The gap clause in M&A locked-box deals: how it protects the buyer between locked-box date and completion, how value leakage is defined, and how FDD analysts measure it.
In an M&A transaction structured with a locked-box mechanism, the price is fixed at signing based on a historical balance sheet — typically the most recent year-end or month-end accounts. The buyer therefore agrees to pay a price set on numbers that are already weeks or months old by the time the deal signs, and possibly six to twelve months old by the time the deal closes. The gap clause is the contractual mechanism that protects the buyer against the seller stripping value out of the business during that gap. This post explains what the gap clause is, why it exists, how it is drafted in the SPA, and what an FDD analyst does to measure it.
A gap clause — sometimes called a leakage clause or no-leakage covenant — is a clause in the Share Purchase Agreement (SPA) of a locked-box deal that:
In other words: between locked-box date and completion, the seller is the legal owner of the business but is contractually constrained to run it like a custodian, not extract additional value.
The locked-box mechanism is attractive because it gives both sides price certainty: the headline number doesn't change after signing, no post-completion accounts wrangling. But that simplicity has a cost — the buyer is paying for a business as it looked on the locked-box date, not as it looks on completion day.
Between those two dates, value can leak out in several ways:
Without a gap clause, a seller could legitimately and legally extract €5 m of value in the months before completion and still receive the full headline price — the buyer would have overpaid by €5 m. The gap clause makes that economically impossible by requiring repayment.
A typical gap clause has three building blocks:
This is the prohibited list. A well-drafted leakage definition is broad and forward-looking:
"Leakage" means any of the following payments made or value transferred by any Target Group company to or for the benefit of any Seller or any Connected Person: (a) any dividend, distribution or other return of capital; (b) any payment in respect of any redemption, purchase or repayment of share capital; (c) any waiver, release, settlement or write-off of any amount owed to any Target Group company; (d) any payment of management, monitoring or directors' fees; (e) any payment of advisory, professional or transaction costs incurred by the Sellers; (f) any transfer of assets at below market value; (g) any agreement or commitment to do any of the foregoing.
The breadth of (g) — "any agreement to do any of the foregoing" — is critical. Without it, the seller could lock in a future payment before completion and argue it's not leakage.
This is the carve-out list. It allows the business to operate normally between locked-box and completion:
Each item is typically scheduled with euro amounts to remove ambiguity.
The SPA specifies:
The leakage warranty and covenant are usually uncapped and not subject to thresholds — unlike general warranties — because the leakage amount, if proven, is a pure transfer of value, not a forward-looking risk.
Sell-side and buy-side FDD teams both have a role in the leakage workstream:
Sell-side FDD (in the VDD report):
Buy-side FDD:
A typical leakage analysis involves:
The gap clause is the leakage protection in a locked-box deal. In a completion accounts deal, leakage protection works differently — the completion accounts themselves capture any value leakage automatically, because the buyer pays for the balance sheet as it actually is on completion day, not on a historical date.
The trade-off is well-known:
For more on the trade-off, see Locked Box vs. Completion Accounts in M&A.
Most leakage disputes fall into a few patterns:
A clean gap clause + a tightly drafted permitted leakage schedule are usually enough to avoid these. Sloppy drafting is where post-completion disputes are born.
A gap clause is the contractual mechanism in a locked-box SPA that prohibits the seller from transferring value out of the target company between the locked-box date and completion. Any prohibited transfer ("leakage") must be repaid to the buyer on a euro-for-euro basis.
The gap clause covers the period between the locked-box date (the historical balance sheet date on which the deal price is based) and the completion date (when the buyer takes ownership). Typically that gap is three to twelve months.
Leakage is any prohibited transfer of value to the seller or its affiliates — dividends, share buybacks, related-party payments, asset transfers below market value, debt waivers. Permitted leakage is a scheduled list of payments that are explicitly allowed: ordinary salaries, agreed interest on shareholder loans, pre-declared dividends, tax payments.
No — or rather, the same protection is built into the completion accounts mechanism itself. The buyer pays based on the actual balance sheet at completion, so any value extracted by the seller in the interim simply reduces the completion balance and therefore the price. The gap clause is specifically a locked-box protection.
FDD analysts pull all related-party transactions during the locked-box period, classify them against the SPA's leakage and permitted leakage definitions, and produce a leakage table that quantifies the price adjustment. On the buy-side, the focus is on finding undisclosed leakage — typically hidden in management remuneration, intercompany charges, or non-arm's-length asset transfers.
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