HTS Codes (Harmonized Tariff Schedule)

Structure of an HTS Code

HTS codes follow a hierarchical structure that moves from broad product categories to specific item descriptions. The code length determines the level of specificity.

• Chapters (2 digits): The first two digits define the broadest product category. For example, Chapter 61 covers knitted or crocheted articles of apparel, while Chapter 84 covers machinery and mechanical appliances.
• Headings (4 digits): The first four digits narrow the classification to a specific product group. These four digits are internationally standardized under the World Customs Organization's Harmonized System (HS), meaning the same four-digit code identifies the same product category in virtually every country.
• Subheadings (6 digits): The six-digit level provides further specificity and is also internationally harmonized. This is the level at which most international trade statistics are reported.
• U.S.-Specific (8 digits): The seventh and eighth digits are specific to the United States and define the duty rate applicable to that particular product. This is the level at which importers must classify their goods for customs entry purposes.
• Statistical Suffix (10 digits): The ninth and tenth digits are statistical reporting numbers used by the U.S. Census Bureau for trade data collection. They do not affect duty rates but are required on customs entry documents.

How Duty Rates Are Determined

Each 8-digit HTS code maps to a specific duty rate, which may be expressed as an ad valorem percentage (a percentage of the declared value), a specific rate (a fixed dollar amount per unit of quantity), or a compound rate (a combination of both).

The general duty rate applies to imports from most countries under Normal Trade Relations (NTR), formerly known as Most Favored Nation (MFN) status. Special duty rates may apply under free trade agreements such as USMCA (for Mexico and Canada), CAFTA-DR, or the Generalized System of Preferences (GSP) for qualifying developing countries.

Additional duties may also apply on top of the standard rate. These include Section 301 tariffs (currently applied to many Chinese imports), Section 232 tariffs (on steel and aluminum), and antidumping or countervailing duties on specific products from specific countries.

Why Accurate Classification Matters

Misclassifying goods under the wrong HTS code can have serious consequences for importers, ranging from financial penalties to shipment delays.

• Overpaying Duties: If a product is classified under a code with a higher duty rate than the correct one, the importer pays more than necessary on every shipment. Over time, this directly erodes margins.
• Underpaying Duties: Classifying under a lower duty rate code, even unintentionally, can trigger a customs audit, back-duty assessments, interest charges, and civil penalties. Repeat violations can result in increased scrutiny on all future imports.
• Partner Government Agency Requirements: Certain HTS codes trigger additional regulatory requirements. Products classified under specific codes may require FDA clearance, USDA inspection, FCC certification, EPA compliance, or CPSC testing before they can be released from customs.
• Trade Agreement Eligibility: Preferential duty rates under free trade agreements are only available if the product is correctly classified and meets the applicable rules of origin.

HTS Codes in Inbound Logistics

For teams managing inbound supply chains, HTS codes appear at multiple points in the import process. They are referenced on commercial invoices, customs entry documents, and broker statements. They drive the duty amounts that appear on customs invoices, which in turn affect the total landed cost of goods.

InboundShipments allows importers to associate HTS codes with products at the purchase order and shipment level. This enables accurate landed cost estimation before goods arrive, duty tracking across shipments, and consistent classification across the organization.