Every lawyer eventually leaves — a firm, a partnership, or the profession. And because malpractice policies are written on a claims-made basis, leaving raises a question occurrence policies never ask: who covers the claim that arrives after you’re gone, for work you did before? That’s the job of tail coverage. Here’s how it works, what it costs, and — just as important — when you don’t actually need it.
The short answer
Tail coverage (formally, an extended reporting period or ERP) lets claims be reported after your claims-made policy ends, for work performed while it was active. It’s not new insurance — it extends the window for reporting claims on your old work. Expect an unlimited tail to cost roughly one-and-a-half to three times your final annual premium as a one-time purchase. Retiring lawyers often don’t have to pay it at all: many policies include a free retirement tail after several consecutive years with the carrier. And lawyers who are simply changing firms usually need prior-acts continuity, not a tail — a distinction that saves real money when handled correctly.
Why tail exists at all
A claims-made policy covers claims made while the policy is in force. Cancel it, retire, or let it lapse, and coverage ends for everything — including the decade of work behind you. Legal malpractice claims commonly surface a year or more after the work was done: a missed deadline discovered at appeal, an estate issue that emerges when someone dies. The tail is the mechanism that keeps your past work claimable after the policy stops.
The four situations, and what each actually requires
1. Retiring. This is what tails are for. Buy one — or better, qualify for the free one. Many lawyers’ policies include a no-cost retirement ERP after roughly three to five continuous years with the carrier. If you’re within a few years of retiring, this belongs in your renewal conversation now, because switching carriers late can reset the clock on a free tail worth tens of thousands of dollars.
2. Moving to another firm. Usually no tail needed — and this is the mistake we see most. What you want is for your new firm’s policy to pick up your prior acts date so your history rides along. The trap: relying on your old firm’s policy to protect your past work means trusting them to keep renewing coverage after you’ve left — something you can neither control nor see. Get endorsed onto the new firm’s policy with your original retro date preserved.
3. A firm dissolving or being acquired. The dissolving firm should buy a tail as part of winding down — once the entity’s policy ends, every former partner’s exposure for firm work is orphaned without one. In an acquisition, tail-vs-prior-acts is a negotiated deal point; get it in writing before closing.
4. Switching carriers (firm stays put). No tail — the new policy should carry your retroactive date forward. But confirm it in the quote, not after binding. A new policy with a new retro date quietly erases your history; that’s the claims-made trap in its most expensive form.
What tail costs, and the levers
- Duration: tails come in one-to-six-year and unlimited flavors. Legal malpractice claims have long discovery timelines — unlimited is usually worth the difference for anyone actually exiting practice.
- Price: commonly 150%–300% of the expiring annual premium, one-time. A firm paying $10,000/year might see $20,000–$30,000 for an unlimited tail.
- The free-tail provisions: death, disability, and retirement tails are frequently built in after a tenure threshold — but the definitions and thresholds vary by carrier, and they’re exactly the fine print a curated coverage review reads before you need it.
The bottom line
Tail decisions are one-time, irreversible, and priced in multiples of your premium — which makes them the most expensive place in legal malpractice insurance to guess. If a move, merger, wind-down, or retirement is anywhere on your horizon, talk to an advisor before the paperwork starts. Fifteen minutes of continuity planning routinely saves five figures.
FAQ
What does tail coverage cost?
Typically a one-time charge of 150%–300% of your final annual premium for an unlimited extended reporting period; shorter fixed terms cost less.
Do I need tail coverage when changing law firms?
Usually not — you need your new firm’s policy to endorse you with your original prior-acts date. Tail is for when coverage is ending, not moving.
Is retirement tail coverage free?
Often, yes — many carriers include a free retirement ERP after three to five consecutive years on the policy. Confirm your carrier’s tenure requirement before switching insurers late in your career.
What happens if a firm dissolves without buying tail?
Former partners are personally exposed on all firm work with no reporting mechanism — claims arriving after dissolution would find no active policy to respond.
Companion pieces: Claims Made vs. Occurrence · What malpractice insurance costs · Texas requirements
