How to Classify a Product: A Step-by-Step Guide to Find the Right HS Code 

A business involved in international trade needs to classify a product correctly under the Harmonized System (HS). The classification determines how customs authorities treat the finished good, including applicable duties, taxes, trade measures, and other requirements. Finding the right HS code requires more than searching for a product name. Material, function, composition, technical specifications, form, and intended use can affect classification. Knowing how to find an HS code for an article is important because the right classification depends on understanding the item, applying the relevant classification rules, and checking the code carefully before using it for an import or export transaction.

Understanding how to classify a product correctly is important for accurate customs declarations and compliance.

What is an HS Code? 

An HS code is a standardized six-digit numerical code used to classify traded products under the Harmonized System. It provides a common basis for identifying goods in international trade and determining their tariff classification across participating countries.

• WCO, or the World Customs Organization, develops and maintains the Harmonized System.

• The system organizes traded goods into more than 5,000 commodity groups.

• Each commodity group is identified using a six-digit HS code.

• More than 200 countries and economies use the Harmonized System.

• Countries can add digits to meet their own tariff and statistical requirements.

• The United States uses the Harmonized Tariff Schedule for imported goods.

• Schedule B is used for export classification in the United States.

• The six-digit HS code may not be the final classification required.

Why is Product Classification Important? 

Product classification is important because it determines how customs authorities apply tariffs and other trade requirements to a product. Classifying correctly helps businesses establish the applicable duty and tax treatment before completing an import or export transaction.

• The classification can determine whether additional duties or trade-defense measures apply.

• An incorrect code can lead to customs questions or shipment delays.

• Misclassification can result in incorrect duty or tax calculations.

• Businesses may face additional compliance work when classification errors are identified.

• Incorrect classification can create unexpected import costs.

• Customs authorities may challenge a classification and require reclassification.

• Consistent classification helps businesses apply the same treatment to similar products.

• Companies managing large product catalogs may need to maintain classification information across multiple sources.

• Product classification requires ongoing review when products or tariff requirements change.

What Information Do You Need to Classify a Product? 

To begin HS code classification, gather as much relevant product information as possible. Starting with an incomplete item description can make classification difficult because names such as “industrial pump,” “smart watch,” “plastic container,” or “electronic device” may not provide enough information to determine the appropriate classification.

1. Product Description

For classifying an article, a clear description should state what it actually is, rather than using only its marketing name or internal SKU. For example, “ProClean 500” could be described as an “electric-powered floor-cleaning machine designed for commercial use.” The description should convey its physical identity and purpose.

2. Material and Composition

To classify a product, the materials and composition of an item can affect its classification. This can happen particularly when it could potentially fall under classifications associated with different materials.

Depending on the item, useful information may include:

• Primary material

• Any secondary materials

• The percentage of each material

• Chemical composition

• The product’s construction

• Any coatings or treatments

• Whether the item contains multiple materials

3. Function and Intended Use

For product classification, it is important to understand what the item does and what it is designed to be used for. Its function can be a critical factor in determining its classification, particularly when similar-looking products serve different purposes.

• What does the product do?

• What is the article designed to be used for?

4. Technical Specifications

One should know technical specifications to distinguish between otherwise similar goods while classifying, especially when their physical appearance or commercial descriptions do not clearly indicate the appropriate classification.

Considering the item, useful information may include:

• Dimensions

• Capacity

• Power rating

• Voltage

• Operating characteristics

• Performance specifications

• Manufacturing method

• Components

• Technical drawings

When classification is difficult, detailed technical information can provide more crucial evidence than a broad commercial description.

5. Condition as Imported or Exported

The condition in which goods cross the border can affect how the classification rules are applied. Relevant details may include whether the shipment contains complete or incomplete products, unassembled items, components, sets, combinations of materials, or mixtures.

6. Supporting Documentation

Businesses can rely on supporting documents to provide additional evidence about a good’s characteristics and help clarify its HS code classification. Useful records may include product specifications, technical datasheets, catalogs, photographs, user manuals, engineering documents, material specifications, and supplier information.

When classifying complex goods, U.S. Customs and Border Protection or CBP’s binding-ruling guidance also emphasizes providing a detailed description of the item and relevant facts when requesting a classification ruling.

How to Classify a Product Step by Step? 

Classifying a product involves narrowing the goods from their characteristics to the appropriate HS heading and subheading. The process also requires applying the relevant legal rules, determining any country-specific classification, and validating the final code before using it.

To learn further how to classify a product, go through the steps below:

Step 1: Understand the Product

The first step to classify a product is to establish exactly what you are assigning an HS code to. A complete understanding of the item provides the foundation for evaluating the relevant heading and applying the classification rules correctly.

To define the item accurately, consider these questions:

• What is the product?

• What is it made of?

• What does it do?

• How is it used?

• How is it presented?

• Is it complete or incomplete?

• Does it contain multiple materials or functions?

Step 2: Identify the Most Relevant HS Section and Chapter

After understanding the product, for classifying it, identify the broad category of goods it belongs to. The Harmonized System follows a hierarchical structure, allowing classification to move from broader categories toward the specific Heading and Subheading that best correspond to the goods.

The HS structure for product classification progresses as follows:

• Sections provide the broadest grouping of goods.

• Chapters ascertain the first two digits of the HS Code.

• Headings determine the first four digits.

• Subheadings identify the first six digits.

• The classification should be narrowed progressively rather than selecting a six-digit code at random.

Step 3: Review the Heading Descriptions

With the relevant headings identified for classification, examine their descriptions closely to see how well they correspond to the actual goods. A commercial item name may resemble tariff wording without accurately reflecting the classification. The description itself should be evaluated against the item.

• Read the actual Heading descriptions in the tariff schedule.

• Do not choose a code solely because its wording matches the commercial name.

• Base the classification on the goods and applicable rules.

• Treat an HS code finder or keyword search as a starting point, not the final answer.

Step 4: Check the Section and Chapter Notes

After reviewing the Heading descriptions, check the relevant Section and Chapter Notes before deciding on the HS code classification. These legal notes can define the scope of a category and may exclude goods that otherwise appear to fit within a particular Heading.

The notes may contain:

• Definitions

• Inclusions

• Exclusions

• Instructions to classify

• Scope limitations

Step 5: Apply the General Rules of Interpretation

Once the relevant notes have been reviewed, the General Rules of Interpretation (GRIs) guide how competing classification possibilities are resolved. They are particularly relevant when items are incomplete, combined, or appear to fit more than one Heading.

The GRIs address the classification of:

• Incomplete or unassembled products

• Mixtures or combinations of materials

• Articles that appear to fall under multiple Headings

• Sets or composite goods

• Classification at the Subheading level

Step 6: Determine the Correct Six-Digit HS Subheading

The relevant Heading provides the basis for narrowing the classification to the correct six-digit Subheading. This is the internationally harmonized level of the HS, where the selected code should correspond to the specific characteristics of the item.

So, the classification should connect:

• Product characteristics to the applicable Heading

• The Heading to the relevant Subheading

• And the item to the classification rules rather than simply matching a search result

Step 7: Determine the Country-Specific Classification

Next, to classify a product, the six-digit HS code may need to be extended to meet the tariff requirements of the country involved in the transaction. National tariff schedules can add digits beyond the internationally harmonized level to provide additional tariff and statistical detail.

• Countries can extend the six-digit HS structure with additional digits.

• The United States uses the HTS for imports.

• Schedule B is used for exports in the United States.

• International HS codes form the first six digits of these classifications.

• Country-specific requirements determine the final classification for the transaction.

Step 8: Validate the Classification

Before using the classification for a transaction, verify that the selected code accurately reflects the item and the reasoning used to reach it. This final review helps identify gaps in product information, interpretation, documentation, or country-specific tariff requirements.

• Check whether the code accurately describes the product.

• Ensure that its primary function has been considered.

• See to it that its material or composition has been accounted for.

• Determine that the relevant Section and Chapter Notes have been reviewed.

• Check that the applicable interpretation rules have been applied.

• The correct country’s tariff schedule should be in use.

• Make sure that the previous decisions for comparable products support the classification.

• Lastly, the additional documentation or expert review should be warranted.

For complex or high-value products, businesses may seek formal classification guidance from the relevant customs authority. In the United States, CBP’s Binding Ruling Program provides binding classification decisions before importation.

A Practical HS Code Classification Checklist 

Before finalizing an HS code, a practical HS code classification checklist can be used to confirm that the necessary product details, classification research, and validation checks have been completed. It provides a structured review to reduce gaps and support consistent classification decisions.

The product information should cover:

• Clear product description

• Material and composition

• Primary function

• Intended use

• Technical specifications

• Product form and condition

• Supporting documentation

Ideally, the classification research should cover:

• Relevant Section identified

• Essential Chapter detected

• Potential Headings reviewed

• Section Notes assessed

• Chapter Notes reviewed

• General Rules of Interpretation considered

• Correct six-digit HS subheading identified

• Country-specific tariff classification checked

The final validation should cover:

• Classification reasoning documented

• Comparable previous classifications reviewed

• Current tariff schedule checked

• Complex or uncertain classifications escalated for expert review where appropriate

Why Does HS Code Classification Get Difficult at Scale? 

HS code classification becomes difficult at scale when a business must classify a large and changing product catalog. Maintaining consistency becomes harder when classification involves multiple products, teams, and markets.

The challenge increases when a business has:

• Hundreds or thousands of SKUs

• Multiple product categories

• Frequent new product introductions

• Multiple markets with different tariff requirements

• Different teams handling classification

• Historical classifications stored in spreadsheets

• Incomplete product information from suppliers