How to find the HS code for your product (and why getting it wrong is costly)

How the HS code system works

The Harmonized System is an international standard maintained by the World Customs Organization (WCO). The first 6 digits are the same across all countries that use the system -- they identify the product at a broad international level. The US extends this to 10 digits for the Harmonized Tariff Schedule (HTS), with the additional digits adding US-specific detail.

Reading an HTS code:

• First 2 digits: the chapter. Chapter 61 = knitted or crocheted clothing. Chapter 84 = machinery. Chapter 85 = electrical equipment.
• Digits 3-4: the heading within the chapter. More specific product category.
• Digits 5-6: the subheading. Further narrows the product type. These first 6 digits are the international HS code.
• Digits 7-8: US-specific subdivision.
• Digits 9-10: statistical suffix used by the US Census Bureau. These do not affect the duty rate but must be included on the entry.

The duty rate, Section 301 tariff, and any trade preference eligibility are all tied to the full 10-digit HTS code.

How to look up your HTS code

The authoritative source for US HTS codes is the USITC (US International Trade Commission) Harmonized Tariff Schedule, available at usitc.gov. It is free to use and updated regularly.

Step-by-step:

• Go to the USITC HTS search tool. You can search by keyword (e.g. 'ceramic mug') or browse by chapter.
• Read the chapter notes and section notes. These are legally binding definitions that determine what is and is not included in each heading. A product that sounds like it fits a heading may be excluded by a chapter note.
• Find the most specific subheading that describes your product. The HTS is organized from general to specific -- always use the most specific code that accurately describes the goods.
• Check the general duty rate in the 'General' column. This is the MFN rate applied to most imports.
• Check the 'Special' column for preferential rates (e.g. USMCA for Canadian/Mexican goods) and for any Section 301 additional duties.
• Note the full 10-digit code including the statistical suffix.

Common classification mistakes

These are the errors that most often result in wrong HTS codes:

• Using the supplier's code without verifying it. Chinese suppliers often provide an HS code on the commercial invoice. Chinese HS codes follow the international 6-digit standard but may differ at the 8 or 10-digit US level. Always verify the supplier's code against the US HTS before filing.
• Classifying by material instead of use. The HTS classifies some products by what they are made of and others by their primary function. A plastic bucket and a plastic storage bin may have different HTS codes even though both are plastic. Read the heading text carefully.
• Missing chapter notes that exclude your product. A heading may seem to fit, but a note at the beginning of the chapter may explicitly exclude your product. Chapter and section notes are part of the legal classification -- always read them.
• Using a 6-digit code instead of 10 digits. US import entries require the full 10-digit HTS code. A 6-digit code is an incomplete classification.
• Guessing on composite products. Products made of multiple materials or serving multiple functions are classified by the component that gives the article its essential character, or by specific HTS rules for composite goods. This is one of the most common areas where classification disputes arise.

What happens if the HTS code is wrong

CBP has the authority to audit import entries and re-liquidate them at the correct duty rate. The consequences of wrong classification:

• Back-payment of duties: if CBP determines your goods were classified at a lower rate than correct, you owe the difference plus interest (currently around 8% annually on unpaid duties).
• Penalties: deliberate misclassification to reduce duties is considered customs fraud. Penalties can reach four times the unpaid duty amount.
• CBP holds: if your shipment is flagged for classification review, the goods are held at the port until the classification is resolved. Storage fees accumulate while you wait.
• Marking violations: some HTS codes require the goods or their packaging to bear a country of origin marking. Wrong classification can mean the goods are not marked correctly, triggering a separate violation.

Honest classification mistakes -- where you made a good-faith effort but got it wrong -- are treated differently than deliberate misclassification. If you are unsure, ask your customs broker or request a binding ruling from CBP before importing.

When to get a binding ruling

A binding ruling is an advance classification decision from CBP. You submit a ruling request describing your product in detail, and CBP issues a written ruling that is legally binding on them -- they must apply the stated HTS code to your shipment.

Get a binding ruling when:

• Your product could plausibly fit more than one HTS code and the duty rates differ significantly.
• The product is composite, multi-function, or made of unusual materials.
• Large order volumes mean that even a small duty rate difference adds up to a material amount.
• You want certainty before committing to a large sourcing order.

Binding rulings are free and available through the CBP online ruling system (rulings.cbp.gov). Processing typically takes 30 days. Once issued, the ruling is valid for three years unless CBP revokes it.