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Nuevas regulaciones fiscales y su impacto legal en la estructura corporativa

by Editor Digital
04/30/2026

New Tax Regulations and Their Legal Impact on Corporate Structures

Recent transformations within the Mexican and global tax framework represent a turning point for corporations. Beyond simple regulatory adjustments, these reforms create direct implications for how organizations structure their operations, manage legal risks, and respond to tax authorities. In 2026, the intensified oversight exercised by Mexico’s Tax Administration Service (SAT) constitutes not only a revenue-collection policy, but also a stringent legal enforcement mechanism capable of challenging corporate structures that are inadequately designed or insufficiently transparent.

Recent Evolution: Intensified Audits and Record-Breaking Tax Collection

During 2025, the SAT substantially increased its audit and collection activities, reaching historic levels. Between January and December 2025, tax revenues totaled MXN 6.045 trillion, exceeding approved targets and achieving real growth of nearly 4.8% compared to 2024. This reflects the increasingly proactive role of the tax authority as a key actor in corporate compliance enforcement.

Simultaneously, specialized reports estimate that the SAT quadrupled its secondary collection targets from large taxpayers through comprehensive audits aimed at identifying accounting discrepancies and undeclared income.

These figures are not merely fiscal statistics; they demonstrate that corporations no longer operate in an environment where tax oversight is marginal or tolerable, but rather in one where it has become a central legal factor intersecting with corporate structuring, governance, and compliance strategies.

Cases Illustrating the Legal Impact on Corporate Structures

A recent paradigmatic example is the case involving Ricardo Salinas Pliego, whose corporate group faced judicial rulings requiring the payment of substantial tax liabilities following legal disputes with the SAT. This case demonstrates that even highly sophisticated corporate groups with complex financial structures remain subject to intense judicial scrutiny, and that consolidated group status does not create a legal shield against individual tax enforcement actions.

Such rulings involve not only significant financial exposure, but may also fundamentally reshape how corporate groups design their structures, intercompany agreements, and tax consolidation practices in anticipation of future tax litigation.

Criminal Tax Enforcement for Damages to the Treasury

Since the first half of 2025, the SAT has initiated more than 109 criminal proceedings related to tax damages totaling nearly MXN 23 billion, primarily associated with smuggling operations and unlawful customs practices.

This type of criminal enforcement represents a profound transformation of the regulatory environment because it shifts tax controversies from the administrative sphere into criminal litigation, exposing corporate assets, legal officers, and governance structures to expanded liability risks.

Corporate Structures Under Heightened Scrutiny

Today, tax authorities no longer review only tax returns. They actively analyze:

The genuine economic substance of each entity
Consistency between functions, risks, and profits
Intercompany transactions
Internal financing arrangements

The current trend also includes greater criminal judicialization in specific circumstances, significantly increasing exposure levels for directors, officers, and legal representatives.

What Does This Mean for Your Organization?

Corporate structures designed years ago may no longer withstand current audit standards
Entities lacking clear operational substance increase contingency exposure
Insufficient documentation in intercompany transactions may trigger substantial tax adjustments
Boards of directors may face enhanced supervisory liability

Key Regulatory Changes Impacting Corporate Structures

1. Digital Tax Audits and Digital Platforms

The latest Mexican Miscellaneous Tax Resolution introduces provisions allowing the SAT to access digital platform information in real time and imposes new withholding obligations effective April 2026. This measure requires companies operating through marketplaces or applications to adapt their structures in order to ensure immediate compliance and avoid sanctions or digital service restrictions.

2. Tariff Adjustments and Expanded SAT Powers

Mexico’s 2026 Economic Package contemplates higher tariffs on imported goods lacking trade agreement protections, along with expanded SAT authority over foreign digital platforms. This new framework of “digital tax control” requires multinational organizations to reassess their corporate structures, international agreements, transfer pricing policies, and substantive economic presence in Mexico.

3. Intensified Audits for Large Taxpayers

Official statistics indicate that audits of large taxpayers have increased substantially, with real growth exceeding 23% in collected amounts compared to the previous year. This implies that even organizations with sophisticated structures may become subject to comprehensive operational reviews, ranging from the accuracy of tax filings to the structural design of their legal entities, particularly where persistent discrepancies are identified.

Legal Implications for Corporate Structures

The principal effects of these new regulations on corporations include:

✔ Review of corporate structures and the actual functions performed by each entity

Authorities are no longer reviewing only tax filings; they are examining whether structures possess genuine economic substance or are being used for aggressive tax optimization schemes that may later be challenged during audits.

✔ Expanded liability for directors and officers

In certain cases, authorities may impose joint or even criminal liability upon directors and executives where tax practices are deemed intentional or fraudulent.

✔ Increased legal and compliance costs

Corporations are investing more heavily in robust tax compliance frameworks, continuous internal audits, and specialized professional advisory services to mitigate legal contingencies.

Considerations for Corporate Decision-Making

In light of this evolving tax environment, corporations should:

Review their corporate and contractual structures through a preventive legal-risk approach before regulatory intervention occurs
Strengthen corporate governance through tax audit committees integrated into overall business strategy
Thoroughly document related-party transactions and digital-platform operations to avoid burdensome tax adjustments
Update compliance policies to incorporate digital tax-data access controls and automated withholding mechanisms

Mexican tax regulations are no longer limited to technical changes involving rates or tariffs; they represent structural transformations redefining how corporations must organize operations and manage legal exposure. Enhanced audits, expanded SAT authority, and digital enforcement mechanisms require organizations to approach corporate structuring not only from a tax-efficiency perspective, but also through standards of legal compliance, transparency, and institutional sustainability.

In this environment, close collaboration among boards of directors, legal and tax departments, and specialized external counsel becomes a critical element in protecting not only corporate assets, but also long-term operational continuity within an increasingly demanding regulatory framework.

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