General Rules of Interpretation (GRI 1–6) — Application framework
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
Binding classification ruling (consulta) procedure and effects
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
Interpretive weight of HS Explanatory Notes (NESH) and WCO classification opinions
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
Penalties for NCM misclassification and incomplete declarations (post-2026 changes)
Material update effective January 2026: The penalty regime for NCM (Nomenclatura Comum do Mercosul) misclassification in Brazil underwent a major statutory change with the entry into force of Lei Complementar nº 227/2026 and associated IBS/CBS regulations.
Revocation of 1% penalty on customs value:
- The longstanding penalty of 1% of customs value for NCM code misclassification or incomplete customs declarations (Decree 6,759/2009, Article 711; previously also provided in MP 2.158-35/2001 art. 84 and Lei 10.833/2003 art. 69) has been expressly revoked as of 1 January 2026. LC 227/2026, article 53(IV) and article 74, extinguished the legal basis for imposition of the “ad valorem” penalty, applicable both at entry and during post-clearance audits.
- Importers, exporters, and customs brokers will no longer receive the automatic 1% penalty for an NCM misclassification identified by Receita Federal for shipments registered after the effective date. This revocation applies to all customs-cleared transactions from January 2026 onward.
- The revocation has been recognized in binding CARF (Conselho Administrativo de Recursos Fiscais) decisions from February 2026, which have annulled pending assessments for the 1% penalty based on the new legal framework. Retrospective application is not presumed—entries registered before the effective date remain governed by the prior regime unless an express retroactive provision exists in LC 227/2026 (none found as of June 2026).
New penalty system under IBS/CBS reform (from 2026):
- Penalties for omissions or inaccuracies in information required for customs control—including NCM misdeclarations—now fall under the regime created by LC 214/2025, Article 341-G (applicable to customs information under union competence).
- The penalty for omitting or misreporting information necessary for import clearance (including errors in NCM declaration) is now standardized at 100 UPF (Unidade Padrão Fiscal) per infraction—as of mid-2026, this is approximately R$20,000, but the value is updated annually by Receita Federal.
- The penalty is not ad valorem and does not scale with shipment value or duty differential. Instead, it applies per qualifying infraction. Under the regulatory decree, a single shipment with multiple errors may trigger cumulative penalties if separate informational omissions/inaccuracies are identified (e.g., NCM+unit of measure+origin).
- The law allows for prompt payment reductions (50% if paid within 30 days, consistent with other IBS/CBS penalty rules) and reductions under future regulatory conformity or self-disclosure programs (pending secondary regulation).
Duty underpayment and fraud penalties:
- For cases where an NCM error results in duty underpayment, Article 725 of Decree 6,759/2009 (the 75%/150% “ex officio” penalty) remains in effect for non-IBS duties (e.g., II, IPI), unless explicitly repealed. LC 227/2026 did not repeal Article 725, and CARF has confirmed ongoing application for non-IBS taxes.
- Under the new regime, CBS/IBS-specific penalties for tax loss due to misclassification are governed by the general regime for tax evasion (also reformed by the tax package, see LC 214/2025 Art. 357). When NCM misclassification is deemed intentional tax evasion, heavier penalties (up to 150% or criminal sanctions) may apply.
Transitional and open questions:
- Voluntary disclosure: LC 214/2025 and LC 227/2026 anticipate secondary regulation to create safe-harbor rules for voluntary correction of errors before discovery by Receita Federal, in line with Brazil’s commitments under the WTO Trade Facilitation Agreement. As of June 2026, no final implementing rule for voluntary correction/safe harbor has been published. Practitioners should monitor Receita Federal publications.
- Administrative and judicial appeal: The fundamental appeal structure for penalty defenses remains the same (Decreto 70.235/1972), with first-instance review at DRJ and appeal to CARF. New IBS/CBS infraction cases are expected to be reviewed under the same administrative process.
Source law in force for penalties (from 2026):
- "1% penalty on customs value": No longer in force for entries registered after 2025 (expressly revoked by LC 227/2026).
- New informational penalty: LC 214/2025 art. 341-G (RFB UPF table: https://www.gov.br/receitafederal/pt-br/assuntos/legislacao/atos-normativos/upf)
Authority and sources: Source: Lei Complementar nº 227/2026 - art. 53(IV), 74 (revokes 1% penalty from Art. 711 of Decree 6.759/2009); Lei Complementar nº 214/2025, art. 341-G (new penalty for omission/inaccuracy in customs declarations); CARF: Recent decisions 2026 (acknowledges revocation and application in fiscal litigation); Decreto 70.235/1972 – Processo Administrativo Fiscal (still governs administrative appeal).
MERCOSUR Ditames de Classificação — binding regional directives for 7th and 8th NCM digits
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.
June 2026 material update: RFB now publishes the consolidated Coletânea dos Ditames de Classificação do MERCOSUL as a continuously updated web page, reflecting all internalized Ditames through the most recent Ato Declaratório Executivo RFB nº 4/2026 (published 23 June 2026). The older 2020 PDF is superseded. Practitioners must consult the current web version for the full set of binding Ditames and classification details.
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). Effective 2026, penalty amounts and procedures reflect reforms discussed in the guide's penalty section.
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 continuously updated 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 effective dates, the CCM Diretriz number and date, the Brazilian internalizing Ato Declaratório Executivo citation, merchandise description, and technical diagrams or photographs (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 (continually updated, includes Ato Declaratório Executivo RFB nº 4/2026, 23 June 2026); Sistema Classif — Pucomex
MERCOSUR seventh and eighth NCM digits (item and subitem) and Ditames de Classificação
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
NCM code research tools — Sistema Classif and practical methodology
The Secretaria da Receita Federal do Brasil (RFB) provides the Sistema Classif, a comprehensive online platform essential for accurate NCM (Nomenclatura Comum do Mercosul) code research prior to import/export declarations in SISCOMEX or submission of a binding classification ruling (consulta sobre classificação fiscal). Classif aggregates the official NCM nomenclature, historical amendments, WCO Explanatory Notes (NESH), published classification rulings (Soluções de Consulta), WCO Classification Opinions, and MERCOSUR Ditames, searchable in a single public interface. Classif remains the authoritative, up-to-date reference; practitioners should not rely on third-party or commercial databases for compliance, as these may lag behind CAMEX/GECEX amendments.
Main Access and Research Modes
- Sistema Classif is accessible to the public via the Portal Único do Comércio Exterior (Pucomex) at https://portalunico.siscomex.gov.br/classif/. While general search and review functions do not require authentication, as of early 2026, new modules unlocked via digital certificate (e-CNPJ/e-CPF) provide licensed users with advanced analytical and cross-referenced historical data. These new features include viewing product-catalog attributes relevant to import declarations, as well as expanded export-import simulation tools.
Principal Search Methods (per RFB guidance):
- Keyword search (Pesquisa Integrada): When only the commercial/technical description is available, this searches NCM descriptions, Section/Chapter notes, NESH excerpts, Soluções de Consulta, WCO Opinions, and MERCOSUR Ditames. Since 2025–2026, an expanded AI suggestion feature proposes eight‑digit NCM codes most closely matching the search term, with a disclaimer that these are advisory unless verified through application of the legal texts. Notably, RFB publications stress that suggested codes are leads only and practitioners must apply the GRIs and legal notes.
- Tree navigation (Navegação na árvore da NCM): This method follows the legal, hierarchical structure of the NCM: users explore from Section through Chapter, heading, subheading, item, and subitem. The full description path and legal basis (CAMEX/GECEX Resolution) are displayed for every code. Section/Chapter/Subheading notes are accessible contextually.
Recent and Confirmed Functional Additions (2025–2026):
- The Classif simulator now provides not just import duty (II/Tarifa Externa Comum) and IPI rates, but also product‑catalog attributes essential for compliant declarations, and, in export simulation, foreign currency rates (cotação de moedas) for reference. The TA (Tratamento Administrativo) database flags where import licensing or agency approvals (ANVISA, IBAMA, DECEX) may be required.
- The historical query function (Histórico da NCM) remains available for reference to past and future-effective NCM tables. All downloadable NCM tables reflect the current code list only—historical or prospective tables require use of the interface.
Practical Workflow (documented RFB/Portal Único guidance):
- Identify merchandise characteristics and composition with supporting documentation.
- Use keyword search for candidate NCMs; check results across tabs for rulings, NESH, and Ditames.
- Review Section and Chapter notes for candidate Chapters—if these control, stop further comparison (GRI 1).
- Navigate via tree to confirm placement in proper Section, Chapter, and heading/subheading; read applicable subheading notes.
- Apply GRI 2(a) (unfinished/disassembled goods) or GRI 2(b) (mixtures) as known.
- Where multiple headings apply, use GRI 3(a–c). Complete selection of four-digit heading before moving among peer subheadings/items/subitems (GRI 6).
- Confirm details using the NESH, Ditames, and rulings. RFB guidance stresses that matching published rulings or opinions is strongly persuasive/binding only if factual similarity is close.
- If ambiguity or conflicting precedent exists, file a formal consulta under IN RFB 2.057/2021.
Limitations:
- Keyword/AI search is a discovery tool only (not a substitute for statutory text); responsibility remains with the classifier to apply notes and GRIs.
- Downloaded NCM tables do not contain annotated notes or prior/future code states; the historical analysis must be performed within Classif.
Material changes: As of 2026, the Classif platform features new authentication-based modules for advanced research, displays product‑catalog attributes and foreign-currency information, and incorporates an improved AI-based suggestion tool. These enhancements have been confirmed in RFB and Classif platform publications dated January–March 2026.
Source: RFB: NCM; RFB: Sistema Classif; Portal Único Siscomex: Classif
Notas Complementares (NC) in TIPI — Legal Status and Effect on NCM Classification
Notas Complementares (NC, Complementary Notes) are binding interpretive provisions within Brazil’s Tabela de Incidência do IPI (TIPI), created or amended by presidential decree to clarify the scope, definition, or special rules for NCM chapters and headings for both customs and domestic excise tax (IPI) purposes.
Recent Material Amendment: Decreto No. 12.549/2025
- Decreto No. 12.549/2025 (published 10 July 2025, effective 1 November 2025) introduced significant changes to the TIPI including the addition of several new Notas Complementares to Chapter 87. Specifically, NC (87‑13), NC (87‑14), and NC (87‑15) were added, and textual adjustments were made across multiple NCs within the automotive section. These new NCs affect not only the classification but also the incidence and timing of IPI and customs measurement, especially for certain automotive goods, with new legal definitions and interpretive notes on classification boundaries.
- Decreto No. 12.549/2025 also established a minimum IPI rate of zero percent in cases where amendments or reductions would otherwise result in a negative rate, effective for all subsequent NC applications—a rule designed to prevent negative taxation even in the presence of further future reductions or NC amendments (see Art. 2 and relevant annex tables of the decree).
Legal Hierarchy and Effect
- The currently operative Notas Complementares are those annexed to and consolidated in the most current TIPI decree—presently Decreto 12.549/2025.
- Interpretive hierarchy: Notas Complementares issued by TIPI decrees hold binding force for Brazilian customs and tax authorities, and are explicitly applied in preference to HS Explanatory Notes (NESH) and MERCOSUR Ditames when there is a direct legal or interpretive conflict (Decree 11.158/2022, Art. 7; Decreto 12.549/2025, Art. 2 and Annex).
- The General Rules of Interpretation (GRIs) and the NCM legal structure are still applied in hierarchical sequence, but when a NC (Complementary Note) exists, its language functions as a special or overriding rule within its stated scope and must be directly consulted for every affected NCM/position.
- Regulatory controls (ANVISA, MAPA, IBAMA, etc.) frequently reference the NCM as defined or qualified by these Notas Complementares for import licensing and compliance purposes.
Compliance and Research Notes
- The text of all effective Notas Complementares is published within the annexes of the latest TIPI decree, with open access via the official federal portal. Additional historical and forward-looking versions are accessible through the Receita Federal’s Sistema Classif platform.
- It remains essential for practitioners to verify the exact effective date of any particular NC, as textual content and legal effect may change between editions of the TIPI, especially in automotive and chemical chapters which have seen the most frequent NC amendments in the last three years.
- All rules regarding the non-retroactivity of NC amendments/notas are controlled by the effective date in the published decree. Unless otherwise stated, the new or amended NCs only apply prospectively from the effective date.
Material change summary: Practitioners must now account for the implementation of NC (87‑13), (87‑14), and (87‑15) and the structure of the minimum‑0% IPI rate, all operative from 1 November 2025 under Decreto 12.549/2025. Additional amendments to existing NCs may affect classification and IPI liability for goods registered on or after this effective date. Consult the official Decreto annexed tables and the Sistema Classif for current rule text.
Source: Decreto 12.549/2025 (TIPI update, NCs for Chapter 87, minimum‑0% IPI rule); Decreto 11.158/2022 (TIPI 2022, base text); Sistema Classif — Receita Federal
Ex-tarifário Regime — NCM Classification and Temporary Duty Reduction for Capital and IT Goods
Material update June 2026: Additional Resoluções Gecex amending Ex-tarifário annexes and compliance framework.
Since early June 2026, there have been several material amendments and updates to the Ex-tarifário regime for capital (BK) and information/telecommunications (BIT) goods, including:
1. April–June 2026 Resolutions:
- Resolução Gecex/Camex nº 871/2026 (effective April 1, 2026): This resolution implemented updated technical criteria and revised annexes for Ex-tarifário BK and BIT under Res. Gecex 780/2025, changing which goods (by NCM+description) are eligible for temporary import duty reduction. The new text and annex entries are operative as of April 1, 2026.
- Resoluções Gecex nº 902, 912, 913, 914, 915, 917/2026 (effective June 12, 2026): This group of resolutions materially amended the lists of Ex-tarifário concessions by adding, modifying, or revoking BK, BIT, and automotive Ex-tarifários through corresponding annex changes to Res. Gecex 780/2025 and 781/2025. Each new or revoked Ex-tarifário applies from the effective date stated in the published annexes; importers must verify eligibility prior to importation under the current list.
2. Regulatory framework and provisional benefits:
- The main structural regime remains governed by Resolução Gecex 512/2023 as amended (notably by 853/2026), permitting provisional Ex-tarifário grants under Article 8-A pending full technical review. All procedural and compliance rules of Res. Gecex 512/2023 and Portaria ME/SDIC 287/2023 still apply. Compliance failures, including misclassification or misstatement in SISCOMEX declarations, remain grounds for denial or retroactive loss of exemption and are subject to penalty under Decree 6.759/2009.
3. Mandatory action for practitioners:
- Importers and brokers must always consult the current, consolidated annexes published alongside the most recent Resoluções Gecex to verify if a product (at NCM+description level) is eligible. Both new benefits and revocations took effect as of June 2026, and prior grants do not carry forward if revoked.
Summary of recent material changes:
- Major annex amendment to eligible Ex-tarifário lists in April and June 2026.
- Provisional benefit mechanism remains in force per prior regulatory update.
- Section now incorporates effective-date tracking for all active/revoked Ex-tarifários as per updated annexes.
Authority and sources: Source: Resolução Gecex/Camex nº 871/2026; Resolução Gecex n° 902/2026; Resolução Gecex n° 913/2026; Resolução Gecex n° 914/2026; Resolução Gecex n° 915/2026; Resolução Gecex n° 917/2026; Resolução Gecex n° 780/2025; Resolução Gecex n° 512/2023
Legal Effect of Section and Chapter Notes in NCM Classification
Section and Chapter Notes are integral, binding components of Brazil's Nomenclatura Comum do Mercosul (NCM) and operate as the primary legal filters in tariff classification, holding precedence over heading, subheading, and Notas Explicativas (NESH, Explanatory Notes) where there is textual conflict. Under General Rule of Interpretation (GRI) 1, “the titles of sections, chapters and subchapters are provided for ease of reference only; for legal purposes, classification shall be determined according to the terms of the headings and any relative Section or Chapter Notes.” This legal force is enshrined both by the international HS Convention (as incorporated via Decreto 97.409/1988) and by repeated Brazilian regulations, including the current Tabela de Incidência do IPI (TIPI) and the NCM table consolidated by CAMEX and Receita Federal do Brasil (RFB).
Binding legal status and hierarchy. Section and Chapter Notes are not mere interpretive aids—they are enforceable legal text. If a Note explicitly includes or excludes certain goods, or defines terms used in headings, its mandate trumps any implicit meaning in heading or subheading text. Both RFB and administrative courts (CARF) routinely rule that omission of relevant Notes (or failure to apply their definitions and exclusions) is a fundamental classification error: by law, Notes must be read and given effect before consulting Explanatory Notes, WCO Opinions, or MERCOSUR Ditames. The rules of precedence are: (1) NCM code and Section/Chapter Notes; (2) Complementary Notes (NC) in TIPI; (3) GRI sequence; (4) Ditames (for 7th/8th digits). NESH, WCO Opinions, and Soluções de Consulta are always subsidiary, never controlling, when in conflict with a Note.
Practical application. For example, Chapter 39 Note 2(a) excludes certain textile articles from heading 39.26, even if the heading text appears broad enough to include them. Section XVI Note 1 excludes most railway and tramway goods from machinery Chapters 84 and 85. Such Notes are to be actively cited in every NCM research and, failing to do so, exposes the importer to misclassification penalties regardless of good faith or reliance on previous rulings. Practitioners should verify the full Note text in the NCM/TIPI book or Sistema Classif for the current effective date on each entry.
Updates and official publication. All effective Section and Chapter Notes for Brazil are published in the TIPI Decree (currently Decree 11.158/2022), the CAMEX NCM Resolutions, and appear verbatim in the Sistema Classif portal for every relevant Section and Chapter. Amendments from MERCOSUR/HS or Brazilian law take effect only from the date of official publication; retroactive enforcement of new/modified Notes is not permitted absent explicit statutory language.
Source: Decreto 11.158/2022 (TIPI 2022); Sistema Classif — RFB
Classification of Retail Sets (“Conjuntos”) and Composite Goods — GRI 3(b) Practice in Brazil
Retail sets (conjuntos) and composite goods are a perennial classification minefield under Brazil’s Nomenclatura Comum do Mercosul (NCM), with both RFB auditors and CARF judges focusing on their handling under General Rule of Interpretation (GRI) 3(b). GRI 3(b), incorporated into Brazilian law through Annex to Decreto 11.158/2022 (TIPI) and adopted by reference in the NCM, provides: “mixtures, composite goods consisting of different materials or made up of different components, and goods put up in sets for retail sale, which cannot be classified by reference to Rule 3(a), shall be classified as if they consisted of the material or component which gives them their essential character.”
As explained by the official Notas Explicativas do Sistema Harmonizado (NESH), published in RFB’s Sistema Classif, a “conjunto” (retail set) for GRI 3(b) must: (1) consist of at least two different articles classifiable under distinct NCM headings; (2) be put up together to meet a specific need or carry out a specific activity (e.g., manicure kits, cheese-and-wine baskets, tool sets); and (3) be packaged for direct retail sale to the user without repacking. Where no component imparts a clear essential character—because the combined items serve fully equal roles or there is no dominant value—classification defaults to GRI 3(c): the heading last in numerical order among those meriting equal consideration (TIPI, GRI 3(c)). Composite goods are likewise assessed for “essential character” using factors described in the NESH: nature, bulk, value, the role in use, or consumer perception.
CARF’s Acórdão 3302-006.936/2023 upheld a penalty where the importer failed to substantiate its “essential character” claim with technical documentation and the RFB concluded the imported kit (a combination medical diagnostic set) should have been classified under the heading for the article providing principal function to the user, not by value alone. The acórdão held: “o contribuinte deve comprovar documentalmente diante da fiscalização que o elemento alegado como caracterizador da essência do conjunto realmente determina a função principal, conforme entendimento da RFB e das Notas Explicativas.” (“The taxpayer must document for RFB that what is alleged as imparting essential character actually defines the set’s principal function, as per RFB and the Explanatory Notes.”)
Common pitfalls flagged by RFB and TIPI guidance:
- Sets of unrelated items packed jointly for logistics or marketing (e.g., promotional bundles) do not generally qualify as conjuntos unless the goods are put up for a specific joint use (NESH examples, Sistema Classif).
- Importers often rely on value or quantity alone; RFB audits require analysis of function and consumer perception, as noted in CARF 3302-006.936/2023.
- Errors in applying GRI 3(b)—such as omission of essential character analysis or failure to document technical basis—trigger the strict Article 711 penalty (1% of customs value), as stipulated by Decreto 6.759/2009.
Best practice: always attach technical descriptions, catalogues, and statutory or NESH excerpts to SISCOMEX declarations or consultas involving retail sets and composite goods. Consult Classif for GRI and NESH text in force on the date of entry, and cite any relevant published RFB Solução de Consulta or CARF acórdão for the merchandise type.
Source: Decreto 11.158/2022 (TIPI 2022); Sistema Classif — RFB, NESH on conjuntos; Compêndio Ceclam — Receita Federal; Decreto 6.759/2009, Art. 711
Administrative Appeal of Tariff Classification and Penalties: DRJ and CARF Procedure (2026 Updates)
The administrative appeal process for tariff classification decisions and penalties in Brazil is governed primarily by Decreto 70.235/1972 (Processo Administrativo Fiscal, or PAF), but the procedural landscape was substantively amended in 2025–2026 by new Receita Federal and CARF rules. Practitioners should now account for the following material updates:
1. DRJ (Delegacia da Receita Federal de Julgamento) – Monetary Thresholds and Procedure:
- Portaria RFB No. 602/2025 (effective January 1, 2026) instituted major reforms to the organization and procedures of the DRJ. The monetary threshold for monocratic (single-judge) decisions on administrative tax appeals was reduced to 60 minimum wages (salários mínimos; previously 1,000). Above this threshold, appeals are heard by panel.
- Portaria 602/2025 also requires all DRJ rulings to conform to binding CARF jurisprudential summaries (súmulas vinculantes). DRJ judges risk loss of mandate for inconsistent decisions.
- The Portaria clarifies and harmonizes timelines, document standards, and notice requirements across ordinary and appellate DRJ panels, formalizing e-CAC/e-Processo digital platforms as mandatory for all PAF submissions and notifications.
2. CARF (Conselho Administrativo de Recursos Fiscais) – Altered Deadlines and Compliance:
- Complementary Law (Lei Complementar) No. 227/2026 and subsequent revisions in CARF Internal Regulation (May 2026) implemented changed procedural deadlines:
- Embargos de declaração (motions to clarify): 5 business days (previously 10)
- Agravo and other interlocutory appeals: 5 business days
- Recurso voluntário (voluntary appeal) to CARF: 20 calendar days from notification of DRJ decision (unchanged, but enforcement strictness increased)
- Panels are obliged to cite or distinguish prior CARF súmulas/vinculantes for all classification/penalty cases. Consistency in reasoning is now more closely monitored by CARF’s Corregedoria.
Summary of appeal steps with new rules:
- Upon receipt of an Auto de Infração (infraction notice), the importer files an impugnação (defense) within 30 days (unchanged), digitally via e-CAC/e-Processo. Enforcement is suspended pending DRJ decision.
- DRJ rules, now under lower monetary thresholds, must apply CARF’s binding jurisprudence.
- Unfavorable DRJ decisions may be appealed to CARF within 20 days. Motions to clarify (embargos) or interlocutory appeals (agravos) are due 5 business days from decision notification.
- CARF reviews both law and fact, with composition, voting, and reasoning standards as updated in the revised Internal Regulation (May 2026).
- After exhausted administrative routes, judicial review remains available under prior rules, except for any new procedural requirements that may be specified by future Receita Federal circulars.
Effective dates and practitioner alert: The amendments of Portaria 602/2025 are fully effective on January 1, 2026. The CARF internal rules as revised in May 2026 are already in force. All practitioners should ensure administrative filings after these dates comply with new deadlines and citation mandates to avoid dismissal or loss of appeal rights.
Source: Decreto 70.235/1972 (Processo Administrativo Fiscal, base law); Portaria RFB No. 602/2025 (DRJ organizational/procedural reforms); Lei Complementar nº 227/2026 (CARF procedures); CARF: Institutional page (revised May 2026 rules).
NCM Amendments: Retroactivity, Effective Date, and Treatment of Past Imports
Brazil’s Nomenclatura Comum do Mercosul (NCM) is updated regularly to reflect changes from the HS Convention, MERCOSUR decisions (GMC/CCM), and CAMEX/GECEX resolutions. The question for practitioners: When is a new or amended NCM code, Note, Ditame, or legal interpretation applicable to imports? Does a new classification apply retroactively to prior clearances or only prospectively from its effective date?
Legal Framework — Prospective Application Principle Brazilian customs law follows the general legal-security principle of prospective application for NCM amendments. Changes to the NCM (heading, notes, Ex-tarifário/NC, Ditames) take effect only from the official effective date stated in the implementing regulation — typically a CAMEX or GECEX resolution, or, for Ditames, the Ato Declaratório Executivo of Receita Federal. This is anchored in Decreto 6.759/2009 (Customs Regulation) Art. 99, which states that acts or situations preceding the entry into force of a new legal provision are governed by the rules in effect at the time they occurred, unless stated otherwise by express retroactive provision in the new act. Likewise, in tax matters, Article 144 of the National Tax Code (Código Tributário Nacional, CTN) stipulates the rule of non-retroactivity of tax-law changes.
For NCM amendments and newly published Ditames, the Receita Federal’s standard practice, consistent with Art. 99 and Art. 144 CTN, is to apply the new code/version only to import declarations registered in SISCOMEX on or after the official effective date. Any classification, duty rates, or administrative requirements (licensing, health control, Ex-tarifário) associated with the new code apply only to those forward-looking entries. Past imports are not reclassified solely because an NCM code or Ditame has changed.
Transitional Periods and Exceptional Cases Occasionally, an implementing act (e.g., a CAMEX or GECEX resolution) will include a transitional or grace period, especially after major NCM structural revisions (such as HS-to-HS transition years). During such periods, both the old and new NCM code may be accepted for declarations of goods shipped under contract prior to the effective date, or for goods in transit, provided the import declaration references the relevant date (per guidance in Sistema Classif or Receita Federal circulars). These transitional rules are expressly published in the CAMEX/GECEX act or Receita guidance; absent such express provision, the standard rule is strict prospectivity.
Effect of Amendments on Penalty/Dispute Cases For audit and penalty purposes, Receita Federal and CARF apply the NCM, Notes, and Ditames in force on the date of customs registration (registro da declaração de importação) or the date of the infraction/assessment, not the current table. The Classif system’s historical module is routinely cited as official proof of code and description in force on a specific date. Post-entry audits and disputes about past imports are determined by the NCM legal text applicable on the entry date—unless the amending act expressly states otherwise (rare).
Retroactivity by Express Provision (Very Rare) If, in rare instances, a GECEX/CAMEX resolution or Receita Federal act expressly states retroactive application—e.g., to resolve a known systemic classification error or for public-interest reasons—then that retroactivity is valid only within the limits stated. In practice, most NCM changes and Ditames do not retroact.
Best Practice Always verify the effective date in the official publishing act or in Sistema Classif’s history module. Defend against any retroactive reclassification (for penalty or licensing disputes) by citing Art. 99 of the Customs Regulation and historical Classif extracts.
Source: Decreto 6.759/2009, Art. 99; CTN, Art. 144; Sistema Classif — RFB, historical NCM function
Subheading Notes (Notas de Subposição) and their Role in NCM Classification
Subheading Notes (Notas de Subposição) are legally binding interpretive provisions appended to specific six-digit subheadings within Brazil’s Nomenclatura Comum do Mercosul (NCM). Under the General Rules for the Interpretation of the Harmonized System (GRI), once the classifier identifies the correct four-digit heading using GRI 1–5, classification advances to the subheading (6-digit) level by applying the text of each subheading and any related Subheading Notes. This sequence is mandated by GRI 6, as codified in the Annex to Decree 11.158/2022 (TIPI): "the classification of goods in the subheadings of a heading shall be determined according to the terms of those subheadings, any related Subheading Notes, and, mutatis mutandis, to the above rules, on the understanding that only subheadings at the same level are comparable."
Legal force and interpretive hierarchy Subheading Notes published in TIPI and in the official NCM structure—as consolidated by CAMEX/GECEX resolutions—are binding legal text. Both Receita Federal do Brasil (RFB) and the administrative tax court (CARF) have treated disregard or omission of a directly applicable Subheading Note as a legal error. In practice, the interpretive hierarchy requires that Section Notes, Chapter Notes, and Subheading Notes included in TIPI/Annex are applied in the order of their scope, before consulting Explanatory Notes (NESH), WCO Opinions, or Merecosur Ditames. While not explicitly ranked in statutory language, these various Notes are referenced in TIPI as part of the operative legal text, and failure to observe them at any given step renders the classification ineligible for support by subsidiary authority.
Item and subitem descriptions (7th and 8th digits) After application of Subheading Notes, the classifier moves to select the item (7th digit) and subitem (8th digit) within Brazil’s NCM. The specific wording of these individual lines—published in the official TIPI table and in the Sistema Classif portal—constitutes binding regulatory text for customs and tax purposes. If the item/subitem is titled merely “Outros” (Other), the broader description at subheading or heading level governs, unless further qualified elsewhere in Annex or Note.
Relation to penalties and compliance While Article 711 of Decree 6.759/2009 establishes a penalty for incorrect NCM classification more broadly, it does not single out Subheading Notes. However, RFB and CARF decisions regularly affirm that omission of a binding Note—when determinative—is classed as misclassification for penalty purposes, subject to the provisions of Article 711 if an incorrect NCM is declared.
Practical documentation The Sistema Classif portal (https://portalunico.siscomex.gov.br/classif/) publishes the operative text of all Section, Chapter, and Subheading Notes in force for every relevant NCM code, and these should be consulted prior to classification or when contesting an RFB determination.
Source: Decreto 11.158/2022 (TIPI 2022); Sistema Classif — Receita Federal