Definition:Extended reporting period (ERP)
📋 Extended reporting period (ERP) is a window of time after a claims-made policy expires or is canceled during which the insured may still report claims for incidents that occurred while coverage was active. Sometimes referred to as "tail coverage," the ERP addresses a structural gap unique to claims-made forms: without it, a policyholder who switches carriers or ceases operations could lose the ability to report valid claims simply because the old policy has ended. ERPs are especially prominent in professional liability, directors and officers (D&O), and medical malpractice insurance, where claims often surface months or years after the triggering event.
⚙️ Most claims-made policies include a basic or "mini" ERP at no additional charge — typically 30 to 60 days — that activates automatically upon policy termination. Beyond that, insurers offer a supplemental ERP, purchased as an endorsement, that can extend reporting rights for one, three, or even five years, and in some cases indefinitely. The cost of the supplemental tail is usually expressed as a percentage of the final annual premium, often ranging from 75% to 200% depending on the line of business and the length of the extension. Once an ERP is triggered, no new retroactive date issues arise — the coverage locks in the same scope that existed under the original policy.
💡 Failing to secure an adequate ERP can leave professionals and organizations financially exposed to latent claims they assumed were covered. For brokers advising clients, the ERP conversation is a critical part of any transition between carriers, mergers, or business closures. On the underwriting side, ERPs represent deferred loss reserve obligations that must be carefully modeled, because the insurer remains on the hook for reported claims long after the policy's active term — and premium collection — has ended.
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