Key Takeaways

• HS Code is an international system for classifying goods in international trade. The first six digits follow the Harmonized System structure shared by countries that participate in the HS system.
• Thailand uses the AHTN tariff nomenclature at the 8-digit level, with additional statistical codes used to collect data under the Customs system.
• HS Code affects duty rates, permits, import–export measures, FTAs, and information in the Customs Declaration.
• Products with similar names may be classified under different tariff codes because classification must consider materials, components, functions, uses, and the applicable interpretative rules together.
• Do not select an HS Code based solely on a product name found on Google, a Marketplace, or a Supplier’s tariff code. If you are unsure, consult a specialist or request a ruling through the relevant Customs channels.

What Is an HS Code?

HS Code stands for Harmonized System Code, an international system for classifying goods in international trade.

The Harmonized System is developed and maintained by the World Customs Organization (WCO) to establish a common classification structure that can be used across countries.

When goods are imported or exported, Customs authorities need to know how those goods are classified to assess matters such as:

• Import Duty
• Export / Import Regulation
• Customs Declaration
• FTA
• Rules of Origin
• Statistical Data
• Permit
• Trade Measures

Therefore, an HS Code is more than just a “product code.”

It is important information that connects:

The product → law → tax → documents → customs procedures

Incorrect classification can affect both costs and the Customs Clearance process for a Shipment.

Why Is HS Code Important for Import and Export?

HS Code affects several stages, from before a product is purchased until it is released by Customs.

For example:

A business wants to import a machine from China.

Before calculating the Landed Cost, it should identify the HS Code applicable to the machine because the tariff classification affects:

• Import Duty rate
• FTA benefits
• Permit
• Product Standard
• Customs Declaration
• Trade measures

If the wrong code is used from the beginning, the business may:

• Underestimate taxes
• Claim FTA benefits incorrectly
• Fail to prepare a required permit
• Receive requests for additional information from Customs
• Need to amend the Customs Declaration
• Incur additional costs and delays

Therefore, Classification should be completed before the Shipment is in transit, especially for high-value goods or regulated products.

How Many Digits Does an HS Code Have?

This often causes confusion because businesses may encounter codes with:

• 4 digits
• 6 digits
• 8 digits
• 11 digits

All of these can be related to goods classification, but they represent different levels of detail.

2-Digit HS Code: Chapter

The first two digits identify the Chapter.

This is a broad classification of goods.

Examples of broad groups include:

• Animals and animal products
• Food
• Chemicals
• Textiles
• Machinery
• Vehicles

A 2-digit Chapter alone is not detailed enough to identify goods for actual customs procedures.

However, it indicates the broad group to which the goods belong.

4-Digit HS Code: Heading

At four digits, the code identifies the Heading, or category.

This provides a more detailed classification within a Chapter.

The structure can be understood simply as:

First 2 digits = Chapter

4 digits = Heading

Goods within the same Heading may still be further divided into Subheadings.

6-Digit HS Code: International Harmonized System Level

The first six digits represent the HS Subheading level used as a common structure under the Harmonized System.

They can be broken down as follows:

• 2 digits = Chapter
• 4 digits = Heading
• 6 digits = HS Subheading

This allows countries to understand the basic classification within a shared structure.

However, after the sixth digit, each country or group of countries can add further detail for its own Tariff and Statistics purposes.

How Many Digits Does Thailand Use for HS Code?

Thailand uses the AHTN 8-digit level for its customs tariff classification.

AHTN stands for:

ASEAN Harmonized Tariff Nomenclature

It uses the six-digit HS structure as its foundation and adds two more digits of detail for ASEAN.

This can be understood as:

6-digit HS + 2 additional AHTN digits = 8-digit tariff code

Thailand currently references the AHTN 2022 system for the relevant tariff structure. Businesses should check the latest effective version before proceeding with a Shipment.

What Is an 11-Digit HS Code?

In Thailand’s data system, in addition to the 8-digit customs tariff code, businesses may also encounter three additional statistical digits.

Together, these produce an 11-digit code:

8-digit customs tariff code + 3 statistical digits = 11 digits

Statistical codes are used to provide more detailed product data for purposes such as:

• Trade statistics
• Quantity
• Product controls
• Customs data

under the relevant system.

Therefore, when businesses in Thailand encounter the term “11-digit HS Code,” they should understand that the WCO does not define the international HS as an 11-digit code.

The international HS structure has six digits; the additional detail is introduced at the national or regional level.

What Is the Difference Between HS Code and AHTN?

HS is the international Harmonized System.

AHTN is the system used by ASEAN countries to expand the HS structure with additional regional detail.

A simple way to understand the difference is:

HS = international base structure

AHTN = expanded classification for ASEAN

Therefore, when searching for a product imported into Thailand, do not stop at the six-digit HS level. If the code is needed for Thai customs procedures, check the further level required by the Thai Customs system.

How Do You Read an HS Code Structure?

Consider this example code:

1904.10

Its structure can be broken down as follows:

• 19 = Chapter
• 1904 = Heading
• 1904.10 = HS Subheading

Thailand can then have further subdivisions at the AHTN 8-digit level, as well as the relevant statistical code.

However, the numbers alone do not establish whether a product actually belongs under that code.

You must also review:

• Description
• Section Notes
• Chapter Notes
• Subheading Notes
• Classification Rules

How Do You Find an HS Code?

Finding a tariff code should not begin with guessing based only on the product name.

First, gather product information such as:

• Product name
• Photos
• Material
• Composition
• Function
• Usage
• Model
• Technical Specification
• Production Process, where applicable

Then proceed with Classification.

Step 1: Identify the Product

The product should be described clearly.

For example, the term:

Plastic Product

is too broad.

Determine whether it is a:

• Plastic Box
• Plastic Tableware
• Plastic Machine Component
• Plastic Packaging
• Plastic Decoration

The Function can affect the classification.

Step 2: Check the Materials and Components

Many types of goods are classified based on their Material.

Examples include:

• Plastic
• Steel
• Aluminium
• Textile
• Wood
• Glass

However, some products are made from multiple materials.

For example:

A wooden chair with a metal frame

requires consideration of the applicable classification rules. You cannot automatically choose the material that appears most prominent.

Step 3: Check the Function and Intended Use

Many products are classified according to their Function rather than their material.

This is especially relevant to:

• Machinery
• Electronics
• Instruments
• Parts
• Appliances

For example, the term:

Sensor

is not enough.

You need to know:

• What the Sensor measures
• How it works
• Which Equipment it is used with
• Whether it is a dedicated component or a standalone product

This information allows an initial assessment of the Classification.

Step 4: Search for the Relevant Heading

Once you understand the Product, look for a Heading whose Description appears relevant.

However, do not select a code immediately just because the wording seems to match.

Read the relevant details and Notes as well.

Step 5: Read the Section Notes and Chapter Notes

Notes are a very important part of Classification.

They may specify:

• Which goods are included
• Which goods are excluded
• What particular terms mean
• How Parts should be classified
• Which rules apply to Mixtures or Composite Goods

Sometimes a product appears to belong in one Chapter, but a Note directs its classification to another Chapter.

Therefore, searching a Keyword and selecting the first code found can be risky.

Step 6: Apply the General Rules for Interpretation

Goods are classified under the HS using the General Rules for the Interpretation (GRIs).

These rules help assess cases such as:

• Incomplete goods
• Goods made from multiple materials
• Sets
• Composite Goods
• Goods that may fall under multiple Headings
• Certain types of Packaging

Businesses do not need to memorize every rule for routine Shipments.

However, they should understand that HS Classification is a legal process, not simply a product-name search.

Can You Use the HS Code Provided by a Supplier Without Checking It?

You should not use it without verification.

An overseas Supplier may provide a code such as:

8479.XX

However, that code may be:

• A tariff code used in the country of origin
• A code within that country’s system
• A Classification the Supplier has used previously
• A code that does not match the Product Version being imported

Although the first six digits may align under the HS system, the details after the sixth digit may differ between countries.

Therefore, an Importer in Thailand should verify the Thai tariff code again.

Can You Use an HS Code from Alibaba or a Marketplace?

It can be used as an initial reference, but it should not automatically be treated as evidence for customs declarations.

A Marketplace may display information from:

• Seller
• Product Category
• Automated Classification systems
• Codes from other countries

There is no guarantee that the code matches the actual goods and Thailand’s tariff classification.

If the goods involve:

• High Duty
• Regulation
• Permit
• Anti-dumping
• FTA

the Classification should be checked particularly carefully.

Does the Same Product Have the Same HS Code Worldwide?

At the six-digit HS level, countries using the Harmonized System share the same basic structure.

However, the details beyond six digits can differ.

For example:

Country A may extend the code to 8 digits.

Country B may use 10 digits.

Thailand uses the 8-digit AHTN structure and additional statistical codes under the relevant system.

Therefore, when sending an HS Code to an overseas Buyer, distinguish between:

The 6-digit HS Code and the Tariff Code of a particular country

How Does HS Code Affect Import Duty?

Import Duty is linked to Tariff Classification.

Once the tariff code is identified, you can check the applicable duty rate.

Conceptually, for example:

Product A

HS Code X
Import Duty = one rate

Product B

HS Code Y
Import Duty = another rate

Even if the products are similar, different classifications can result in different tax rates.

This is why HS Code directly affects Landed Cost.

Suggested Internal Link: How Is Import Tax Calculated? Understanding Import Duty, VAT, and Costs Before Importing Goods

Does HS Code Affect VAT?

VAT and Import Duty are separate components of import taxation.

HS Code directly affects the assessment of duty rates and relevant product measures.

VAT is calculated using the applicable tax and customs valuation rules.

Therefore, HS Code should not be viewed as information used only to calculate Duty.

Classification is also relevant to other Customs procedures.

Does HS Code Affect Customs Value?

HS Code and Customs Value are different concepts.

HS Code

answers:

“What is the product under the tariff classification system?”

Customs Value

answers:

“What value is used as the basis for assessing customs duties and taxes?”

Both pieces of information are used together when assessing Import Duty.

The correct tariff code with an incorrect value can cause problems.

Likewise, the correct value with an incorrect tariff code can also cause problems.

Suggested Internal Link: What Is Customs Value? Understanding Customs Valuation Based on CIF

How Does HS Code Affect FTAs?

It has a significant impact.

To check FTA eligibility, the product’s tariff classification is needed to assess:

• Preferential Tariff
• Rules of Origin
• Product-specific Rule
• Certificate / Proof of Origin

For example, a product may have a standard duty rate.

If it qualifies under an FTA, it may receive a preferential rate under the agreement.

However:

Having a Certificate of Origin does not automatically mean that preferential treatment can be claimed.

You must check whether the tariff classification and Rules of Origin comply with the relevant Agreement.

Suggested Internal Link: What Are Form A, Form D, and Form E? How to Claim Import–Export Tariff Preferences

How Are HS Code and Certificate of Origin Related?

A Certificate of Origin or Proof of Origin must relate to the goods for which preferential treatment is claimed.

If the HS Code in the documents:

• Does not match the Declaration
• Does not match the goods
• Is inconsistent with the Rules of Origin

it may cause problems when claiming preferential tariff treatment.

Therefore, check the Classification before issuing a C/O rather than issuing the document first and looking for the tariff code afterward.

Suggested Internal Link: What Is a Certificate of Origin? Understanding Origin Certificates for Import and Export

Does HS Code Affect Import and Export Permits?

It can.

Many government authorities use tariff codes as one of the data points for linking goods to regulatory measures.

Products that may require additional checks include:

• Food
• Cosmetics
• Medical Devices
• Chemicals
• Machinery
• Electrical Products
• Agricultural Products
• Controlled Goods

However, Permit requirements should not be determined by HS Code alone.

Some laws also consider:

• Product Description
• Specification
• Intended Use
• Composition

How Are HS Code and TIS Standards Related?

Some products may be subject to applicable Thai Industrial Standards.

HS Code can be used as one of the data points for screening, but whether a product is subject to a mandatory standard must also be assessed based on:

• Product Type
• Specification
• Standard Scope
• Current Regulation

Do not make a determination based on HS Code alone.

Suggested Internal Link: What Is the TIS Mark? How Does It Affect Import and Export Businesses?

Must an HS Code Be Included on a Commercial Invoice?

This depends on the Transaction requirements and destination.

Some Commercial Invoices include an HS Code to help the Buyer and Customs Broker process the Shipment.

However, HS Code is directly important in the information used for the Customs Declaration.

If an HS Code is included on the Commercial Invoice, ensure that it has been verified.

Do not copy a Supplier’s code without checking it.

Must an HS Code Be Included on a Packing List?

Not for every Shipment.

A Packing List primarily shows:

• Packages
• Quantity
• Weight
• Dimensions

However, a Buyer or certain processes may require the HS Code to be included.

The key point is that classification information across different documents must not conflict.

Must an HS Code Be Included in the Customs Declaration?

Tariff classification is important information in a Customs Declaration.

It is used alongside information such as:

• Product Description
• Quantity
• Customs Value
• Country of Origin
• Permit
• Duty

Therefore, the Exporter or Importer should verify the Classification before preparing the Customs Declaration.

Suggested Internal Link: What Is a Customs Declaration? An Introduction to Key Documents for Import and Export Customs Procedures

What Happens If You Use the Wrong HS Code?

The impact depends on the nature and severity of the error.

Possible consequences include:

• Incorrect duty rate
• Incorrect use of FTA benefits
• Missing Permit
• Requests for additional documents from Customs
• Need to amend the Declaration
• Cargo being placed on hold
• Additional duty assessments
• Extra time and costs
• Compliance risks

For businesses that regularly import the same products, repeated errors can accumulate and affect more than one Shipment.

Can You Use an HS Code with a Lower Duty Rate?

Not if the goods do not fall under that classification.

Classification must reflect the actual characteristics of the goods and comply with the applicable interpretative rules.

Do not start by asking:

“Which code has the lowest tax?”

Instead, ask:

“Which tariff classification is correct for these goods?”

Then check the duty rate and any FTA benefits.

Can One Product Have Multiple HS Codes?

An imported product must be classified appropriately according to its characteristics.

However, goods that:

• Are Sets
• Combine multiple materials
• Have multiple Functions
• Are Parts
• Are incomplete
• Are imported as separate Components

may require further analysis under the interpretative rules to determine the appropriate classification.

This does not mean that businesses can choose multiple codes arbitrarily.

Can Parts Use the Same HS Code as the Machine?

Not always.

Parts are a category in which classification errors are common.

Some Parts have their own specific tariff codes.

Some Parts may be classified according to the machinery they are used with.

Others may be classified under the Heading for the item itself, even if designed for a specific machine, depending on the relevant Notes.

Therefore, the term:

“Machine Parts”

is not sufficient to identify an HS Code.

Additional information should include:

• Part Name
• Material
• Function
• Machine Model
• Drawing / Photo
• Technical Specification

Can You Find the HS Code for an Electronic Product from Its Name Alone?

You should not.

Electronic products can have very different Functions, such as:

• Power Supply
• Sensor
• Communication Device
• Control Unit
• Motor
• Display
• Computer Equipment

Even products that look similar may fall under different Headings.

A Technical Datasheet is therefore very useful for Classification.

What Information Is Needed to Find the HS Code for Chemicals?

You should gather information such as:

• Chemical Name
• Composition
• CAS Number, where applicable
• Concentration
• Intended Use
• SDS

A pure chemical substance and a Preparation / Mixture may have different classifications.

Therefore, the trade name alone is not enough.

What Should You Check When Finding the HS Code for Food?

You may need to consider:

• Ingredients
• Percentage Composition
• Preparation Method
• Sugar / Milk / Cocoa Content, depending on the product
• Packaging
• Product Form

For food products, a Marketing Name alone may not be sufficient.

For example, the term:

Protein Drink

still requires information about its Composition before Classification.

Can You Find an HS Code from a Product Photo Alone?

A photo helps show the product’s appearance, but it is not sufficient in many cases.

For example, machinery may require information about:

• Function
• Capacity
• Operating Principle
• Specification

Chemicals require Composition.

Textiles require Material.

Food requires Ingredients.

Therefore, photos should be used together with other Product Information.

Who Is Responsible for the HS Code: the Importer or Exporter?

Each party should verify the Classification used for the Customs Declaration in its own country.

The Supplier can provide supporting information.

A Freight Forwarder or Customs Broker can help with preliminary checks.

However, the cargo owner should have accurate Product Information and should not shift all responsibility to the Logistics Provider without providing product details.

Can a Freight Forwarder Help Find an HS Code?

A Forwarder or Customs Specialist may help with:

• Reviewing Product Information
• Checking relevant Headings
• Checking Tariffs
• Coordinating Customs Procedures

depending on the Service Scope.

For products with complex classification, the following may be needed:

• Technical Data
• Composition
• Catalogue
• Drawing
• Sample, where applicable

to support the assessment.

Do not expect a Provider to guess the tariff code based on a product photo alone.

What Should You Do If You Are Unsure About an HS Code?

For higher-risk cases, such as:

• High import value
• Significant Duty differences
• Large volumes of recurring imports
• Permit requirements
• Classification disputes

consider checking with the relevant authority or using the applicable tariff-ruling process through the Thai Customs Department.

Thailand has systems for searching tariff information and rulings, including an advance tariff-ruling process under specified criteria.

Before proceeding, check the latest requirements and procedures with the Thai Customs Department.

Can an HS Code Change?

Yes.

The Harmonized System is updated periodically to reflect:

• Technology
• New Products
• Trade Patterns
• Environmental Issues
• Industry Changes

Thailand currently refers to HS 2022 / AHTN 2022 information in the applicable system. When a new version takes effect, businesses should check whether existing tariff codes remain valid or have changed.

Do not keep codes in a system for years without reviewing them.

Can You Continue Using the HS Code from Last Year’s Shipment?

It should be reviewed first, especially when:

• Product Specification changes
• Material changes
• Model changes
• Supplier changes
• HS Version changes
• Laws change

If the goods remain the same and the Classification still applies under the current structure, the code may still be valid.

However, check the current Tariff and Regulation periodically.

How Does HS Code Affect Import Cost Planning?

Before placing an order, an Importer can use the correct Classification to estimate:

• Product Cost
• Freight
• Insurance
• Import Duty
• VAT
• Permit Cost
• Local Charge

This helps establish the Landed Cost before making a purchasing decision.

If the HS Code is only checked after the goods are in transit, the business may discover costs that were not planned for, especially with high-value Shipments.

Example Workflow Before Importing Goods

Suppose a Thai business wants to import a machine from China.

It should start with:

Receive Product Specification

↓

Check Function and Technical Data

↓

Classification / HS Code

↓

Check Duty

↓

Check FTA

↓

Check Permit / Regulation

↓

Calculate Landed Cost

↓

Confirm Order

↓

Prepare Shipping Documents

↓

Customs Clearance

This workflow helps reduce risk compared with confirming an order first and only then asking:

“The goods are almost here—what is the HS Code?”

Checklist of Information for HS Code Review

Before asking a specialist to help with Classification, prepare as much of the following information as is relevant:

• Product name
• Product photos
• Brand / Model
• Material
• Composition
• Ingredients
• Function
• Intended Use
• Technical Specification
• Catalogue
• Datasheet
• Manufacturing Process, where applicable
• Country of Origin
• Supplier HS Code for Reference
• Previous Classification, if available

The clearer the Product Information, the more effective the tariff classification analysis can be.

Common HS Code Mistakes

• Using the Supplier’s code without checking it
• Using a code from a Marketplace
• Searching Google and selecting the first result
• Choosing a code based only on the product name
• Selecting the code with the lowest Duty
• Not reading the Section / Chapter Notes
• Not checking the Product Specification
• Using a 6-digit code as Thailand’s tariff code without checking the AHTN level
• Assuming all 11 digits are part of the international HS code
• Continuing to use an old code after the Product changes
• Not checking FTA requirements
• Not checking Permit requirements
• Looking for an HS Code only after the Cargo is already in transit

Checklist Before Using an HS Code for an Actual Shipment

Make sure that:

• Product Description is clear
• Material / Composition is accurate
• Function is accurate
• HS Heading is appropriate
• Section Notes have been checked
• Chapter Notes have been checked
• Current AHTN has been checked
• Statistical code has been checked, where applicable
• Import Duty has been checked
• FTA has been checked
• Rules of Origin have been checked
• Permit requirements have been checked
• Product Regulation has been checked
• Invoice Description is consistent
• The Customs Declaration uses the correct code
• Buyer / Seller understand the code consistently

Frequently Asked Questions About HS Code (FAQ)

What Is an HS Code?

An HS Code is a system for classifying goods in international trade. It provides a basis for Customs Tariffs, Regulation, and Trade Statistics.

How Many Digits Does an HS Code Have?

The international Harmonized System structure has six digits. Countries or regions can add further digits to classify goods in greater detail.

How Many Digits Does Thailand Use for HS Code?

Thailand uses the 8-digit AHTN tariff structure and, under the relevant system, an additional three-digit statistical code. As a result, combined codes with 11 digits may be encountered.

Can a Chinese HS Code Be Used in Thailand Without Checking It?

No. Although the first six HS digits follow a shared structure, country-specific details after the sixth digit may differ.

Does HS Code Affect Import Duty?

Yes. Tariff classification is one of the key pieces of information used to determine duty rates and customs measures.

Does HS Code Affect FTA Benefits?

Yes. The tariff classification is needed to check the Preferential Tariff and Rules of Origin under the relevant FTA.

Do Products with the Same Name Always Have the Same HS Code?

Not necessarily. Material, Composition, Function, and Specification can result in different classifications.

Can You Find an HS Code from a Product Photo?

A photo can be used as supporting information, but many products require additional Specification, Material, Composition, or Function details for accurate classification.

Can a Freight Forwarder Help Find an HS Code?

A Forwarder can help with checks and coordination within the Service Scope, but the cargo owner must provide accurate and complete Product Information.

What Should You Do If You Are Unsure About an HS Code?

Ask a specialist to review the information. If the classification has a significant impact or remains uncertain, check the current Thai Customs Department process for tariff rulings.

Import–Export and Customs Clearance Services with CPL INTER

CPL INTER provides international transportation services, including:

• Air Courier
• Air Cargo
• Sea Freight
• Road Freight
• Cross-border Transportation

Along with related services such as:

• Shipping Documents
• Packing
• Warehousing
• Customs Clearance
• Delivery

depending on the Service Scope of each Shipment.

If you are planning to import or export goods and need to prepare information for customs procedures, you can provide preliminary details such as:

• Product name
• Photos
• Material / Composition
• Function
• Brand / Model
• Technical Specification
• Country of Origin
• Product quantity and value
• Origin and destination countries

The CPL INTER team can help review Logistics information and coordinate the relevant procedures before Booking.

Tel: 02-519-4426 / 091-519-4426
LINE: @cplinter

Written by: CPL Inter Logistics Operations Team, specialists in international freight transportation and customs procedures, with more than 15 years of experience and an ISO 9001:2015 international quality management system certification.