What a Certificate of Insurance Does Not Prove
A certificate of insurance is a summary prepared by the subcontractor's agent. Standard certificate forms typically say they are issued for information only, confer no rights on the holder and do not amend or extend the policy. A certificate that checks the additional insured box tells you the agent believes an endorsement exists; it does not show which endorsement, whether it reaches completed operations or whether it is limited to written contracts signed before the work began.
Certificates also go stale. A policy can be canceled, nonrenewed or reissued with new exclusions after the certificate is filed. Ask for copies of the endorsements themselves and for the policy's exclusions page, and refresh the file at each renewal during the job and for the completed operations period the subcontract requires.
For the policy side of the chain, see how project GL and excess layers fit together.
Additional Insured Endorsements for Ongoing and Completed Operations
Additional insured status gives the developer or GC direct rights under the subcontractor's policy. Insurers commonly use separate endorsements for ongoing operations and completed operations, and many blanket endorsements extend additional insured status only while the work is in progress. A subcontract that asks only for additional insured status, without naming completed operations and a duration, may leave the upstream party without rights once the work is turned over.
Read each endorsement for three things: who qualifies (a named entity, or any party the named insured agreed in writing to add), what triggers coverage (often liability caused in whole or in part by the subcontractor's acts or omissions) and how long completed operations status lasts. Some endorsements also cap the additional insured's limits at the lesser of the policy limits or what the contract requires. If the subcontract does not state a limit or duration, the endorsement may supply its own.
To size the completed operations duration in the subcontract, start with how long completed operations exposure lasts.
Waiver of Subrogation and Primary and Noncontributory Wording
A waiver of subrogation stops the subcontractor's insurer from suing the developer or GC to recover what it paid. Primary and noncontributory wording asks the subcontractor's policy to pay first for the additional insured, without seeking contribution from the upstream party's own policy. Both normally require an endorsement on the subcontractor's policy; the subcontract alone may not bind the insurer.
Ask for the waiver on each line the subcontract names, which may include general liability, auto, workers' compensation and umbrella or excess. Then confirm the subcontractor's umbrella or excess policy also treats the developer or GC as an insured on a primary and noncontributory basis, because some excess forms do not follow the underlying additional insured terms.
Indemnity Limits in California, Texas, Arizona and Nevada
In California, Civil Code §2782 voids indemnity for the promisee's sole negligence or willful misconduct. For residential construction contracts after January 1, 2009, §2782(d) makes subcontractor indemnity for construction defect claims unenforceable to the extent they arise from the builder's or GC's negligence or fall outside the subcontractor's written scope, and §2782(e) says the subcontractor owes no defense or indemnity until it receives a written tender with the claimant's information. For many commercial contracts on or after January 1, 2013, §2782.05 limits indemnity for the GC's active negligence; it expressly does not apply to wrap-ups or to requirements to buy insurance, including additional insured endorsements for ongoing and completed operations.
In Texas, Insurance Code §151.102 voids indemnity to the extent it covers the indemnitee's own negligence, with an exception in §151.103 for claims by the indemnitor's employees. Section 151.104 voids additional insured requirements to the same extent, and §151.151 bars waiving the chapter. Section 151.105 excludes single-family, townhouse and duplex work and municipal public works. In Arizona, A.R.S. §32-1159 voids indemnity for the promisee's sole negligence in private construction contracts. In Nevada, NRS 40.693 voids certain indemnity provisions in residential construction contracts and makes an additional insured pursue that coverage before suing a subcontractor for defense costs.
The practical result is that a single national subcontract form rarely fits all four states. Counsel should tailor the indemnity and insurance exhibits to each state and project type.
How these limits shape a GC's overall program is covered on our page for general contractor project insurance.
When Your Own Policy Depends on Subcontractor Paperwork
Many GC and developer liability policies include a subcontractor condition. It may require written subcontracts with hold harmless language, additional insured status for ongoing and completed operations and minimum limits before a subcontractor starts work. If a subcontractor's file is incomplete when a claim arises from its work, the carrier may deny or limit coverage for that claim.
That turns document collection into a coverage requirement, not just a contract formality. Build a start-of-work gate: no mobilization until the signed subcontract, the endorsements and current certificates are in the file and match what both the subcontract and your own policy condition require.
Bond paperwork belongs in the same start-of-work file; see subcontractor performance and payment bond requirements.
Record Retention for the Life of the Claim Window
A defect claim can arrive years after the subcontractor has left the job or gone out of business. When it does, the GC's ability to tender to the subcontractor and its insurer depends on producing the subcontract, the endorsements in force during the work and proof of the completed operations term. Keep those records at least as long as the repose period for the project's state and work type, which runs as long as 10 years after substantial completion for latent deficiencies in California.
Store the file by project and by subcontractor, include each renewal's endorsements and keep proof of the substantial completion date. A clean file is often what makes a tender succeed.
Collecting these items before contracts are signed is part of our project insurance document checklist.
Before You Ask for a Quote
What to Gather
- Signed subcontract with the insurance exhibit and indemnity clause
- Additional insured endorsements for ongoing and completed operations
- Waiver of subrogation and primary and noncontributory endorsements
- Current certificates for each line, refreshed at every renewal
- Subcontractor umbrella or excess policy's insured and follow-form terms
- Documented substantial completion date for each scope
What to Ask the Insurer or Surety
- Does the additional insured endorsement extend to completed operations, and for how long?
- Is additional insured status limited to parties named in a written contract signed before work?
- Does the subcontractor's excess policy recognize the GC as an insured on a primary basis?
- What subcontractor documentation does our own GL policy condition require?
- Does the indemnity clause fit the state's anti-indemnity statute for this project type?
Quick Answer
Collect the endorsements, not just the certificate: additional insured for ongoing and completed operations, waiver of subrogation and primary and noncontributory wording. Then fit indemnity to state law and keep the file through the repose period.
Common Mistake
Accepting a certificate with the additional insured box checked. The underlying endorsement may stop at the end of ongoing work, leaving no rights when a defect claim arrives after turnover.
Broker Perspective
A broker reads the subcontractor's actual endorsements against the subcontract and against the GC's own policy condition before work starts.
Coverage Impact
Missing or narrow subcontractor endorsements can shift defense costs to the GC's own policy, and an unmet policy condition may limit that policy too.
Questions Buyers Ask
Is a certificate of insurance enough to prove I'm an additional insured?
Usually not. A certificate is an information document that typically confers no rights and does not change the policy. Ask for the endorsement itself and check whether it names you or uses blanket written-contract wording, whether it reaches completed operations and whether it caps the limits or the duration.
What should a subcontract say about completed operations additional insured status?
It should require additional insured status for both ongoing and completed operations, state how long completed operations status must be maintained and name the endorsement wording or an equivalent. Without a stated duration, the endorsement or policy terms may control. Have counsel tailor the clause to the state and project type.
Can a Texas GC require a sub to name it as additional insured for the GC's own negligence?
Generally no. Texas Insurance Code §151.104 voids additional insured requirements to the extent they would provide coverage for what §151.102 bars in indemnity, which includes the indemnitee's own negligence. There is an exception for claims by the subcontractor's employees, and Chapter 151 excludes single-family, townhouse and duplex work.
How long should I keep subcontractor insurance records after a project closes?
At least as long as claims can be brought, which depends on the state and work type. In California, latent deficiency claims can be filed up to 10 years after substantial completion, so many GCs hold the file at least that long, with proof of the completion date and every endorsement in force during the work.
Official Sources
- NRS 40.645, 40.646, 40.6472, 40.649 and 40.693 (constructional defect actions), Nevada Legislature. Pre-suit notice, 30-day forwarding, 90-day response, insurer duties, indemnity limits and wrap-up disclosures for residential contracts after February 24, 2015 Verified 2026-10-25.
- Cal. Civil Code §2782 (construction indemnity limits), California Legislative Information. Sole negligence rule; residential subcontractor defect indemnity limits after January 1, 2009 (§2782(d)); written tender requirement (§2782(e)). Verified 2026-10-23.
- Cal. Civil Code §2782.05 (subcontractor indemnity, commercial contracts), California Legislative Information. Active-negligence limit for contracts on or after January 1, 2013; exclusions for wrap-ups and insurance requirements including ongoing and completed operations additional insured endorsements. Verified 2026-10-23.
- Tex. Ins. Code ch. 151 (indemnity and additional insured limits), Texas Legislature (Texas Constitution and Statutes). §151.102, §151.103, §151.104, §151.105 and §151.151 as summarized on the page. Verified 2026-10-23.
- A.R.S. §32-1159 (indemnity agreements in construction contracts), Arizona State Legislature. Sole negligence indemnity void in private construction contracts. Verified 2026-10-23.
- Cal. Code Civ. Proc. §337.15 (latent deficiency repose), California Legislative Information. Ten-year horizon used for record retention guidance. Verified 2026-10-23.
Reviewed by the Principal, Gleason Insurance Brokers, LLCUpdated
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