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📋 '''Prior act''' refers to a wrongful act, error, omission, or event that occurred before the inception date of a current [[Definition:Insurance policy | insurance policy]], particularly in [[Definition:Claims-made policy | claims-made]] coverage forms such as [[Definition:Professional liability insurance | professional liability]], [[Definition:Directors and officers insurance (D&O) | directors and officers (D&O)]], and [[Definition:Cyber insurance | cyber insurance]]. Because claims-made policies respond to claims first reported during the policy period regardless of when the underlying act took place, the treatment of prior acts determines whether a policyholder has coverage for problems rooted in past conduct that surface only after a new policy is bound.

⚙️ Coverage for prior acts hinges on the [[Definition:Retroactive date | retroactive date]] specified in the policy. Claims arising from acts that occurred on or after the retroactive date are eligible for coverage, provided the [[Definition:Insured | insured]] had no knowledge of the circumstances that could give rise to a claim at the time the policy was purchased. If the retroactive date matches the policy's inception date — sometimes called a "nose" exclusion — no prior acts are covered at all, and the policy only responds to acts committed during its own term. Conversely, a policy with a retroactive date set years in the past, or with full prior acts coverage (no retroactive date), extends protection much further back. Negotiating the retroactive date is a critical element of [[Definition:Policy placement | policy placement]], especially when an insured is switching [[Definition:Insurance carrier | carriers]]; a gap in the retroactive date can leave the insured exposed to claims arising from work performed during the uncovered period.

🛡️ The practical significance of prior act coverage becomes most apparent during transitions between insurers or when a professional enters a new insurance program. A law firm moving from one [[Definition:Errors and omissions insurance (E&O) | E&O]] insurer to another, for example, needs the incoming policy's retroactive date to reach back far enough to cover advice rendered under the outgoing program — otherwise, any malpractice claim arising from earlier work falls into an uninsured gap. Markets in the United States, the United Kingdom, and Australia all grapple with this issue, and in some professions, regulators require continuous retroactive coverage as a condition of practice. Understanding how prior acts interact with [[Definition:Extended reporting period (ERP) | extended reporting periods]], known-circumstance exclusions, and [[Definition:Continuity date | continuity dates]] is essential for [[Definition:Insurance broker | brokers]] and [[Definition:Risk manager | risk managers]] advising clients on claims-made programs.

'''Related concepts:'''
{{Div col|colwidth=20em}}
* [[Definition:Claims-made policy]]
* [[Definition:Retroactive date]]
* [[Definition:Extended reporting period (ERP)]]
* [[Definition:Professional liability insurance]]
* [[Definition:Continuity date]]
* [[Definition:Known circumstance exclusion]]
{{Div col end}}

Definition:Prior act - Revision history

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