Mexico Tariff Lookup: TIGIE Rates, NOMs, and NICOs

Mexico tariff lookup resources are available online, but identifying a TIGIE fraction is only the beginning. Importers must connect classification, base duty rates, NICOs, NOMs, origin rules, permits, and current tariff modifications before calculating the actual cost and compliance requirements for bringing goods into Mexico.

Where to Find Mexico Tariff Numbers and Base Rates

Mexico's tariff schedule is published through the Tarifa de la Ley de los Impuestos Generales de Importación y de Exportación, commonly called the TIGIE. It provides the legal framework for classifying imports and exports, identifying general import tax rates, and connecting products with applicable commercial requirements.

Unlike a static tariff book, Mexico's online trade information is distributed across government systems and official publications. Compliance teams therefore need a defined research process rather than relying on a single search result or downloaded tariff file.

Using SNICE for Tariff Research

The Servicio Nacional de Información de Comercio Exterior, or SNICE, is generally the primary starting point for Mexico tariff classification research. Its tools support searches by product description, chapter, heading, subheading, 8-digit tariff fraction, and NICO.

SNICE also maintains information concerning tariff modifications and non-tariff regulations. Depending on the product, the results may identify permits, notices, labeling requirements, quotas, and Normas Oficiales Mexicanas, or NOMs. These connections make the system particularly important for import planning because a favorable duty rate does not eliminate the need to satisfy regulatory controls.

Using SIAVI to Validate Rates and Trade Measures

The Sistema de Información Arancelaria Vía Internet, or SIAVI, offers another official channel for reviewing tariff information. It is useful for validating TIGIE rates, product descriptions, trade agreement treatment, and certain import or export measures.

SNICE and SIAVI should generally be used together. One system may present classification and regulatory details more clearly, while the other may help confirm the tariff treatment or commercial context.

Building a Defensible Lookup Record

A reliable research file should capture the tariff fraction, NICO, product description, general IGI rate, country of origin, preferential rate, NOMs, permits, effective date, and the date of the lookup. Screenshots or downloaded results can support internal review, but teams should still verify important changes against the Diario Oficial de la Federación, Mexico's official publication channel.

How Mexico Tariff Classification Works

Mexico follows the international Harmonized System through the first six digits of classification. The TIGIE extends that structure to an 8-digit Mexican tariff fraction, and an additional 2-digit Número de Identificación Comercial, or NICO, provides more detailed commercial identification.

A classification used in the United States or Canada can be a useful comparison point, but it should not be copied automatically into a Mexican import declaration. National tariff extensions, explanatory practices, product descriptions, and regulatory links can differ even when the first six digits appear similar.

From HS Code to TIGIE Fraction and NICO

The classification process should begin with the product's objective characteristics. Relevant facts commonly include material composition, principal function, method of operation, dimensions, degree of processing, and intended use when the tariff language makes use relevant.

The reviewer should first identify the likely chapter and heading, then evaluate the subheading, 8-digit TIGIE fraction, and applicable NICO. Supporting materials may include technical specifications, photographs, bills of materials, ingredient lists, engineering drawings, catalogs, and manufacturing descriptions.

A text search alone is rarely sufficient. Similar commercial descriptions can fall under different provisions because of material, function, or construction. Conversely, a tariff description may use technical terminology that does not appear on an invoice or product catalog.

Why the Base IGI Rate Is Not the Final Cost

The Impuesto General de Importación, or IGI, is Mexico's general import duty. The TIGIE base rate typically reflects most-favored-nation treatment, but the rate actually applied can depend on origin, trade agreement eligibility, sector-specific programs, quotas, exemptions, and temporary measures.

Import cost may also include value-added tax, customs processing charges, excise tax for certain products, antidumping duties, and other assessments. The customs value and applicable valuation method must therefore be reviewed separately from classification.

Connecting Classification to NOM Requirements

NOMs can establish labeling, safety, energy efficiency, health, testing, certification, or product information requirements. Their application is often tied directly to the tariff fraction and may vary by product condition or intended use.

Compliance teams should determine whether a NOM applies at the point of entry, whether an exception is available, and what documentation must be presented. Discovering a NOM requirement after shipment can result in delays, storage costs, relabeling, or an inability to complete clearance.

Managing Mexico's 2026 Tariff and Permit Changes

Tariff data is time-sensitive. Mexico can modify IGI rates, create temporary exemptions, impose permit requirements, or change the products covered by non-tariff regulations. A classification decision that was financially accurate when a purchase order was issued may no longer produce the same result when the goods arrive.

The effective date matters as much as the published rate. Importers should distinguish between the date a measure is announced, the date it is published, and the date it becomes applicable to customs transactions.

Higher Rates for Goods From Non-FTA Countries

Mexico's 2026 TIGIE reforms increased general IGI rates on 1,463 tariff fractions for products from countries without an applicable free trade agreement. The revised rates, generally ranging from 5%-50%, took effect on January 1, 2026. A further 185 fractions were affected from April 24, 2026, with rates generally ranging from 5%-35%.

The changes affect commercially significant categories such as textiles, steel, automotive parts, plastics, cosmetics, and other manufactured products. Importers sourcing from Asia and other non-FTA markets should review both tariff classification and origin before accepting a landed-cost estimate. Transshipment through an FTA country generally does not create preferential origin.

Automotive Treatment Under Fraction 9803.00.01

A temporary measure effective October 14, 2026, changed the IGI rate for TIGIE fraction 9803.00.01 from 10% to exempt for five years. The provision covers qualifying parts and components used in automobile assembly by authorized terminal industry companies operating under the fiscal deposit regime.

The exemption is not simply a classification-based zero rate. Eligible use generally requires a prior import permit and satisfaction of the program's operational conditions. Importers should confirm authorization, permit status, product eligibility, and effective dates before declaring exempt treatment.

Controls for Keeping Rate Data Current

A mature tariff maintenance process should include:

• Monitoring TIGIE modifications and foreign trade rule changes.
• Rechecking rates before purchase commitments and shipment.
• Separating general rates from preferential rates.
• Confirming permits, NOMs, quotas, and trade remedies.
• Recording the effective date used for each landed-cost calculation.
• Escalating high-value or ambiguous classifications for specialist review.

These controls reduce the risk that outdated tariff data will flow into sourcing decisions, broker instructions, or customer pricing.

Frequently Asked Questions

Is Mexico's Tariff Schedule Available Online?

Yes. Mexico provides online access to TIGIE classification and tariff information through government systems including SNICE and SIAVI. Users can generally search by tariff fraction, NICO, chapter, heading, or product description. Important tariff modifications and effective dates should also be checked in the Diario Oficial de la Federación.

What Is the Difference Between an HS Code, TIGIE Fraction, and NICO?

The HS code usually refers to the internationally harmonized first six digits. Mexico extends that code to an 8-digit TIGIE tariff fraction for national classification. A 2-digit NICO adds commercial identification, producing a 10-digit reference for more detailed reporting without replacing the underlying tariff fraction.

Does the TIGIE Base Rate Equal the Total Import Cost?

No. The base IGI rate is only one component of the import calculation. Preferential origin, customs value, value-added tax, processing charges, excise taxes, antidumping duties, quotas, exemptions, and sector programs may affect the final amount. Compliance costs associated with NOM certification or permits may also be significant.

How Do NOMs Affect Imports Into Mexico?

NOMs can impose product safety, labeling, testing, certification, energy efficiency, health, or consumer information requirements. Applicability is often connected to the tariff fraction. Depending on the measure, compliance may need to be demonstrated before importation, at customs clearance, or before the product is sold in Mexico.

Can a U.S. or Canadian Tariff Number Be Used in Mexico?

Not automatically. The first six digits may align because all three countries use the Harmonized System, but national extensions and interpretations can differ. Importers should independently determine the Mexican 8-digit fraction and NICO, then verify the associated IGI rate, NOMs, permits, and preferential origin rules.

How Often Should Mexico Tariff Data Be Reviewed?

Tariff data should generally be reviewed when a product is introduced, its specifications change, the supplier or origin changes, or a new shipment is planned after a regulatory update. High-volume importers may also benefit from scheduled reviews of classifications, rates, permits, and NOM requirements across their product master data.

How Stable Software Can Help

Supporting Better Duty and Landed-Cost Decisions

Accurate classification and current tariff data provide the foundation for credible sourcing and landed-cost analysis. Trade teams comparing duty exposure across markets can explore Stable Software's tariff calculator as part of that planning process.

Stable Software also makes DrawbackAI for U.S. customs brokers managing duty drawback programs. Brokers can white-label the software for importer clients, file claims under their own filer code, and retain control of the client relationship. Stable Software charges a flat software license and never takes a percentage of the refund. For brokers supporting importers with cross-border supply chains, disciplined tariff analysis and structured drawback operations can help turn duty data into more informed commercial decisions.

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