8.3 Occurrence vs. Claims-Made Triggers

The Coverage Trigger Question

A coverage trigger answers: "Which policy responds to a loss?" The two triggers tested on the exam are occurrence and claims-made. The distinction matters most for long-tail exposures — latent injuries (asbestos, pollution) and professional liability — where years separate the negligent act from the lawsuit.

The Claims-Made Mechanics

A claims-made policy covers a claim ONLY if BOTH conditions are met:

1. The negligent act occurred on or after the retroactive date, AND
2. The claim is first made during the policy period (or extended reporting period).

Retroactive Date and ERP

• Retroactive date — the earliest date a covered act can occur. Acts before it are NEVER covered. Advancing (moving forward) the retro date creates a coverage gap.
• Extended Reporting Period (ERP / "tail") — lets the insured report, AFTER the policy ends, claims arising from acts during the policy term.
  • Basic (mini) tail — automatic, short (often 60 days to report; 5 years for claims from known incidents).
  • Supplemental tail — purchased, longer or unlimited reporting window.

Trap: A claim made during the policy period but arising from an act BEFORE the retroactive date is NOT covered — both tests must pass.

Why the Trigger Matters: A Long-Tail Example

An architect designs a building in 2019. A defect causes injury, and the lawsuit is filed in 2026 — seven years later.

• Occurrence form: the 2019 policy (when the design/exposure occurred) responds, even though it expired years ago. The insured must locate the old policy and its limits.
• Claims-made form: the 2026 policy responds (when the claim is made), PROVIDED the 2019 act is after that policy's retroactive date.

Stair-Stepping Limits

Claims-made insurers often raise limits over a multi-year period. Because the CURRENT policy responds, the limit in force when the claim is made — not when the act occurred — applies. This is why moving carriers and managing the retro date carefully is critical.

Exam point: Occurrence = WHEN IT HAPPENED. Claims-made = WHEN IT WAS REPORTED. The retroactive date and the tail belong ONLY to claims-made forms.

Two Ways a Liability Policy Is Triggered

Liability forms differ in what event activates coverage. The distinction governs which policy year responds and is one of the most tested commercial-casualty concepts.

The Occurrence Trigger and Long-Tail Losses

An occurrence policy responds if the bodily injury or property damage takes place during the term, even if the lawsuit arrives years later. This creates long-tail exposure (asbestos, pollution, latent injury) and the problem of identifying which policy year's limits apply when damage is continuous. The advantage to the insured is that coverage cannot be lost simply because the policy later lapses.

The Claims-Made Trigger, Retroactive Dates, and Tails

A claims-made form responds only if the claim is first made during the policy period and the injury occurred on or after the retroactive date. Two devices manage the gaps: a retroactive date caps how far back covered injuries may have occurred, and an Extended Reporting Period (ERP), or "tail," lets the insured report claims after the policy ends.

Basic vs. Supplemental Tail

The "laser" trap: never let a retroactive date advance on renewal or move from claims-made back to occurrence without a tail, or a gap opens. Expect a fact pattern asking which year's policy pays when injury and claim fall in different terms.

The Four Coverage Triggers in Long-Tail Litigation

For continuous or progressive injury (asbestos, pollution), courts have adopted four competing trigger-of-coverage theories the exam may reference: exposure (coverage triggered when the claimant was first exposed), manifestation (when the injury became known), continuous/triple trigger (every policy from exposure through manifestation responds), and injury-in-fact (whenever actual injury can be shown).

These theories matter only for occurrence forms, where the date of injury - not the date of claim - controls. A claims-made form sidesteps the trigger debate entirely because coverage attaches when the claim is reported, which is precisely why insurers shifted long-tail professional and pollution risks to claims-made forms.

Why the Trigger Choice Drives Pricing and Tails

The practical upshot for a producer: an occurrence form is simpler for the insured (no tail needed, coverage locked at the date of injury) but harder for the insurer to reserve for long-tail risk, so it costs more in volatile lines. A claims-made form is cheaper early but creates tail and retro-date management obligations the producer must monitor at every renewal and at any change of carrier - failing to secure a tail or preserve the retroactive date is a classic producer errors-and-omissions exposure.