Mexico’s May 2026 Transfer Pricing Deadline Is Approaching. Is Your Organization Ready?

May 15th, 2026 marks a critical deadline for multinational enterprises with operations in Mexico: The Local File informative return covering fiscal year 2025 must be submitted to Mexico’s Tax Administration Service (SAT — Servicio de Administración Tributaria). With the SAT ramping up enforcement activity and deploying increasingly sophisticated audit tools, now is the time to ensure your transfer pricing documentation is airtight, accurate, and submitted on schedule. 

The Foundation: Mexico’s Transfer Pricing Framework 

Mexico’s transfer pricing (TP) regime is among the most comprehensive in Latin America. It is grounded in the arm’s length principle — the requirement that transactions between related parties reflect prices and conditions equivalent to those agreed upon between independent parties under comparable circumstances. This standard is codified in Articles 179 and 180 of Mexico’s Income Tax Law (LISR, or Ley del Impuesto Sobre la Renta), and enforcement responsibility lies with the SAT. 

The regulatory framework derives primarily from Articles 76, 76-A, 179, and 180 of the LISR, as well as the Federal Tax Code (CFF) and the current Miscellaneous Tax Resolution (RMF). Mexico’s rules closely follow OECD guidelines and have adopted the three-tiered documentation approach introduced under the OECD’s BEPS (Base Erosion and Profit Shifting) Action 13 initiative. This approach consists of a Local File, Master File, and Country-by-Country Report (CbCR). 

Under Mexico’s self-assessment regime, the burden of proof rests with the taxpayer. Companies must proactively document and demonstrate that their intercompany transactions are consistent with the arm’s length standard — before the SAT ever asks. 

Key Filing Obligations and Deadlines for Fiscal Year 2025 

Companies operating in Mexico face a layered set of transfer pricing obligations. The scope of those obligations depends on the size and structure of the enterprise. Here is a breakdown of the key requirements and their deadlines for the 2025 fiscal year: 

1. Transfer Pricing Study (Annex 9 of DIM) — Deadline: May 15, 2026 

Any company that had taxable income of at least MXN $13,000,000 (or MXN $3,000,000 for professional services firms) in fiscal year 2025 and engaged in related-party transactions must prepare a transfer pricing study. This study demonstrates compliance with the arm’s length principle and must be filed using the Multiple Information Return (DIM), Annex 9, by May 15, 2026. 

2. Local File — Deadline: May 15, 2026 

Entities that reported cumulative income exceeding MXN $1,940,100,000 (approx. $97 million USD) in fiscal year 2025, or those that are permanent establishments of a foreign entity, must prepare and submit a Local File. The Local File provides granular detail on the intercompany transactions of the Mexican entity, including the pricing methodology applied, and is considered one of the SAT’s most important tools for assessing TP risk. It must be prepared in Spanish and filed by May 15, 2026. This is widely regarded as the most pressing upcoming deadline for multinational groups operating in Mexico. 

3. Master File — Deadline: December 31, 2026 

Entities that are part of a Multinational Group and meet the income threshold are required to prepare a Master File, which provides a high-level overview of the group’s global operations, organizational structure, transfer pricing policies, and intercompany financial arrangements. The Master File may be submitted in either Spanish or English, and the deadline for filing the 2025 fiscal year Master File is December 31, 2026. 

4. Country-by-Country Report (CbCR) — Deadline: December 31, 2026 

The CbCR applies to parent companies of Mexican multinational groups with consolidated group income exceeding MXN $16,590,975,000 (approximately $900 million USD) in the prior fiscal year. This report provides jurisdiction-by-jurisdiction financial and tax data, including revenue, pre-tax profits, taxes paid, and employee headcount. The CbCR for fiscal year 2025 must be filed by December 31, 2026. 

Special Rules for Maquiladoras 

Beginning with fiscal year 2025, maquiladora companies in Mexico are required to apply the safe harbor method as mandated by Article 182 of the LISR. Under this method, taxable profit is calculated as the greater of either 6.5% of the total costs and expenses associated with the maquiladora operation, or 6.9% of the total value of the assets utilized. These assets include machinery and inventories supplied by the foreign parent company.  

A major change for maquiladoras is the elimination of the Advance Pricing Agreement (APA) option. While APAs were available through fiscal year 2024, they are no longer offered from 2025 onward. This shift increases the importance of maintaining strong internal documentation and ensuring strict compliance with the required methods for this sector.  

It is important to note, however, that while Unilateral APAs were removed as part of the 2022 reform, Bilateral APAs (BAPAs) remain an available legal alternative to the mandatory safe harbor method. Through a BAPA, multinational enterprises can negotiate an agreement between Mexico’s SAT and a foreign tax authority, such as the IRS, allowing them to depart from the fixed 6.5% or 6.9% profit margins established by the safe harbor rule. SAT’s Intensifying Enforcement: The Stakes Have Never Been Higher 

Compliance with Mexico’s transfer pricing rules is not merely a formality — the consequences of non-compliance are significant and growing. The SAT reported a 367% increase in revenue collected from multinational audit enforcement between 2019 and 2024, rising from roughly $1.5 billion USD in the prior six-year period to approximately $5.5 billion USD. Industries under the most intensive scrutiny include automotive, mining, electronics, and telecommunications. 

For 2026, the SAT has published new audit selection criteria identifying the highest-risk taxpayer profiles. Red flags include recurring tax losses (particularly for subsidiaries with limited-risk profiles), transactions involving tax havens, inconsistencies between purchases, imports and sales, and effective tax rates below the sector norm. The SAT plans to audit 16,200 taxpayers in 2026, including 1,200 large taxpayers. 

Failure to comply with transfer pricing obligations can result in severe financial penalties. Under the Federal Tax Code, fines for failing to file information returns range from MXN $99,590 to $199,190. Penalties for incomplete or incorrect BEPS reports range from MXN $199,630 to $284,220. In cases where the SAT makes a tax adjustment, penalties can reach 55% to 75% of the omitted tax amount. Beyond financial penalties, non-compliance can trigger disallowance of deductions for related-party expenses — a potentially devastating outcome — and reversal of the burden of proof, placing the taxpayer in a far more difficult position in any audit dispute. 

High-Risk Transactions That Attract SAT Scrutiny 

Certain transaction structures consistently attract heightened attention from the SAT: 

• Limited-risk distributor and contract services arrangements 

• Maquiladora operations (particularly following the safe harbour mandate in 2025) 

• Business restructurings or changes in the transfer pricing model 

• Transactions involving intellectual property or hard-to-value intangibles (subject to exhaustive DEMPE analysis) 

• Persistent losses in any entity 

• Transactions with related parties resident in low-tax jurisdictions 

• Shared services arrangements (which must be supported by documentation per Rule 3.3.1.27 of the RMF) 

How Exactera Helps You Stay Ahead of Mexico’s Transfer Pricing Requirements 

Navigating Mexico’s layered transfer pricing requirements — with multiple deadlines, different thresholds, and the ever-present risk of SAT scrutiny — is a complex undertaking. That complexity is multiplied for multinationals managing documentation across multiple jurisdictions simultaneously.  

Exactera combines the expertise of seasoned transfer pricing professionals with award-winning technology to help multinational enterprises and their advisors meet Mexico’s requirements — and those of every other jurisdiction where they operate — with confidence and efficiency. 

Ready to streamline your Mexico transfer pricing compliance? Speak to an Exactera expert today. 

This content is provided for informational purposes only and does not constitute legal, tax, or accounting advice. The information contained herein reflects general guidance based on laws and regulations in effect as of the publication date and is subject to change. Exactera does not warrant the completeness or accuracy of this content, and it should not be relied upon as a substitute for professional advice tailored to your organization’s specific facts and circumstances. Please consult a qualified tax advisor before making any decisions based on the information presented.