Read the insurance exhibit before you bid, not after you win. The exhibit is where additional insured endorsements, primary and non-contributory wording, waiver of subrogation, and completed operations requirements live. Any one of them can add endorsement premiums you never priced into the bid — commonly in the range of $100s to $1,000s per policy change (broker-reported, not a quote). Reading it after you win means absorbing those costs or renegotiating from a weak position after you've already committed. The one case to skip the pre-bid read: a renewal of an identical job for a GC whose exhibit hasn't changed in the last 12 months.
Last updated: October 2026. Pricing verified October 2026 — changes often; verify before committing.
Methodology: This guide is written for subcontractors reviewing GC-issued bid packets. Endorsement and premium figures are directional ranges reported by independent brokers and reflect typical U.S. commercial general liability (CGL) markets as of October 2026; they are not quotes. Form references (CG 20 10, CG 20 37, etc.) are standard ISO forms used nationally. Verify every figure and form edition with your own broker before you commit.
TL;DR
- Reading the exhibit before you bid converts insurance from an unplanned cost into a known line item. Endorsement premiums for exhibit-driven changes typically range from the low hundreds to a few thousand dollars per policy change (broker-reported, not a quote).
- Three exhibit terms change insurance cost: additional insured (CG 20 10 + CG 20 37), primary and non-contributory, and waiver of subrogation. Each relies on standard national ISO forms.
- The pre-bid read can be skipped only for a repeat job for the same GC with an unchanged exhibit inside the last 12 months.
- Standard PDF search (Ctrl+F for "additional insured," "primary," "subrogation," "completed operations") lets you scan the exhibit in about two minutes without parsing legalese. A broker can confirm what each hit actually costs.
Don't act yet: This guide assumes you are bidding as a subcontractor. General contractors and design professionals (architects, engineers) carry different risk profiles and different exhibit obligations. Nothing here is legal or insurance advice — confirm your specific situation with a licensed broker and, where contract language is involved, construction counsel before you rely on it.
What is a bid packet insurance exhibit?
The insurance exhibit is the section of a GC's bid packet or subcontract that lists every insurance requirement you must meet to be paid: limits, additional insured status, specific endorsement forms, certificate of insurance (COI) wording, and the certificate holder's name. It is usually titled "Exhibit C," "Insurance Requirements," or "Attachment 4," and it is the single most expensive page in the packet to misread.
Definition — insurance exhibit: the attachment to a subcontract or bid invitation that spells out the coverage, endorsements, and COI language a sub must carry before a general contractor will sign, pay, or let you onsite.
Is it worth reading the insurance exhibit before I bid or after I win?
Before. The exhibit decides what your insurance actually costs on this job, and you can only price that into a competitive bid if you read it first. Here's the mechanic: GCs almost never ask only for a COI. They ask for endorsements that modify your policy, and endorsements are not free.
When you read the exhibit after winning, you've already quoted a number. At that point your broker may tell you the CG 20 37 completed operations endorsement carries an added premium, the waiver of subrogation carries another, and your carrier may not issue primary and non-contributory wording at all on your current form. You either absorb it or walk, and walking after award burns the relationship.
The three terms that change insurance cost
These rely on standard national ISO forms. The forms themselves read the same whether the job is in California, Texas, or Florida — though how courts interpret them, and what endorsements your carrier will actually issue, can vary.
Additional insured (CG 20 10 ongoing operations + CG 20 37 completed operations). The CG 20 10 adds the GC as an additional insured for liability arising out of your ongoing work; the CG 20 37 extends that status to completed operations — claims that surface after you've left the site. Most GC exhibits demand both, because the CG 20 10 alone leaves a gap once the project wraps. Insurance Services Office (ISO) maintains and files these forms nationally. If your exhibit names only CG 20 10, do not assume completed operations is covered — confirm the CG 20 37 is attached, and price its premium into the bid. (See ISO's standard CGL endorsement library and the IRMI glossary on additional insured status, below.)
Primary and non-contributory. This wording requires your policy to pay first and bars your insurer from demanding that the GC's insurer contribute. Without it, your carrier may try to share the loss with the GC's policy — which is what the GC's exhibit is written to prevent. Some carriers add this via endorsement (e.g., CG 20 01) at additional premium; some restrict it. Verify your form can deliver it before you bid, not after.
Waiver of subrogation. This stops your insurer from recovering from the GC after it pays a claim, even where the GC was partly at fault. Carriers typically charge a premium to add a waiver (e.g., CG 24 04 for general liability). A blanket waiver demand buried in "Exhibit C" is a cost line, not a formality.
Read all three together. An exhibit that stacks CG 20 10 + CG 20 37 + primary/non-contributory + a blanket waiver can move your insurance cost on a single job by several line items — which is the reason to read it before the number goes out the door.
How to read the exhibit in two minutes
- Open the PDF and run a standard search (Ctrl+F, available at no cost in common PDF readers) for: "additional insured," "primary," "non-contributory," "subrogation," "completed operations," and "ongoing operations."
- For each hit, note the specific form number or edition date requested.
- Email the exhibit — not a summary — to your broker and ask for the added premium on each item.
- Add that total to your bid as a visible line, or decide it's a no-bid.
Frequently asked questions
Should I read the insurance exhibit before or after I bid? Before. The exhibit sets what your insurance costs on the job, and you can only price it competitively if you read it before submitting. Reading after you win means absorbing uncounted endorsement premiums or renegotiating from a weak position.
What is CG 20 37? CG 20 37 is a standard ISO additional insured endorsement that extends additional insured status to completed operations — liability claims arising from your work after the project is finished. It is commonly paired with CG 20 10, which covers ongoing operations.
When is it safe to skip the pre-bid read? Only for a renewal of an identical scope for the same GC whose insurance exhibit has not changed within the last 12 months. Any new GC, new scope, or re-issued exhibit means read it again.
Dated authority sources
- Insurance Services Office (ISO), Verisk — standard CGL additional insured endorsement forms (CG 20 10, CG 20 37) and editions, as maintained 2025–2026. iso.com (accessed October 2026).
- International Risk Management Institute (IRMI), "Additional Insured Status" and "Primary and Noncontributory," IRMI Glossary of Insurance & Risk Management Terms, irmi.com (updated 2025, accessed October 2026).
- National Association of Insurance Commissioners (NAIC), consumer guidance on commercial liability coverage and certificates of insurance, naic.org (accessed October 2026).