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How to read a US HTS code

The Harmonized Tariff Schedule of the United States (HTSUS) is the US tariff classification system. It assigns imported goods a numerical code used to determine:

• The applicable customs duty rate
• Whether additional trade measures may apply
• Statistical reporting requirements
• Any special program or quota treatment shown in the schedule

A complete US classification is generally shown as a 10-digit number, although people often refer to the first six digits when discussing the international Harmonized System (HS) classification.

Classification is a legal and technical exercise. Product composition, construction, function, dimensions, and other facts can affect the result. When the correct classification is uncertain, seek advice from a qualified customs professional or consider requesting a binding ruling from US Customs and Border Protection.

The five levels of an HTS code

An HTS code narrows from a broad product category to a detailed statistical description.

For example, a code may be displayed in a format similar to:

XX.XX.XX.XX.XX

The letters above are placeholders, not a real classification. The punctuation is used for readability; the digits are the important part.

1. The two-digit chapter

The first two digits identify the chapter. Chapters group goods by broad type, such as:

• Apparel and clothing accessories
• Machinery
• Plastics and articles made from plastics
• Vehicles
• Food products

A chapter provides context, but it is usually not detailed enough to classify a product by itself.

2. The four-digit heading

The first four digits identify the heading within the chapter. A heading describes a narrower class of goods and may distinguish products by factors such as:

• Material
• Function
• Manufacturing method
• Intended use
• Product form

At this stage, you should compare all potentially relevant headings rather than selecting the first one that appears to match a product description.

3. The six-digit subheading

The first six digits identify the HS subheading. These six digits are used internationally under the Harmonized System, although countries may apply different national subdivisions and rates after the sixth digit.

Subheadings often introduce important distinctions, including:

• Product material or fiber content
• Whether an item is made of one material or a mixture
• Product size or weight
• Whether an article is complete or unfinished
• Whether a textile is knitted or woven
• Whether a machine is designed for a particular function

The six-digit description is often the most useful starting point for comparing classifications across countries. However, the complete US classification normally requires continuing to the eight- and ten-digit levels.

4. The eight-digit US tariff item or rate line

Digits seven and eight create a US-specific subdivision below the international six-digit subheading. This level is often called a tariff item, US tariff line, or rate line.

The eight-digit line can determine the applicable general duty treatment shown in the HTSUS. It may also distinguish products using more detailed facts than the six-digit subheading, such as:

• Fiber composition
• Gender or age category for apparel
• Product dimensions
• Capacity or power
• Specific end use
• Whether a product is a part, accessory, or complete article

Do not assume that products sharing the same six-digit HS code have the same US duty treatment. The US-specific subdivisions below six digits may lead to different eight-digit lines.

5. The ten-digit statistical suffix

The final two digits are the statistical suffix. This produces the complete ten-digit US statistical reporting number.

The statistical suffix may provide a more detailed description for import data collection. It does not necessarily change the general duty rate from the preceding tariff item, but the complete number is still important for entry filing and accurate trade statistics.

The statistical suffix can distinguish products by details such as:

• Specific material or composition
• Product style or type
• Size
• Packaging or presentation
• Other reporting characteristics

Always verify the complete ten-digit number and its current description in the live HTSUS data.

How classification narrows step by step

Classification is not simply a keyword search. The process generally works from broad categories to more specific descriptions:

1. Identify the product’s objective facts.

   • What is it?
   • What is it made of?
   • How is it constructed?
   • What does it do?
   • Is it complete, unfinished, or a part?
   • How is it presented or packaged?

2. Select a potentially relevant chapter.

3. Compare the headings within that chapter.

4. Apply the relevant legal notes and classification rules.

5. Compare subheadings at the same level.

6. Continue through the US eight-digit and ten-digit subdivisions.

7. Confirm the code’s current description, duty treatment, and any applicable measures.

The classification rules and section, chapter, and heading notes have legal significance. A product that appears to fit a description may be excluded by a note, or a rule may require classification elsewhere.

Example: knitted versus woven textile goods

Textile classification illustrates why construction details matter. Two garments may look similar and serve the same purpose, but one may be knitted and the other woven.

• Knitted goods are formed by interlooping yarns.
• Woven goods are formed by interlacing yarns, generally in lengthwise and crosswise directions.

The HTSUS may direct knitted and woven products into different headings or subheadings. That distinction can affect the full ten-digit classification and the applicable trade measures.

When reviewing a textile product, gather facts such as:

• Whether the fabric is knitted, crocheted, or woven
• Fiber content by weight
• Whether the article is coated, laminated, embroidered, or otherwise treated
• Garment type and construction
• Whether it is for men, women, children, or a unisex market, where relevant
• Whether it is a complete article, a component, or fabric sold by the piece

Do not classify a textile solely from product photos or a marketing name. A technical specification, fabric construction report, supplier documentation, or physical examination may be needed.

Using the HTS browse tree

The HTS browse tree is useful when you know the general product category but do not know the code.

Step 1: Start with the broad product category

Open the browse tree and select the chapter that appears to cover the product. Read the chapter title and any introductory notes before proceeding.

For example, a product may initially appear to belong in a chapter based on:

• Its material
• Its principal function
• Its physical form
• Its industry or product type

Step 2: Review the headings

Open the chapter and compare the four-digit headings. Read the full wording rather than relying on a shortened label.

Look for distinctions involving:

• Material
• Function
• Product condition
• Manufacturing process
• Whether the item is a part or complete product

Step 3: Follow the matching subheading

Once a heading appears relevant, expand it and compare the six-digit subheadings. Subheading wording often contains the detail that separates similar products.

Compare subheadings at the same indentation level. Do not skip from a broad heading to a lower-level description without checking the intervening structure and notes.

Step 4: Continue to the US tariff item and statistical suffix

After identifying the likely six-digit subheading, expand the US subdivisions. Review all available eight-digit and ten-digit options and select the one that matches the product’s facts.

Record the complete ten-digit number, not just the first six digits.

Using lookup search

Use Search a product or HTS code when you already have a likely description, a code from a supplier, or a code from a prior shipment.

Search by product description

Enter specific, factual terms rather than broad marketing language. For example, include details such as:

• Product type
• Primary material
• Construction method
• Function
• Intended use
• Whether it is a part or complete article

A search for “jacket” may return many results. A search describing the textile construction, fiber content, and garment type is more likely to produce useful candidates.

Search results are starting points, not automatic classifications. Read the full tariff descriptions and compare the results with the product’s actual specifications.

Search by an existing HTS code

If you have a code from a supplier, broker, marketplace, or previous entry, enter it into the lookup tool to review:

• The code’s current description
• Its place in the HTS hierarchy
• The applicable general rate information
• Related tariff provisions or measures, where available

A previously used code may no longer be appropriate if the product changed, the classification was incorrect, or the HTSUS was amended. Confirm the live entry before using it for a new shipment.

Checking duty rates and additional measures

The HTS classification is only one part of the import analysis. The final amount due may depend on the product’s:

• Country of origin
• Entry date
• Customs value
• Trade agreement eligibility
• Quota or preference program
• Additional tariffs or special measures
• Exclusions, product-specific provisions, or other conditions

After finding the likely code, review the relevant measures rather than relying only on the general rate column.

Useful SkuWatch resources include:

• Measures by country of origin for country-specific checks, including China
• The Section 301 hub for covered products and related requirements
• The Section 232 hub for measures affecting covered goods
• All tracked measures for a broader review
• Recent changes for updates that may affect a classification or measure
• Other guides for related importing and trade-compliance topics

These resources help identify issues to investigate, but confirm current legal requirements and filing treatment against official US sources or with a customs professional when necessary.

A practical classification checklist

Before using an HTS code for an import, confirm:

• The product description matches the actual merchandise.
• The chapter and heading are appropriate.
• Relevant section, chapter, and heading notes were reviewed.
• Material and composition information is accurate.
• Construction details, such as knitted versus woven, are documented where relevant.
• The six-digit subheading is correct.
• The US eight-digit tariff item matches the product.
• The ten-digit statistical suffix is complete and current.
• The country of origin is determined under the applicable origin rules.
• Additional measures and exclusions were checked.
• The live HTSUS data was reviewed for current treatment.
• Any uncertainty requiring professional judgment has been escalated.

Frequently asked questions

Is the six-digit HS code enough for a US import?

Usually not. The first six digits identify the international HS subheading, but US entry filing generally requires the complete US ten-digit statistical reporting number. The eight- and ten-digit subdivisions can affect the applicable US treatment and reporting requirements.

Why can two similar products have different HTS codes?

Small factual differences can change classification. Examples include material, function, fiber content, construction method, dimensions, and whether an article is knitted or woven. Similar appearance does not guarantee identical classification.

Can I use a supplier’s HTS code?

You can use it as a research starting point, but you remain responsible for using an accurate classification for the import. Verify the code against the product’s specifications and current HTSUS data. A customs broker or other qualified professional can help assess a difficult classification.

Does an HTS code automatically show every tariff that applies?

No. The HTS code is a key input, but additional treatment may depend on origin, entry date, product facts, and special measures. Review the relevant measures by origin, Section 301, Section 232, and other current sources.

Reference information only, not customs, legal, or classification advice. Tariff rules change frequently; confirm against the official source before you act.