Brazil — Tariff Classification

Brazil administers tariff classification through the Nomenclatura Comum do Mercosul (NCM, MERCOSUR Common Nomenclature), an eight-digit coding system that extends the six-digit Harmonized System (HS) maintained by the World Customs Organization with two additional MERCOSUR-specific digits. The NCM is the sole classification schedule used for import and export declarations in Brazil and for assessing the Imposto de Importação (II, Import Duty), the Imposto sobre Produtos Industrializados (IPI, Excise Tax on Industrialized Products), and state-level value-added taxes.

Legislative basis. Decree 2,376 of 12 November 1997 formally adopted the NCM in Brazil and established the framework for updates to align with HS amendments and MERCOSUR decisions. The NCM is derived from the HS Convention; its first six digits follow the international HS structure by treaty obligation, and the seventh and eighth digits are defined collectively by the four MERCOSUR member states (Argentina, Brazil, Paraguay, and Uruguay). The NCM contains approximately 10,000 eight-digit codes organized into 21 Sections and 96 Chapters, following the HS progression from live animals and raw materials through to finished goods and works of art.

Administering authority. The Secretaria da Receita Federal do Brasil (RFB, Brazilian Federal Revenue Service), a division of the Ministry of Finance, administers customs classification and enforces the NCM on import and export declarations filed through the SISCOMEX integrated foreign-trade system. RFB issues binding classification rulings on request and conducts post-entry audits to verify merchandise classification. Classification errors discovered during clearance or audit trigger penalties: Decree 6,759/2009 (the Customs Regulation) imposes a minimum fine of 1% of the customs value (floor R$500) for incorrect NCM declarations even when no duty differential results, and a 75% penalty on any underpaid duty arising from misclassification (150% if fraud is established).

MERCOSUR coordination. Changes to the NCM nomenclature or to the Tarifa Externa Comum (TEC, Common External Tariff) require approval by all four MERCOSUR member states through the Comitê Técnico Nº 1 – Tarifas, Nomenclatura e Classificação de Mercadorias (CT-1). Proposals approved by CT-1 advance to the Comissão de Comércio do MERCOSUL (CCM) and the Grupo Mercado Comum (GMC) for final decision; once adopted by GMC resolution, Brazil internalizes the measure through a resolution of the Comitê-Executivo de Gestão da Câmara de Comércio Exterior (GECEX, Executive Management Committee of the Foreign Trade Chamber). GECEX resolutions are the instrument that gives NCM changes and TEC tariff modifications binding legal effect in Brazil. As of 2022, the NCM in force is based on the seventh amendment of the HS (HS 2022), adopted by MERCOSUR GMC Resolution and published in Brazil by CAMEX Resolution 272/2021.

Interpretative framework. The NCM incorporates the six General Rules for the Interpretation of the Harmonized System (GRI 1–6) established by the HS Convention, plus supplementary MERCOSUR-specific General Complementary Rules. Classification proceeds sequentially: GRI 1 (classification by heading text and Section/Chapter notes) controls unless the heading text is incomplete; GRI 2 extends headings to incomplete or unfinished articles and mixtures; GRI 3 resolves competing headings by specific description (GRI 3(a)), essential character (GRI 3(b)), or last-classified numerical heading (GRI 3(c)); GRI 4 assigns goods not classified by GRI 1–3 to the heading for the most similar article; GRI 5 governs packing; and GRI 6 applies GRI 1–5 at the subheading and item levels. RFB and Brazilian courts rely on the HS Explanatory Notes and on WCO classification opinions when interpreting NCM positions, though these instruments are persuasive rather than binding under Brazilian law.

Binding rulings. Law 9,430/1996 and Normative Instruction RFB 2,057/2021 authorize importers and exporters to request formal classification rulings (consultas) from RFB on specific merchandise. A granted ruling binds RFB for the taxpayer and the described merchandise until the NCM is amended or RFB formally revokes the ruling; the consultation process suspends the statute of limitations for the petitioner. Rulings are not published as precedent, so different importers of identical goods may receive divergent rulings, and a CBP-style binding-ruling database searchable by third parties does not exist in Brazil.

Source: Decreto 2.376/1997 (adoption of NCM); Receita Federal: NCM; Decreto 6.759/2009 – Regulamento Aduaneiro; CAMEX: Alterações da NCM/TEC; CAMEX Resolução 272/2021 – NCM 2022

Classification of merchandise under the NCM proceeds by application of the six General Rules for the Interpretation of the Harmonized System (Regras Gerais para Interpretação do Sistema Harmonizado, GRI 1–6), incorporated into Brazilian law through the Tabela de Incidência do IPI (TIPI) and enforced by RFB in all import and export declarations filed through SISCOMEX. The GRIs are mandatory and hierarchical: a classifier applies GRI 1 first; only if GRI 1 does not yield a single position does the classifier proceed to GRI 2, and so on. Misapplication of the GRI sequence—skipping GRI 1 to invoke GRI 3(b) essential character without first establishing that two headings are equally specific—constitutes an interpretive error that RFB may challenge on audit.

GRI 1 — Classification by heading text and notes. Classification is determined by the text of the headings and by the Section and Chapter notes; the titles of Sections, Chapters, and Subcapters have indicative value only. GRI 1 resolves the majority of classification questions. If the heading text and notes unambiguously describe the merchandise, classification stops at GRI 1; the remaining GRIs are subsidiary. For example, live bovine animals of heading 0102 are classified by GRI 1 without reference to further rules, because the heading text ("Live bovine animals") and the Chapter 1 notes establish the scope with precision.

GRI 2 — Incomplete or unfinished articles, and mixtures. GRI 2(a) provides that any reference to an article in a given heading covers the article even when incomplete or unfinished, provided it has—in the state presented—the essential characteristics of the complete or finished article. GRI 2(a) also covers articles presented disassembled or unassembled (knocked down). GRI 2(b) provides that any reference to a material includes that material whether pure or mixed or associated with other materials; classification of mixtures and composite goods proceeds under GRI 3 when GRI 2(b) brings multiple headings into consideration.

GRI 3 — Goods classifiable under two or more headings. When GRI 2(b) or any other reason causes merchandise to fall prima facie under two or more headings, classification proceeds in the following sequence:

• GRI 3(a) — Most specific heading. The heading that provides the most specific description prevails over a more general description. However, when two or more headings each refer to only part of the materials in a composite good or to only one component of a retail set, those headings are regarded as equally specific, even if one heading gives a more complete description. In that case, classification proceeds to GRI 3(b).

• GRI 3(b) — Essential character. Composite goods and retail sets are classified according to the material or component that imparts the essential character, if that determination can be made. Essential character may be determined by the nature of the material, its bulk, quantity, weight, value, or the role it plays in relation to the use of the goods. GRI 3(b) is the most frequently litigated GRI in Brazilian customs disputes, because determination of essential character involves factual judgment and importers and RFB auditors may reach opposite conclusions on identical merchandise. Brazilian federal courts (Conselho Administrativo de Recursos Fiscais, CARF, and Tribunal Regional Federal) have held that the importer bears the burden of substantiating the essential-character determination with technical documentation—catalog descriptions, engineering specifications, and industry-standard usage—when RFB challenges the declared NCM code on essential-character grounds.

• GRI 3(c) — Last in numerical order. When neither GRI 3(a) nor GRI 3(b) resolves the classification, the merchandise is classified in the heading that occurs last in numerical order among those that merit equal consideration. GRI 3(c) is a tiebreaker of last resort and is rarely invoked in practice, because most composite goods can be resolved by essential character under GRI 3(b).

GRI 4 — Goods not classifiable by GRI 1–3. Merchandise that cannot be classified by application of GRI 1 through GRI 3 is classified in the heading for goods to which it is most akin. GRI 4 is rarely applied in Brazil, because the NCM contains approximately 10,000 eight-digit codes and the HS Convention's structure anticipates nearly all categories of merchandise.

GRI 5 — Packing materials and containers. GRI 5(a) governs camera cases, instrument cases, and similar containers specially shaped or fitted to contain a specific article: when suitable for long-term use and presented with the article, the container is classified with the article if of a kind normally sold therewith; otherwise the container is classified separately. GRI 5(b) governs packing materials and containers presented with the goods: subject to GRI 5(a), such materials and containers are classified with the goods if of a kind normally used for packing such goods; otherwise they follow their own classification. The two Regional Complementary Rules (Regras Gerais Complementares, RGC) published in the TIPI extend GRI 5(b): reusable packaging under temporary-admission or temporary-export regimes follows its own classification, but in all other cases packaging follows the classification of the merchandise.

GRI 6 — Classification at the subheading and item levels. GRI 6 provides that classification of goods in the subheadings of a heading, and in the items and subitems of the NCM regional desdobramentos (seventh and eighth digits), is determined by the texts of those subheadings, items, and subitems and by any Subheading Notes, applying GRI 1 through GRI 5 mutatis mutandis, with the understanding that only subdivisions at the same level are comparable. In other words, once a four-digit heading is determined under GRI 1–5, the classifier applies the same sequential logic to choose among competing six-digit subheadings, then among competing eight-digit NCM codes, at each stage comparing only codes of the same hierarchical level.

Precedential value of WCO instruments. Although the HS Explanatory Notes (Notas Explicativas do Sistema Harmonizado, NESH) published by the World Customs Organization and WCO classification opinions are not legally binding in Brazil, RFB and Brazilian courts routinely cite them as persuasive authority when interpreting the scope of NCM headings and the application of the GRIs. Importers filing binding-ruling requests (consultas) under Normative Instruction RFB 2,057/2021 are advised to attach relevant excerpts from the NESH and WCO opinions to support the proposed classification.

Source: TIPI 2022 – Regras Gerais para Interpretação do Sistema Harmonizado; Decreto 6.759/2009 – Regulamento Aduaneiro; RFB: NCM

Brazilian importers and exporters may request a binding tariff classification ruling—formally termed a consulta sobre classificação fiscal de mercadorias—from the Secretaria da Receita Federal do Brasil (RFB). A granted ruling binds RFB to apply the stated NCM code to the described merchandise for all future imports or exports by the petitioning company until the NCM nomenclature is amended or RFB formally revokes the ruling. The ruling does not bind the petitioner and does not prevent RFB from auditing or challenging the classification of merchandise that differs from the sample or description submitted.

Statutory framework and administering office. The consulta procedure is governed by Normative Instruction RFB 2,057 of 9 December 2021, which implements the general consultation provisions in Law 9,430/1996 and Decree 70,235/1972 (the Administrative Process Regulation) for classification matters. The Coordenação-Geral de Tributação (Cosit, General Coordination of Taxation) within RFB's headquarters in Brasília issues all classification rulings; Regional Superintendencies have no decision-making authority in classification matters.

Who may file. Any individual or legal entity subject to Brazilian customs jurisdiction may file a consulta. Trade associations (entidades representativas de categoria econômica ou profissional) may file on behalf of their members, but a ruling in favor of an association binds RFB only toward members who expressly adhered to the petition. Foreign companies planning to export to Brazil or foreign investors establishing an importing subsidiary in Brazil may file before registering in the National Cadastre of Legal Entities (CNPJ), but must designate a Brazil-domiciled legal representative in the petition.

Filing procedure. The petitioner files a consulta electronically through the Centro de Atendimento Virtual da Receita Federal (e-CAC, RFB's Virtual Service Center) portal. The petitioner must open a digital process, select the service type "Consulta sobre Classificação Fiscal de Mercadorias," and upload (i) a completed consultation form (Anexo Único da IN RFB 2,057/2021); (ii) a detailed technical description of the merchandise, including composition, manufacturing process, dimensions, weight, intended use, and commercial catalog; (iii) photographs or diagrams of the merchandise; (iv) technical specifications, laboratory reports, or certificates of analysis when composition is material to classification; and (v) a physical sample of the merchandise or a sworn statement explaining why a sample cannot be provided. The e-CAC system allows three business days after opening the process to attach all documents; incomplete filings within that window are rejected as ineffective (IN RFB 2,057/2021, Arts. 8–9).

Petitioners are strongly advised to cite applicable Section and Chapter notes, the proposed NCM code, the GRI sequence applied, and relevant WCO Harmonized System Explanatory Notes (NESH) or WCO classification opinions. Although RFB is not bound by the petitioner's proposed classification, a well-researched submission reduces processing time and the risk of an unfavorable ruling.

Conditions of admissibility. RFB will declare a consulta ineffective—without issuing a substantive ruling—if: (a) the petitioner is under a pending audit or administrative proceeding relating to the same merchandise or tax issue; (b) the petitioner has been formally notified to pay duty on the same merchandise under a different classification; (c) the question was previously decided by RFB in a prior ruling for the same petitioner and the NCM has not been amended since that ruling; or (d) the petition is hypothetical or insufficiently specific to permit a definitive classification (IN RFB 2,057/2021, Art. 4; Decreto 70.235/1972, Art. 52). A declaration of inefficacy is not subject to administrative appeal (IN RFB 2,057/2021, Art. 35).

Suspension of limitation period and audit protection. Filing a consulta suspends the statute of limitations for RFB to assess customs duties and penalties on the described merchandise, starting on the date the petition is filed and continuing until 30 days after the petitioner receives notification of Cosit's decision (or, if the petitioner appeals an unfavorable first-instance decision, until 30 days after notification of the appellate decision). During this suspension period, RFB may not initiate an audit or penalty proceeding against the petitioner relating to the subject matter of the consulta—but the consulta does not suspend the obligation to file import or export declarations or to pay assessed duties (Decreto 70.235/1972, Art. 48–49). If the importer continues to import the merchandise during the pendency of the consulta, it must declare an NCM code and pay the corresponding duty on each entry; if the eventual ruling determines a higher duty rate applies, the importer must pay the deficiency with interest, but the protective effect of Article 48 shields the importer from penalties on entries made before the ruling was issued.

Decision and publication. Cosit's decision, termed a Solução de Consulta, is notified to the petitioner electronically via the e-CAC message inbox (IN RFB 2,057/2021, Art. 42). The full text of the ruling—redacted to remove the petitioner's identifying information—is published in the Diário Oficial da União (DOU) and on RFB's website in the Sistema Classif searchable database. Published rulings are persuasive authority but are not binding precedent for third parties; a different importer of identical merchandise may receive a divergent ruling.

Binding effect and duration. A Solução de Consulta binds RFB in favor of the petitioner from the date the consulta was filed (retroactive protection) until (i) the NCM nomenclature is amended by MERCOSUR decision and internalized by CAMEX resolution, changing the heading or subheading structure relevant to the ruling; (ii) Cosit formally revokes or modifies the ruling on its own initiative (de ofício), notifying the petitioner that the new classification applies prospectively from the date of notification (IN RFB 2,057/2021, Arts. 40–41); or (iii) RFB publishes a superseding normative act in the Diário Oficial da União, which modifies prior rulings automatically without individual notice (IN RFB 2,057/2021, Art. 48). If RFB revokes or amends a ruling unfavorably to the petitioner under Article 40, the new decision is binding only from the date the petitioner receives notice; RFB may not retroactively assess duty on imports made in reliance on the original ruling during the period it was in effect.

Administrative appeal. There is no formal administrative appeal from a Solução de Consulta issued by Cosit. If the petitioner disagrees with the classification, the sole remedies are (i) to file a new consulta after gathering additional technical documentation or evidence of a changed factual premise, or (ii) to import the merchandise under the petitioner's preferred classification and, if RFB challenges the entry on audit, litigate the correct classification in the administrative tax court (Conselho Administrativo de Recursos Fiscais, CARF) and ultimately in federal court.

Searchable database. RFB publishes all Soluções de Consulta—redacted to remove taxpayer names—on the Sistema Classif platform hosted on the Portal Único de Comércio Exterior (Pucomex). The Classif system offers a searchable database of published classification rulings, the full NCM nomenclature with historical versions since 1996, the text of the WCO Harmonized System Explanatory Notes, and MERCOSUR classification directives. Importers researching classification questions are encouraged to search the database before filing a consulta; submission of a question substantially identical to one already answered by a published ruling for similar merchandise may result in dismissal for lack of novelty.

Source: Instrução Normativa RFB 2.057/2021 (regulation of consulta procedure for classification); Serviço: Consulta sobre Classificação Fiscal de Mercadorias — Gov.br; Decreto 70.235/1972 (Consolidado) (administrative process regulation, Art. 48–49 suspension of limitation period); Sistema Classif — RFB

Brazil incorporates two categories of World Customs Organization (WCO) interpretive instruments into its tariff-classification framework: the Notas Explicativas do Sistema Harmonizado (NESH, Harmonized System Explanatory Notes) and the WCO Pareceres de Classificação (Classification Opinions issued by the WCO Harmonized System Committee). The two instruments have materially different legal weight in Brazil. WCO Classification Opinions, once internalized by RFB normative instruction, are binding on RFB and on all participants in Brazilian international trade. The NESH, by contrast, are persuasive but not binding—they constitute a "subsidiary element of fundamental character" for interpreting NCM headings and subheadings, but RFB and Brazilian courts may depart from them when the NCM text, Section/Chapter notes, or GRI logic supports a different result.

HS Explanatory Notes (NESH) — persuasive authority. The NESH are the official international commentary on the Harmonized System, published by the WCO in English and French and translated into Portuguese by RFB. Instrução Normativa RFB 2,169 of 29 December 2023 approved the current consolidated Portuguese text of the NESH, incorporating WCO amendments through mid-2023. The NESH provide explanations of the GRIs, Section notes, Chapter notes, and Subheading notes, establish the scope and content of each HS position and subposition, and contain technical descriptions of merchandise, lists of included and excluded articles, and practical guidance for classification. The NESH cover the first six digits of the NCM (the internationally harmonized HS structure); they do not address the seventh and eighth digits, which are MERCOSUR-specific and governed by MERCOSUR Ditames and Brazilian Notas Complementares.

Legal status of NESH in Brazil. Decreto 435 of 27 January 1992, which approved an earlier edition of the NESH, established that the NESH "constitute a subsidiary element of fundamental character for the correct interpretation of the content of positions and subpositions, as well as of the Section, Chapter, position, and subposition notes of the Harmonized System Nomenclature." This formula—subsidiary but fundamental—has been consistently reaffirmed by RFB and by Brazilian administrative tax courts (CARF, Conselho Administrativo de Recursos Fiscais). "Subsidiary" means that the NESH do not override the binding legal texts: the NCM code descriptions, the Section and Chapter notes (which are integral parts of the HS Convention under Article 1 of the HS Convention and Article 1 of Decree 97,409/1988, which promulgated the Convention in Brazil), and the GRIs. When the NCM text and notes are unambiguous, classification is governed by those texts under GRI 1, and reference to the NESH is unnecessary. When ambiguity exists—for example, when determining the scope of a heading, the meaning of a technical term, or the application of GRI 3(b) essential character—the NESH are the authoritative international interpretive guide and Brazilian classification authorities accord them heavy persuasive weight.

NESH in practice: consultas and CARF. Importers filing classification consultas under IN RFB 2,057/2021 routinely cite relevant NESH passages to support their proposed NCM codes, and RFB's Coordenação-Geral de Tributação (Cosit) regularly invokes the NESH in published Soluções de Consulta when explaining why a given article falls within or outside a particular heading. CARF decisions on classification disputes frequently cite the NESH as persuasive authority. However, both RFB and CARF have authority to depart from the NESH when the NCM legal text, Brazilian Notas Complementares, or MERCOSUR Ditames de Classificação point to a different classification, or when a party presents technical evidence showing that the merchandise differs materially from the NESH description. The NESH are an interpretive aid, not a regulation with force of law.

WCO Classification Opinions (Pareceres de Classificação) — binding authority. The WCO Harmonized System Committee (HSC) issues Classification Opinions that provide definitive international classification rulings for specific merchandise when HS Convention member states request harmonization of divergent national practices. These Opinions are adopted by the HSC and published in the official WCO Compendium of Classification Opinions. Under Article 8 of the HS Convention, Classification Opinions are binding on Contracting Parties that have not entered a reservation. Brazil has not reserved, and the Opinions become binding in Brazil upon internalization.

Internalization and binding effect in Brazil. Instrução Normativa RFB 2,171 of 2 January 2024 (published in the Diário Oficial da União on 10 January 2024) approved the Portuguese translation of the Compendium of WCO Classification Opinions approved through June 2023 and adopted the corresponding classification decisions. Article 1 of IN RFB 2,171/2024 provides that the Classification Opinions "possess binding character for the Secretaria da Receita Federal do Brasil (RFB) and for all other participants in international trade" ("possuem caráter vinculativo para a Secretaria da Receita Federal do Brasil (RFB) e para os demais intervenientes no comércio internacional"). This language is unambiguous: once an Opinion is internalized by RFB normative instruction, RFB may not classify the described merchandise in any heading other than the one specified in the Opinion, and importers and exporters are entitled to rely on the Opinion as binding authority. The binding effect applies only to merchandise that matches the factual description in the Opinion; merchandise with different composition, construction, or function is not governed by the Opinion even if superficially similar.

Searchable database and updating. Both the NESH and the WCO Classification Opinions are available in Portuguese translation on RFB's Sistema Classif platform, hosted on the Portal Único de Comércio Exterior (Pucomex). The Classif system allows keyword searches across the NESH and the Opinion Compendium and links each Opinion to the corresponding NCM code. RFB updates the Portuguese translations periodically as the WCO publishes new HSC session reports and amends the NESH. Practitioners researching classification questions should check the Classif database for applicable Opinions before filing a consulta or importing merchandise under a chosen NCM code; reliance on an internalized Opinion that matches the merchandise description provides the strongest available defense against an RFB classification challenge on audit.

Interaction with MERCOSUR Ditames. MERCOSUR member states (Brazil, Argentina, Paraguay, Uruguay) issue collective classification directives termed Ditames de Classificação do MERCOSUL, which address the seventh and eighth digits of the NCM and, occasionally, provide MERCOSUR-specific interpretation of the first six HS digits. MERCOSUR Ditames, once approved by the MERCOSUR Trade Commission (Comissão de Comércio do MERCOSUL, CCM) and internalized by GECEX resolution in Brazil, are binding on RFB for the four MERCOSUR member states. When a MERCOSUR Ditame and a WCO Classification Opinion address overlapping merchandise, the Ditame controls for the seventh and eighth NCM digits (which the WCO has no authority over), and the WCO Opinion controls for the first six digits unless the MERCOSUR members collectively adopt a divergent position permitted by an HS Convention reservation (rare in practice). If a conflict arises and cannot be resolved by reference to the respective scopes, RFB's position is governed by the instrument most recently internalized, but such conflicts are uncommon because MERCOSUR coordination on HS matters occurs through the WCO framework.

Practical guidance for importers and customs brokers. When researching an NCM classification, follow this hierarchy: (1) the NCM code text and Section/Chapter/Subheading notes (binding legal text); (2) applicable WCO Classification Opinions internalized by IN RFB (binding once internalized); (3) MERCOSUR Ditames internalized by GECEX resolution (binding for MERCOSUR members); (4) published RFB Soluções de Consulta on similar merchandise (persuasive, not binding on third parties); and (5) the NESH (persuasive, subsidiary but fundamental). If the merchandise matches the description in a WCO Classification Opinion, that classification is binding and an importer may cite the Opinion in a consulta or in defense against an RFB audit challenge. If no Opinion exists, cite the relevant NESH passage in the consulta petition and attach the English or Portuguese NESH excerpt as technical support; Cosit accords significant weight to NESH guidance when the NCM text is ambiguous or technical terms require definition.

Source: Instrução Normativa RFB 2.169/2023 (approval of consolidated NESH text); Instrução Normativa RFB 2.171/2024 (approval of WCO Classification Opinions with binding effect); RFB: Pareceres de Classificação da OMA; RFB: Notas Explicativas do Sistema Harmonizado (NESH); Sistema Classif — RFB

Brazilian customs law imposes administrative penalties for incorrect classification of merchandise in the Nomenclatura Comum do Mercosul (NCM), incorrect quantification in the statutory unit of measure, and omission or inexact reporting of information necessary for customs control. The penalty regime is governed by Decreto 6,759/2009 (the Regulamento Aduaneiro, or Customs Regulation), which establishes two principal sanctions: a 1% penalty on customs value for classification and declaration errors (Article 711), and an ***ex officio penalty of 75% or 150%* on unpaid duties when misclassification or other errors result in duty underpayment (Article 725). These penalties are cumulative and are assessed independently of the importer's intent or good faith.

1% penalty for NCM misclassification and incomplete information: Article 711. Article 711 of Decreto 6,759/2009 imposes a penalty of 1% of the customs value (valor aduaneiro) when imported or exported merchandise is:

• classified incorrectly in the Nomenclatura Comum do Mercosul (NCM), in complementary nomenclatures, or in other details established for identification of the merchandise (Inciso I);
• quantified incorrectly in the statistical unit of measure established by the Secretaria da Receita Federal do Brasil (Inciso II); or
• the subject of omitted, inexact, or incomplete information of an administrative-tax, exchange-control, or commercial nature necessary to determine the appropriate customs-control procedure (Inciso III).

The 1% penalty is calculated on the full customs value of the merchandise—the CIF value plus any adjustments required under the WTO Valuation Agreement (transaction value plus assists, royalties, packing, and proceeds of subsequent resale, if applicable)—not merely on the duty differential arising from the classification error. A misclassification that results in no change in the effective duty rate nonetheless triggers the full 1% penalty. The penalty has a floor of R$500 per occurrence (Article 711, § 3º), meaning that even a single low-value shipment misclassified by one digit incurs at minimum a R$500 sanction. There is no statutory ceiling; for high-value capital-goods imports with customs values in the millions of reais, the 1% penalty can exceed the underlying duty itself.

The Article 711 penalty applies to errors in the eighth-digit NCM code (the MERCOSUR-specific regional desdobramentos) as well as to errors in the internationally harmonized first six HS digits. It also applies to errors in Ex-tarifário designations—the temporary duty-reduction codes granted for capital goods and IT/telecom equipment with no domestic production equivalent—when the importer incorrectly declares an Ex code in the import declaration (Article 711, § 2º). The penalty is assessed automatically upon RFB discovery of the discrepancy, whether during entry clearance, in a post-clearance audit (revisão aduaneira), or in a random compliance review.

Cumulative nature and independence from duty differential. Article 711, § 6º provides that the 1% penalty does not preclude (i) assessment of the underlying unpaid duties and interest; (ii) the Article 725 ex officio penalty for inexact declarations (discussed below); or (iii) other administrative penalties and statutory interest. An importer who declares NCM 8471.30.12 (automatic data-processing machines, portable, weighing ≤ 10 kg) when the correct code is 8471.30.19 (other portable ADP machines), and thereby underpays R$15,000 in Imposto de Importação (II), faces:

• the 1% penalty on the customs value (e.g., 1% × R$300,000 CIF = R$3,000);
• the **75% ex officio penalty** on the duty differential (75% × R$15,000 = R$11,250);
• the duty principal of R$15,000; and
• interest (SELIC rate) from the date the duty became due until payment.

All four items are assessed in a single auto de infração (penalty notice) and are payable cumulatively. The total liability in this example would exceed R$29,000 plus accrued interest.

Penalty for duty underpayment: Article 725. Article 725 of Decreto 6,759/2009 imposes a separate ex officio penalty when RFB issues a duty assessment (lançamento de ofício) for unpaid or underpaid import or export duties. The penalty is calculated on the total amount of the duty or contribution at issue, or on the differential between the amount declared and the amount assessed, at the following rates:

• 75% of the unpaid duty in cases of failure to pay, failure to declare, and inexact declarations, except fraud (Inciso I); or
• 150% of the unpaid duty, independently of other administrative or criminal penalties, in cases of fraud as defined in Articles 71, 72, and 73 of Lei 4,502/1964 (which include false statements, counterfeiting or alteration of documents, and simulation designed to reduce or eliminate duty) (Inciso II).

The Article 725 penalty applies to any circumstance in which duties are assessed ex officio: misclassification, valuation adjustment, denial of preferential origin, revocation of a special customs regime, or failure to file a declaration. The 75% rate is the default; the 150% rate requires RFB to demonstrate affirmatively in the penalty notice that the conduct meets the fraud standard in Lei 4,502/1964. The burden of proof for fraud is on RFB, and CARF (Conselho Administrativo de Recursos Fiscais) has held that mere negligence, even gross negligence, does not suffice for the 150% rate.

Strict liability; irrelevance of intent and good faith. Liability for the Article 711 penalty is objective and strict: RFB assesses the penalty upon discovering an NCM-code discrepancy or incomplete declaration, without regard to the importer's intent, good faith, reliance on professional advice, or the immateriality of the error to revenue collection. Decreto 6,759/2009, Article 674, Parágrafo único, provides that "liability for an infraction is independent of the intent of the agent or the party responsible and independent of the effectiveness, nature, and extent of the effects of the act, except where expressly provided otherwise." No express exception appears in Article 711. Brazilian administrative tax courts (CARF) and federal courts have consistently held that the importer is liable for the 1% penalty even when:

• the importer relied on advice of a licensed customs broker or on a technical opinion from an industry association;
• the correct classification was unclear or subject to divergent RFB rulings in published Soluções de Consulta;
• the importer declared the merchandise in good faith under a reasonable interpretation of the GRIs;
• RFB itself could not identify the correct NCM code with certainty (CARF Súmula 161, approved 3 September 2019, expressly held that an NCM-classification error warrants the 1% penalty "even when the adjudicating body concludes that the classification indicated in the ex officio assessment would also be incorrect"); or
• the misclassification resulted in overpayment of duty (no credit or refund of the penalty is available in that case).

The only recognized defense is a pending binding-ruling request (consulta sobre classificação fiscal) filed under Instrução Normativa RFB 2,057/2021 before the import and covering the identical merchandise and classification question. When a consulta is pending at the time of entry, Decreto 70,235/1972, Article 48, suspends the statute of limitations and bars RFB from initiating a penalty proceeding on the subject matter of the consulta until 30 days after the ruling is issued. Some CARF panels have extended this protective effect to bar the Article 711 penalty for entries made during the consulta pendency, but the case law is divided.

Voluntary disclosure and post-clearance correction. Decreto 6,759/2009 does not establish a formal voluntary-disclosure program permitting importers to correct classification errors discovered after clearance without penalty. In practice, RFB has historically assessed the full Article 711 and Article 725 penalties even when the importer discovered the error, filed an amended declaration (retificação), and paid the duty differential with interest before RFB opened an audit. Unable to confirm as of 2026-06-01 whether RFB has implemented safe-harbor rules for voluntary correction consistent with the WTO Trade Facilitation Agreement Article 6.3 (ratified by Brazil and promulgated by Decreto 9,326/2018) or the 2020 Brazil–United States Economic and Trade Cooperation Agreement Protocol Article 15:7 (promulgated by Decreto 11,092/2022), both of which require member states to permit correction of errors without penalty when the importer corrects before customs discovers the error and pays the applicable duties.

Reduction for prompt payment. The Article 725 ex officio penalty (75% or 150% on the duty differential) may be reduced by 50% if the taxpayer pays the assessed duty and penalty in full within 30 days of notification of the assessment, without filing an administrative defense (impugnação) (Decreto 70,235/1972, Art. 62). This reduction does not apply to the Article 711 penalty on customs value; that penalty must be paid in full or contested through administrative or judicial review.

Administrative review. Importers may contest classification penalties through the administrative process governed by Decreto 70,235/1972. The importer files a voluntary impugnação (administrative defense) within 30 days of notification of the penalty assessment. The case is heard by a first-instance julgador in the regional Delegacia da Receita Federal de Julgamento (DRJ). Decisions of the DRJ may be appealed by either party to the Conselho Administrativo de Recursos Fiscais (CARF) in Brasília when the assessed amount exceeds the jurisdictional threshold (currently R$1 million for automatic CARF jurisdiction; lower-value cases may be appealed at CARF's discretion). CARF decisions are final at the administrative level and bind RFB. Classification disputes at CARF turn on questions of law (interpretation of the GRIs, NCM heading texts, and Section/Chapter notes) and questions of fact (the physical and functional characteristics of the merchandise); CARF applies de novo review and is not bound by RFB's proposed classification in the penalty notice. The median time from filing an impugnação to a final CARF decision in a classification case is 3–5 years.

Judicial review. After exhausting administrative review or in lieu of administrative review (when permitted by law for the specific type of assessment), the importer may file a judicial action in federal court (Justiça Federal) to annul the penalty assessment (ação anulatória de débito fiscal) or, in cases of ongoing coercion or imminent collection, a writ of security (mandado de segurança). Classification disputes are justiciable questions of law and fact subject to de novo review by the trial court (Vara Federal) and, on appeal, by the relevant Tribunal Regional Federal (TRF). Further appeal to the Superior Tribunal de Justiça (STJ) is available on questions of federal statutory or treaty interpretation. Judicial resolution of classification disputes routinely takes 5–8 years from the initial filing to final judgment at the STJ. During the pendency of administrative or judicial review, the importer may obtain a stay of collection by posting a bond (depósito judicial or seguro garantia) or by demonstrating irreparable harm.

Interaction with other penalties. The Article 711 and Article 725 penalties do not preclude other sanctions for related conduct. If misclassification is accompanied by undervaluation (declaring a CIF value lower than the price actually paid), RFB will assess both the classification penalties and a separate 100% penalty on the valuation differential under Article 108, Inciso I of Decreto 6,759/2009. If the merchandise is subject to import licensing (e.g., pharmaceuticals requiring ANVISA authorization) and the importer declared an incorrect NCM code that bypassed the licensing requirement, RFB may assess an additional 30% penalty on the customs value for importing without the required license (Article 706, Inciso I(a)). When multiple infractions are identified in the same entry, Article 706, § 3º provides that only the highest penalty applies if the infractions fall within the same provision or related provisions of the Regulation; however, penalties under different legal bases (e.g., Article 711 classification + Article 108 valuation + Article 706 licensing) are cumulative.

Source: Decreto 6.759/2009 – Regulamento Aduaneiro, Arts. 674, 706, 711, 725; Decreto 70.235/1972 – Processo Administrativo Fiscal, Arts. 48, 62

The Nomenclatura Comum do Mercosul (NCM) extends the six-digit Harmonized System nomenclature by two additional digits—the seventh digit (item) and eighth digit (subitem)—that are defined collectively by the four MERCOSUR member states (Brazil, Argentina, Paraguay, and Uruguay) and are not part of the international HS Convention. The seventh and eighth digits permit MERCOSUR to create regional subdivisions of HS subheadings (the first six digits) to accommodate tariff-policy needs, statistical-collection requirements, and trade-remedy measures specific to the customs union. All four MERCOSUR member states use identical NCM codes for the first eight digits; the NCM is the sole classification nomenclature for import and export declarations in Brazil, Argentina, Paraguay, and Uruguay.

Structure and numbering. The seventh digit (item) and eighth digit (subitem) each range from 0 to 9. A zero in the seventh or eighth position indicates the absence of a subdivision at that hierarchical level. For example, NCM 8471.30.12 (automatic data-processing machines, portable, weighing not more than 10 kg, with at least one central processing unit, one keyboard, and one display) subdivides HS subheading 8471.30 (portable automatic data-processing machines) into multiple MERCOSUR-specific items and subitems; the seventh digit "1" and the eighth digit "2" together designate a particular category of laptop computers for tariff and statistical purposes within MERCOSUR. If a six-digit HS subheading requires no regional subdivision, MERCOSUR assigns "00" as the seventh and eighth digits (e.g., NCM 0101.21.00, live pure-bred breeding horses, corresponds exactly to HS 0101.21 with no further regional desdobramento).

The NCM contains approximately 10,000 eight-digit codes. The first six digits follow the HS 2022 structure by international treaty obligation under the HS Convention (to which Brazil is a party through Decree 97,409/1988). The seventh and eighth digits are governed exclusively by MERCOSUR decisions and may differ from the regional subdivisions used by other countries or customs unions that also extend the HS beyond six digits (e.g., the European Union's eight-digit Combined Nomenclature, China's ten-digit national tariff code, or the United States' ten-digit HTSUS).

MERCOSUR decision-making structure for NCM amendments. Proposals to create, eliminate, or modify the seventh and eighth NCM digits originate in the Comitê Técnico Nº 1 – Tarifas, Nomenclatura e Classificação de Mercadorias (CT-1, Technical Committee No. 1 on Tariffs, Nomenclature, and Classification of Goods), a standing technical body of the Comissão de Comércio do MERCOSUL (CCM, MERCOSUR Trade Commission). Any MERCOSUR member state—or, in Brazil's case, any legal entity domiciled in Brazil—may submit a petition to Brazil's Ministry of Development, Industry, Trade, and Services (MDIC) to propose an NCM amendment. Brazil's Secretaria-Executiva da Câmara de Comércio Exterior (SE-Camex) coordinates Brazil's national position, submits the proposal to CT-1, and negotiates with the other three member states. CT-1 decisions require consensus of all four member states.

If CT-1 reaches consensus, the proposal advances to the CCM for approval, then to the Grupo Mercado Comum (GMC, Common Market Group) for final decision. The GMC issues a Resolução GMC (GMC Resolution) that binds all four member states. To give the GMC Resolution legal effect in Brazil, the Comitê-Executivo de Gestão da Câmara de Comércio Exterior (GECEX, Executive Management Committee of the Foreign Trade Chamber) must internalize the measure by publishing a Resolução GECEX in Brazil's Diário Oficial da União (DOU). Once a GECEX resolution incorporating a GMC decision is published, the NCM changes become binding on the Secretaria da Receita Federal do Brasil (RFB) and on all importers, exporters, and customs brokers operating in Brazil. The entire process—from initial petition to final GECEX publication—typically takes 12 to 36 months, though urgent amendments (e.g., creation of a new NCM code to implement an antidumping duty or a trade-remedy measure) can be fast-tracked through a simplified CCM procedure.

MERCOSUR Ditames de Classificação—binding classification directives. In addition to structural amendments to the NCM (creating or eliminating codes), MERCOSUR issues Ditames de Classificação (Classification Directives), which are collective rulings that specify the correct NCM code for particular merchandise when classification questions arise or when member states have applied divergent codes to the same goods. Ditames are adopted by CT-1, approved by the CCM, and published by RFB in a consolidated compendium. Unlike the WCO Harmonized System Explanatory Notes (NESH), which are persuasive but not legally binding in Brazil, MERCOSUR Ditames de Classificação possess binding character (caráter vinculativo) for RFB and for all participants in Brazilian and MERCOSUR international trade once internalized.

The RFB website publishes a consolidated Coletânea dos Ditames de Classificação do MERCOSUL (Compendium of MERCOSUR Classification Directives), updated periodically and available for download on the Sistema Classif portal. As of the December 2020 edition (the most recent consolidated compendium published by RFB as of June 2026), the Compendium contains several hundred Ditames organized numerically by NCM code, with technical descriptions of the merchandise, photographs or diagrams, and the CT-1 decision specifying the applicable eight-digit NCM code and the GRI analysis supporting that classification. When a Ditame addresses merchandise that matches the factual description in an importer's or exporter's declaration, the NCM code specified in the Ditame is binding on RFB; RFB may not classify the goods in any other heading or subheading, and the importer is entitled to rely on the Ditame as conclusive authority in defense against an audit challenge or penalty assessment.

Scope of Ditames: seventh and eighth digits only, or full eight digits? A majority of MERCOSUR Ditames address classification questions within the seventh and eighth digits—that is, they assume the correct six-digit HS subheading and resolve which MERCOSUR item or subitem applies. However, some Ditames also address the correct HS heading or subheading (the first six digits) when the four member states have encountered divergent national practices or when a new category of merchandise not contemplated by the HS Explanatory Notes requires harmonized treatment. When a Ditame specifies classification at the six-digit level in a manner that differs from a WCO Classification Opinion or the NESH, the Ditame controls for the four MERCOSUR member states, subject to any reservation Brazil may have filed under the HS Convention (rare in practice). If a conflict arises that cannot be resolved by examining the respective scopes, RFB applies the instrument most recently internalized by normative instruction.

Interaction with WCO Classification Opinions. WCO Classification Opinions adopted by the Harmonized System Committee and internalized by RFB normative instruction (most recently Instrução Normativa RFB 2,171/2024) are binding on RFB for the first six HS digits. MERCOSUR Ditames are binding for the seventh and eighth NCM digits and, where the Ditame addresses the six-digit structure, for MERCOSUR member states collectively. The two instruments normally operate in complementary spheres: WCO Opinions govern the internationally harmonized HS structure (digits 1–6), and MERCOSUR Ditames govern the regional desdobramentos (digits 7–8) and MERCOSUR-specific interpretations of ambiguous HS headings. Practitioners researching an NCM classification should consult both the WCO Opinion Compendium (available in Portuguese on Sistema Classif) and the MERCOSUR Ditames Compendium; if the merchandise matches a Ditame description, the Ditame classification is binding.

Applicability of the GRIs to the seventh and eighth digits. The General Rules for the Interpretation of the Harmonized System (GRI 1–6) apply mutatis mutandis to classification within the seventh and eighth NCM digits under GRI 6. Once a classifier has determined the correct six-digit HS subheading by applying GRI 1 through GRI 5, the classifier applies the same sequential logic to select among competing seven-digit items, comparing only items of the same hierarchical level, then applies GRI 1–5 again to select among competing eight-digit subitems within the chosen item. MERCOSUR has not adopted additional regional General Rules beyond the six HS GRIs; the Regras Gerais Complementares (General Complementary Rules) published in Brazil's Tabela de Incidência do IPI (TIPI) address packing and temporary-admission containers but do not modify the GRI hierarchy.

Searchable database and updating. The Sistema Classif portal hosted by the Portal Único de Comércio Exterior (Pucomex) provides keyword search across the full NCM nomenclature, the MERCOSUR Ditames Compendium, the WCO Classification Opinions, and the NESH. Importers and customs brokers preparing classification consultas under Instrução Normativa RFB 2,057/2021 should search the Ditames Compendium before filing; if a published Ditame matches the merchandise, the importer may cite the Ditame number and description in the consulta petition as binding authority, and RFB's Coordenação-Geral de Tributação (Cosit) will ordinarily adopt the Ditame classification in the Solução de Consulta without further analysis. The Classif portal also links each NCM code to the applicable Imposto de Importação (II) rate, the Imposto sobre Produtos Industrializados (IPI) rate, applicable trade-remedy duties (antidumping, countervailing, safeguard measures), and any Ex-tarifário temporary duty reductions for capital goods or IT/telecom equipment.

Practical guidance for importers: when do the seventh and eighth digits matter? The full eight-digit NCM code determines the applicable Imposto de Importação (II) rate, the IPI rate under the TIPI, state-level ICMS (value-added tax) treatment, eligibility for special customs regimes (e.g., drawback, foreign-trade zones, RECOF, temporary admission), the statistical unit of measure for customs declarations, applicability of import licensing or sanitary/phytosanitary controls, and applicability of antidumping or countervailing duties. Declaring an incorrect seventh or eighth digit—even when the first six digits are correct—triggers the Article 711 penalty of 1% of customs value (minimum R$500) under Decreto 6,759/2009, plus the Article 725 ex officio penalty of 75% (or 150% if fraud is established) on any duty differential, plus interest. An NCM-code error in any of the eight digits is an infraction subject to strict liability; RFB and CARF (the administrative tax court) have consistently held that good faith, reliance on professional advice, and immateriality of the error to revenue collection are not defenses.

Source: RFB: Nomenclatura Comum do Mercosul (NCM); RFB: Ditames de Classificação do MERCOSUL; MDIC: Alterações da Nomenclatura e Tarifa Externa Comum do MERCOSUL (NCM/TEC - CT-1); Sistema Classif — RFB

Before filing an import or export declaration in SISCOMEX—or before requesting a binding classification ruling (consulta sobre classificação fiscal) from RFB—importers, exporters, and customs brokers must determine the correct eight-digit NCM code for the merchandise. The Secretaria da Receita Federal do Brasil (RFB) provides the Sistema Classif, a free digital platform that consolidates the complete NCM nomenclature, historical amendments, the WCO Harmonized System Explanatory Notes (NESH), published classification rulings (Soluções de Consulta), WCO Classification Opinions, and MERCOSUR classification directives (Ditames de Classificação) in a single searchable interface. Classif is the authoritative source for NCM research; third-party commercial databases may lag behind official NCM amendments published by CAMEX resolution and should not be relied upon for compliance purposes.

Access and interface. Sistema Classif is hosted on the Portal Único do Comércio Exterior (Pucomex) at https://portalunico.siscomex.gov.br/classif/. The system is accessible to the public without login credentials; users complete a captcha validation to confirm human access and then navigate freely through all modules. Authenticated access via digital certificate (e-CNPJ or e-CPF) unlocks additional features for licensed customs brokers and RFB staff—including full-text access to unpublished ruling details and the ability to download NCM tables in JSON and XLSX formats with legal-act citations—but the core classification-research functions are available to all users without authentication. The Classif interface is available in Portuguese; English and Spanish translations of the HS nomenclature are accessible through external links to the WCO and ALADI (Associação Latino-Americana de Integração) websites.

Two principal search methods: keyword and tree navigation. RFB guidance published on the NCM page of the Receita Federal website states that "consultation in the NCM On-line can be made through search by code or words and by navigation in the NCM tree." The two methods address different starting points in the classification process.

**Keyword search (Pesquisa Integrada)** is appropriate when the classifier knows the common commercial name or technical description of the merchandise but does not yet know the applicable HS Chapter or NCM heading. The Pesquisa Integrada module performs simultaneous searches across the NCM code descriptions, Section and Chapter notes, the NESH text, published Soluções de Consulta, WCO Classification Opinions, and MERCOSUR Ditames. Results are displayed in tabbed panels organized by source type. For example, a keyword search for "bomba centrífuga" (centrifugal pump) returns matching NCM codes in Chapter 84 (machinery), excerpts from the Chapter 84 notes distinguishing pumps (heading 84.13) from compressors (heading 84.14), relevant NESH passages on pump classification, and past RFB rulings on specific pump models. The search algorithm indexes the full hierarchical description chain—Section title, Chapter title, heading, subheading, item, and subitem—so a search for "motor elétrico" will match codes within heading 85.01 even when the eight-digit subitem description reads only "Outros" (Other), because the heading text "Motores e geradores, elétricos" appears higher in the hierarchy.

Classif's Pesquisa Integrada also incorporates an artificial-intelligence suggestion feature (referred to in RFB materials as "sugestões de inteligência artificial") that proposes candidate NCM codes based on semantic similarity to the query terms. This AI layer is advisory only; it is not a substitute for applying the GRIs and reading the Section/Chapter notes. Practitioners should treat AI-suggested codes as leads to be verified by examining the legal texts of the heading, subheading, and relevant notes, not as authoritative classification decisions.

**Tree navigation (Navegação na árvore da NCM)** is the method required by GRI 1 and is appropriate when the classifier has already identified the relevant HS Chapter or heading through application of the GRI sequence. The NCM table in Classif displays the full hierarchical structure: 21 Sections, 96 Chapters, and approximately 10,000 eight-digit codes. The user expands a Section to view its Chapters, expands a Chapter to view four-digit headings, expands a heading to view six-digit subheadings, and finally expands the subheading to view the seventh-digit item and eighth-digit subitem (the MERCOSUR-specific regional desdobramentos). At each level of expansion, Classif displays the legal description text in its original formatting—bold type for heading text, italics and indents for subheadings and notes—preserving the structure published in CAMEX resolutions. Section and Chapter notes are accessible by clicking the note icon next to the Section or Chapter title; Subheading notes, where they exist, appear in collapsible panels within the heading view.

Tree navigation enforces the discipline required by GRI 6: the classifier determines the four-digit heading by applying GRI 1–5 to heading-level texts, then applies GRI 1–5 mutatis mutandis to choose among six-digit subheadings within that heading, comparing only subheadings at the same hierarchical level, and finally selects the eight-digit NCM code by the same logic. Attempting to compare a subheading under one heading with a subheading under a different heading—without first determining that both headings are "equally specific" under GRI 3(a)—is a methodological error that Classif's tree interface discourages by its structure.

Viewing NCM code details and ancillary information. When the user selects a specific eight-digit NCM code in Classif, the system displays a detail panel containing: (i) the full hierarchical description (Section / Chapter / Heading / Subheading / Item / Subitem); (ii) the legal basis for the code (typically a CAMEX Resolution number and effective date); (iii) the history of amendments to that code, with past descriptions and the CAMEX acts that modified them; (iv) relevant excerpts from the NESH for the corresponding six-digit HS position; and (v) links to published Soluções de Consulta, WCO Opinions, and MERCOSUR Ditames that address merchandise classified in that code or in nearby codes within the same heading.

The detail panel includes an "IMP" (Importação) button and an "EXP" (Exportação) button. Clicking "IMP" opens a tax-treatment simulator showing the Imposto de Importação (II) ad valorem rate under the Tarifa Externa Comum (TEC), any applicable Ex-tarifário temporary duty reductions, antidumping or countervailing duties in force, and the IPI (Imposto sobre Produtos Industrializados) rate from the TIPI table. The simulator allows the user to select the country of origin to view preferential tariff treatment under bilateral or regional free-trade agreements (e.g., MERCOSUR intra-bloc zero duty, or reduced rates under Brazil's agreements with Chile, Peru, Colombia, or the Southern African Customs Union). Clicking "EXP" displays export-duty rates (zero for most goods; positive rates apply to a handful of raw materials and semi-finished products under the Imposto de Exportação regime) and any export-licensing requirements. RFB guidance published in August 2023 states that the treatment-simulator module integrates with the Portal Único's administrative-treatment (Tratamento Administrativo, TA) database, so the Classif display will flag when an NCM code is subject to ANVISA sanitary authorization, IBAMA environmental permits, DECEX export licenses, or other non-tariff requirements administered by sectoral agencies.

Historical NCM table and forward-looking changes. Classif includes a historical-query function accessible through the Histórico da NCM module. Users may select a past date and view the NCM table as it existed on that date, with the legal descriptions, Section/Chapter notes, and CAMEX resolution in force at that time. This feature is essential for classifying merchandise imported in prior years when conducting voluntary disclosures or defending against RFB audits that challenge entries made under an earlier NCM edition. The historical function also allows queries for future effective dates when CAMEX has published an NCM amendment that will take effect on a specified date (typically 1 January following the entry into force of a new HS edition or a MERCOSUR nomenclature revision). RFB's Download NCM page states that the downloadable JSON and XLSX files contain only the NCM table currently in force and do not include past or future codes; users researching historical or future nomenclature must use the Classif web interface.

Downloadable NCM tables. For users who require offline access or wish to integrate NCM data into enterprise resource planning (ERP) or customs-management software, Classif offers three download formats: (i) JSON (JavaScript Object Notation), a plain-text machine-readable format containing code, description, and legal-act citation without text formatting; (ii) XLSX (Excel) without concatenated descriptions, containing code, description, and legal act with rich-text formatting (bold, italics, indents) but showing only the terminal-level description (e.g., "Outros" for a subitem, without the parent heading/subheading text); and (iii) XLSX with concatenated descriptions, in which each row displays the full hierarchical path from Section through subitem. The JSON download is available without captcha validation via a direct public API endpoint at https://portalunico.siscomex.gov.br/classif/api/publico/nomenclatura/download/json. The XLSX downloads require captcha completion through the Classif portal. All download files reflect the NCM table in force on the date of download; they are regenerated automatically when CAMEX publishes a new resolution amending the nomenclature.

Practical workflow for NCM research. RFB does not mandate a specific research methodology, but the following sequence aligns with the GRI hierarchy and with the structure of the Classif interface:

1. Identify the nature and composition of the merchandise. Gather technical specifications, product catalogs, laboratory analysis, or certificates of composition. Determine whether the merchandise is a single-component article, a composite good, a mixture, a retail set, or an incomplete/unfinished article. If the merchandise contains multiple materials or components, identify which material or component may impart the essential character (GRI 3(b)).

1. Conduct a keyword search in Classif using the commercial name, technical name, or principal material. Review the candidate NCM codes returned in the search results and note the HS Chapter(s) in which they appear.

1. Read the Section and Chapter notes for the identified Chapter(s). Determine whether any Section or Chapter note excludes the merchandise from that Section or Chapter, or includes it by express provision. If a note resolves the classification by inclusion or exclusion, no further comparison with other Chapters is needed (GRI 1).

1. Navigate the NCM tree within the identified Chapter. Expand headings that describe the merchandise or its principal component. Read the heading text and any Subheading notes. Apply GRI 2(a) if the merchandise is incomplete, unfinished, or presented disassembled. Apply GRI 2(b) if the merchandise is a mixture or contains the referenced material mixed with other materials.

1. If two or more headings describe the merchandise, apply GRI 3 in sequence: (a) most specific heading prevails; if that does not resolve, (b) classify by the material or component that imparts essential character; if that does not resolve, (c) classify in the heading that occurs last in numerical order.

1. Once the four-digit heading is determined, apply GRI 1–5 mutatis mutandis at the subheading level (six digits), then at the item (seventh digit) and subitem (eighth digit) levels, comparing only codes at the same hierarchical tier.

1. Review the NESH excerpt displayed in the Classif detail panel for the candidate NCM code. Check whether the NESH description matches the merchandise and whether any NESH exclusions apply.

1. **Search published Soluções de Consulta, WCO Opinions, and MERCOSUR Ditames** in Classif's integrated-search results or in the decision-database module. If a published ruling or WCO Opinion describes merchandise identical or highly similar to the goods at issue, and the factual description in the ruling matches the merchandise, that ruling is strong persuasive authority (for Soluções de Consulta) or binding authority (for WCO Opinions internalized by IN RFB 2,171/2024). Cite the ruling number and decision in the import declaration's supporting documentation or in a consulta petition.

1. If uncertainty remains, or if the merchandise is novel, or if divergent rulings exist for similar goods, file a formal consulta sobre classificação fiscal under IN RFB 2,057/2021. Attach the Classif search results, NESH excerpts, and technical documentation to the petition. Do not import the merchandise under an uncertain classification and risk the Article 711 penalty (1% of customs value) and the Article 725 ex officio penalty (75% or 150% of any duty differential). The consulta suspends the statute of limitations and provides audit protection during the pendency of RFB's decision.

Limitations of keyword search; GRI 1 controls. Keyword search is a convenience tool, not a substitute for reading the legal texts. The Classif search algorithm indexes Portuguese-language descriptions and may not capture technical terms in English, Spanish, or other languages, or may return false positives when a common word appears in multiple unrelated headings. The NCM is organized by the nature, material, and function of the merchandise according to the HS Convention's progression from raw materials to finished goods (live animals in Chapter 1, works of art in Chapter 97), not by alphabetical keyword. A keyword search for "plástico" (plastic) will return hits in Chapter 39 (primary-form plastics), Chapter 40 (rubber and plastics articles for technical use), Chapter 42 (plastic travel goods and handbags), Chapter 63 (plastic textiles), Chapter 73 (plastic fittings for pipes), Chapter 84 (plastic parts of machinery), Chapter 85 (plastic parts of electrical apparatus), Chapter 90 (plastic optical instruments), Chapter 94 (plastic furniture), and Chapter 95 (plastic toys). Only by reading the Section and Chapter notes and applying GRI 1–3 can the classifier determine which Chapter governs. Keyword search is a discovery tool; the GRI sequence and the legal texts are the law.

Role of Classif in administrative and judicial proceedings. RFB auditors conducting post-clearance reviews (revisão aduaneira) and CARF (Conselho Administrativo de Recursos Fiscais) judges deciding classification disputes routinely cite Classif database entries—particularly published Soluções de Consulta and WCO Opinions—as authority in penalty assessments and decisions. An importer defending a challenged classification in a CARF appeal is well-advised to submit printouts or PDF exports from Classif showing (i) the NCM code description and Section/Chapter notes as they existed on the date of entry; (ii) relevant NESH excerpts; (iii) any published rulings on similar merchandise; and (iv) the absence of a WCO Opinion requiring a different classification. The Classif database is admissible evidence in both administrative tax proceedings and in federal-court litigation (ação anulatória de débito fiscal) as an official publication of RFB. Courts treat Classif's historical-NCM function as authoritative proof of the nomenclature in force on a given date, superior to third-party databases or to printouts from commercial software.

Source: RFB: NCM; RFB: Sistema Classif; RFB: Download NCM; Portal Único Siscomex: Classif

The seventh and eighth digits of the Nomenclatura Comum do Mercosul (NCM) — which distinguish the NCM from the six-digit Harmonized System (HS) maintained by the World Customs Organization — are governed by Ditames de Classificação (Classification Directives) issued collectively by the four MERCOSUR member states (Argentina, Brazil, Paraguay, and Uruguay). Ditames are binding classification decisions adopted at the regional level through the MERCOSUR institutional framework and internalized into Brazilian law by the Secretaria da Receita Federal do Brasil (RFB). Once internalized, RFB's official website states that Ditames "são de cumprimento obrigatório por parte da Secretaria Especial da Receita Federal do Brasil (RFB) e dos demais intervenientes no comércio nacional e internacional" — are of mandatory compliance by RFB and all other participants in national and international trade.

Institutional origin and approval process. MERCOSUR Ditames originate in the Comitê Técnico Nº 1 – Tarifas, Nomenclatura e Classificação de Mercadorias (CT-1, Technical Committee No. 1 on Tariffs, Nomenclature, and Classification of Merchandise), a specialized working body of the Comissão de Comércio do MERCOSUL (CCM, MERCOSUR Trade Commission). CT-1 is the forum in which the four national customs authorities coordinate and harmonize classification practice for the regional NCM structure. When the customs authority of one MERCOSUR member state proposes a classification for specific merchandise affecting the seventh or eighth NCM digits, CT-1 reviews the proposal and, if the four member states reach consensus, drafts a Ditame and submits it to the CCM for formal approval. The CCM approves Ditames by issuing a Diretriz (Directive), which is the CCM's binding decision instrument. Once the CCM approves a Diretriz adopting the Ditame, the four member states internalize the Ditame into their respective national legal orders.

The Ditames process is analogous to the WCO's issuance of Classification Opinions for the first six HS digits, but it operates at the MERCOSUR regional level and governs only the seventh and eighth NCM digits, which fall outside WCO jurisdiction.

Internalization in Brazil. Brazil internalizes MERCOSUR Ditames through the Ato Declaratório Executivo (Executive Declaratory Act) issued by the Secretário Especial da Receita Federal do Brasil. The legal authority for this internalization procedure is Decreto 766 of 3 March 1993, Article 2, which provides that "As futuras alterações à referida nomenclatura serão aprovadas pelo Secretário da Receita Federal, do Ministério da Fazenda" (future alterations to the nomenclature shall be approved by the Secretary of the Federal Revenue of the Ministry of Finance). This delegation extends to NCM regional desdobramentos — the seventh and eighth digits.

A typical Ato Declaratório Executivo cites the underlying CCM Diretriz or Diretrizes (e.g., Ato Declaratório Executivo RFB nº 3/2020 cited "Diretrizes nº 74/19, 12/20, 13/20, 57/20 e 58/20 da Comissão de Comércio do Mercosul (CCM), que aprovaram os Ditames de Classificação nº 01/19, 01/20, 02/20, 03/20 e 04/20"), declares the NCM classification of the specified merchandise, and provides an effective date. The Ato is published in the Diário Oficial da União and posted on RFB's Sistema Classif platform, where it becomes searchable by NCM code, merchandise description, or Ditame number. RFB publishes a consolidated Coletânea dos Ditames de Classificação do MERCOSUL (Collection of MERCOSUR Classification Directives) on its website; the Coletânea updated through December 2020 contains several hundred Ditames issued since the NCM's inception in 1995, organized numerically by NCM code.

Binding effect and scope. The mandatory-compliance statement on RFB's website means that an importer who declares merchandise in an NCM code that conflicts with an applicable Ditame is subject to penalties for NCM misclassification under Decreto 6,759/2009 (the Customs Regulation), even if the importer's chosen code appears facially consistent with the NCM text and the General Rules of Interpretation. The penalties for NCM misclassification are addressed in detail in the separate section on penalties published in this guide; they include a 1% penalty on customs value (Article 711) plus an ex officio penalty of 75% or 150% on any duty differential (Article 725).

The binding effect of a Ditame extends only to merchandise that matches the technical description in the Ditame. Ditames provide detailed descriptions of the merchandise's composition, construction, intended use, and functional characteristics, often accompanied by photographs or technical diagrams. If the merchandise to be classified differs materially from the Ditame description — for example, a different chemical composition, a different intended use, or a different manufacturing process — the Ditame does not apply, and the classification must proceed by application of the GRIs to the NCM text and notes.

Interaction with WCO Classification Opinions. WCO Classification Opinions, once internalized by RFB under Instrução Normativa RFB 2,171/2024, bind Brazil for the first six digits of the NCM (the internationally harmonized HS structure). MERCOSUR Ditames bind Brazil for the seventh and eighth digits, which are specific to the MERCOSUR customs union. When a WCO Classification Opinion determines that merchandise belongs in a particular six-digit HS subheading, and a MERCOSUR Ditame specifies the corresponding seven- and eight-digit NCM code within that subheading, the two instruments are complementary and both bind RFB. Unable to confirm as of 2026-06-01 the formal procedure when a MERCOSUR Ditame appears to conflict with a WCO Classification Opinion at the six-digit HS level, or the mechanism by which CT-1 or the CCM resolves such conflicts through referral to the WCO Harmonized System Committee.

Searchable database and practical guidance. The full text of all internalized Ditames is available in the Coletânea dos Ditames de Classificação do MERCOSUL on RFB's website and on the Sistema Classif platform hosted on the Portal Único de Comércio Exterior (Pucomex). The Classif search interface allows keyword searches across Ditame descriptions, browsing by NCM code, and filtering by effective-date range. Each Ditame entry in the database includes the CCM Diretriz number and date, the Brazilian internalizing Ato Declaratório Executivo citation, the merchandise description, photographs or technical diagrams (when provided), and the definitive NCM code.

Importers and customs brokers researching classification questions should consult the Coletânea as a first step after identifying the likely six-digit HS subheading. If a Ditame exists for merchandise matching or substantially similar to the goods to be classified, that Ditame controls the seventh and eighth NCM digits, and RFB will not accept a different classification absent evidence that the merchandise differs materially from the Ditame description.

When filing a consulta sobre classificação fiscal (binding classification ruling request) under Instrução Normativa RFB 2,057/2021, cite the applicable Ditame by number, CCM Diretriz, and Ato Declaratório Executivo in the petition and attach the Ditame excerpt from the Coletânea as technical support. RFB's Coordenação-Geral de Tributação (Cosit) accords Ditames binding weight, and a consulta petition that demonstrates the merchandise matches an existing Ditame description will ordinarily receive a favorable ruling confirming the Ditame classification. Conversely, if an importer proposes an NCM code that conflicts with an applicable Ditame without demonstrating that the merchandise differs from the Ditame description, Cosit will issue an unfavorable ruling citing the Ditame as controlling authority.

Effective dates and prospective application. When RFB internalizes a new Ditame by Ato Declaratório Executivo, the Ato specifies an effective date. Entries cleared before the effective date are governed by the NCM structure and classification practice in force at the time of entry; RFB may not retroactively assess penalties or duty differentials based on a Ditame that was not yet in force when the merchandise was imported. If a Ditame supersedes or revokes a prior Ditame and changes the correct NCM code for specified merchandise, the new classification applies only to entries on or after the effective date of the superseding Ato. Importers with ongoing shipments of affected merchandise should monitor the Diário Oficial da União and the Sistema Classif database for Atos Declaratórios Executivos internalizing new or amended Ditames.

Source: Decreto 766/1993, Art. 2; RFB: Ditames de Classificação do MERCOSUL; Coletânea dos Ditames de Classificação do MERCOSUL (PDF, atualizada até dezembro de 2020)