An HS code should not be selected by entering a commercial name into a tariff and choosing the line with the lowest duty. For machinery, electrical or electronic components, multifunction equipment and disassembled sets, a change in construction, material, principal function or condition as imported may move the goods to a different Chapter or heading. Copying a supplier’s code without reading the Section and Chapter Notes and the six General Rules for Interpretation can produce incorrect duty, origin, licensing and specialised-inspection treatment. This article explains the controlled path from objective technical facts to Vietnam’s eight-digit code, the evidence required and when advance classification should be considered.

QUICK FACTS

Classification starts with objective facts

Construction, material, composition, function and condition at declaration outweigh marketing terminology.

Start with GIR 1

GIR 1 is the starting point, but the six rules are not a mechanical checklist. GIRs 2–5 apply only when the condition of the goods or competing headings triggers the requirements of the relevant rule; GIR 6 applies after the heading is fixed, at the same subheading level.

An overseas code is not automatically Vietnamese

The HS has a six-digit core, while Vietnam applies eight-digit AHTN/national lines.

Tax and policy follow the code

Duty, origin and sectoral lists must not be used to reverse-engineer a convenient classification.

SCOPE OF APPLICATION

This article applies to commercial exports and imports by sea, air, road and multimodal transport, with emphasis on industrial machinery, electrical/electronic components, functional modules, parts, retail sets and machinery imported unassembled or disassembled.

It explains principles and controls rather than assigning a final code without the actual model, catalogue, BOM, composition, images and condition of the goods. Chemicals, pharmaceuticals, food, textiles, vehicles, defence goods and other specialised sectors require additional product-specific sources.

TERMS AND DEFINITIONS

Term	Meaning	Operational role
HS Code	A commodity classification code under the Harmonized Commodity Description and Coding System.	It supports tariff, regulatory and statistical treatment; Vietnam declares goods under the national export-import nomenclature.
GIR – General Interpretative Rules	Six rules governing classification in the HS.	GIR 1 is the starting point. GIRs 2–5 apply when their specific conditions are triggered; GIR 6 selects among same-level subheadings after the heading has been determined.
Legal Notes	Section, Chapter and Subheading Notes in the nomenclature.	They have direct legal effect in defining inclusions, exclusions and priority.
Heading / Subheading	A four-digit heading and a six-digit HS subheading.	After the heading is selected, classification proceeds through same-level subheadings to Vietnam’s eight-digit AHTN line.
Explanatory Notes	Detailed HS interpretation published by the WCO.	An important aid, but not a substitute for heading text, Legal Notes and the GIRs.
Classification Opinion	A WCO opinion for a particular commodity.	A reference when the goods are technically comparable.
Essential Character	The feature giving a mixture, composite good or set its fundamental identity.	Considered under GIR 3(b), based on material, component, function, value, weight or role, depending on the goods.
Advance classification	A procedure requesting Customs to determine a code before customs clearance of the actual goods.	Useful for complex, high-value, recurring goods or goods with major regulatory impact.

NATURE AND CLASSIFICATION MECHANISM

HS classification is a legal reasoning process based on the objective identity and condition of the goods at the time of declaration. The analysis moves from technical facts to heading text, Legal Notes, the GIRs and same-level subheadings. It must not work backwards from a preferred duty rate or licence outcome.

The HS has an international six-digit core. Vietnam uses eight-digit lines under AHTN and the national export-import nomenclature. A supplier’s overseas code may help shortlist headings but is not automatically the Vietnamese declaration code.

ONE PRODUCT – ONE CODE: In principle, a specific product is assigned one code in Vietnam’s List of Exported and Imported Goods; Circular 85/2026/TT-BTC restates this principle from 15 September 2026. A change in model, construction, material, function, degree of completion or condition at declaration may, however, create a different classification case. A code used for an earlier shipment should not be reused automatically when the technical facts have changed.

Control point: the conclusion should state the condition of the goods, technical-document version, legal notes/rules applied and any assumptions that still depend on the actual file.

DECISION HIERARCHY

Analysis layer	What to review	Control significance
1. Actual goods	Construction, material, composition, function, operating principle, degree of completion and condition at declaration.	Incorrect facts undermine the entire classification conclusion.
2. Heading text and Legal Notes	Read heading descriptions and Section/Chapter/Subheading Notes, including exclusions.	This is the first legal layer under GIR 1.
3. Six GIRs	Read GIR 1 first; then apply GIRs 2–5 according to the condition of the goods and the relationship between candidate headings. GIR 6 operates at subheading level.	Do not choose a rule at discretion or treat the GIRs as a sequence that must always be completed.
4. Same-level subheadings	After the four-digit heading is fixed, use GIR 6 to reach the six-digit and Vietnamese eight-digit line.	Only subheadings at the same level are comparable.
5. Interpretative tools	HS Explanatory Notes, WCO Classification Opinions, AHTN Supplementary Notes, Customs databases and comparable rulings.	They reinforce reasoning but do not replace the legal text.
6. Policy and tax	Check duty, licences, specialised inspection, origin and preference only after classification.	A desired tariff rate must not drive classification backwards.

SIX GENERAL RULES FOR INTERPRETATION

Rule	Core principle	Typical use	Error to avoid
GIR 1	Classification follows heading terms and Section/Chapter Notes; section and chapter titles are for reference only.	Most cases start and may end here.	Keyword matching a commercial name without reading Legal Notes.
GIR 2(a)	Incomplete or unfinished goods having the essential character of the complete good, and complete goods presented unassembled or disassembled.	Machinery split for packing/transport; goods missing minor parts but already having the complete identity.	Treating all loose components as complete machinery, or all disassembled machinery as parts.
GIR 2(b)	A reference to a material includes mixtures or combinations; if several headings are prima facie applicable, proceed to Rule 3.	Blended materials and goods made of several substances.	Selecting only the largest material share without considering heading rules.
GIR 3(a)	The most specific description prevails over a more general description.	Two or more headings appear applicable.	Assuming the longest description is automatically the most specific.
GIR 3(b)	Mixtures, composite goods and retail sets are classified by the component giving essential character.	Tool sets, retail sets and multi-component goods.	Automatically selecting the highest-value component.
GIR 3(c)	If 3(a) and 3(b) do not resolve the case, select the heading occurring last in numerical order among equally meriting headings.	A remaining tie between candidate headings.	Using 3(c) before completing 3(a) and 3(b).
GIR 4	Goods not classifiable under Rules 1–3 are classified with the goods to which they are most akin.	Novel or unusual goods; rarely required.	Using similarity too early instead of legal analysis.
GIR 5	Rules for specially shaped durable cases and ordinary packing materials/containers, subject to conditions.	Instrument cases, fitted containers and normal packaging.	Always classifying reusable packaging with the goods.
GIR 6	Subheading classification follows subheading terms and notes, applying Rules 1–5 mutatis mutandis and comparing only the same level.	Moving from a four-digit heading to six- and eight-digit lines.	Comparing one-dash and two-dash subheadings directly or ignoring subheading notes.

GOODS REQUIRING SPECIAL ANALYSIS

Goods group	Decisive data	Classification control
Unassembled/disassembled machinery	Component list, assembly drawing, package mapping, import timing and reason for disassembly.	Assess GIR 2(a). Where machinery or equipment falls within a case involving one or multiple sources, multiple shipments or customs procedures at different customs units, also review the machinery-list registration and deduction-monitoring mechanism applicable at the time of import. From 15 September 2026, review Articles 7–9 of Circular 85/2026; lists registered before that date continue under the transitional rule until all goods on the list have been imported.
Machine combinations or functional units	Line layout, process flow, common function, interconnections and role of each module.	Do not automatically classify every machine separately; review Chapter 84/85 Notes and relevant provisions.
Parts and accessories	Dedicated design, independent use, own heading and exclusion notes.	A component used for a machine is not automatically classified as a “part”. A specific heading or Legal Note may prevail.
Multi-function equipment	Principal and ancillary functions, configuration as imported, technical data and actual use.	Apply Legal Notes, principal function or the appropriate GIR; marketing claims are not decisive.
Retail sets	Different articles, put up together for a specific need/activity and packaged for direct retail sale.	GIR 3(b) applies only if the set conditions are met.
Mixtures and blended materials	Composition percentage, physical/chemical properties, use and production process.	GIR 2(b), Rule 3 and product-specific notes may determine classification.
Accessories, consumables and software	Whether packed with equipment, necessary for operation, separately classifiable, and whether software is on a physical medium or licensed separately.	Do not combine merely because items share a contract; classify the goods as presented and under the relevant headings.

DOCUMENTS AND DATA TO REVIEW

Document/data	Prepared by	Fields to review	Use in process
Catalogue / datasheet	Manufacturer or owner	Technical name, model, construction, parameters, function and operating principle.	Identifies the goods and tests heading descriptions.
Drawings, diagrams and BOM	Engineering/manufacturer	Structure, modules, materials, quantity of components and assembly relationship.	Supports disassembled machinery, parts and functional units.
COA/SDS/composition statement	Manufacturer/laboratory	Substance percentages, properties and standards.	Supports chemicals, plastics, food and mixed materials.
Photos, labels and nameplates	Warehouse/manufacturer	Model, serial, power, voltage and assembly condition.	Connects the physical goods with documents.
Process and use description	Engineering/production	Inputs, outputs, main function and operating environment.	Distinguishes specialised, multifunctional and functional-unit machinery.
Invoice, Packing List, contract and transport document	Trading/transport parties	Commercial name, quantity, packing condition, model and shipment identity.	Links the classification to declaration documents; insufficient by itself to fix a code.
Sectoral regulatory list	Regulatory authority	Product scope, licence/inspection conditions and reference codes.	Used after classification for policy review; a conflict with the Vietnam Nomenclature is handled under customs law.
Prior classification / advance ruling file	Company/Customs	Sample, technical version, reasoning and result.	Reuse only when the goods and legal basis remain unchanged.

HS CLASSIFICATION PROCESS

Step	Input	Action	Output
1. Lock the condition at declaration	Sample or complete product description.	Determine whether the goods are complete, incomplete, unassembled, a set or individual components.	Version-controlled technical description.
2. Collect objective facts	Catalogue, BOM, composition, images and use.	Remove marketing labels; confirm construction, material, function and operation.	Classification fact sheet.
3. Shortlist headings	Vietnam Nomenclature and technical search terms.	Find headings by function/material without fixing the final code.	Candidate-heading list.
4. Read Legal Notes and exclusions	Section, Chapter and Subheading Notes.	Eliminate invalid headings and identify special machinery, parts, mixtures or set rules.	Remaining legally viable headings.
5. Apply GIRs sequentially	Candidate headings and facts.	Start with GIR 1; review GIRs 2–5 when the conditions of a particular rule are triggered. After fixing the heading, use GIR 6 to compare same-level subheadings.	Reasoned heading selection.
6. Descend through same-level subheadings	Selected four-digit heading.	Use GIR 6, subheading wording and notes to reach the six/eight-digit line.	Proposed code and standard description.
7. Cross-check interpretative tools	HS Notes, WCO opinions, AHTN and Customs database.	Test consistency and record the source and degree of comparability.	Evidence file.
8. Review policy after classification	Proposed code.	Check duty, origin, licences, specialised inspection, labelling and restrictions.	Policy/tax matrix.
9. Approve or seek advance classification	Complete file and risk assessment.	Obtain internal approval; consider advance classification for complex or recurring goods.	Accountable conclusion and audit trail.

RISKS AND COMMON ERRORS

Error	Cause	Impact	Control
Generic commercial description	“Accessory”, “machine” or “module” does not identify the goods.	Wrong Chapter/heading and additional-document requests.	Standardise the technical description before declaration.
Copying the supplier’s code	The export-country code may use different national digits or facts.	Incorrect Vietnamese eight-digit code.	Use only as a reference and reclassify under Vietnam’s nomenclature.
Selecting the lowest duty rate	The process starts from a desired outcome rather than the goods.	Potential reassessment, arrears, late-payment interest or penalties depending on the file.	Separate classification from tax calculation.
Ignoring Section/Chapter Notes	Only tariff keywords are searched.	Exclusions and priority rules are missed.	Cite relevant Notes in the classification memo.
All components treated as parts	No review of specific headings or independent function.	Wrong heading even when dedicated to a machine.	Check own headings and parts notes first.
Disassembled machinery declared as separate parts	No package mapping/drawing and no GIR 2(a) analysis.	Code and regulatory treatment may be wrong.	Prepare a synchronized list, assembly drawing and import timeline.
Every shipment treated as a set	Items share a contract or container only.	GIR 3(b) applied without the set conditions.	Test the retail-set criteria and condition as imported.
Sectoral code treated as final	A policy reference code is confused with customs classification.	Conflict with the Vietnam Nomenclature.	Classify under customs law first, then review policy.
Old code reused after model change	Catalogue/BOM version is not controlled.	The old code no longer reflects construction or function.	Trigger review when model, material, power or configuration changes.
No classification reasoning retained	Only the final code is recorded.	Weak explanation during post-clearance audit.	Retain the memo, technical evidence, version and approver.

LEGAL BASIS AND OFFICIAL SOURCES

Instrument/source	Authority	Status	Relevance
Customs Law 54/2014/QH13	National Assembly	Effective 1 January 2015; amended	Article 26 establishes classification based on the customs dossier, technical documents and relevant information to determine the name and code.
Law 90/2025/QH15	National Assembly	Effective 1 July 2025	Amends provisions of the Customs Law and the Law on Export and Import Duties.
Decree 08/2015/NĐ-CP and Decree 167/2025/NĐ-CP	Government	Applicable within the amended scope	Detailed rules on customs procedures, classification and advance classification.
Circular 31/2022/TT-BTC	Ministry of Finance	The circular states an effective date of 1 December 2022; implementation was suspended through 29 December 2022 by Circular 72/2022, so the nomenclature applied from 30 December 2022.	Promulgates Vietnam’s List of Exported and Imported Goods based on AHTN 2022.
Circular 72/2022/TT-BTC	Ministry of Finance	Effective 1 December 2022	Suspended Circular 31/2022 through 29 December 2022, clarifying the practical start date of the AHTN 2022 nomenclature.
Circulars 14/2015/TT-BTC and 17/2021/TT-BTC	Ministry of Finance	Applicable through 14 September 2026	Current framework for classification and analysis for classification.
Circular 85/2026/TT-BTC	Ministry of Finance	Not yet effective on the review date of 20 July 2026; effective from 15 September 2026.	Replaces Circulars 14/2015 and 17/2021; updates classification principles, information sources and machinery provisions. Machinery lists registered before 15 September 2026 continue under the transitional rule until all listed goods are imported.
HS Convention, GIRs and WCO tools	World Customs Organization	International HS source	Provides the six-digit structure, GIRs, Explanatory Notes and Classification Opinions supporting consistent interpretation.

Customs Law 54/2014 Law 90/2025 Decree 167/2025 Circular 31/2022 Circular 14/2015 Circular 17/2021 Circular 85/2026 WCO – GIRs WCO – Explanatory Notes Advance classification service Circular 72/2022

Source review date: 20 July 2026. This English version is for operational reference and is not an official legal translation or a binding Customs classification.

FAQ

1. Does the same product name always have the same HS code?

No. A commercial name may cover different constructions, materials, capacities and functions. Classification must use the actual model and its technical evidence.

2. Can the supplier’s overseas HS code be used unchanged?

It is only a reference. The international six-digit core is shared, but national eight- or ten-digit subdivisions, facts and application practice may differ.

3. Which GIR is applied first?

Start with GIR 1. GIRs 2–5 are not steps that must always be followed in sequence; they apply only when the condition of the goods or competing headings meets the requirements of the relevant rule. GIR 6 applies after the heading is fixed, at the same subheading level.

4. Is a component used only for one machine always classified as a part?

No. Check whether it has its own heading, relevant exclusions, independent function and the specific Notes of the Chapter.

5. Can machinery imported in several packages use the complete-machine code?

Potentially, if GIR 2(a) is satisfied and the evidence shows that the packages form a complete machine or already have its essential character. Where imports involve multiple sources, shipments or customs units, the applicable machinery-list and deduction-monitoring mechanism must also be reviewed; a common contract alone is insufficient.

6. Can HS codes differ between countries?

The international six-digit foundation is generally shared, but countries may add subdivisions. Differences can also arise from the goods’ condition, specifications, evidence or rule application.

7. When should advance classification be considered?

For complex, high-value or recurring goods, multi-module production lines, or where classification materially changes duty and regulatory treatment. The application must describe the intended goods accurately.

APPLICATION NOTE: The final HS code depends on the exact goods, technical version and law in force on the declaration date. As of 20 July 2026, Circulars 14/2015/TT-BTC and 17/2021/TT-BTC remain applicable through 14 September 2026. Circular 85/2026/TT-BTC takes effect on 15 September 2026 and replaces them. Re-check any declaration registered after the transition date.

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