Occurrence vs. Claims-Made Triggers
Key Takeaways
- An occurrence policy responds when the injury or damage happens during the policy period, regardless of when the claim is made.
- A claims-made policy responds only when the claim is first made during the policy period, subject to a retroactive date.
- The retroactive date is the earliest injury date that can be covered; injuries before it are excluded even if claimed during the term.
- Tail coverage (extended reporting period) lets an insured leaving claims-made coverage report later claims for prior covered acts.
When Does a Liability Policy Respond?
Liability policies use a coverage trigger to decide which policy year answers a claim. The two triggers, occurrence and claims-made, behave very differently for long-tail exposures where injury appears years after the act, and the exam tests the distinction relentlessly.
| Trigger | Policy responds when | Best for |
|---|---|---|
| Occurrence | The injury or damage happens during the policy period, regardless of when the claim is made | Most general liability |
| Claims-made | The claim is first made during the policy period (subject to a retroactive date) | Professional liability, D&O, some products/pollution |
Occurrence Trigger
An occurrence policy responds if the bodily injury or property damage takes place during the policy period, no matter how long afterward the claim is filed. A 2026 occurrence policy covers an injury that happens in 2026 even if the lawsuit arrives in 2031. This makes occurrence coverage simple for the insured but exposes insurers to long-tail claims, so insurers prefer claims-made for exposures with delayed manifestation.
Claims-Made Trigger
A claims-made policy responds only if the claim is first made against the insured during the policy period (and after any retroactive date). It uses two devices the exam tests: the retroactive date, the earliest date an injury can have occurred and still be covered, and tail coverage (an extended reporting period), which lets an insured report claims after the policy ends for incidents that occurred during the policy term. Without tail coverage, an insured who switches to occurrence coverage or retires can face a gap for old acts not yet claimed.
Retroactive Date and Tail Coverage
The retroactive date is usually set at the inception of the first claims-made policy and carried forward through renewals; an injury occurring before the retroactive date is not covered even if claimed during the policy period. An extended reporting period (ERP, tail) can be basic (a built-in short window, often 60 days for late reporting plus a longer mini-tail) or supplemental (a purchased, often unlimited-duration tail). The exam tests scenarios where an insured cancels claims-made coverage and needs a tail to cover claims arising from prior acts.
Choosing and Comparing Triggers
Use the trigger to answer the coverage question. If the policy is occurrence, ask only whether the injury happened during the policy period. If the policy is claims-made, ask whether the claim was first made during the policy period and whether the injury occurred on or after the retroactive date; if the insured is leaving claims-made coverage, ask whether a tail is in place. A typical exam item gives an injury date, a claim date, a policy period, and a retroactive date and asks whether coverage applies.
Working the trigger mechanically, occurrence keys on injury date, claims-made keys on claim date plus retroactive date plus tail, produces the right answer and explains why professional liability, directors-and-officers, and some pollution and products coverages are written claims-made while most general liability is written on an occurrence basis.
An occurrence-based liability policy is in force during 2026. An injury happens in 2026, but the lawsuit is not filed until 2031. Does the 2026 policy respond?
A professional cancels a claims-made policy and wants protection for claims arising from prior covered work. What is needed?
Applying the Trigger to Dated Facts
Trigger questions supply an injury date, a claim date, a policy period, and (for claims-made) a retroactive date, then ask whether coverage applies. For an occurrence policy, ask only whether the injury occurred during the policy period; if so, that policy responds no matter when the claim arrives, even years later. For a claims-made policy, ask whether the claim was first made during the policy period and whether the injury occurred on or after the retroactive date; both must be true.
The retroactive date is the earliest injury date that can be covered, so an injury before it is excluded even if claimed during the term. Tail coverage (an extended reporting period) lets an insured leaving claims-made coverage report later claims for prior covered acts; without it, post-cancellation claims may be uncovered.
| Trigger | Decisive date(s) |
|---|---|
| Occurrence | Injury date within policy period |
| Claims-made | Claim date in period AND injury ≥ retroactive date |
| Tail (ERP) | Allows late reporting after the term |
A worked case: a claims-made policy with a January 1, 2024 retroactive date faces an injury that occurred June 1, 2023 but is first claimed in 2026 while the policy is in force. The claim date is within the period, but the injury predates the retroactive date, so there is no coverage. Recognizing why each line uses its trigger, occurrence for most general liability, claims-made for professional, D&O, and some pollution and products coverages, lets you predict coverage when the same facts would produce opposite outcomes under different triggers.
Apply the trigger mechanically: for an occurrence policy ask only whether the injury occurred during the policy period (it responds even if the claim arrives years later); for a claims-made policy ask whether the claim was first made during the period and whether the injury occurred on or after the retroactive date (both must be true). An injury before the retroactive date is excluded even if claimed during the term, and an insured leaving claims-made coverage needs tail (extended reporting period) coverage to report later claims for prior covered acts.
Most general liability is occurrence; professional, D&O, and some pollution and products coverages are claims-made.