Classifying a product under the correct HTS code is part science, part art. The U.S. Harmonized Tariff Schedule has 13,650 codes across 98 chapters — finding the right one requires a systematic approach. Here's how to do it.
Step 1: Describe Your Product Precisely
Start with a detailed written description of your product. Include:
- What it is — its common name and function
- What it's made of — material composition matters enormously (e.g., cotton vs. polyester, steel vs. aluminum)
- How it's processed — fresh, frozen, dried, assembled, etc.
- Its primary use — industrial, consumer, medical, agricultural
Step 2: Search LookupHTS
Enter your description in the LookupHTS search bar. The tool searches all 13,650 codes from the 2026 USITC schedule and surfaces the most relevant results. Look at the description, heading title, and duty rate for each result.
Step 3: Navigate the Chapter Structure
The HTS schedule is organized into 21 sections and 98 chapters. If you know roughly what category your product falls into, browse directly to that chapter. For example:
- Live animals → Chapter 01
- Electronics → Chapters 84–85
- Apparel → Chapters 61–62
- Vehicles → Chapter 87
- Plastics → Chapter 39
Step 4: Apply the General Rules of Interpretation
The USITC schedule includes six General Rules of Interpretation (GRIs) that govern how goods are classified. The most important: goods should be classified according to the terms of the headings, not by inference. When in doubt, the more specific description wins over a general one.
Step 5: Check the Duty Rate and Special Programs
Once you have a code, note three duty columns:
- General (MFN): The standard rate for most countries
- Special: Reduced or zero rates for FTA partner countries (see the letter codes in parentheses)
- Column 2: Higher rates for non-market-economy countries (currently Russia and Belarus)
Common Mistakes to Avoid
- Classifying by appearance rather than material (a plastic bowl and a ceramic bowl have different codes)
- Ignoring the "other" or residual subheadings
- Confusing the product's end use with its classification (HTS classifies what it is, not always what it's used for)
When to Get a Binding Ruling
If you're unsure about a classification — especially for high-value goods or goods with high duty rates — you can request a binding ruling from U.S. Customs and Border Protection. CBP will tell you definitively which HTS code applies, and you can import with confidence. Apply at rulings.cbp.gov.
Understanding the General Rules of Interpretation
The six General Rules of Interpretation (GRIs) are the legal framework that governs how every product is classified in the HTS. While a full legal analysis is beyond the scope of this guide, understanding the basics will help you avoid common mistakes. GRI 1 states that classification is determined first by the terms of the headings and any relevant section or chapter notes. This means you should always start by reading the legal text of the heading, not just the short description shown in search results.
GRI 3 is particularly important for products that could fit under more than one heading. It provides a hierarchy: first, prefer the most specific description over a general one. If that doesn't resolve the conflict, classify the product by the component that gives it its essential character. For example, a gift set containing a coffee mug (ceramic, Chapter 69) and a bag of coffee beans (Chapter 09) would be classified by whichever component gives the set its essential character — typically the component with the higher value or the one that defines the set's purpose.
When Products Don't Fit Neatly
Not every product maps cleanly to a single HTS code. Multi-function products, composite goods, and items made from mixed materials all present classification challenges. A smartphone, for example, is a telephone, a camera, a computer, and a GPS device all in one — but it's classified under a single HTS code based on its principal function. When you encounter these gray areas, the chapter notes and GRIs become essential tools for making a defensible classification decision.
Products that are imported unfinished or unassembled add another layer of complexity. GRI 2(a) provides that incomplete or unfinished articles are classified as if they were complete, as long as they have the essential character of the finished article. An unassembled bicycle imported as parts in a single shipment is still classified as a bicycle, not as individual metal tubes, rubber tires, and gears. This rule prevents importers from breaking down a product into components to claim lower duty rates on each piece.
Keeping Your Classifications Current
HTS codes are not permanent. The USITC publishes multiple revisions each year, and trade policy changes such as new tariffs, trade agreements, or Presidential proclamations can alter duty rates or create entirely new codes. If you import the same product regularly, make it a practice to verify your HTS code against the latest revision before each shipment. What was a 5% duty last quarter could be 25% today if a new Section 301 action or executive order has taken effect. LookupHTS reflects the current 2026 Revision 5 data, which you can use as a starting point for verification.