Overview
Liability insurance uses a "coverage trigger" to decide when an incident qualifies for payment under a policy. The two primary triggers are occurrence and claims-made, and the difference affects when a policy will respond to a claim.
Occurrence policies respond to injury or damage that happens during the policy period, regardless of when the claim is filed. Claims-made policies respond to claims that are first reported during the policy period, subject to any retroactive date or reporting extensions.
For additional context on triggers and how they affect business liability programs, see Understanding Coverage Triggers and Liability Insurance.
Key takeaways
- Occurrence triggers cover events that occur during the policy period regardless of when a claim is made.
- Claims-made triggers require the claim to be reported during the policy period (or within an extended reporting period) to be covered.
- Switching between trigger types can create gaps or overlaps unless you manage retroactive dates and purchase tail coverage.
How it works
With an occurrence policy, the relevant question is when the injury or damage happened. If it happened while the policy was active, the insurer evaluates the claim against that policy's terms even if the claim is filed years later.
With a claims-made policy, the key moment is when the claim is first reported to the insurer. Claims-made forms commonly include a retroactive date (which limits coverage for events before that date) and may require an extended reporting endorsement for claims reported after a policy ends.
For examples that compare triggers in different liability contexts, you may find the article Understanding Automobile Liability and Coverage Triggers helpful.
What it may cover (and what it may not)
Occurrence policies typically cover bodily injury and property damage claims that arise from events during the policy term, even if the claim surfaces later. They may still exclude certain types of losses listed in policy exclusions.
Claims-made policies cover claims first made during the policy term and can be limited by a retroactive date or by specific exclusions. They do not automatically cover claims that arise earlier unless the retroactive date precedes the event.
Neither trigger guarantees coverage for every loss; both are subject to policy limits, exclusions, and conditions such as timely notice and cooperation with the insurer.
Common mistakes to avoid
Failing to check the retroactive date when buying claims-made coverage is a frequent error. A retroactive date that postdates an incident can leave you without coverage for that prior act.
Another common mistake is switching from occurrence to claims-made (or vice versa) without arranging continuity. That can create gaps unless you secure tail coverage or ensure the retroactive date aligns with prior policies.
Assuming that pricing differences alone justify a switch is risky; cheaper premiums on a claims-made form may cost far more later if reporting windows are missed.
Questions to ask an agent
What trigger does this policy use, and is that consistent with my prior coverage?
Does the claims-made policy have a retroactive date, and does it match or predate my previous retroactive date?
What options exist for extended reporting periods or "tail" coverage if I switch carriers or retire a program?
Next steps
Review your current policy declarations and any prior policies to confirm the trigger type and retroactive date. If you manage exposures across multiple years, consider how a change in trigger will affect continuity and long-term risk.
If you want guidance tailored to your situation, consult resources for business liability or seek expert advice; for coverage that fits small business needs see Understanding Liability Insurance for Entrepreneurs.
If you prefer to discuss options with a licensed professional, talk to an agent who can review retroactive dates, tail options, and the practical impact of changing triggers.
Frequently Asked Questions
How does a retroactive date affect a claims-made policy?
The retroactive date limits coverage to incidents that occurred on or after that date; events before it are generally excluded even if the claim is made during the policy period.
What is "tail" or extended reporting period coverage?
Tail coverage extends the time to report claims after a claims-made policy ends, allowing claims arising from covered acts during the policy period to be reported later.
Can I switch from occurrence to claims-made without losing protection?
You can, but you must coordinate retroactive dates and consider purchasing tail coverage to avoid gaps between policies.
Does occurrence coverage always cost more than claims-made?
Not always; pricing depends on market conditions and insured risk, so compare terms and long-term exposures rather than price alone.