Why does Material Adverse Change (MAC) Clause matter?
There is a real gap in time between signing a definitive agreement and closing (regulatory approval, financing, or other conditions can take weeks or months) and this clause allocates the risk of something going wrong in that gap. How narrowly or broadly "material adverse change" is defined determines whether a buyer can invoke it opportunistically to renegotiate or exit a deal that has simply become less attractive for reasons unrelated to the target's own performance.
What does Material Adverse Change (MAC) Clause look like in practice?
Suppose a deal is signed in March with a June closing, and in April the target loses its largest customer, representing 25% of revenue. A broadly worded MAC clause gives the buyer grounds to walk or demand a lower price; a narrowly worded one, carving out ordinary competitive losses and requiring a change that is disproportionate and durable, might not be triggered by a single customer loss, forcing the buyer to close on the original terms or breach the agreement itself.
What are the common mistakes with Material Adverse Change (MAC) Clause?
- Signing a broadly defined MAC clause that gives the buyer wide discretion to walk away over ordinary business fluctuations.
- Not negotiating carve-outs for industry-wide events, general economic conditions, or changes caused by the buyer's own announcement of the deal.
- Treating the gap between signing and closing as risk-free once the agreement is signed, when a MAC clause means the deal is not truly final until closing.
- Failing to model what happens to the business, and to employees who have already been told about the deal, if a MAC dispute drags out or the deal collapses.
Related concepts
- Letter of Intent (LOI)A short, mostly non-binding document signed early in an acquisition that lays out the proposed price, structure, and timeline before either side commits to full due diligence and definitive legal documents.
- Representations and WarrantiesFactual statements the seller makes in the purchase agreement about the state of the business (ownership of assets, accuracy of financials, no undisclosed liabilities) that the buyer relies on in deciding to close, and that create liability if they turn out to be false.
- Break-Up FeeA fee, agreed in the definitive acquisition agreement, that one party pays the other if the deal fails to close for a specified reason, most often the seller taking a better competing offer, or the buyer failing to secure financing.