Resource · Published October 28, 2026
Why Underwriters Reject ACORD 126: 7 Critical Audit Gaps
Short answer
Underwriters return ACORD 126 general liability submissions mainly when classifications don’t match the described operations, exposure figures conflict across documents, subcontractor questions are incomplete, or additional insured obligations and loss history are missing. Each gap stops rating until the broker responds.
1. Do the GL classifications match the described operations?
ACORD 126 lists classifications, class codes and premium bases for each location. Underwriters compare these against the description of operations on ACORD 125, the website and any supplemental application. When a contractor is coded as a low-hazard class but describes higher-hazard work (for example roofing or new residential construction), the underwriter cannot rate the risk until the conflict is explained.
How to fix it: Confirm every class code against the insured's actual revenue mix and record a percentage split by operation.
2. Does the exposure basis reconcile with the rest of the packet?
Most GL classes are rated on payroll, gross sales, area or units. If gross sales on ACORD 126 differ from ACORD 125, financial statements or a supplement, the underwriter must decide which figure to trust. Understated exposures also create a premium audit problem after binding, which carriers want to avoid at the front end.
How to fix it: Use one source of truth for the last 12 months and the projected next 12 months, and note which period each figure covers.
3. Are subcontractor questions fully answered?
The contractor questions on ACORD 126 ask whether subcontractors are used, the cost of subcontracted work, and whether certificates of insurance are collected. A "Yes" to subcontractors with a blank cost field, or no answer on certificates and minimum limits required from subs, is one of the most frequent reasons a contractor GL file is returned.
How to fix it: Provide annual subcontractor cost, the type of work subbed out, and the insured's written requirements for sub certificates and additional insured status.
4. Are additional insured and contractual requirements disclosed?
Many contractors sign agreements requiring additional insured status for owners and general contractors. ISO publishes separate endorsements for ongoing operations (CG 20 10) and completed operations (CG 20 37), and some contracts require primary and non-contributory wording or waivers of subrogation. If these obligations are not disclosed, the underwriter may quote terms that do not satisfy the insured's contracts.
How to fix it: Collect a sample of the insured's key contracts and list the endorsements they require before going to market.
5. Is the products-completed operations exposure described?
ACORD 126 asks about products, completed operations and work performed after the policy period. Underwriters look closely at residential work, structural work and products sold under the insured's own label. Leaving these questions blank or answering "No" when the operations clearly include completed work is treated as a disclosure gap.
How to fix it: Describe the type of completed work, typical project size, and any warranty or post-completion service the insured provides.
6. Are all general information questions answered with explanations?
Both ACORD 125 and ACORD 126 contain yes/no questions on topics such as prior cancellations, hazardous materials, exposure to the public and safety programs. Many require a written explanation when answered "Yes". A single unanswered question can prevent an underwriter from quoting.
How to fix it: Review every yes/no question before submission and attach explanations wherever the form asks for them.
7. Do the loss runs support the application?
Underwriters expect currently valued loss runs, commonly covering the prior three to five years, from each prior carrier. Loss runs that are stale, missing a policy term, or show claims that the application says do not exist will stop the review.
How to fix it: Request loss runs valued within the last 90 days and reconcile every listed claim against the loss history section of the application.
What should you check before sending ACORD 126 to a carrier?
| Check | Pass condition |
|---|---|
| Named insured and entity type | Identical on ACORD 125, ACORD 126 and supplements |
| Class codes vs. operations | Each code supported by a revenue % split |
| Exposure basis | Same payroll / sales figure across all documents, period stated |
| Subcontractors | Cost, scope and certificate requirements answered |
| Additional insured obligations | Required endorsements (e.g. CG 20 10, CG 20 37) listed |
| Products-completed operations | Type of completed work described |
| General information questions | No blanks; explanations attached |
| Loss runs | Current valuation, every prior term, reconciled to the application |
For a worked example with a side-by-side comparison, see how to audit ACORD 125 and 126 submissions, or use the full commercial lines coverage checklist.
PacketSlip runs these checks automatically with its preflight checklist engine and cross-document reconciliation, citing the page behind every finding.
ACORD 126 FAQ
What is ACORD 126?
ACORD 126 is the Commercial General Liability Section of a commercial insurance application. It captures GL limits, classifications, exposure bases, hazards and coverage-specific questions, and is normally submitted together with ACORD 125.
What is the most common reason an ACORD 126 is returned?
In practice the most frequent issues are incomplete subcontractor answers and classifications or exposures that do not match the rest of the packet. Both prevent the underwriter from rating the risk without going back to the broker.
What is the difference between CG 20 10 and CG 20 37?
Both are ISO additional insured endorsements. CG 20 10 generally addresses the additional insured's exposure during the named insured's ongoing operations, while CG 20 37 addresses completed operations. Contracts often require both.
How many years of loss runs do underwriters need?
It varies by carrier and class, but three to five years of currently valued loss runs is a common requirement for commercial general liability submissions.
Sources and further reading
- ACORD — Forms and standards
- IRMI — Additional insured coverage glossary
- NAIC — Commercial general liability insurance overview
- Verisk ISO — Commercial general liability program
This guide is general educational information, not legal or coverage advice. Form requirements vary by carrier and state; always confirm with the target market.