HS Code Classification: How to Classify Goods Correctly for Vietnam Customs

The HS code decides how much duty you pay, whether you need a licence or specialised inspection, which rule of origin applies to your C/O and which statistics your shipment counts towards. Classification errors are among the most frequent findings in post-clearance audits in Vietnam, and they can be expensive years after the goods have been sold. This guide explains how the system is structured, how the six General Interpretative Rules work, a practical method for classifying a product and how to obtain an advance ruling from Vietnam Customs.

Structure of the Harmonized System

The Harmonized Commodity Description and Coding System (HS) is maintained by the World Customs Organization (WCO) and used by most countries in the world. It is revised roughly every five years; the edition in force is HS 2022. The first six digits are internationally harmonised, and countries add further digits for their national tariff.

The HS has 21 sections and 97 chapters (chapter 77 is reserved for future use), about 1,200 headings and roughly 5,600 six-digit subheadings. Vietnam’s Nomenclature of Imported and Exported Goods is based on the ASEAN Harmonised Tariff Nomenclature (AHTN), which adds two digits for ASEAN-wide 8-digit lines. Every customs declaration in Vietnam must show the 8-digit code.

Legally binding texts are the headings, the section and chapter notes and the subheading notes. The WCO Explanatory Notes and the AHTN supplementary explanatory notes are not law in the strict sense, but customs authorities rely on them heavily and they are the best guide to the scope of each heading.

The six General Interpretative Rules (GIR)

1. GIR 1: section and chapter titles are for reference only. Classification is determined by the terms of the headings and any relevant section or chapter notes. Most goods are classified by GIR 1 alone.
2. GIR 2: (a) an incomplete, unfinished, unassembled or disassembled article is classified as the complete article if it has the essential character of the finished product; (b) a reference to a material includes mixtures and combinations of that material with others, which are then classified under GIR 3.
3. GIR 3: when goods are prima facie classifiable under two or more headings, (a) the most specific description wins; (b) mixtures, composite goods and sets put up for retail sale are classified by the component that gives them their essential character; (c) if neither works, the heading that occurs last in numerical order applies.
4. GIR 4: goods that cannot be classified by the rules above go to the heading for the goods to which they are most akin.
5. GIR 5: (a) cases and containers specially shaped for a specific article, suitable for long-term use and presented with it, such as camera cases or instrument cases, are classified with the article; (b) packing materials and containers normally used for the goods are classified with them, unless clearly suitable for repeated use.
6. GIR 6: classification at subheading level follows the terms of the subheadings and subheading notes, applying rules 1 to 5 mutatis mutandis, and only subheadings at the same level can be compared.

Apply the rules in order. GIR 3 and GIR 4 are only used when GIR 1 and the notes do not give an answer; jumping straight to essential character is one of the most common mistakes.

A practical classification method

1. Describe the product precisely: what it is, what it is made of, how it works, what it is used for, how it is presented (retail set, bulk, parts) and its technical specifications. Collect catalogues, drawings, material composition and photographs.
2. Identify candidate sections and chapters, then read the section and chapter notes, especially exclusion notes, before looking at headings.
3. Select the heading using GIR 1, and only move to GIR 2 to 4 where necessary.
4. Select the six-digit subheading using GIR 6, comparing only subheadings at the same level.
5. Select the eight-digit Vietnamese line in the current nomenclature.
6. Cross-check: WCO classification opinions, AHTN notes, Vietnam Customs classification notices and rulings on similar goods, and the code used by the supplier or by your customs broker in previous shipments.
7. Document your reasoning in a classification file for each product; it is your evidence in a post-clearance audit.

Example

Bluetooth earbuds with a charging case: Section XVI, chapter 85; heading 85.18 covers headphones and earphones; subheading 8518.30 covers headphones and earphones, whether or not combined with a microphone. The charging case is specially shaped and presented with the earbuds, so it follows the main article. The final eight-digit line is then chosen from the national nomenclature. If the product also had significant additional functions, such as a built-in music player, the notes to chapter 85 and GIR 3 would need to be considered.

Advance rulings in Vietnam

Under the Customs Law and its implementing decrees and circulars, an organisation or individual can request an advance ruling on classification, origin or valuation method before importing or exporting. For classification, the applicant submits a request form, a description of the goods, technical documents and, where needed, a sample to the customs authority, generally at least 60 days before the goods are declared. Vietnam Customs reviews the request and issues a ruling, normally within 30 days of receiving a complete file, which may be extended for complex cases. A ruling is typically valid for up to three years, provided the goods and the legal basis do not change.

Advance rulings are worth considering for new products, high-value product lines, goods where customs and suppliers disagree, and items with a large duty difference between two possible headings. A ruling gives certainty for clearance and protects against reclassification in later audits for the goods it covers.

Consequences of wrong classification

• Tax arrears: underpaid import duty, VAT, excise or environmental tax must be paid with late payment interest, currently 0.03 percent per day under the Tax Administration Law.
• Administrative penalties: incorrect declarations leading to a tax shortfall are usually fined as a percentage of the shortfall, and deliberate misdeclaration can be treated as tax evasion with much heavier penalties.
• Loss of FTA preference: a C/O showing a different HS code from the declaration, or a product-specific rule that does not match, can invalidate preferential treatment.
• Missed controls: the wrong code may hide a licence or specialised inspection requirement, causing goods to be held at the port.
• Overpayment: classifying under a heading with a higher rate simply wastes money, and refunds take time.
• Higher risk profile: repeated errors push a company into more yellow and red channel inspections.

If you discover an error after clearance, voluntary amendment within the period allowed by law, before customs starts an audit, generally avoids penalties for incorrect declaration, although the tax difference and late payment interest still apply.

How to look up tariffs and import requirements

Once you have the eight-digit code, check the preferential (MFN) import tariff and the special preferential tariffs under each FTA, both issued by government decree; the VAT rate; excise tax, environmental protection tax and any trade remedy duties; and lists of goods subject to licences, specialised inspection or import conditions, which ministries publish by HS code. The Vietnam Customs portal and the National Single Window provide lookup tools, and GLG’s customs brokerage team maintains classification files for regular importers.

Frequently asked questions

How many digits does a Vietnamese HS code have?

Eight. The first six follow the international HS, and the last two are AHTN lines shared across ASEAN and used in Vietnam’s nomenclature.

Can I use my supplier’s HS code?

You can use it as a reference, but the importer is responsible for the code declared in Vietnam, and the exporting country’s national digits often differ.

How long is an advance ruling valid?

Generally up to three years, as long as the goods, their documentation and the relevant legal provisions remain unchanged.

What happens if customs disagrees with my classification?

Customs can reclassify the goods, collect any tax difference with late payment interest and impose penalties; you can submit explanations, technical evidence or appeal the decision.

This content is for general guidance and does not replace legal or banking advice for a specific transaction.