If you import goods into the United States, you've probably come across the term HTS code. It stands for Harmonized Tariff Schedule code, and it's one of the most important numbers in international trade. This guide explains everything you need to know.
What Is an HTS Code?
An HTS code is a 10-digit number assigned to every product that enters the United States. The code tells U.S. Customs and Border Protection (CBP) exactly what the product is, which determines:
- The duty rate (the percentage tax you pay on the product's value)
- Whether the product qualifies for special trade programs like free trade agreements
- Any import restrictions, quotas, or licensing requirements that apply
- Statistical tracking by the U.S. government
How Are HTS Codes Structured?
HTS codes follow a specific structure. All 10 digits are meaningful:
- Digits 1–2: Chapter (broad category, e.g., Chapter 03 = Fish & Seafood)
- Digits 3–4: Heading (narrower group within the chapter)
- Digits 5–6: Subheading (further detail — this is the international HS level)
- Digits 7–8: U.S. tariff rate line
- Digits 9–10: Statistical suffix (used for reporting, not always relevant to duty)
Who Manages HTS Codes?
The U.S. International Trade Commission (USITC) publishes and maintains the official Harmonized Tariff Schedule of the United States. It is updated several times per year, with the current version being the 2026 Revision 5. The full schedule is public domain and freely available.
Why Does the Right HTS Code Matter?
Using the wrong HTS code — even accidentally — can lead to serious consequences:
- Overpaying or underpaying duties
- Delays at the border
- Fines and penalties from CBP
- Missing out on duty-free treatment under a free trade agreement
When in doubt, consult a licensed customs broker or request a binding ruling from CBP before filing.
How Do I Find an HTS Code?
You can search for HTS codes right here on LookupHTS by typing a plain-English description of your product. You can also browse all 98 chapters of the schedule or use the duty calculator to estimate what you'll owe.
Real-World Examples of HTS Classification
To understand how HTS codes work in practice, consider a few common imports. A men's cotton woven dress shirt is classified under 6205.20.20, which falls in Chapter 62 (articles of apparel, not knitted or crocheted). The code specifies the garment type, the fabric composition, and the construction method. Change the fabric from cotton to polyester, and the code shifts to 6205.30 — with a potentially different duty rate.
Similarly, a stainless steel kitchen knife falls under 8211.91 (table knives with fixed blades), while a folding pocket knife with a stainless steel blade is classified under 8211.93. The distinction between fixed and folding blades matters for classification purposes, even though both products are knives made of the same material.
These examples illustrate a critical principle: HTS classification is driven by the specific characteristics of the product — its material, form, function, and construction — not just its general category. Two products that look similar to a consumer may have completely different HTS codes, duty rates, and trade program eligibility.
HTS Codes and Trade Compliance
Beyond determining how much duty you pay, your HTS code drives several other aspects of trade compliance. Certain codes are flagged for additional requirements such as partner government agency (PGA) review. For instance, products classified under food-related chapters may require clearance from the Food and Drug Administration (FDA), while products containing certain chemicals may need Environmental Protection Agency (EPA) approval before they can enter the country.
Your HTS code also determines whether your product is subject to trade remedy measures. Anti-dumping duties, countervailing duties, Section 301 tariffs on Chinese goods, and Section 232 tariffs on steel and aluminum all apply based on the HTS classification of the imported product. Getting the code wrong doesn't just affect your base duty — it can mean missing additional tariffs that add 25% or more to your total cost.
For businesses that import regularly, maintaining accurate HTS classifications is not just a cost issue — it's a compliance obligation. CBP conducts audits and can assess penalties for repeated misclassification, even when the errors are unintentional. Many importers work with licensed customs brokers or trade compliance consultants to ensure their classifications are defensible.