9.3 Causes of Loss Forms (Basic, Broad, Special)

Key Takeaways

  • Three causes-of-loss forms exist: Basic (CP 10 10), Broad (CP 10 20), and Special (CP 10 30, open-peril).
  • Theft is excluded by the Basic form but covered by both the Broad and Special forms - a classic exam distinction.
  • The Special form covers all direct physical loss except what is excluded, shifting the burden of proof to the insurer.
  • Flood, earth movement, war, nuclear hazard, ordinance or law, and government action are excluded by all three forms unless separately endorsed.
  • After 60 consecutive days of vacancy certain perils are suspended and other covered losses are reduced 15 percent.
Last updated: June 2026

Why a Separate Form

A commercial property policy needs two forms: a coverage form (the BPP, CP 00 10) that says what is insured, and a causes-of-loss form that says which perils are covered. The causes-of-loss choice is the largest driver of premium and of how a claim is adjusted.

Basic Form (CP 10 10) - 11 Named Perils

The Basic form is named-peril: the insured must prove the loss came from a listed peril.

#PerilExam note
1FireHostile (out-of-place) fire only
2LightningDirect strike or resulting fire
3ExplosionExcludes steam-boiler explosion
4Windstorm or HailInterior loss only if wind first makes an opening
5SmokeSudden and accidental
6Aircraft or VehiclesImpact damage
7Riot or Civil CommotionIncludes looting during a riot
8VandalismExcluded if vacant 60-plus days
9Sprinkler LeakageAutomatic fire-protection systems
10Sinkhole CollapseSudden sinking into a void
11Volcanic ActionBlast, ash, lava; not earthquake

Note: theft is NOT a Basic-form peril.

Broad Form (CP 10 20) - Adds Coverage

The Broad form includes all 11 Basic perils and adds:

  • Falling objects (exterior must be penetrated first for interior loss)
  • Weight of snow, ice, or sleet
  • Water damage - sudden, accidental discharge from plumbing, HVAC, or appliances (NOT flood)
  • Breakage of building glass (limited)
  • Collapse as an additional coverage from specified causes

Theft becomes covered at the Broad level.

Special Form (CP 10 30) - Open Peril

The Special form flips the logic: it covers all risks of direct physical loss EXCEPT those excluded. Because coverage is presumed, the burden of proof shifts to the insurer to show an exclusion applies. This is the broadest and most expensive form and is the basis for Businessowners building coverage (Section 9.5).

Exclusions Common to All Three Forms

ExclusionReason
Ordinance or LawCode-upgrade cost; needs CP 04 05
Earth MovementEarthquake, landslide, mine subsidence
Government ActionSeizure or destruction by authority
Nuclear HazardReaction, radiation, contamination
Utility ServicesOff-premises power or water failure
War and Military ActionDeclared or undeclared
WaterFlood, surface water, sewer backup, mudflow

Flood and earthquake are never covered by any of the three forms. Flood needs a separate policy (often the National Flood Insurance Program, NFIP); earthquake needs the CP 10 40 endorsement.

Additional Special-Form Exclusions

The Special form also excludes wear and tear; rust, corrosion, decay; mechanical breakdown; settling, cracking, shrinking; insect, bird, or rodent damage; fungus and wet or dry rot; faulty design or workmanship; and voluntary parting with property induced by trick or fraud.

Side-by-Side Comparison

Peril / featureBasicBroadSpecial
Coverage approachNamedNamedOpen peril
Fire / lightningYesYesYes
TheftNoYesYes
Water (pipes/HVAC)NoYesYes
Weight of snow/iceNoYesYes
FloodNoNoNo
EarthquakeNoNoNo
Premium levelLowestMediumHighest

Worked Scenario

A pipe bursts overnight and water ruins a retailer's inventory. The Broad and Special forms cover it as accidental discharge of water; the Basic form lists no water damage and pays nothing. If instead a river overflows into the store, no form pays - that is flood, requiring a separate flood policy.

Anti-Concurrent-Causation

The exclusions begin with anti-concurrent-causation language: excluded perils are excluded "regardless of any other cause or event that contributes concurrently or in any sequence." If flood (excluded) and wind (covered) combine, the portion from flood is still excluded. Adjusters use this to split hurricane losses between covered wind and excluded storm surge.

Collapse and Special Sublimits

Under the Broad and Special forms, collapse is an additional coverage triggered only by specified causes such as hidden decay or hidden insect damage; mere settling or cracking is not collapse. Even where the Special form covers theft, certain property carries special limits: typically $2,500 for furs, $2,500 for jewelry and watches, and $250 for theft of stamps, tickets, and letters of credit.

Choosing the Right Form

The form decision balances premium against breadth, and the exam often frames it as a scenario.

SituationBest fitReason
Tight-budget warehouse, low theft riskBasicLowest premium, fire and lightning core
Retailer wanting theft, water, and snowBroadAdds theft, accidental water, weight of snow
High-value or hard-to-foresee exposuresSpecialOpen-peril; insurer must prove an exclusion

Because the Special form covers anything not excluded, it picks up oddball losses a named-peril form would never list - a forklift puncturing a wall, paint accidentally spilled across stock, or a contractor dropping a tool through a skylight. That breadth is exactly why it commands the highest premium and why the study focus shifts from inclusions to exclusions.

How Adjusters Apply the Forms

Under Basic and Broad, the insured must first prove a listed peril caused the loss before the claim proceeds; under Special, the insured shows direct physical loss and the insurer must point to an exclusion. This reversal changes claim outcomes in borderline cases - an unexplained but sudden loss is more likely paid under Special and more likely denied under a named-peril form. Producers therefore steer clients with unpredictable exposures toward Special and budget-driven clients toward Basic.

Common Traps

  • Theft is the single most-missed item: Basic excludes it, Broad and Special cover it.
  • Water damage is not flood - internal pipe leaks can be covered; rising surface water never is.
  • A building vacant more than 60 consecutive days loses vandalism, water-damage, theft, glass, and sprinkler-leakage coverage, and other losses are cut 15 percent.
  • Open-peril does not mean unlimited - jewelry and fur theft carry $2,500 special sublimits.
Relative Coverage Scope by Causes of Loss Form (Perils Covered)
Test Your Knowledge

Which causes-of-loss form(s) would cover theft of business personal property?

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B
C
D
Test Your Knowledge

A river overflows and floods a store's stockroom. Under which causes-of-loss form is this loss covered?

A
B
C
D