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IMMEX is not a tax break, it is a duty deferral you have to keep earning. The five modalidades, the IVA trap, and what the 2026 reform changed.

Anexo 24 is not a report your broker files. It is the live inventory control system that decides whether your IMMEX survives a SAT audit. Here is how it works.

The pedimento is the record SAT audits against, and most operations read three of its fields. A field-by-field guide to reading all of them, and the five blocks where errors hide.

Section 232 has rewritten itself repeatedly since early 2025. A signed argument: classification and origin are infrastructure you maintain, not a one-time filing.

The TIPAT lane runs both ways. With the UK now a Party for Mexico, Mexican exporters gain preferential UK access. The opportunity and how to claim it.

Under the TIPAT, the certification is the claim and the origin file is the proof. How to qualify UK-origin goods and build a file that survives a SAT verification.

Under the TIPAT, the certificado de cupo is what unlocks the in-quota rate on dairy and palm oil. How the cupo works and how to secure the certificate.

The UK joined Mexico's CPTPP (TIPAT) on June 22, 2026. UK-origin goods can clear duty-free, but only with valid origin and, for dairy, a Secretaría de Economía cupo certificate.

More than 80% of Mexico's exports go to one country. The UK joining the TIPAT is a concrete lever to change that, for operations willing to do the work.

A Mexican tariff classification is eight digits, built in layers, each governed by a different rule. How to read the fracción arancelaria and the NICO, and why one digit moves your duty.

As of May 21, 2026, textiles and footwear (chapters 50 to 64) can no longer be destined to the Recinto Fiscalizado Estratégico. The four changes and what affected operations should do.

SAT's Second RGCE Resolution (advance version, June 4, 2026) changes three routine procedures: the NICO SEA suspension, depósito fiscal and almacén Cartas de Cupo, and certification verification. Who each hits.

From July 1, 2026, three cellphone fractions must demonstrate NOM-001-SCFI-2018 and NOM-024-SCFI-2013, including via courier. The change and the trap to close first.

Under the June 2026 Section 232 proclamation, USMCA qualification is the gap between a 15% floor on non-U.S. content and the full rate on full value. The CFO cost case.

Mexico's 2026 customs reform now requires your customs agency to hold certified-company registration to clear, conclude, or withdraw RFE cargo. Here is the gap most operators missed.

Should you register as a steel importer in Mexico? The RIPS annual shortcut, who it fits, and the 30-to-15-day renewal window that cancels registrations filed late.

A step-by-step playbook for filing an Aviso Automático in VUCEM: the data to assemble first, what the system validates, and the mistakes that cause delays.

What the SAT 69-B list is, why your Mexican customs broker must screen your suppliers against it in 2026, and what to do if a counterparty is listed.

Since the 2026 reform, a carta encomienda alone no longer protects you. Here's what a Mexican customs service contract must cover, and the questions CFOs should ask.

As of June 22, 2026, UK goods enter Mexico under the TIPAT, not the post-Brexit continuity agreement. What changed in origin rules, certification, and duty math.

The USMCA Joint Review opens July 1, 2026. Three rules-of-origin shifts now in play decide whether your goods keep duty-free entry or meet new tariffs.

A step-by-step playbook to build your Mexican customs broker KYC file before cargo ships, so an incomplete file never holds your first import.

In 2026, the documents your Mexican customs broker keeps requesting aren't bureaucracy, they're shared protection. A compliance leader explains why.

Steel and aluminum Avisos Automáticos compared on fracciones, chapters, origin data, dates, and the steel-only registry: what dual-material importers must not blur.

The NICO is the last two digits of a Mexican tariff classification. It does not change your duty, but it decides how legible your declaration is to the authority.

Mexico's 2026 customs reform makes your broker jointly liable for your compliance. What changed, why it lands on you, and what to do now.

A repeatable method for reading any Mexican NOM change from primary sources, the four questions that tell you whether it touches you, when, and what to do.

Your Incoterm decides your Mexican customs value, and the mandatory MVE now makes you prove every figure. How it works, with examples and the legal exposure.

Mexico's aluminum aviso demands smelting-and-casting origin on every import. The reason isn't statistics, it's anti-triangulation. A Joffroy compliance read.

Since 2026, your Mexican customs broker must keep a KYC file on you under Regla 1.4.14. Here's what's in it and why it's mandatory.

Landed cost calculation broken down: the 9 line items most CFOs miss when comparing customs quotes, and how each one quietly erodes 1-3% of margin per shipment.

On June 1, 2026, UIF and ANAM signed an information-sharing agreement. What it says, what it means for importers, and what to reconcile first.

Effective June 8, 2026, USMCA steel derivatives credit U.S. content at 0% — but only up to 40% of value. The rest pays 25%. What changed and what to verify this week.

A June 3, 2026 Executive Order redefines who can be an Importer of Record into the U.S. The five changes foreign IORs and Trade Directors must read now.

As of Jan 1, 2026, Regla 3.7.20 removed domicilio fiscal retention for NOM failures. What the lost buffer costs importers — and the compliance posture that protects clearance.

As of May 25, 2026, aluminum imports need an Aviso Automático number on the pedimento. What Regla 2.2.26 BIS changed and what to verify this week.

As of June 1, 2026, Mexico's Manifestación de Valor Electrónica is mandatory and signed with the importer's e.firma — not the broker's. What changed and what to verify this week.

What an Aviso Automático de Importación really is, why "automático" doesn't mean instant or optional, and how the steel (Regla 2.2.26) and aluminum (Regla 2.2.26 BIS) regimes differ for Mexican importers.

Mexico's Reforma Aduanera 2025 enters into force on January 1, 2026 and rewrites the documentation, liability, and supervision rules of cross-border trade. Here's the context, the objectives, and what it means for your operation.

USMCA Round 2 opens May 25 with 52 US demands on the table. Four of them will reshape rules of origin, steel, labor, and digital trade. Here's what to do.