Additional Insured Status Is Not a Silver Bullet: What GCs and Specialty Contractors Get Wrong About Subcontractor Insurance Requirements
By Justin MacKenzie | General Insurance Topics
Key Takeaways
Additional insured status on a subcontractor's policy does not guarantee immediate defense or indemnification — the terms of that policy, including any self-insured retention or deductible, determine when and how coverage actually responds.
A large self-insured retention on a subcontractor's policy can effectively delay or eliminate coverage for the additional insured if the subcontractor lacks the financial resources to satisfy it.
Collecting a certificate of insurance confirms a policy exists — it does not confirm the policy will respond to a specific claim, at what point it responds, or whether the subcontractor can fund their own obligations under it.
The due diligence required to actually protect yourself through subcontractor insurance requirements goes significantly beyond collecting a certificate and moving on.
Requiring additional insured status on your subcontractors' general liability policies is standard practice in construction. Most GCs do it on every project without much thought — it goes in the subcontract template, a certificate comes back, and everyone moves on. The assumption is that if something goes wrong and the sub caused it, their policy will step in and handle it.
That assumption is wrong more often than most contractors realize. Additional insured status is a meaningful protection — but it is only as valuable as the policy behind it. And the policy behind it may contain terms, structures, and financial requirements that fundamentally change when and whether coverage responds to your claim.
This article explains the specific ways additional insured status can fail to deliver the protection contractors expect — with particular attention to self-insured retentions, deductibles, and the financial capacity of the subcontractor behind the policy.
What Additional Insured Status Actually Gives You
When you are named as an additional insured on a subcontractor's CGL policy, you gain the right to be defended and indemnified under that policy for covered claims arising from the subcontractor's work. That is genuinely valuable. If a claim arises from your sub's operations and you are named in the lawsuit, the sub's carrier has an obligation to defend you and pay covered damages on your behalf — subject to the policy's terms, conditions, exclusions, and limits.
The critical phrase in that sentence is subject to the policy's terms, conditions, exclusions, and limits. Additional insured status does not give you a blank check against the subcontractor's policy. It gives you access to that policy on the same terms that apply to the named insured — which means that anything in the policy that would limit or delay coverage for the named insured also limits or delays coverage for you as an additional insured.
Most contractors understand that limits matter — if the sub has a one million dollar policy and the claim is worth five million dollars, there is a gap. What fewer contractors understand is that the structure of the policy — specifically how deductibles and self-insured retentions work — can affect not just the amount of coverage available but whether coverage responds at all in the early stages of a claim.
Deductibles vs. Self-Insured Retentions: A Critical Distinction
Most contractors are familiar with deductibles — the amount the insured pays before the insurance responds. What many do not fully understand is the distinction between a deductible structure and a self-insured retention structure, and why that distinction matters significantly when you are relying on someone else's policy as an additional insured.
How deductibles work
Under a standard deductible structure, the carrier steps in immediately to defend the claim and manage the litigation. The insured's deductible obligation is settled later — typically at claim resolution — when the insured reimburses the carrier for the deductible amount. From an additional insured's perspective, a deductible structure means the carrier is in the picture from day one. Defense is funded. The claim is being managed. The insured's financial capacity to pay the deductible affects the carrier's ultimate recovery but does not delay the defense.
How self-insured retentions work
A self-insured retention works differently. Under an SIR structure, the carrier does not step in until the insured has paid the full SIR amount out of their own pocket. The insured funds their own defense, pays their own claims, and satisfies their own settlement obligations up to the SIR amount — all before the carrier contributes a single dollar. The carrier's policy sits above the SIR like an excess policy, waiting until the retention is exhausted before activating.
For an additional insured on a policy with a large SIR, the implication is significant. When you tender the defense of a claim to the subcontractor's carrier, the carrier can legitimately respond that coverage has not yet been triggered — because the SIR has not been satisfied. You are not getting a defense from the carrier until the subcontractor has funded the full retention amount. If the SIR is five hundred thousand dollars and the subcontractor does not have five hundred thousand dollars in liquid capital, that defense may never materialize in any meaningful way.
The Financial Capacity Problem
A self-insured retention is only as strong as the entity behind it. Large SIRs — one hundred thousand, five hundred thousand, or more — are common on policies written for specialty contractors in higher-risk categories. Carriers use SIRs to share risk with the insured and to ensure that the insured has skin in the game on claims. For large, financially stable contractors, an SIR is manageable. For smaller specialty subcontractors operating on thin margins with limited working capital, a large SIR can be functionally impossible to satisfy.
Consider the position of a general contractor who has named a specialty geotechnical subcontractor as an additional insured on the sub's CGL policy. A claim arises. The GC tenders the defense to the sub's carrier. The carrier confirms coverage is available — above the SIR. The sub's SIR is three hundred thousand dollars. The sub is a ten-person operation doing four million dollars a year. They do not have three hundred thousand dollars in available capital to fund the SIR. The carrier waits. The claim develops. Months pass without a meaningful defense being mounted. Costs accumulate on the GC's side while the SIR situation is unresolved.
In the worst version of this scenario, the subcontractor cannot satisfy the SIR, the claim grows, and the sub eventually becomes insolvent under the weight of uninsured claim costs. At that point the GC has an additional insured endorsement against a policy held by a company that no longer exists in any meaningful financial sense. The protection they thought they had evaporates.
This is not a theoretical concern. It is a scenario that plays out in construction litigation with enough regularity that experienced risk managers have added SIR review to their standard subcontractor qualification processes. The question is not just whether the sub has insurance — it is whether the sub has the financial capacity to make that insurance work.
Not sure if your subcontractors' policies are structured to actually protect you?
Get a no-obligation review of your subcontractor insurance requirements. justin@fstwest.com
Other Policy Terms That Limit Additional Insured Protection
SIRs are the most significant structural issue but they are not the only policy term that can limit what additional insured status actually delivers. Several other provisions deserve attention when reviewing a subcontractor's certificate and underlying policy.
Exclusions that apply to additional insureds. The additional insured endorsement on a subcontractor's policy may include exclusions that are not on the named insured's coverage — for example, excluding additional insured coverage for the additional insured's own negligence. Whether your state permits this type of exclusion varies, but it is worth confirming that the additional insured endorsement actually covers the scenarios you are most concerned about.
Limits that are shared with the named insured. Additional insured coverage does not come with its own separate limit. You share the subcontractor's policy limits with the named insured and any other additional insureds on the policy. If the sub has a one million dollar per occurrence limit and a significant claim involving the named insured has already eroded part of that limit, you may find less coverage available than you expected when your claim is tendered.
Completed operations scope of the additional insured endorsement. Some additional insured endorsements cover only ongoing operations — the work being performed while the sub is actively on site — and do not extend to completed operations. If a claim arises after the project is finished, the additional insured endorsement may not respond at all. Confirming that the endorsement includes completed operations coverage is essential for any project where the work creates long-tail liability.
Policy exclusions that apply to the underlying work. If the subcontractor's policy has exclusions relevant to the type of work they are performing — pollution exclusions for contractors whose work involves grouting or drilling, professional services exclusions for contractors who provide design-assist services, earth movement exclusions for contractors doing ground improvement work — those exclusions apply to you as an additional insured just as they apply to the named insured.
What a Certificate of Insurance Actually Tells You
A certificate of insurance is a summary document. It confirms that a policy was in force on the date the certificate was issued and provides basic information about policy types, limits, and named insureds. What it does not tell you is nearly everything that matters for evaluating whether the coverage will actually protect you when a claim arises.
A certificate does not disclose whether the policy has a self-insured retention. It does not show the scope of the additional insured endorsement — specifically whether it covers completed operations or only ongoing operations. It does not show the exclusions on the policy. It does not confirm that the subcontractor has the financial capacity to satisfy their SIR obligations. And it does not guarantee that coverage will respond to any specific future claim.
Experienced risk managers treat the certificate as the beginning of a due diligence process, not the end of it. For high-value subcontracts and for specialty subcontractors whose work creates significant liability exposure — geotechnical contractors, structural steel erectors, mechanical contractors, and others whose work touches critical systems — reviewing the actual policy endorsements and understanding the SIR structure is worth the additional effort.
Practical Steps to Strengthen Your Subcontractor Insurance Requirements
Given everything above, here is what more rigorous subcontractor insurance due diligence looks like in practice from an insurance standpoint.
Require disclosure of SIR amounts in your subcontract. Add a provision requiring subcontractors to disclose any self-insured retention on their CGL policy above a specified threshold — say, twenty-five thousand dollars. Some GCs go further and require that any SIR above a certain amount be supported by a letter of credit or other financial assurance demonstrating the sub's capacity to fund it.
Specify completed operations additional insured coverage explicitly. Your subcontract should specify that additional insured status must include completed operations coverage and that the sub must maintain that coverage for a specified period after project completion. The certificate requirement should confirm this specifically rather than just referencing additional insured status generally.
Ask for the additional insured endorsement, not just the certificate. For significant subcontracts, request a copy of the actual additional insured endorsement — not just the certificate. This allows you to confirm the scope of coverage, identify any exclusions specific to additional insureds, and verify that completed operations is included.
Consider the sub's financial capacity alongside their policy limits. For specialty subcontractors performing high-risk work, understanding the financial size of the company relative to their SIR obligations is part of evaluating whether their insurance will actually work for you. A sub with a five hundred thousand dollar SIR and two million dollars in annual revenue is in a fundamentally different position than a sub with the same SIR and twenty million dollars in annual revenue.
Work with a broker who reviews subcontractor compliance, not just collects certificates. There is a meaningful difference between a broker who processes certificates and a broker who reviews them for structural issues. For projects with significant subcontractor liability exposure, the latter is worth having.
Frequently Asked Questions
Is a self-insured retention the same as a deductible?
No — and the difference matters for additional insureds. Under a deductible structure, the carrier defends the claim from day one and recoups the deductible from the insured later. Under an SIR, the carrier does not step in until the insured has funded the full retention amount. For an additional insured, this means a large SIR can delay or effectively eliminate the carrier's defense obligation until the subcontractor has paid out of pocket — which may never happen if the sub lacks the financial capacity to do so.
Can I require that subcontractors not have an SIR on their policy?
You can specify this in your subcontract insurance requirements — requiring that policies carry no SIR, or that any SIR not exceed a specified amount. Whether this is achievable depends on the subcontractor's market. Specialty contractors in higher-risk categories are sometimes only insurable in the excess and surplus market where SIR structures are more common. If a sub's policy has an SIR that exceeds your threshold, you can either require them to obtain alternative coverage, accept the risk with appropriate financial assurance requirements, or not use that sub.
My subcontract requires additional insured status including completed operations. Is that enough?
It is a strong requirement but not sufficient on its own. The subcontract requirement establishes what you are entitled to. Whether the policy actually delivers it depends on what the endorsement says, whether exclusions limit its scope, whether an SIR delays the carrier's response, and whether the subcontractor has the financial capacity to fulfill their obligations under the policy. The requirement and the reality are two different things — and the gap between them is what this article is about.
How do I know if a subcontractor's policy has a self-insured retention?
A certificate of insurance will not disclose an SIR. You need to either ask the subcontractor directly, require disclosure in the subcontract, or request a copy of the declarations page which will show the SIR if one exists. For significant subcontracts involving high-liability specialty work, asking for the declarations page rather than just the certificate is reasonable due diligence. Most professional subcontractors will comply with the request — reluctance to share this information is itself worth noting.
About the Author
Justin MacKenzie is a Commercial Account Executive at First West Insurance in Bozeman, Montana, specializing in insurance programs for contractors and construction businesses. He can be reached at justin@fstwest.com.
This article is for general informational purposes only and does not constitute professional insurance or legal advice. Coverage availability, terms, and conditions vary by insurer, jurisdiction, and individual risk characteristics. Consult a licensed insurance professional for guidance specific to your operations.
