You can find your HTS (Harmonized Tariff Schedule) code by searching the U.S. International Trade Commission’s free online database at hts.usitc.gov. The site lets you look up any product by keyword and drill down through chapters and headings until you reach the specific 10-digit code that determines your duty rate. Getting this code right matters: it controls how much you pay in tariffs and which regulatory requirements apply to your shipment.
What an HTS Code Is and How It’s Structured
An HTS code is a 10-digit number that classifies every product imported into the United States. The system is built in layers. The first six digits follow an international standard used by most countries worldwide, so a cotton t-shirt starts with the same six digits whether it’s heading to the U.S., Germany, or Japan. The last four digits are U.S.-specific and narrow the classification further, pinpointing details like fabric weight, fiber content, or intended use.
Each digit matters. The first two identify the broad chapter (Chapter 61 covers knitted apparel, for example). The next two narrow it to a heading within that chapter. Digits five and six define a subheading. The final four digits get granular enough to set the exact duty rate. Two products that sound similar can land in very different headings with different duty obligations, which is why precision in classification is critical.
Using the USITC Search Tool
The primary free tool is the search function at hts.usitc.gov. Type a product keyword into the search bar, and the tool returns matching chapters, headings, and subheadings. From there, you expand the results to find the most specific code that describes your product.
Start broad. If you’re importing ceramic mugs, search “ceramic” or “drinking vessels” rather than a brand name or overly specific phrase. The tariff schedule uses technical commodity language, not marketing terms, so you may need to try several variations. Once you find the right chapter, read the section notes at the top carefully. These notes contain rules that override what might seem like an obvious fit. A product made of two materials, for instance, might be classified by whichever material gives it its “essential character,” and the chapter notes spell out how to make that call.
Work your way down from the general heading to the most specific subheading that matches your product. The general rule is to classify at the most detailed level available. If your product fits two headings equally well, the tariff schedule has tiebreaker rules (called General Rules of Interpretation) printed at the beginning of the document.
HTS Codes for Imports vs. Schedule B for Exports
If you’re importing, you need an HTS code. If you’re exporting, you technically need a Schedule B number, though in most cases you can use the HTS code instead. The first six digits of an HTS code and a Schedule B number are always identical for any given product. When you file an export shipment using an HTS number, the Census Bureau converts it to a Schedule B number automatically for statistical purposes.
There are exceptions. Some products require more specific detail on the export side than the HTS provides. Aircraft turbine parts are one example where the HTS code doesn’t carry enough detail, and you must use the Schedule B number instead. The Census Bureau publishes a list of HTS codes that are not valid for the Automated Export System. If your product falls on that list, look up the correct Schedule B number at census.gov/scheduleb.
Checking CBP Rulings for Complex Products
When your product doesn’t fit neatly into one category, or when you’re unsure between two possible codes, check how U.S. Customs and Border Protection has classified similar items in the past. CBP maintains a searchable database called CROSS (Customs Rulings Online Search System) at rulings.cbp.gov. It contains classification rulings dating back to 1989.
You can search CROSS by keyword, product description, or ruling number. The database supports Boolean searches, so you can combine terms to narrow results. If you find a ruling for a product similar to yours, it gives you strong guidance on which heading CBP considers correct. Pay attention to whether a ruling has been modified or revoked, since CROSS cross-references updated decisions automatically.
For products that are genuinely ambiguous, you can also request a binding ruling from CBP before you ship. This is a formal written decision that tells you exactly how CBP will classify your product, and it’s legally binding at the port of entry. Binding rulings take time to process, sometimes several months, so plan ahead if your product is unusual or high-value.
Why Getting the Code Right Matters
Your HTS code determines your duty rate, which directly affects your landed cost. It also triggers regulatory requirements. Certain codes require additional permits, inspections, or documentation from agencies like the FDA, USDA, or EPA. Choosing the wrong code doesn’t just mean paying the wrong tariff. It can hold your shipment at the port or flag your company for increased scrutiny on future imports.
CBP treats misclassification seriously. Penalties for negligence can reach up to two times the lawful duties owed, or 20% of the dutiable value of the goods. If CBP determines the misclassification was fraudulent, penalties can climb to the full domestic value of the shipment. Even honest mistakes trigger delays, additional paperwork, and potential back-duty assessments on prior shipments of the same product.
Practical Steps to Confirm Your Code
Once you’ve identified a likely HTS code, verify it from multiple angles before filing. Start by reading the chapter and section notes in the tariff schedule, not just the line item description. These notes define terms, set boundaries between chapters, and establish classification priorities that override the plain-language descriptions.
Next, check CROSS for rulings on similar products. If your product is manufactured, review the materials, the manufacturing process, and the product’s primary function, since all three can affect classification. A backpack with a built-in solar panel, for example, could potentially fall under luggage or electrical equipment depending on which function CBP considers primary.
If you import regularly, consider working with a licensed customs broker. Brokers classify products as part of their daily work and carry professional liability for the accuracy of their filings. For a one-time or low-value shipment, the free tools above are usually sufficient. For ongoing imports of complex or high-duty products, professional classification reduces your exposure to penalties and ensures you’re not overpaying duties on every shipment.