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📋 '''Tail coverage''' is a provision or endorsement — most commonly associated with [[Definition:Claims-made policy | claims-made policies]] — that extends the period during which an insured can report [[Definition:Insurance claim | claims]] for incidents that occurred while the policy was in force, even after the policy itself has expired or been cancelled. In the insurance industry, this concept is sometimes called an "extended reporting period" (ERP), and it plays a critical role in [[Definition:Professional liability insurance | professional liability]], [[Definition:Directors and officers insurance (D&O) | directors and officers]], [[Definition:Medical malpractice insurance | medical malpractice]], and [[Definition:Errors and omissions insurance (E&O) | errors and omissions]] coverage, where the gap between an act and the resulting claim can stretch months or years.

🔄 When a [[Definition:Claims-made policy | claims-made policy]] terminates — whether because the insured switches [[Definition:Insurance carrier | carriers]], retires, or merges with another entity — any claim reported after the expiration date would ordinarily go uninsured, even if the underlying incident fell squarely within the policy period. Tail coverage closes this gap by granting an additional window, often one to six years or sometimes unlimited, for the [[Definition:Policyholder | policyholder]] to submit late-reported claims. The insured typically purchases tail coverage as a one-time [[Definition:Premium | premium]], frequently calculated as a percentage of the expiring policy's annual premium. Some policies include an automatic mini-tail — a short complimentary reporting extension of 30 to 60 days — while longer extensions require explicit purchase.

💡 Failing to secure adequate tail coverage can leave professionals and organizations exposed to significant [[Definition:Liability | liability]] for past acts with no insurance backstop. Consider a physician who retires without purchasing a tail: if a patient files a [[Definition:Malpractice claim | malpractice claim]] two years later for treatment rendered during the active policy period, the retired physician bears the full financial burden. For [[Definition:Underwriting | underwriters]], pricing tail coverage demands careful analysis of [[Definition:Loss development | loss development patterns]] and [[Definition:Tail factor | tail factors]] to estimate the volume and severity of late-emerging claims. [[Definition:Insurance broker | Brokers]] routinely advise clients to budget for tail costs well before a policy transition, and many [[Definition:Mergers and acquisitions (M&A) | M&A]] transactions hinge on ensuring that the target company's historical liabilities are protected through appropriate extended reporting provisions.

'''Related concepts'''
{{Div col|colwidth=20em}}
* [[Definition:Claims-made policy]]
* [[Definition:Extended reporting period (ERP)]]
* [[Definition:Professional liability insurance]]
* [[Definition:Tail factor]]
* [[Definition:Prior acts coverage]]
* [[Definition:Retroactive date]]
{{Div col end}}

Definition:Tail coverage - Revision history

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