When a firm changes E&O carriers, the work it is doing now moves over without much thought. The work it did in the past is what can get stranded. Because most E&O is claims-made, your past work is only protected if the coverage deliberately carries it forward. There are two tools for that, nose and tail, and they solve the same problem from opposite ends. If claims-made and retroactive dates are new to you, start with claims-made vs occurrence.
The problem both tools solve
Claims-made coverage responds based on the policy in force when a claim is made, back to a retroactive date. Switch carriers carelessly and the new policy can start with a fresh retro date, leaving everything you did before the switch unprotected. A claim on old work then arrives to find no policy that reaches it. Nose and tail are the two ways to keep that from happening. The prior-acts-trap-switching-eo-carriers article covers how that gap forms in detail.
Nose coverage: carry the past forward
Nose coverage, also called prior acts coverage, works on the new policy. When you move to a new carrier, that carrier agrees to match the retroactive date from your old policy, so your past work rides forward and the new policy handles claims on it. Nothing stays behind. Your history and your current coverage sit together on one policy. This is often the cleanest outcome when you are moving from one claims-made policy to another, because there is a new policy ready to carry the past. The cost is generally reflected in the new policy the new carrier issues.
Tail coverage: keep reporting on the old policy
Tail coverage, also called an extended reporting period, works on the old policy. Instead of moving the past forward, you keep the ability to report claims to the departing carrier for a set time after that policy ends, for work done while it was in force. The past stays where it happened. Tail is generally bought from the carrier you are leaving, as a separate charge, and the length and terms vary.
When each one applies
The two tools fit different situations. Nose coverage fits when you are moving to a new claims-made policy and the new carrier is willing to grant prior acts. The new policy simply picks up the history. Tail coverage fits when there is no new policy to carry the past, such as closing or winding down the firm or retiring, or when the new carrier will not match your old retro date. In that second case, the tail on the old policy fills the gap the new one left open.
Which one fits
For most carrier switches, this comes down to a single question: will the new carrier grant prior acts back to your old retro date? If yes, nose coverage on the new policy is often the simpler path, and you generally will not need a tail. If no, or if you are not replacing the policy at all because the firm is winding down, tail coverage on the departing policy is how you protect the past. You rarely need both. What you cannot do is skip the decision, because doing nothing is what strands your old work. Compare the cost and terms of each before you switch, not after a claim shows up.
Questions to ask your advisor
- Will my new carrier grant prior acts back to my current retroactive date?
- If not, what does a tail on my old policy cost and how long does it run?
- Am I switching to a new policy, or winding down with no new coverage to carry the past?
- Does nose or tail leave any gap between the two policies?
- Which option is more economical for my situation once terms are compared?
Nose and tail are two answers to the same question: how does your past work stay covered when your E&O carrier changes. Nose coverage carries the history forward on the new policy. Tail coverage keeps reporting open on the old one. One usually fits a given switch, and the wrong move is choosing neither. Decide before you sign, so a claim on old work never arrives to find a gap nobody planned for.
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