A peril is the actual cause of a loss—the event that does the damage. Fire, theft, windstorm, hail, and collision are all perils. When you read an insurance policy, the perils are what determine whether a loss is covered, because policies promise to pay for damage caused by certain perils and not others.

Why it matters

Coverage lives or dies on the peril. If your policy covers the peril that caused your loss, you're paid; if it doesn't, you're not. Understanding perils helps you read a policy correctly and explain to a client exactly what is—and isn't—protected.

Named peril vs. open peril

This is the central distinction:

• Named-peril (specified-peril) policies cover only the perils specifically listed. If the cause isn't on the list, there's no coverage. The burden is on the insured to show the loss came from a listed peril.
• Open-peril (special / "all-risk") policies cover every cause of loss except those specifically excluded. Coverage is broader, and the burden shifts to the insurer to prove an exclusion applies.

A simple example

Under the ISO HO-3, the house is insured on an open-peril basis but personal property only for 16 named perils (fire or lightning, windstorm or hail, explosion, riot, aircraft, vehicles, smoke, vandalism, theft, falling objects, weight of ice, snow or sleet, accidental discharge of water or steam, sudden tearing apart of heating or water systems, freezing, artificially generated electrical current, volcanic eruption). If a river floods the home, flood is excluded under both, so it needs NFIP or private flood insurance.

The ISO dwelling DP-1 covers only fire, lightning and internal explosion unless the Extended Coverage perils (windstorm, hail, explosion, riot, aircraft, vehicles, smoke, volcanic eruption) and vandalism or malicious mischief are added.

Don't confuse it with…

A peril is the cause of loss; a hazard is something that increases the chance of a peril happening. Fire is a peril; storing oily rags in a corner is a hazard that makes the fire peril more likely.

On the exam

Nail the named-peril vs. open-peril distinction and who bears the burden of proof. Keep the peril-vs-hazard difference straight, and remember that exclusions are how open-peril policies carve out what they won't cover.