How to Obtain Extended Reporting Period (Tail) Cover for M&A or Business Sale

The Answer in 60 Seconds

If your SME is being sold, wound down or restructured, watch the claims-made policies — directors' & officers' (D&O), professional indemnity (PI), cyber, employment practices liability (EPL), crime. A claims-made policy responds to a claim only if the claim is made while the policy (or its extended reporting period) is in force — not based on when the underlying act happened. So when such a policy terminates at completion, a claim that surfaces afterwards about something done before completion can fall into a gap: the old policy has ended, and a buyer's new policy will normally exclude pre-acquisition acts through its retroactive date. The fix is an Extended Reporting Period (ERP) — also called tail or run-off cover — an endorsement that keeps the expiring policy open to report claims for a defined period after it ends, for acts committed before it ended. The practical work: identify every claims-made policy and its retroactive date early; get tail quotes during due diligence; decide the length; settle who pays for it in the Sale and Purchase Agreement (SPA); and bind it at completion. COVA does not advise on or arrange policies; it routes you to a licensed adviser.

The Sourced Detail

The Extended Reporting Period is the mechanism that bridges the structural gap in claims-made insurance when a policy ends. It matters most in M&A, because a seller's directors and officers can remain personally exposed for pre-completion conduct that only surfaces after the deal has closed.

Why claims-made cover creates a gap

Insurance policies trigger in one of two ways:

Occurrence-based cover (such as public liability, property, and Work Injury Compensation) responds to an event that occurs during the policy period, even if the claim is made years later.
Claims-made cover (such as D&O, PI / E&O, cyber, EPL and crime) responds to a claim first made during the policy period — and, crucially, does not respond to a claim made after the policy has expired, even if the underlying act happened while the policy was live.

That second feature is the gap. When a claims-made policy terminates with no ERP, an act committed during the policy period is no longer covered once the policy ends; and the buyer's go-forward policy will normally exclude that act because it predates the buyer's retroactive date. The people left exposed are typically the seller's former directors and officers, personally — and D&O, regulatory and similar claims can surface years after a deal closes.

When tail cover is needed

Tail cover comes into play whenever a claims-made policy is about to end without an equivalent policy picking up the historic exposure:

M&A — an asset sale where the target's policies are not assumed, or a share sale where the buyer cancels the target's policies.
Business change — closure or wind-down, ceasing a regulated activity (for example a MAS-licensed entity surrendering its licence), or simply not renewing a policy.
Personal change — a director resigning, or a professional retiring, who wants protection for past acts.
Insurer-driven — non-renewal or cancellation by the insurer.

The legal backdrop — why limitation periods matter

The reason a tail has to last years, not months, is that the underlying legal claims can be brought long after completion. Under the Limitation Act 1959, the general limitation period for actions founded on contract or tort is six years (with a longer period for actions on a deed, and the period postponed in cases of fraud or deliberate concealment). Claims by a company against its directors for breach of the statutory duties in section 157 of the Companies Act 1967 are generally subject to limitation in the ordinary way. The length of a tail is therefore usually considered against two horizons: the limitation period during which a claim could still be brought, and the indemnity and warranty-claim windows the SPA itself sets (which often run shorter for general warranties and longer for tax or title).

How tail cover works — and what it does not cover

A tail (ERP) is an endorsement to the expiring policy. It extends the time within which a claim may be reported, for acts that occurred before the policy ended (back to the retroactive date). It does not cover new acts committed during the tail period itself — there is no new exposure being insured, only a longer window to report old exposure.

Other features to understand: the exclusions of the original policy carry through to the tail; the available limit is the original policy's limit (often a single limit for the whole tail period, not reinstated annually); and where a claim could touch both an old and a new policy, the policies' "straddle claim" wording determines which responds. The persons covered should be checked carefully — former directors and officers, and predecessor entities, need to fall within the definition of insured.

Choosing the length

Tails are commonly offered in fixed lengths — for example one, three or six years. The longer the tail, the higher the premium: tail premium is usually quoted as a percentage of the expiring annual premium, and that percentage rises steeply with length (the exact figures depend on the risk, the line of cover and the insurer — they are a matter for a quote, not assumption). Choosing the length is a judgement that weighs the limitation horizon, the SPA's indemnity windows, the nature of the business (regulated activities and professional services tend to carry longer-tail risks), and cost. Where the existing insurer will not offer the tail, run-off and specialty markets may.

The buyer-side alternative: "prior acts" cover

A separate seller tail is not the only route. A buyer may be able to extend the retroactive date of its own go-forward D&O (or other claims-made) policy to pick up the target's pre-acquisition acts — sometimes called "prior acts" or "nose" cover. Whether this is available, and how it compares on cost and scope with a stand-alone tail, depends on the buyer's insurer. It is worth analysing both options rather than defaulting to a tail.

Getting it into the deal — the SPA

Tail cover should be a documented term of the Sale and Purchase Agreement, not an afterthought at completion. The SPA should address who buys the tail (commonly the seller, often funded from sale proceeds, but split arrangements are negotiated), the length, any cost cap, the named insureds to be covered (former directors and officers, predecessor entities), and the remedy if the obligation is not performed. Resolving this during due diligence — when there is still time to get quotes and compare the buyer-side alternative — avoids a scramble at closing.

Common Mistakes / What Goes Wrong

Leaving tail cover until completion. No time to get quotes, compare options or negotiate who pays.
A tail that is too short. Cover that lapses while claims can still be brought within the limitation period.
Silence in the SPA. No clear allocation of the tail obligation and cost, producing a dispute at closing.
Wrong named insureds. Former directors, officers or predecessor entities left outside the definition of insured.
Losing the retroactive date. A gap opening because historic acts are no longer picked up.
Ignoring the buyer-side option. Not analysing whether "prior acts" cover on the buyer's policy is a better answer.
Forgetting the limit is finite. Assuming the tail limit reinstates annually when it is usually a single limit for the whole period.
Being surprised by carried-over exclusions. Expecting the tail to be broader than the original policy.
No claim-notification discipline during the tail. Missing the reporting requirement that is the entire point of the cover.

What This Means for Your Business

For a Singapore SME in an M&A deal or a major restructuring, tail cover is a due-diligence item, not a closing formality.

Map your claims-made policies early — line, insurer, retroactive date, limit — well before the deal documents are signed.
Get tail quotes during due diligence — in more than one length.
Test the buyer-side alternative — "prior acts" cover on the buyer's policy.
Choose the length deliberately — against the limitation period and the SPA's indemnity windows.
Write it into the SPA — who buys it, how long, who pays, who is covered, what happens if it is not bought.
Bind it at completion — and confirm the named insureds and the retroactive date.
Keep notifying claims — the tail only works if claims are reported within it.

The cost of a tail is real and rises with its length, but it is quantifiable in advance. The cost of having none is open-ended: former directors and officers personally exposed to claims, with no policy to respond, potentially years after the deal has closed.

Questions to Ask Your Adviser

Which of our policies are claims-made, and what is the retroactive date on each?
How long should the tail run, given the limitation period and our SPA's indemnity windows?
Is "prior acts" cover on the buyer's policy a viable alternative to a stand-alone tail, and how do they compare?
Does the SPA clearly allocate the tail obligation, length, cost and named insureds?
Who exactly is covered by the tail — are former directors, officers and predecessor entities included?

Related Information

Published 17 May 2026. Source verified 17 May 2026. COVA is an introducer under MAS Notice FAA-N02. We do not recommend insurance products. We provide factual information sourced from primary regulators and route you to a licensed IFA who can match a policy to your specific situation.