VAT and IEPS certification in Mexico is the SAT-issued status that lets an IMMEX company claim a 100% tax credit on the value-added tax (IVA) and Special Tax on Production and Services (IEPS) that would otherwise be owed when temporarily importing goods for manufacturing, processing, or repair before export. It comes in three tiers, A, AA, and AAA, with progressively longer validity periods and greater administrative flexibility. The framework sits in the General Rules of Foreign Trade (RGCE) that SAT publishes each year.
Baseline Eligibility Before You Apply
The certification is not a standalone permit. You need a valid IMMEX program authorization from the Ministry of Economy first, because IMMEX is what grants temporary import privileges in the first place; without it, SAT will not process a certification application.1Gobierno de México. Industry Your RFC (tax ID) must be active, and every industrial facility and warehouse you operate has to be listed in the RFC record so SAT can confirm where imported goods are physically located.
SAT also requires a positive tax compliance opinion under Article 32-D of the Federal Tax Code. That opinion confirms the company is registered with an active RFC, current on required filings, free of outstanding tax debts (unless under an approved payment plan or legally contested with proper guarantees), free of final criminal tax convictions, and absent from SAT’s registry of companies issuing fictitious invoices.2Servicio de Administración Tributaria. Obtén tu Opinión del Cumplimiento de Obligaciones Fiscales The legal representative needs a valid advanced electronic signature (e.firma), which is the binding digital signature for everything filed with SAT and the customs portal.
Employees must be registered with the Mexican Social Security Institute (IMSS), and recent IMSS contribution records are checked during review. Any gap in these foundational items produces an automatic denial, so an internal compliance audit before filing is standard practice.
The Three Tiers Compared
The RGCE sets three levels based on how long the company has run under IMMEX, its workforce size, and its capital investment in Mexico. Each tier carries a different validity period.
Tier A
Tier A is the entry level. You need at least one year of IMMEX operations, a minimum of ten employees registered with IMSS, and proof of investment in Mexico. Certification lasts one year, which means the full renewal process comes around annually. Most first-time applicants start here, and it delivers the core benefit: the 100% credit against IVA and IEPS on temporary imports.3Gobierno de México – SAT. Reglas Generales de Comercio Exterior para 2026
Tier AA
Tier AA is for companies with more operating history or greater scale. It requires at least four years operating under IMMEX, or qualification through workforce (over 1,000 employees) or investment volume (at least MXN 50 million in machinery and equipment). Certification is valid for two years, cutting the renewal burden in half. SAT treats AA-certified companies with more procedural trust, which tends to mean faster resolution of customs issues and more efficient VAT refund processing.3Gobierno de México – SAT. Reglas Generales de Comercio Exterior para 2026
Tier AAA
Tier AAA is the top level and comes with a three-year validity period plus priority access to various trade facilitation programs. You qualify with at least seven years of IMMEX operations, a workforce above 5,500 employees, or investment in machinery and equipment above MXN 100 million. Companies at this level have typically cleared multiple certification cycles without compliance incidents, and SAT grants them a degree of operational latitude that smaller or newer companies cannot access.3Gobierno de México – SAT. Reglas Generales de Comercio Exterior para 2026
Export Return Ratios Apply to Every Tier
Whatever tier you hold, the company has to maintain export return ratios: at least 60% for goods classified as sensitive and 80% for all other temporarily imported materials. Falling below these thresholds puts the certification at risk regardless of tier.
Documentation SAT Expects
Preparing the application file is where most of the real work happens. SAT wants documentation that proves both the physical reality and the financial substance of the manufacturing operation. The core items are:
- A production process description explaining how raw materials become finished goods, supported by an inventory of machinery and equipment at the facility.
- Legal occupancy proof: property titles or lease agreements covering at least one year for every facility and warehouse listed in the RFC.
- Supplier and customer lists with names and RFCs for principal trading partners on both sides.
- Financial statements and investment records showing fixed-asset investment levels that match the claimed tier.
- Recent IMSS contribution receipts confirming the registered workforce matches the tier requirement.
- Detailed product descriptions, including tariff classifications, for the goods being temporarily imported.
All data has to align precisely with what appears in the RFC and IMMEX registrations. Inconsistencies between submitted documents and official records are one of the most common reasons applications stall or get rejected. SAT’s digital system enforces specific file formats, so organizing documents in advance saves time during upload.
Filing Through VUCEM and the Site Visit
Applications go through the Ventanilla Digital Mexicana de Comercio Exterior (VUCEM), the single electronic entry point for import, export, and transit procedures in Mexico.4Ventanilla Única de Comercio Exterior Mexicano. Ventanilla Única de Comercio Exterior Mexicano The legal representative logs in with the company’s e.firma, opens the IVA and IEPS certification section, populates each field from the documentation package, and applies the final electronic signature to submit.
Once submitted, SAT has a review period of up to 60 business days. During that window, SAT may schedule a physical inspection of the premises, called a visita domiciliaria. Inspectors verify that the machinery exists, that the registered workforce is present, and that the facility matches what the application described. The visit must be initiated with an official written order, and the company receives a formal acta de inicio de visita at the start. Cooperative, immediate access to the premises and to requested documentation is the single most important factor in getting through this stage cleanly.
Annex 24 and Annex 31 Inventory Control
Keeping certification requires strict management of two interconnected inventory tracking systems, and this is where certifications are most often lost.
Annex 24 is the general inventory control system for customs purposes. It tracks the entry and exit of all temporarily imported goods. Companies must submit required information within 48 hours of importing goods and provide Mexican customs with online access to the inventory control system for verification.5International Trade Administration. Mexico Customs Inventory Control Update Missing those deadlines or failing to provide system access can trigger penalties or delays in customs clearance.
Annex 31 is the companion system that monitors the balances of VAT credits applied to temporary imports. It operates on a first-in, first-out basis, linked to the tariff codes declared for raw materials. A temporary import records a credit; the corresponding export records a debit. Companies transmit a detailed deployment report monthly or bimonthly, which is a substantial administrative load but non-negotiable.
The real danger with Annex 31 is falling into “non-valid” status. If the system shows unresolved discrepancies, such as unidentified tariff codes or missing open balances, SAT may suspend the VAT certification benefit. Best practice is frequent reconciliation between Annex 31 credit tracking and Annex 24 inventory records, down to physical inventory counts when necessary. The legal temporality for temporarily imported goods has also been shortened from the original 36 months to 18 or six months depending on the goods, so timely export and accurate tracking matter more than they did before.
Reporting Changes and Renewing
Certified companies have to notify SAT of changes quickly. Changes to corporate name, fiscal address, or operational facilities must be filed within five business days. That covers opening a new warehouse, relocating, or any modification to the RFC record. Updates to shareholder composition or board of directors also require formal notification, and even changes to the list of principal suppliers or customers should be documented.
Renewal has to be filed within a 30-day window before the certification expires. The renewal essentially mirrors the initial application: the company demonstrates it still meets all tier requirements, that its inventory systems are current and reconciled, and that no compliance gaps have opened up. Let the certification lapse and the tax credit ends immediately, and the company has to go through the full application process from scratch, including the SAT review period.
What Cancellation Costs
SAT can suspend or cancel the certification for inaccurate Annex 24 or Annex 31 records, falling below export return ratios, late reporting of corporate changes, or tax discrepancies found during an audit. After a cancellation, the company must wait two years before reapplying.
Cancellation also triggers immediate assessment of previously credited IVA and IEPS amounts. The company owes the taxes it had been deferring, plus applicable surcharges and potential penalties. For operations processing high volumes of temporary imports, that arrives as a serious liquidity hit with little warning, which is why companies that keep this certification long-term treat the inventory reporting systems as daily operational priorities rather than periodic paperwork.