Occurrence in liability insurance

A customer falls in a store in March, reports an injury weeks later, and files a lawsuit in November. If the business had an occurrence-based liability policy in force in March, that policy may be the one to examine even though the formal claim came later. That is the basic idea: occurrence coverage generally follows the time of covered injury or damage, not the date the claim is first presented. The exact policy language and facts still determine whether coverage is available.

For the Texas Property and Casualty exam, keep three questions separate: what event or condition the policy calls an occurrence, when covered bodily injury or property damage happened, and whether the remaining terms provide coverage. A policy label by itself does not settle the claim. The insured, type of harm, causal relationship, exclusions, notice duties, and limits all matter. The Texas Department of Insurance describes occurrence policies as covering claims arising from injury or damage occurring while the policy is in force, regardless of when the claim is first made.

What occurrence-based coverage means

An occurrence form is a way to identify which policy period may respond to a liability claim. Under a typical commercial general liability (CGL) form, the coverage grant addresses bodily injury or property damage caused by an occurrence and requires that the bodily injury or property damage occur during the policy period. The policy’s definitions and endorsements matter. Many standard forms define an occurrence as an accident, including continuous or repeated exposure to substantially the same general harmful conditions, but that wording is contractual language rather than a universal definition that applies to every policy.

This definition connects an event or exposure with harm. An accidental event may be sudden, such as a visitor tripping on a loose mat, or harm may develop through repeated exposure, such as recurring contact with a harmful substance. Whether a particular event is an accident under a particular policy can depend on what the insured intended, what happened, and how the form defines occurrence. Do not assume that every negligent act automatically is an occurrence, or that a deliberate act can never result in covered accidental injury. Apply the actual wording to the allegations and facts.

Occurrence is not a synonym for claim, lawsuit, accident report, or policy limit. A claim is a demand for relief; a lawsuit is one way a demand may proceed. The occurrence is the policy-defined event or exposure connected with the injury or damage. A policy limit determines the maximum available amount under specified terms, and an aggregate limit may cap payments for a defined group of claims. The question of how many occurrences there are can affect limits, but that is a separate issue from which policy period is triggered.

The timing question: when did the injury or damage happen?

A useful starting point is to make a timeline. Mark the alleged accident or exposure, when bodily injury or physical property damage actually began, when it was noticed, when the claim was made, and the start and end dates of each potentially relevant policy. Those dates can differ. Under an occurrence form, the date the injured person discovers the harm is not automatically the date the harm happened, and the date of the negligent act is not automatically the date property damage occurred.

This distinction matters for a condition that develops gradually. A contractor may install a defective component in one year, physical damage may begin later, and the owner may discover the damage after that. The occurrence policy question is not answered simply by pointing to the installation date or discovery date. The policy’s definition of property damage and its timing wording must be examined alongside evidence about when physical injury to tangible property actually took place.

Texas provides a specific example in Don’s Building Supply, Inc. v. OneBeacon Insurance Co. The Texas Supreme Court considered occurrence-based CGL policies that defined property damage as physical injury to tangible property and required that the property damage occur during the policy period. It adopted an actual-injury rule for those policies: coverage was triggered when actual physical damage occurred, not merely when a defective product was supplied or when damage was later discovered. The opinion addressed the particular policy language and certified questions before the court; it should not be converted into a blanket answer for every form of liability insurance.

The court expressly left open whether the same rule applies to bodily-injury claims. That limit is important. For an exam question, use any timing rule stated in the stem or policy. For a real claim, identify the precise bodily-injury or property-damage definition, the policy period, relevant endorsements, and controlling law. Do not cite Don’s Building Supply as having settled all bodily-injury trigger questions.

A simple occurrence-versus-claims-made comparison

At a high level, an occurrence form generally focuses on when the covered injury or damage takes place. A claims-made form generally focuses on when the claim is first made, subject to the policy’s reporting requirements and other terms. TDI describes the distinction this way in its commercial general liability guidance. The two forms can therefore point to different policy years for the same underlying conduct. This brief comparison is only a framework: detailed rules about retroactive dates, extended reporting periods, and notice belong to the policy wording and are outside this article’s focus.

Do not read this as saying that an occurrence policy pays every claim made after it expires. The underlying injury or damage must satisfy the coverage grant, the claimant’s allegations or proven facts must connect to the insured as required, and the insured must meet applicable conditions. Nor does the comparison mean a claims-made policy covers every claim reported while the policy is active. Each form sets its own requirements.

Bodily injury and property damage can raise different timing facts

Bodily injury and property damage are separate coverage categories. A single event can cause both—for example, a customer may fall because of a broken stair, suffer an injury, and damage a phone. But the two harms may begin at different times and have different evidence. A bodily injury might be felt immediately, diagnosed later, or alleged to have developed through repeated exposure. Physical property damage might be hidden behind a wall and found only during renovation. The policy language and facts should be analyzed for each category rather than assuming the same date applies to both.

Texas’s Don’s Building Supply holding concerns property damage under the wording before the court. The opinion states that the court expressed no view on whether the same trigger rule applies to bodily-injury claims. Therefore, a careful exam answer should avoid broad statements like “Texas always uses the actual-injury rule for both bodily injury and property damage.” If a question supplies a specific rule for bodily injury, follow it. If it supplies policy wording, read that wording closely. If neither is supplied, state what facts matter rather than inventing a universal rule.

Worked scenarios

A customer falls during the policy year

A shop has a CGL occurrence policy from January 1 through December 31. On October 4, a customer slips on a spill, reports shoulder pain, and later makes a claim in February after the policy expires. The accident and reported injury occurred during the policy period. The occurrence policy is a logical policy to examine even though the claim arrived later. Coverage is not automatic: the shop must be an insured, the injury must fit the policy’s coverage grant, applicable exclusions and conditions must be considered, and the claim facts must support the required connection to the occurrence.

A defect is installed in one year, damage begins in another

A supplier sells a defective fitting in 2024. The fitting is installed in a building that year. Evidence later shows that water first physically damaged the surrounding materials in 2025, while a CGL policy was in force; the building owner discovers the damage in 2026. Under the property-damage wording analyzed in Don’s Building Supply, the installation date alone would not determine the trigger. The actual physical-damage date is central. The 2025 policy would need to be evaluated, but the case does not guarantee coverage: the insured, causal allegations, exclusions, other policy language, and evidence still matter.

A condition is discovered after a policy ends

A commercial tenant notices a stained ceiling in April, after a policy expired on March 31. The stain may reflect a pipe leak that started in February, a leak that began in April, or an older condition. The discovery date is a clue, not a complete timeline. An investigator may need maintenance records, photographs, repair findings, and witness accounts to determine when the physical damage began. If actual damage occurred during the earlier policy period, an occurrence policy from that period may be relevant; if it began later, another policy year may matter. Policy language and facts decide.

An act takes place during the term, but the harm date is unclear

A contractor performs work in November, while a policy is active. The customer claims the work caused damage but does not say when the damage began. It is not enough to pick November just because that is when the work occurred. The examiner should notice the missing timing fact and look for allegations or evidence about when injury or damage occurred. The same discipline applies in practice: identify what is known, what is alleged, and what must be investigated before assigning a policy period.

One event, several policy periods

A business stores a chemical product that releases small amounts over time. Several customers report symptoms after repeated exposure across multiple months. The policy may define occurrence to include continuous or repeated exposure to substantially the same general harmful conditions, but the wording, injury allegations, and applicable law determine how the event and timing are analyzed. Do not assume that each exposure automatically creates a separate occurrence, or that all injuries necessarily fall into one year. The question here is to locate the potential timing issue, not to resolve allocation across insurers.

A practical method for exam questions

1. Identify the policy type and read the coverage grant. Look for the terms occurrence, bodily injury, property damage, and policy period.
2. Write down the date of the alleged accident or exposure and the date each category of harm occurred. Keep discovery and claim dates separate.
3. Ask what the policy means by occurrence. Use the definition in the question or form; do not assume all policies use identical wording.
4. For property damage under the Texas Supreme Court’s Don’s Building Supply holding, distinguish actual physical damage from the earlier act that may have caused it and the later date of discovery.
5. For bodily injury, avoid extending Don’s property-damage holding beyond its stated scope. Apply the supplied wording and facts.
6. Compare the relevant harm date with the beginning and end of each policy period that may apply.
7. Check other requirements after identifying a potential trigger: insured status, causation, exclusions, conditions, limits, and any required notice.
8. If important facts are missing, state what fact would resolve the timing issue instead of treating an assumption as established.

Occurrence does not mean coverage is automatic

A potential occurrence only gets the analysis started. A CGL policy is designed to address specified liability exposures, including covered bodily injury or property damage, but the policy contains exclusions and conditions. For example, a complaint might allege physical injury to property but the policy may contain an exclusion relevant to the insured’s work, product, or particular hazard. Whether an exclusion applies depends on its text, exceptions, and facts. Do not jump from “there was an accident” to “the insurer must pay.”

The type of liability policy also matters. A general liability form, professional liability form, auto policy, and umbrella policy may define covered events and timing differently. Even within one category, endorsements can modify the base form. TDI’s review checklist recognizes policy provisions that amend the occurrence definition or limit coverage for continuous or repeated trigger losses. For an exam, the supplied policy wording is usually the strongest guide. In a real claim, the complete contract and applicable law need to be reviewed.

Also distinguish the duty to defend from the duty to indemnify. The defense question often asks whether the allegations, construed under the governing rules, potentially fall within coverage. Indemnity asks whether the established facts and liability are covered. Those are related but different inquiries, and an occurrence label alone does not answer either one. On an introductory exam question, focus on the requested task and do not mix pleading analysis with final payment analysis unless the stem asks you to.

Common mistakes to avoid

• Using the date a lawsuit was filed as the occurrence date under an occurrence form.
• Assuming the date of the insured’s act is always the date property damage occurred.
• Assuming hidden damage first occurred on the date it was discovered.
• Applying Don’s Building Supply to all bodily-injury trigger disputes even though the court expressly left that question open.
• Treating an occurrence definition as identical across all liability policy forms and endorsements.
• Assuming an occurrence during a policy period guarantees coverage without checking the type of injury or damage, insured status, exclusions, and conditions.
• Confusing occurrence timing with the number of occurrences or the available limits.
• Giving detailed claims-made answers about retroactive dates and extended reporting periods when the question only asks which trigger applies.
• Assuming the existence of a Texas CGL rule removes the need to read the actual contract.

The rule to remember

For an occurrence-based liability policy, start with when covered injury or damage happened, then compare that timing with the policy period and read the policy’s definition and remaining terms. A later claim may still relate to an earlier occurrence policy. Under Don’s Building Supply, actual physical property damage—not simply the earlier allegedly faulty work or later discovery—triggered the property-damage coverage under the policy wording before the Texas Supreme Court. The court did not decide whether that same timing rule governs bodily injury. Keeping those points separate is the safest way to solve exam questions and describe the Texas context accurately.

Build confidence with occurrence, liability, and policy-period questions in the Texas Property and Casualty exam course.