Author: Fabiola G. Rochín.
Foreign trade in Mexico is undergoing a profound transformation. The landscape projected toward 2026 will be defined by increased enforcement pressure, the strengthening of customs control mechanisms, and a structural shift in how authorities assess the legality, materiality, and traceability of import and export operations.
This scenario is not temporary. It responds to a sustained strategy by tax and customs authorities aimed at closing gaps in tax evasion, combating abusive schemes, and increasing revenue collection, while aligning enforcement practices with international standards derived from the USMCA (T-MEC) and multilateral organizations.
One of the most significant developments is the evolution of the concept of materiality as applied to foreign trade operations. Today, it is no longer sufficient to comply formally with customs entries, electronic invoices (CFDI), or transportation documents; authorities now require comprehensive evidence that operations are genuine, economically justified, and consistent with the company’s operational, financial, and logistical capacity.
Enforcement efforts are no longer limited to identifying arithmetic or documentary errors. Instead, they focus on analyzing supply chains, goods flows, transfer pricing, customs valuation, and the consistency between customs operations and tax records.
Within this context, instruments such as the Electronic Value Declaration (MVE) have assumed a strategic role in the new foreign trade enforcement model. Its proper preparation, transmission, and documentary support have become critical review points for authorities, as the MVE serves as a direct source to validate not only the declared customs value of goods, but also the valuation methodology applied, the economic reasonableness of the transaction, and the consistency among the importer’s tax, customs, and financial information.
In this regard, Mexico’s Tax Administration Service (SAT) has announced that the mandatory transmission of the MVE through the Single Window for Foreign Trade (VUCEM) will become enforceable as of April 1, 2026, granting companies a transition period to adapt their internal processes. Until March 31, 2026, importers may comply with the obligation either by transmitting the MVE electronically through VUCEM or by continuing under the traditional compliance scheme currently in place.
This transition period should not be viewed as a mere operational extension, but rather as a strategic opportunity to strengthen compliance processes, review valuation methodologies, cleanse supporting documentation, and align key areas such as foreign trade, tax, legal, and finance. Deficient implementation of the MVE—particularly in an environment of AI-driven electronic audits—may become an immediate trigger for electronic reviews, valuation adjustments, and significant tax contingencies in the years following 2026.
The SAT has established increasingly ambitious enforcement targets, supported by technological tools, massive data cross-checks, and risk analysis models. Companies engaged in foreign trade operations—regardless of size—are subject to continuous and preventive oversight, even before a formal audit is initiated.
Authorized programs such as IMMEX and Strategic Bonded Warehouses (RFE), while remaining key competitiveness instruments, are now subject to significantly heightened scrutiny. Authorities assess not only compliance with program requirements, but also operational consistency, inventory controls, return of goods, final destination of merchandise, and the correct application of tax and customs benefits.
Companies conducting definitive imports, temporary imports, or mixed schemes face an environment where any deviation may trigger in-depth reviews, suspension from registries, revocation of benefits, or material tax contingencies.
One of the most relevant factors in today’s enforcement environment is the exponential increase in the use of artificial intelligence and advanced technological tools by tax and customs authorities. These technologies not only allow authorities to audit a larger number of taxpayers in less time, but also enable far more sophisticated analytical capabilities.
Authorities are now able to:
- Build risk profiles from large volumes of data
- Identify replicable non-compliance patterns
- Detect anomalies in customs value, origin, returns, inventory, and tax operations
- Trigger information requests, invitation letters, electronic audits, and in-depth examinations, often without physical interaction
This predictive approach has fundamentally altered enforcement logic: companies are no longer selected randomly, but through automated risk models, significantly increasing the likelihood of audits when structural compliance weaknesses exist.
For IMMEX companies holding VAT and Excise Tax Certification (CIVA), the environment is even more demanding. Compliance with Section C of Annex 24 grants authorities unprecedented visibility into a company’s customs and operational behavior.
Annex 24 is not merely an inventory control system; it is a real-time enforcement tool that enables authorities to:
- Monitor entries, exits, returns, and transfers
- Detect inconsistencies immediately
- Continuously assess compliance with IMMEX program requirements and certification conditions
Looking toward 2026, it is highly likely that authorities will initiate mass electronic audits based on Annex 24 data, supported by artificial intelligence. This area remains one of the most sensitive enforcement fields, as serious errors may result not only in tax assessments and program cancellations, but also in the classification of aggravated smuggling offenses.
Adding to this landscape is the increasingly active and stringent role of the Ministry of Economy (SE) in reviewing IMMEX programs. In 2025 alone, more than 600 IMMEX programs were suspended, due to operational inconsistencies, documentary non-compliance, or insufficient internal controls.
This confirms that IMMEX is no longer considered a low-risk regulatory scheme. Oversight is continuous and coordinated among tax, customs, and economic authorities, significantly increasing exposure for participating companies.
The road to 2026 will also be shaped by amendments to the Customs Law aimed at further digitalizing customs procedures and processes. While these measures seek operational efficiency, they also provide authorities with enhanced digital inputs to feed analytical systems, automated cross-checks, and electronic audits.
Each digitalized procedure generates:
- More structured information
- Greater traceability
- Additional data points for AI-based electronic reviews
Another highly relevant development stemming from amendments to the Federal Tax Code (CFF) effective toward 2026 is the elimination of the exemption that previously allowed taxpayers to avoid guaranteeing tax liabilities while a revocation appeal was pending. Under the new framework, taxpayers will be required to provide a guarantee for tax credits from the moment the administrative appeal is filed, substantially altering defense strategies and tax risk management.
Additionally, the tax guarantee system has been restructured into a hierarchical and sequential framework, limiting discretion in the selection of guarantee mechanisms and making compliance more complex. This change will directly affect corporate liquidity and financial planning, reducing response times and flexibility when facing tax assessments. Consequently, enforcement procedures must be addressed technically, promptly, and strategically from the outset to prevent them from resulting in tax credits or penalties that, under the new regime, will demand immediate financial capacity and enhanced risk management.
This intensified enforcement environment is further compounded by a significant increase in criminal exposure for companies, resulting from amendments to Article 19 of the Mexican Constitution, which now classify offenses such as smuggling and the use of false tax invoices as crimes subject to mandatory pretrial detention.
This reform substantially heightens the consequences of non-compliance, as certain irregularities in foreign trade operations—whether arising from operational errors, control deficiencies, or incorrect interpretations—may now fall within the scope of criminal liability. In practice, issues such as incorrect customs valuation, inventory inconsistencies, improper use of tax benefits, Annex 24 failures, or invalid tax documentation may evolve from administrative or tax contingencies into potential criminal investigations. This reality underscores the need for robust compliance frameworks, strong internal controls, and specialized handling of enforcement procedures to prevent errors or omissions from escalating into criminal consequences.
It must also be acknowledged that 2026 will coincide with a highly debated review process of the USMCA (T-MEC), adding a layer of uncertainty for the sector. The redefinition of rules, commitments, and enforcement mechanisms could impact supply chains, rules of origin, customs practices, and international operating models.
This context requires companies to prepare for evolving scenarios where strategic planning and compliance take on heightened importance.
As 2026 approaches, the message is clear: the reactive model of addressing audits is no longer viable. The environment demands a preventive, comprehensive, and continuous approach to legal, tax, and customs compliance.
Organizations must strengthen internal processes, properly document operations, periodically validate their foreign trade structures, and anticipate risks before they materialize into contingencies. This requires moving beyond operational compliance toward a strategic view of customs and tax risk.
Preventive audits in foreign trade have become indispensable for companies seeking operational continuity, legal certainty, and sustainable business models. Their purpose is not merely to identify errors, but to assess the robustness of compliance, identify areas of exposure, and strengthen defensive positions against potential audits.
Implementing preventive audits enables companies to:
- Validate proper application of customs and tax regulations
- Ensure compliance in critical areas
- Assess the materiality and traceability of operations
- Strengthen supporting documentation for audits
- Correct errors before they are detected and sanctioned by authorities
- Reduce exposure to tax credits, penalties, and program cancellations
Against this backdrop, having a strategic partner specialized in foreign trade becomes critical. ST Stratego provides preventive audit services, comprehensive diagnostics, legal defense, and technical advisory support focused on IMMEX, RFE, and import-export companies, aligned with current enforcement trends and the challenges ahead.
ST Stratego’s approach combines regulatory expertise, operational analysis, and strategic insight, enabling companies not only to comply, but to anticipate risks and make informed decisions in an increasingly demanding environment. Its experience in both the public and private sectors allows for a deep understanding of regulatory logic, risk identification, and the design of technically sound compliance and defense strategies. This translates into the ability to objectively assess risks, implement effective controls, and ensure operational continuity while reducing tax, customs, and criminal exposure.
At the same time, ST Stratego possesses the technical strength required to respond promptly and strategically to contingent situations—such as audits, electronic reviews, enforcement actions, or administrative and legal proceedings—ensuring proper handling and mitigation of financial and operational impacts. In an environment where margins for error are increasingly narrow, specialized support becomes essential to protect operations, reputation, and long-term business viability.
