What impact does a MAC have on enterprise value?
TransactionsAn analysis of how a MAC clause can affect enterprise value, equity value, and negotiation dynamics in an M&A transaction.

In every M&A transaction, the pricing mechanism is a key part of the agreement. It determines not just the ultimate purchase price, but how risks are shared between buyer and seller. In practice, one of two systems is generally used: the locked-box mechanism and closing accounts.
Although the two methods aim to achieve the same goal – a fair, transparent and balanced price – they differ fundamentally in terms of approach, timing and risk management. The choice between the two can have a significant financial impact.
A locked-box mechanism fixes the company’s economic value at a predetermined historical date known as the locked-box date. From that date on, all economic risks and benefits pass to the buyer. Unless otherwise agreed, value cannot ‘leak’ out of the company from then on, other than in the form of predefined and monitored transactions (permitted leakage).
The locked-box mechanism requires the financial figures on the locked-box date to have been reliably and thoroughly analysed during the due diligence process. The buyer must be able to rely on the accuracy of the historical information, as no further adjustments will be made at the time of closing.
With closing accounts, the purchase price is only finalised at the time of closing. Although an initial price is agreed during the negotiation phase, this is adjusted at closing based on the company’s current financial position. The adjustments generally relate to cash position, debt position and working capital.
Closing accounts provide a more accurate pricing mechanism when a company’s performance fluctuates significantly or when recent financial information is more relevant than historical figures.
The decision to use a locked-box mechanism or closing accounts depends on various factors that influence risk allocation and transaction dynamics. In practice, three factors play a decisive role:
Locked box and closing accounts are both well-established and valuable tools in M&A transactions, but they serve distinct and different purposes. Locked box offers speed, simplicity and price certainty – ideal in stable environments with reliable financial reporting. Closing accounts, on the other hand, provides greater accuracy and better safeguards for the buyer when recent financial performance is more relevant than historical figures.
Choosing the right mechanism requires an understanding of the company’s financial stability, the quality of the available information and the dynamics of the negotiations between the parties. Careful consideration of these factors contributes to an efficient transaction and a balanced distribution of risks.
An analysis of how a MAC clause can affect enterprise value, equity value, and negotiation dynamics in an M&A transaction.
Dit artikel legt uit wanneer inflatie ondernemingswaarde verlaagt (marge erosie, hogere rente/discontovoeten, meer onzekerheid) en wanneer ze net waarde kan creëren (sterke pricing power, lagere reële schuldlast, schaarse activa en geïndexeerde cashflows zoals vastgoed en infrastructuur).