How to read a commercial policy: declarations, forms and endorsements

Read a commercial policy in this order: the declarations page, the schedule of forms and endorsements, the insuring agreement of each coverage form, the exclusions and their exceptions, the definitions, the conditions, and then every endorsement, because an endorsement overrides whatever the base form says. Most claim surprises come from the last step being skipped.

How the policy is put together

A commercial package policy is a stack of documents, not one booklet. In the ISO system (see ISO forms and why most commercial policies look alike) it usually has these layers:

1. Common policy declarations. Who is insured, the policy period, the premium and the list of coverage parts.
2. Common policy conditions. Rules that apply to every coverage part. In the ISO form IL 00 17 these cover cancellation, changes, examination of books and records, inspections, premiums and transfer of rights. As the standard form is generally described, the insurer gives 10 days' notice to cancel for nonpayment and 30 days' for other reasons, though state amendatory endorsements often change those numbers.
3. One coverage part per line. Commercial property, general liability, commercial auto, crime, inland marine and so on. Each has its own declarations (limits, deductibles, locations), one or more coverage forms, and its own conditions.
4. Endorsements. Forms that change the base form: adding coverage, removing it, limiting it, or amending state rules.

A business owner's policy folds property and liability into one proprietary or ISO-based form. Non-standard and surplus lines policies often use the carrier's own wording, called manuscript or proprietary forms, which do not follow the ISO layout.

Step 1: the declarations page

Check every item. A wrong entry here can matter more than any exclusion.

• Named insured. The legal entity, spelled correctly. If you operate through an LLC, a parent and two subsidiaries, each needs to be a named insured. The first named insured receives notices and premium audits.
• Policy period and mailing address. The dates control which losses fall in the policy.
• Business description and classification. The description of operations, and any class codes, drive rating and sometimes coverage. A policy for a "restaurant" that you now run as a bar and a catering company is a recipe for a dispute.
• Locations and limits. Each building, each limit, and the valuation basis for property (replacement cost or actual cash value).
• Deductibles and retentions, including percentage deductibles for wind and hail.
• Additional interests. Mortgagees, loss payees and additional insured parties.
• Premium and audit basis. Whether the premium is flat or an estimate that will be adjusted at audit.
• Forms and endorsements schedule. The list of every form by number and edition date.

Compare the declarations to your quote and your application. If something changed, ask why.

Step 2: the forms schedule

The schedule lists every form in the policy by number and edition date, such as CG 00 01 04 13 for the general liability form. Confirm that each listed form is attached and that nothing attached is missing from the list. The edition date matters: a 2013 form and a 2026 form can read differently, and ISO revised its general liability multistate forms package for policies effective on or after October 1, 2026 in 48 jurisdictions (ISO circular LI-GL-2026-208, July 14, 2026). If a form is not on the schedule it may not be part of the policy, and if an endorsement is not attached, your broker's description of it is not a promise.

Step 3: insuring agreement, then exclusions

Every coverage form begins with a grant. Read it first, then the exclusions, then the exceptions to the exclusions ("This exclusion does not apply to..."). A coverage grant, an exclusion, and an exception are three different layers, and a claim is analyzed in that order.

A clause, line by line

The general liability insuring agreement in ISO form CG 00 01 (04 13 edition, excerpted here) opens by promising to pay the sums the insured becomes legally obligated to pay as damages because of covered bodily injury or property damage, and by giving the insurer the right and duty to defend suits seeking those damages. Taking the key phrases one at a time:

The same form states that its duty to defend ends when the applicable limit is used up in the payment of judgments or settlements, and the form tells you that other words in quotation marks have special meaning and are defined in Section V. That convention, quotation marks mean "look this up," holds across ISO forms.

Step 4: definitions and conditions

Definitions can quietly decide a claim. "Occurrence," "insured contract," "your work" and "suit" each have specific meanings. Conditions are the duties you owe the insurer, and failing them can hurt a claim. In CG 00 01 they include notice of an occurrence or offense "as soon as practicable," immediate forwarding of suit papers, a bar on voluntarily assuming obligations, other-insurance rules for sharing losses with other policies, and premium audit. Read tendering a claim to another party's insurer before you need it. The commercial property conditions form (CP 00 90) typically requires suit to be brought within two years of the loss, and a state amendatory endorsement may lengthen that.

Step 5: endorsements last, but they win

Endorsements are written to override the form. Their headings say "This endorsement changes the policy. Please read it carefully." When an endorsement conflicts with the base form, the endorsement controls. Typical ones to look for (the endorsements small businesses most often need has more):

• Additional insured: CG 20 10 (ongoing operations) or CG 20 37 (completed operations).
• Waiver of subrogation: CG 24 04.
• Limitations on coverage: CG 21 44 limits coverage to designated premises, projects or operations. CG 21 47 excludes employment-related practices.
• Data exclusions: CG 21 06 removes liability for access to or disclosure of confidential or personal information, which affects cyber exposures.
• Property: CP 12 32 (margin clause) caps a loss at a percentage of each location's value, and CP 10 36 limits coverage for roof surfacing, typically to actual cash value.

Form numbers change with new editions, so confirm the edition on your own schedule. Manuscript endorsements have no standard number.

Interpretation rules to know

Courts in most states treat an ambiguous policy provision against the insurer and read exclusions narrowly. That helps only after a dispute. Rules differ by state; some require the insured to prove a loss fits within the grant and the insurer to prove an exclusion applies, with the burden shifting back on exceptions. State amendatory endorsements add local rules on cancellation, nonrenewal and notice. For anything contested, a licensed broker or coverage attorney will read the actual forms, not a summary.

A ten-minute policy review

1. Check the named insured, address, period and description against your records.
2. Match limits, deductibles and valuation to the quote.
3. Confirm every form on the schedule is attached.
4. Read the insuring agreement and the exclusions of each coverage form for your top three risks.
5. Open every endorsement that has "exclusion," "limitation" or "designated" in its title.
6. Look for sublimits and percentage deductibles (commercial policy limits: per occurrence, aggregate and sublimits).
7. Note notice deadlines, proof-of-loss timing and suit limitation periods.
8. Compare to last year's policy form by form, using the edition dates.
9. Ask your broker in writing about anything you do not understand, and keep the answer.

the annual business insurance review: what to update expands this into a yearly process, and the What business insurance do I need? can show what you may be missing.

Key takeaways

• Read the declarations, the forms schedule, the grant, the exclusions and exceptions, the definitions, the conditions and then every endorsement.
• Endorsements override the base form, so a clean-looking coverage form can hide a limitation in an attached endorsement.
• Words in quotation marks are defined terms; look them up before concluding what a clause means.
• Compare each renewal to the last one form by form, paying attention to edition dates and new exclusions.