The reference shelf
The fine print, defined
Twenty terms that decide claims, each explained by what it actually does and linked to the documented story where it did it. Policies are contracts; these are the words the contract fights about.
Actual cash value (ACV)
What your stuff was worth the moment before it was destroyed: replacement cost minus depreciation. A nine-year-old roof insured at actual cash value pays out as a nine-year-old roof, not a new one. The gap between ACV and the contractor’s bill is one of the most common surprises in a property claim.
Replacement cost value (RCV)
What it costs to buy or rebuild the thing new today, with no deduction for age. Policies written at replacement cost usually pay the actual cash value first and hold the rest until you prove the repair happened. That held-back slice has its own name: recoverable depreciation.
Recoverable depreciation
The part of a replacement-cost claim the insurer keeps until receipts prove the repair was done. First check now, second check after the roofer is paid. Miss the paperwork deadline and the second check can quietly become nobody’s money but the insurer’s.
Anti-concurrent causation clause
Twenty-one words that decided thousands of Katrina homes: when a covered peril (wind) and an excluded peril (flood) hit together, in any order, the exclusion can swallow the whole loss. Upheld by the Fifth Circuit in Leonard v. Nationwide in 2007, and still printed in coastal homeowners policies.
Named perils vs. open perils
A named-perils policy covers only the disasters on its list. An open-perils policy (the standard HO-3 dwelling form) covers everything except what it specifically excludes. That one word of architecture is why a bear through the garage door is covered: bears are not on any exclusion list.
Exclusion
The list of things a policy will not pay for, and where most denial stories begin. Flood, earth movement, neglect, vermin, war. Exclusions are read literally, so the fight is almost always over one word: whether a squirrel is vermin, whether surge is flood, whether a collapse was hidden decay.
Sublimit
A cap inside a cap. Your policy may cover $300,000 of dwelling but only $5,000 of water backup, $1,500 of jewelry, $2,500 of business property. The big number on the declarations page means little until you know which small numbers live inside it.
Deductible (flat vs. percentage)
What you pay before the policy pays anything. Flat deductibles are a dollar figure. Percentage deductibles, standard for hurricane and hail in many states, are a share of the dwelling limit: 2 percent of a $300,000 house is $6,000 out of pocket, per storm, before the first insurance dollar moves.
Hurricane deductible
A percentage deductible that switches on when a named storm hits. Common along the Gulf and Atlantic coasts at 1 to 5 percent of the dwelling limit. It exists because Hurricane Andrew bankrupted eleven insurers in 1992, and it means the first five figures of a hurricane claim are often yours.
NFIP 30-day waiting period
A new federal flood policy takes effect at 12:01 a.m. on the 30th day after purchase (44 CFR 61.11). There is no exception for an approaching storm. For Hurricane Harvey, the cutoff passed on July 26, 2017, four weeks before the storm had a name.
Flood exclusion
Standard home and renters policies exclude flood entirely, including hurricane storm surge. Flood coverage exists only as a separate policy, federal (NFIP) or private. After Harvey, insured households averaged $118,000 per claim; the uninsured averaged $4,400 in federal grants.
Comprehensive coverage (auto)
The optional “other than collision” half of an auto policy: theft, hail, fire, falling objects, floods, sinkholes, and animals. Hit a deer and it is a comprehensive claim. Swerve around the deer and hit a tree, and it becomes a collision claim with a different deductible.
Agreed value policy
Insurer and owner set the payout number in writing before anything happens, standard for collector cars that no depreciation table can price. When a sinkhole swallowed the 1 millionth Corvette, the ordinary market had no answer for what it was worth. An agreed-value policy would have.
Contestability period
The first two years of a life insurance policy, during which the insurer can reopen the application and investigate the claim before paying. It exists because people have faked their deaths for money, sometimes by canoe.
Insurable interest
You can only insure a life or a thing whose loss would actually cost you something. The rule exists because an 18th-century London coffee house let strangers bet on when sailors would die, and the law eventually decided that was a market in murder incentives.
FAIR Plan
A state’s insurer of last resort for property, born from the 1968 federal FAIR (Fair Access to Insurance Requirements) framework. California’s grew to 684,388 policies by March 2026 as private carriers retreated, with a 29.1 percent rate increase effective October 15, 2026. Coverage is thinner and pricier than the market it replaces.
Non-renewal vs. cancellation
Cancellation ends a policy mid-term and is tightly restricted. Non-renewal is the quieter exit: the insurer simply declines to continue at the end of the term. States set the warning clock: 75 days in California, 120 in Florida, 60 in Texas. That window is your entire shopping runway.
NAIC complaint index
The regulator’s ratio of a carrier’s complaints to its market size. An index of 1.00 means complaints match the carrier’s share of premiums; 2.00 means double the expected complaints; 0.50 means half. It is the closest thing to a public report card on claims behavior.
Endorsement (rider)
A written amendment that changes what the standard form covers: adding water backup, scheduling jewelry, buying back an exclusion. Most of the difference between two neighbors’ payouts after the same disaster is not the carrier. It is which endorsements were on the page.
Umbrella policy
Liability coverage stacked above your home and auto limits, sold in million-dollar layers for a few hundred dollars a year. It exists for the day a dog bite, a car crash, or a backyard accident produces a verdict with more digits than your regular policy has.