What is a material adverse change (MAC) clause under Dutch law?

Dutch term: Material adverse change clausule | Legal basis: Freedom of contract

A material adverse change (MAC) clause in a Dutch commercial contract or M&A share purchase agreement allows a party to withdraw from or renegotiate the transaction if a material adverse change in the target company's business, financial condition or prospects occurs between signing and closing. MAC clauses are governed by freedom of contract under Dutch law.

Dutch courts interpret MAC clauses restrictively. The party invoking the MAC must demonstrate that the change is genuinely material and falls within the scope of the clause as drafted. Carve-outs for general market conditions, industry-wide developments and known risks at signing are standard. The interaction between a MAC clause and the general Dutch good faith standard (article 6:248 BW) can affect both the scope and the exercise of the clause.

Why it matters for international businesses

For international M&A transactions involving Dutch targets, the MAC clause is one of the most heavily negotiated provisions. Clear drafting of what constitutes 'material', the measurement methodology, and the exceptions is essential for enforceability.