Key insights:
- Sellers remain legally exposed to representations and warranties long after closing.
- The disclosure letter is a seller’s primary defence against post-closing litigation.
- Warranty and indemnity (W&I) insurance transfers financial risk to a third-party insurer.
- Thorough due diligence before signing materially reduces post-closing exposure.
The deal is closed, the funds have cleared, and the leadership team is celebrating. Months later, the buyer discovers an undisclosed regulatory matter and files a claim for €2 million. Under the share purchase agreement, you may owe it.
Selling your business does not mean saying goodbye to liability, and understanding post-closing M&A risk matters more than most founders realise.
The post-closing problem: why your liability doesn’t end at completion
Most sellers think the wire transfer marks the end. Instead, it marks the beginning of a contractual risk period that can stretch for years, during which a single undisclosed liability can wipe out a substantial portion of what you’ve just been paid.
Around one in six insured private M&A transactions gives rise to a warranty claim notification, according to comprehensive transactional insurance data tracking thousands of mid-market deals. A large percentage of these claims stem from non-disclosure, third-party exposures, or fraud that due diligence missed.
When you sign a share purchase agreement, you make dozens of separate representations and warranties covering everything from the accuracy of financial statements to regulatory compliance. If any statement turns out to be false after closing, the buyer has a contractual claim against you as seller for the resulting losses. That claim can remain active for 12 to 24 months for general warranties, six to seven years for tax matters, and typically six years, or longer where fraud is alleged, for fundamental representations covering ownership and corporate authority.
How post-closing liability actually works
A share purchase agreement creates a contractual liability framework typically built on four structures: representations, warranties, indemnities and survival periods.
| Type | Function in M&A | Typical Survival Period |
| General Warranties | Statements of fact (e.g., accurate financials, IP ownership). | 12 to 24 months |
| Fundamental Warranties | Core facts (e.g., valid share ownership, corporate authority). | Often 6 years (or indefinite for fraud) |
| Tax Indemnities | Euro-for-euro reimbursement for pre-closing tax exposures. | 6 to 7 years |
| Specific Indemnities | Direct reimbursement for known, identified risks. | Heavily negotiated, often matched to the underlying risk |
Representations and warranties are statements of fact about the target company and they are legally distinct under English law, because the two attract different remedies, which is why English law share purchase agreements conventionally give warranties rather than representations. You promise the financial accounts are accurate, there’s no undisclosed litigation, intellectual property is properly registered, regulatory filings are up to date, employee matters are compliant, and contracts are validly in place. The buyer relies on these statements to justify the price paid. If any statement is wrong, you’ve breached the warranty, and the buyer can claim damages equal to the loss suffered.
The distinction between “fundamental” and “general” warranties matters enormously for your risk exposure. Fundamental warranties cover share ownership, corporate authority and capitalisation. General warranties cover operational matters like finances, tax, employees, property, intellectual property, compliance and litigation. Fundamental warranties typically survive much longer and carry higher liability caps than general warranties.
Indemnities work differently: Rather than requiring the buyer to prove diminution in value, indemnities operate as direct reimbursement for specific identified risks. Tax indemnities are nearly universal in European deals and create euro-for-euro liability for pre-closing tax exposures that surface years later. Unlike warranties, specific indemnities typically carry no minimum threshold and either no cap or a cap set at the full purchase price, meaning exposure can run to the entire consideration for indemnified items.
Caps and baskets set the financial boundaries: Baskets operate as minimum thresholds before a buyer can claim, while caps (typically 15% to 40% of the purchase price for general warranties) represent your maximum exposure.
Survival periods: determine how long the buyer has to bring a claim. Standard European mid-market practice sets general warranties at 12 to 24 months, tax warranties at six to seven years to match statutory limitation periods, and fundamental warranties at the full statute of limitations, often six years under English law or longer for fraud claims. Once the survival period expires, the claim is barred even if the breach was real.
The disclosure letter: your only real protection
If warranties define what you promise, the disclosure letter defines what you don’t promise. But disclosure must meet a fair disclosure standard. Under English law, which governs most European M&A documentation, properly disclosed matters cannot form the basis of warranty claims. Disclosure transfers the risk from seller to buyer.
General disclosures
The letter comprises two categories. General disclosures consist of publicly available information: Companies House filings, land registry searches, regulatory databases, published accounts and statutory records. Though brief, general disclosures require intense negotiation because sellers want to qualify warranties broadly against public information whilst buyers seek to limit automatic disclosure.
Specific disclosures
Specific disclosures are a detailed list of particular matters cross-referenced to individual warranties. A properly drafted specific disclosure identifies the warranty being qualified, describes the issue in sufficient detail to put the buyer on notice, and references the underlying documents. Courts consistently hold that vague or buried disclosures don’t constitute fair disclosure and therefore don’t protect you from claims.
The standard applied is, in substance, “fair disclosure with sufficient detail to enable a reasonable buyer to identify the nature and extent of the matter disclosed.”
Financial matters require particular attention: accuracy of management accounts and audited financials, off-balance-sheet arrangements, revenue recognition policies, contingent liabilities, regulatory proceedings, and changes in performance between the accounts date and signing. Post-closing regulatory investigations into pre-closing conduct remain your responsibility unless specifically disclosed and indemnified.
Burying a material liability in a 3,000-page data room without specific flagging won’t satisfy this standard. From your perspective as seller, anything not disclosed is a liability you own for the entire survival period.
Warranty and indemnity insurance (W&I): transferring risk away from you
Traditional M&A puts seller and buyer in direct opposition over post-closing risk. Warranty and indemnity insurance reshapes that dynamic by transferring financial risk from the parties to an insurer. Adoption has accelerated sharply across Europe, with record levels in 2024 and 2025.
How a buy-side policy changes your exposure
The dominant European structure is the buy-side policy: the buyer purchases insurance directly, and in the event of a warranty breach, claims against the insurer rather than you. This transforms your liability architecture substantially. Under a buy-side policy, the insurer assumes your warranty liability within the insured limits, allowing your contractual exposure to fall to a nominal level, often limited to fraud only.
Economics in transactions typically involve policy limits of 10 to 40% of transaction value, premiums commonly in the range of 0.9% to 1.7% of the policy limit, retention of 0.5% to 1% of deal value, general warranty survival of two to three years, which commonly extends the period agreed in the share purchase agreement, and tax warranty survival up to seven years. The underwriting process is demanding: insurers require full legal, financial and tax due diligence before binding coverage, and conduct their own underwriting review analysing the reports, the share purchase agreement, the disclosure letter and the business itself.
| Standard W&I Metrics | Typical Range |
| Policy Limits | 10% to 40% of transaction value |
| Premium Costs | 0.9% to 1.7% of the policy limit |
| Retention (Deductible) | 0.5% to 1.0% of deal value |
What it means for sellers and buyers
For sellers, W&I insurance delivers a clean exit: you can distribute deal proceeds immediately without retaining escrow funds. Without insurance, sellers in European private equity transactions often face escrow requirements of 10 to 20% of purchase price held for 12 to 24 months against warranty claims. Insurance can substantially reduce or remove this requirement.
For buyers in competitive auction processes, offering seller-friendly warranty terms backed by W&I insurance has become a bidder qualification factor. The ability to offer near-zero seller recourse backed by an institutional insurer creates a material competitive advantage.
What the claims data shows
The claims data shows the product is being used at scale. Euclid Transactional’s 2025 EMEA claims study records a 333% rise in EMEA and APAC claim notices between 2021 and 2024, although the insurer attributes this to growth in its own policy book rather than to any increase in claim frequency. A more meaningful frequency measure from the same study is that it receives 23 claim notices for every 100 policies bound.
What sellers need to understand
- Closing is not the finish line: Treat the purchase agreement as a living liability framework.
- The disclosure letter is your balance sheet: Founders must be actively engaged in drafting it, as undisclosed items equal contingent liabilities.
- Know your cap: Understand that tax and specific indemnities usually bypass your liability ceiling.
- Insurance is expected: When raising capital or exiting, W&I strategy is vital.
Return to the €2 million claim that opened this piece. Whether the seller pays it turns on a small number of decisions taken months earlier: whether the regulatory matter was specifically disclosed rather than buried in the data room, whether the general warranty survival period had already expired, whether the claim fell inside the cap or sat outside it as a specific indemnity, and whether a W&I policy stood between the buyer and the seller’s own balance sheet.
Understanding these structures is what separates a genuinely clean exit from one that leaves you exposed. Getting paid is one milestone, and keeping what you have been paid is a different and longer exercise in risk management that begins well before completion. For sellers navigating European mid-market M&A, contact us today to discuss structuring your next M&A transaction.
