The three causes-of-loss forms, and the burden-of-proof flip that is the real difference. The single most consequential choice in a commercial property policy is which of three levels of covered causes it uses, and two regulators describe the ladder in the same terms.
The Texas Department of Insurance sets it out this way. "Basic form policies provide the least coverage. They usually cover damage caused by fire, windstorms, hail, lightning, explosions, smoke, vandalism, sprinkler leakage, aircraft and vehicle collisions, riots and civil commotion, sinkholes, and volcanoes." Broad form policies "usually cover the causes of loss included in the basic form, as well as damage from leaking appliances, structural collapses, falling objects, and weight of ice, sleet, or snow." And "special form policies provide the most coverage. These policies usually cover damage from all causes of loss, except those specifically listed in the policy." NAIC gives the same structure independently, describing the special form as including "basic and broad form coverage plus all other direct physical losses except conditions specifically excluded and listed in the policy."
The practical difference is not just a longer list. Basic and broad are named-peril forms: the policy responds if the cause of loss appears on its list, and the business has to establish that it does. The special form is an open-peril form: everything physical is covered unless the policy excludes it, and it is the insurer that has to point to the exclusion. For an unusual or hard-to-diagnose loss, that difference in who carries the argument can matter more than the difference in the lists.
What the special form excludes is therefore where the reading has to happen. According to the Department, "most policies exclude damages from floods, earth movement, war, nuclear disaster, wear and tear, and insects or vermin." Wear and tear is the one businesses trip on most often, because a slow failure is often the thing that eventually causes visible damage.
Replacement cost versus actual cash value, applied to a business. The Department states the choice and its consequence together: "Commercial property policies provide either replacement cost coverage, actual cash value coverage, or a combination of both." Replacement cost coverage "pays to repair or replace your property at current costs. This means the policy will pay enough to rebuild your building and replace your property with new items, even if the cost is more than what you originally paid." Actual cash value coverage "pays replacement cost minus depreciation", and the Department is blunt about the result: "If you have actual cash value coverage, the policy might not pay enough to fully rebuild your business." NAIC describes the same pair, defining actual cash value as reimbursing "the assessed value lost, damaged or stolen goods after depreciation".
The choice bites hardest on the assets a business has held longest and would have to replace immediately. Depreciated computers, a fifteen-year-old refrigeration unit and worn shelving are precisely the items whose actual cash value is a small fraction of what a replacement costs, and they are also the items a business cannot operate without. A policy written on a combination basis, replacement cost on the building and actual cash value on contents, is common and is worth identifying, because the contents are usually where the gap is.
The coinsurance clause, and why under-insuring costs more than the shortfall. A commercial property policy typically requires the business to carry insurance equal to a stated percentage of the property's value. NAIC describes the mechanism: it is "a clause contained in most property insurance policies to encourage policy holders to carry a reasonable amount of insurance," and "if the insured fails to maintain the amount specified in the clause (usually at least 80%), the insured shares a higher proportion of the loss."
The consequence for a business is proportional rather than absolute, and this is the part that surprises people: a business insured for half of what the clause requires does not merely hit its limit sooner, it has every partial loss reduced in proportion. A $40,000 fire on a building insured at half the required amount is not a $40,000 claim; it is a fraction of one, before the deductible. Since a total loss is capped by the policy limit anyway, the clause's bite falls almost entirely on the partial losses that make up most claims. NAIC's practical advice follows from that: "have your business property value assessed before you buy, and periodically after you purchase insurance", because the value the clause is measured against moves with construction costs.
What the policy does not include, and where each of those lives instead. A business reading a commercial property policy for the first time is usually surprised by the size of this list, and the Department enumerates it:
- Flood. "Most commercial property policies don't cover damage from flooding," and a separate policy is needed. Note the timing trap: "There's a 30-day waiting period after you buy a flood policy before the coverage goes into effect", so it cannot be arranged when weather is forecast.
- Coastal wind and hail, in the states that carve it out. The Department tells a business on the Texas coast or in Harris County on Galveston Bay that its policy "probably doesn't cover wind and hail damage", and directs it to the state windstorm association, which "won't sell you a policy if there's a hurricane in the Gulf of Mexico." That is Texas's arrangement. Which coastal states exclude wind from the standard policy, and what residual market stands behind it, is a question about the individual state.
- Crime. Separate coverage exists for "robbery and safe burglary", "forgery and alteration", "employee theft", "cyber crime", and "money and securities, which insures money, securities, and other property against losses that happen on or off your business site."
- Inland marine, which despite the name "covers property kept on land, not on water", and reaches accounts receivable, computers, contractor equipment, fine art, property in transit, valuable papers, and property held for others.
- Lost income. Business interruption coverage "pays for the income you lose if your business can't operate normally", and extra expense coverage "pays additional costs to return your business to normal after it's damaged." These are additions rather than components.
- Code upgrades. Ordinance or law coverage "pays extra construction or repair costs to meet current building codes", which is the gap that turns a covered rebuild into a partly uninsured one for an older building.
- Equipment breakdown. Boiler and machinery coverage reaches "boilers, air conditioning units, compressors, steam cookers, electric water heaters, and similar machinery."