Effective December 19, 2025, merger notifications filed in Mexico are subject to a new filing fee framework implemented by the National Antitrust Commission (CNA). The applicable fee is determined based on the Maximum Estimated Value (MEV) of the transaction in Mexico and must be paid upon filing, regardless of the complexity, duration, or outcome of the review process. The MEV is calculated by assessing various valuation parameters, including the transaction value and the Mexican assets or equity interests involved, and must reflect the highest resulting value.
This new framework has a direct impact on transaction structuring, timing, and regulatory strategy, making early MEV analysis a critical component of deal planning.
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