Two Ways to Trigger Coverage
Every liability insurance policy has a "trigger" — the event that activates coverage. There are two fundamental trigger types, and understanding them is essential for every agent who writes commercial business.
How Occurrence Policies Work
An occurrence policy covers any loss that occurs during the policy period, regardless of when the claim is filed.
Example: You have a CGL policy in force from January 1, 2024 to December 31, 2024. On March 15, 2024, a customer slips and falls in your store. The customer does not file a lawsuit until August 2026 — more than a year after the policy expired. Your 2024 occurrence policy covers this claim because the event occurred during the policy period.
Key advantage: Once the policy period ends, you are covered for any events that happened during that period — forever. There is no "tail" to buy, no gap to worry about. The coverage is permanent for events during the policy term.
Common occurrence lines: General liability (CGL), commercial auto, commercial property, workers compensation, homeowners, personal auto.
How Claims-Made Policies Work
A claims-made policy covers claims that are reported during the policy period, regardless of when the event occurred (subject to the retroactive date).
Example: You have a professional liability (claims-made) policy from January 1, 2024 to December 31, 2024, with a retroactive date of January 1, 2020. A client sues you on June 15, 2024, for an error you made in March 2022. This claim is covered because: (a) the claim was made during the policy period, and (b) the error occurred after the retroactive date.
But if the same lawsuit is filed on February 1, 2025 — after the policy expired — it is NOT covered (unless you purchased a new policy or tail coverage). This is the critical difference and the primary risk of claims-made coverage.
Common claims-made lines: Professional liability (E&O), directors & officers (D&O), employment practices liability (EPLI), cyber liability, medical malpractice.
The Retroactive Date: Why It Matters
The retroactive date creates a "lookback window" on a claims-made policy. Only events occurring on or after the retroactive date are covered. If your retroactive date is 2020 and an event occurred in 2019, there is no coverage — even if the claim is filed during the current policy period.
When you switch claims-made carriers, the new carrier may try to set a new retroactive date (typically the inception date of their policy). This creates a gap — events between the old retroactive date and the new one are no longer covered. Smart agents negotiate to maintain the original retroactive date when switching carriers.
The Tail Coverage Problem
When a claims-made policy ends — whether through cancellation, non-renewal, or the insured switching to an occurrence form — a coverage gap appears. Any claims filed after the policy ends are not covered, even for events that occurred during the policy period.
The solution is tail coverage (extended reporting period or ERP). Tail coverage extends the claims reporting period after the policy ends — typically for 1-5 years or sometimes indefinitely. It is essential in three situations:
- Retirement: An agent retiring with a claims-made E&O policy needs tail coverage to protect against claims filed after they stop practicing
- Switching from claims-made to occurrence: The new occurrence policy only covers future events — the tail covers claims from the claims-made period
- Policy non-renewal: If the carrier non-renews and the insured cannot find replacement coverage immediately
Tail coverage is not free — it typically costs 75-200% of the last annual premium. But going without it can be catastrophic.
Agent Best Practices
- Know the trigger form: For every policy you place, know whether it is occurrence or claims-made. This affects how you advise the client at renewal and if they ever change carriers.
- Protect retroactive dates: When switching claims-made carriers, always negotiate to maintain the original retroactive date. Losing retroactive date coverage creates gaps.
- Discuss tail coverage proactively: When a client with claims-made coverage is considering retirement, a carrier switch, or a move to occurrence, the tail coverage conversation should happen before the change — not after.
- Document your advice: The trigger form conversation is exactly the kind of advice that generates E&O claims when it goes wrong. Document what you recommended and what the client decided.
- Review annually: At every renewal, confirm the retroactive date has not changed and that the trigger form still matches the client's needs.