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U.S. Chamber Challenges Mexico’s Tax Enforcement in USMCA Filing as Sheinbaum Defends SAT

The filing seeks urgent scrutiny ahead of the 2026 USMCA review.

Overview

  • The U.S. Chamber of Commerce submitted comments to the U.S. Trade Representative alleging that Mexico’s tax authority uses aggressive, opaque practices that harm American companies.
  • The filing cites excessive audits with unreasonable response times, shifting interpretations, disproportionate document demands, denial of intercompany deductions, and retroactive penalties.
  • The Chamber highlights sector impacts, alleging double VAT charges on maquiladoras and a retroactive interpretation that blocks insurers from claiming VAT credits on indemnity payments.
  • The submission argues these actions undermine USMCA principles of non-discrimination, predictability, and transparency and flags judicial and institutional changes in Mexico that erode legal certainty.
  • President Claudia Sheinbaum defended the SAT’s transparency and said new audit guidelines were published this week to clarify procedures.