Malpractice Tail Coverage

An extended reporting period endorsement or standalone insurance policy that covers professional liability claims arising from legal work performed before a law firm's professional liability policy terminated — typically because the firm dissolved, merged into another entity, or an individual lawyer retired or left private practice — but that are asserted or reported after the original policy's coverage period has ended. Because most law firm malpractice policies are written on a claims-made basis, meaning coverage depends on when a claim is reported rather than when the underlying conduct occurred, a firm or lawyer with no active policy in place when a claim is eventually filed has no coverage for that claim, regardless of when the alleged malpractice actually occurred. Tail coverage is a standard, often bar-recommended or malpractice-carrier-required, purchase at the point of firm dissolution, merger, or an individual partner's retirement, and its cost is typically a multiple of the firm's most recent annual premium, scaled to the length of the tail period purchased. Partnership agreements and merger agreements typically specify who bears the cost of tail coverage — the dissolving or acquired firm's partners collectively, the surviving firm in a merger, or the individually retiring partner — since the obligation can represent a material, one-time expense at exactly the moment the firm's revenue-generating capacity is winding down.

Unfunded tail coverage obligations are a frequently underestimated liability in firm dissolution and merger financial planning, and capital providers and merger counterparties evaluating a firm transition should confirm tail coverage funding is addressed explicitly, since an uninsured malpractice claim asserted after dissolution can create personal liability exposure for former partners with no firm entity left to absorb it.

In merger negotiations, allocation of tail coverage cost for the acquired firm's pre-merger conduct is a standard, sometimes contentious, term because the surviving firm has no interest in bearing open-ended liability exposure for legal work it did not perform or supervise.