Coverage trigger is the timing test that determines when a claim is within a liability policy.
In simple terms, it answers whether the policy responds based on the date of the incident or the date the claim is made.
Primary trigger structures
The two common liability structures are:
- Occurrence trigger: coverage is tied to the date the wrongful act or accident happened.
- Claims-made trigger: coverage is tied to when the claim is first made against the insured during the policy period.
Underwriting role
Underwriters decide which trigger best fits the risk. Claims-made products often include a retroactive date and are priced with reporting behavior in mind. Occurrence forms usually shift uncertainty into long-tail reserve management because claims can surface long after the incident.
Claims logic
Claims handlers must confirm the trigger before reserves and defenses are finalized:
- Confirm policy type and effective dates.
- Confirm date of exposure, injury, or damage.
- Confirm reporting date and whether reporting is mandatory under the policy.
- Confirm whether any exclusion for late notice applies.
Practical example
An employee injures someone in 2023. The suit is filed in 2026.
- Under an occurrence form, coverage is tested against the 2023 policy period.
- Under a claims-made form, coverage depends on whether the claim was reported within the claims-made period.
Regulatory context
Regulatory filings and disclosures are critical for these products. In many markets, policies using claims-made triggers must plainly explain retroactive dates and notice requirements so insureds do not discover gaps when coverage is switched.