A broad insurance policy can stop paying for two reasons the National Association of Insurance Commissioners’ glossary keeps separate. An aggregate is a maximum amount of coverage payable. An all-risk, or open-peril, policy covers risks the contract does not explicitly exclude, not every possible loss. Either boundary can leave a U.S. household paying part of a property or accident loss. These are general definitions, not a quote, a claim decision, or a Canadian rule.
The cap and the exclusion are different stops
The useful distinction is between how much a policy will pay and which events it will pay for. NAIC Research and Actuarial Department staff develop the glossary from insurance references. The page says the entries describe common or general use. Another company, regulator, or contract may define the same words differently, and a definition may not fit every context.
An aggregate, in that general use, is the maximum dollar amount or total amount of coverage payable for a single loss, for multiple losses, during a policy period, or on a single project. The glossary lists those four settings in one definition. It does not say which setting a homeowners, renters, or accident policy uses. That choice sits in the contract. Once the applicable maximum is reached, additional covered damage does not produce more payment under that coverage.
All-risk coverage works on a different axis. The glossary says an all-risk policy, also known as open peril, covers a broad range of losses and covers risks not explicitly excluded in the policy contract. A cause the contract names as excluded can produce no payment even when the aggregate still has unused room. Breadth describes the starting range. Exclusions and the aggregate describe where payment stops.
A maximum is not an appraisal or a repair bill
The aggregate caps coverage payable. It is not an appraisal, which the glossary defines as an estimate of value, and it is not a contractor’s invoice. An estimate can sit above or below the maximum. An adjuster investigates claims and recommends settlement options based on estimates of damage and on the policies held. The recommendation is tied to those policies, including their maximums and exclusions. A larger damage estimate does not, by itself, raise the aggregate.
The glossary also defines aggregate cost payments, a health-plan method that can require payment of a care entity’s operating costs and includes mutual guarantees of solvency. That entry is not the property or accident maximum discussed here.
Accident insurance is for unforeseen bodily injury. The glossary defines an accident as an unexpected event or circumstance without deliberate intent. Accident-only coverage, including accidental death and dismemberment, applies to death, dismemberment, disability, or hospital and medical care caused by an accident or specified kinds of accident. Accidental death and dismemberment pays a stated benefit. A stated benefit can be smaller than a hospital bill.
This ceiling is also different from actual cash value. The glossary describes actual cash value as a repayment value for property loss, in most cases replacement cost minus depreciation. Depreciation can reduce a payment before any aggregate is reached. The question in this article is the maximum and the excluded cause, not that depreciation formula.
One hypothetical shows both stops
The arithmetic below is hypothetical. It is not a NAIC example, not a real bill, and not a premium. Assume one coverage with a $40,000 aggregate for the policy period. Assume the first loss is a covered cause and the amount payable before the aggregate is $18,000. Assume a second event causes $27,000 of damage. No other contract term is applied, so only the aggregate and the exclusion are visible.
If the second event is also covered, the amounts total $45,000. The coverage pays the $40,000 aggregate, and the household is left with $5,000. After the first payment, $22,000 remains, because $40,000 minus $18,000 equals $22,000. On the second loss, $27,000 minus that remaining $22,000 equals $5,000.
If the contract explicitly excludes the cause of the second event, the unused $22,000 pays none of the $27,000. The household pays that $27,000 even though aggregate room remains and even if the policy is labeled all-risk. Changing the assumed dollars would change the remainder. It would not change the two mechanisms.
Allied lines are not an automatic package
Allied lines are coverages generally written with property insurance. The glossary’s examples include glass, tornado, windstorm and hail, sprinkler and water damage, explosion, riot and civil commotion, growing crops, flood, rain, and damage from aircraft and vehicle. The entry does not say that every property policy includes those coverages, and it does not say that an all-risk contract excludes them. Aircraft coverage is defined separately for the hull, contents, and specified liability. Separate entries are a reason to check a particular policy. They are not a claim decision.
An agent sells, services, or negotiates policies for a company or independently. That role does not turn a general definition into a household’s limit.
What a household can check next
For a U.S. household buying property or accident coverage, the practical task is to read the contract against these two definitions. See whether any aggregate applies to one loss, to multiple losses, to the policy period, or to a project. Read the exclusions instead of treating an open-peril description as unlimited. On an accident-only policy, compare a stated benefit with possible medical bills; this glossary does not supply those bills or any premium.
The evidence to watch next is the policy pages that state the dollar maximum and the exclusions, together with any later change in the NAIC’s aggregate or all-risk wording. An appraisal, a damage estimate, or a broad product name is not a substitute. If the contract differs from the glossary’s general use, the contract controls that policy. Checked on October 21, 2026, the glossary explains why broad coverage can stop paying. It does not calculate what any household will receive.