontractor, pays for the endorsement as part of their policy. The cost is usually modest, often $25 to $100 per endorsement, but the risk transfer value it provides is substantial.

Does the endorsement give the additional insured their own policy? No. It adds them to the named insured's existing policy. The additional insured shares the policy's limits, and coverage only applies to claims arising from the named insured's work.

What This Means for Your Business

The CG 20 10 (11/85) endorsement isn't just a piece of paper your GC is asking for to check a box. It's a coverage mechanism that determines who pays when something goes wrong on a project. The broad language of the 11/85 edition provides additional insureds with protection that newer forms have systematically stripped away, and that's exactly why it keeps showing up in contract specifications decades after its release.

If you're a subcontractor, audit your current endorsements against your contract requirements right now. Don't wait until a claim forces the issue. If you're a GC or owner, verify that the certificates you're receiving actually reflect the 11/85 edition and not a narrower substitute.

At Fusco Orsini & Associates, we help construction clients match their insurance program to their contractual obligations every day. If you're unsure whether your current CGL endorsement meets the mark, reach out for a policy review before your next project kicks off. The cost of getting it right upfront is a fraction of what a coverage gap will cost you after a loss.