Commercial insurance policy guides

A commercial insurance policy is decided as much by what it excludes as by the limit on the declarations. These source-cited guides cover limits and aggregates, sublimits, claims-made vs occurrence, coinsurance, replacement cost vs ACV, exclusions, additional insureds, duties after loss, and coverage gaps.

Last reviewed: May 26, 2026 by the BizLeaseCheck Editorial Team. General information, not insurance advice.

Insurance guideHow to Read a Business Insurance Policy

A policy is not just the declarations page. What you are actually covered for lives in the insuring agreement, the exclusions, and the endorsements.

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Insurance guidePer-Occurrence vs Aggregate Limits Explained

Two numbers control how much your liability policy pays: the most for one claim, and the most for the whole policy period. Both can run out.

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Insurance guideInsurance Sublimits Explained

A sublimit is a cap inside a cap. Your policy limit may be $1M, but a sublimit can quietly cap a key peril at a fraction of that.

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Insurance guideClaims-Made vs Occurrence Policies Explained

Whether a policy is claims-made or occurrence decides which policy responds to a claim — and a gap when you switch can leave you uncovered.

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Insurance guideCoinsurance and the Underinsurance Penalty

A coinsurance clause quietly penalizes you for under-insuring — even on a partial loss you fully expected to be covered.

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Insurance guideReplacement Cost vs Actual Cash Value

How your property is valued at a loss — replacement cost or actual cash value — can be the difference between being made whole and a depreciated payout.

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Insurance guideCommon Commercial Insurance Policy Exclusions

Coverage is decided as much by what is excluded as by what is granted. These are the exclusions that most often leave businesses exposed.

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Insurance guideAdditional Insured and Waiver of Subrogation

Leases and contracts often require you to add the other party as an additional insured and waive subrogation. The contract promise is only as good as the endorsement.

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Insurance guideDuties After Loss and Proof-of-Loss Deadlines

A covered claim can still be denied if you miss a post-loss duty. Notice and proof-of-loss deadlines are easy to blow and hard to undo.

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Insurance guideDefense-Within-Limits ("Eroding") Policies Explained

On an eroding policy, every dollar your insurer spends defending you is a dollar less to settle the claim. The limit can run out before the loss is paid.

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Insurance guideInsurance Cancellation and Nonrenewal Explained

A policy can be cancelled midterm or simply not renewed. The notice you get — and the reasons allowed — are limited, and largely set by state law.

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Insurance guideCommercial Flood Insurance and Coverage Gaps

Flood is almost always excluded from a standard property policy. For many businesses it is the single biggest uncovered risk.

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Frequently asked questions

What should I check first in a business insurance policy?

Start with the declarations and insuring agreement, then the limits and sublimits, then the exclusions and endorsements, and finish with the conditions — including your duties after a loss. Coverage is decided as much by the exclusions as by the limits.

Why do sublimits and exclusions matter so much?

A high policy limit can hide a low sublimit (for cyber, water, or flood) or an exclusion that removes the coverage you most need. Those are the most common causes of surprise underinsurance.

Is this insurance advice?

No. These guides are general, educational information to help you read your own policy. They are not insurance advice or a coverage opinion. Confirm coverage and adequacy with a licensed insurance agent or broker, and read the actual policy.

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Upload the policy and endorsements. The report flags limits, sublimits, exclusions, claims-made and coinsurance traps, valuation, and the coverage gaps you still carry, each tied to a quote from your document.