How to Find Your HTS Code — A Step-by-Step Guide for Importers

Every product imported into the United States needs an HTS code. That code determines how much duty you pay. Get it right, and you pay what you owe. Get it wrong, and you could overpay by thousands — or underpay and face penalties that average $127,000 per audit adjustment.

Roughly 30% of audited import entries have classification errors. Most of those errors are avoidable. This guide walks you through how to find your HTS code correctly the first time.

If you're new to tariffs entirely, start with our Complete Guide to US Import Tariffs in 2026. Otherwise, let's get into it.

How HTS Codes Are Structured

Before you look up a code, you need to understand how the system is organized. The Harmonized Tariff Schedule breaks every physical product into a hierarchy of increasingly specific categories.

The first six digits are internationally harmonized — they mean the same thing in every country that uses the Harmonized System (which is most of them). Digits 7-8 are specific to the United States and determine your actual duty rate. The last two digits are for statistical reporting and do not affect what you pay.

Your duty rate is locked in at the 8-digit level. That's the number you need to get right.

Step-by-Step: Finding Your HTS Code

Step 1: Describe Your Product by Material and Function

Start by answering these questions about your product:

• What is it made of? (cotton, steel, plastic, leather, mixed materials)
• What does it do? (is it a tool, a garment, a machine, a food product?)
• How is it constructed? (woven, knitted, molded, assembled from parts)
• Is it finished or unfinished? (a complete widget vs. a component)

Write these answers down. The HTS classifies products primarily by what they are, not by what they're used for. A plastic container is classified under plastics, even if you sell it as a pet food bowl.

Step 2: Find the Right Chapter

The HTS has 99 chapters organized into 22 sections. The chapters follow a general progression:

• Chapters 1-24: Animals, food, beverages
• Chapters 25-27: Minerals, fuels
• Chapters 28-38: Chemicals
• Chapters 39-40: Plastics, rubber
• Chapters 41-43: Leather, furskins
• Chapters 44-49: Wood, paper
• Chapters 50-63: Textiles and apparel
• Chapters 64-67: Footwear, headwear
• Chapters 68-71: Stone, ceramics, glass, jewelry
• Chapters 72-83: Base metals
• Chapters 84-85: Machinery, electronics
• Chapters 86-89: Vehicles, aircraft, vessels
• Chapters 90-92: Instruments, clocks, musical instruments
• Chapters 93: Arms and ammunition
• Chapters 94-96: Furniture, toys, misc manufactured goods
• Chapter 97-99: Art, antiques, special provisions

Using your product description from Step 1, identify the chapter that fits. If your product is a cotton t-shirt, you're looking at chapters 61 (knitted apparel) or 62 (woven apparel). If it's a stainless steel kitchen knife, start with chapter 82 (tools and cutlery).

Step 3: Narrow Down to the Heading and Subheading

Within your chapter, scan the 4-digit headings to find the one that matches your product type. Then drill into the 6-digit subheadings, where classifications split by material composition, size, weight, or construction method.

This is where precision matters. A "sweater" classified under 6110.20 (cotton) faces a 16.5% duty rate. The same sweater classified under 6110.30 (man-made fibers) faces 32%. The material composition of your product — not what it looks like — drives the subheading.

Step 4: Check the General Rules of Interpretation

The General Rules of Interpretation (GRI) are the legal framework that governs how every product gets classified. If you're unsure where your product fits, these rules break the tie. There are six, and they apply in order:

• GRI 1: Classification is determined by the terms of the headings and section/chapter notes. Always start here. Read the actual text of each heading and the legal notes at the beginning of each chapter.
• GRI 2(a): Incomplete, unfinished, or disassembled products are classified as if they were complete, as long as they have the essential character of the finished product.
• GRI 2(b): Mixtures and combinations of materials are classified based on the component that gives the product its essential character.
• GRI 3: When a product could fall under two or more headings, classify it under the heading that provides the most specific description. If that doesn't resolve it, classify by essential character, then by the heading that comes last numerically.
• GRI 4: Products that can't be classified under GRI 1-3 are classified under the heading for the most similar goods.
• GRI 5: Covers classification of cases, containers, and packing materials.
• GRI 6: Classification at the subheading level follows the same principles as classification at the heading level.

You don't need to memorize these, but you do need to know they exist. When your product sits on the boundary between two codes — a bag that could be luggage or a handbag, a device that could be a phone accessory or a standalone gadget — the GRI determines where it lands.

Step 5: Verify at the 8-Digit Level

Once you've narrowed down to a 6-digit subheading, expand it to see all the US-specific 8-digit tariff lines beneath it. Read the descriptions carefully. The 8-digit level often splits by value thresholds, specific dimensions, or further material details.

Confirm the duty rate shown for your 8-digit code, then check whether any additional tariffs apply (Section 301, Section 232, anti-dumping duties) based on the country of origin. Our duty calculation guide covers how those layers stack.

Where to Look Up HTS Codes

USITC HTS Online (hts.usitc.gov) — The official, authoritative source. Browse by chapter or search by keyword. This is the legal reference that CBP uses, and it should be your starting point for every classification.

CBP CROSS Rulings Database — Customs and Border Protection publishes its past classification rulings in the CROSS (Customs Rulings Online Search System) database. Search for products similar to yours to see how CBP has classified them. These rulings aren't binding on your shipment, but they show you how CBP thinks.

TariffDesk HTS Lookup — Our free HTS lookup tool lets you search by product keyword, view the current duty rate, see which additional tariffs apply by country of origin, and check for recent rate changes. It's the fastest way to go from product description to total duty estimate.

Your Customs Broker — A licensed customs broker classifies products for a living. If you already work with one, ask them to confirm your code. They carry liability for misclassification, so they have every incentive to get it right.

CBP Binding Ruling — For maximum certainty, you can request a binding ruling from CBP. This is an official, legally binding classification decision for your specific product. More on when to use this below.

Common Classification Mistakes

Classifying by use instead of material. A silicone phone case is classified under plastics (Chapter 39), not under telephone parts (Chapter 85). The HTS cares about what something is made of first.

Trusting your supplier's suggested code. Foreign suppliers often provide an HTS code on their commercial invoice. These are frequently wrong — sometimes accidentally, sometimes to suggest a lower rate. Always verify independently.

Confusing similar codes. Cotton and synthetic versions of the same product sit in different subheadings with very different rates. Parts and accessories for the same machine often have separate codes. "Similar" is not "same" in the HTS.

Ignoring chapter and section notes. The legal notes at the beginning of each HTS chapter define what is included and excluded. A product that looks like it belongs in Chapter 85 (electronics) might be explicitly excluded and pushed to Chapter 90 (instruments) by a chapter note.

The cost of these mistakes is real. Learn more in our guide to what happens when you use the wrong HTS code.

When to Request a Binding Ruling

A binding ruling from CBP gives you a definitive, legally enforceable classification for your product. CBP is bound by its own ruling, and so are you. Request one when:

• Your product is complex or novel — it combines materials, functions, or technologies that don't map neatly to one heading.
• The duty rate difference between two plausible codes is large — if one code is 2.5% and the other is 25%, the cost of guessing wrong justifies the time investment.
• You're importing high-value or high-volume goods — even a small rate difference on large shipments adds up fast.
• Your product contains mixed materials — textiles, composites, and multi-component goods are common sources of classification disputes.

Submit your request through CBP's eRulings portal. Include product photos, material specifications, and a detailed description of the product's function and construction. Expect a response in 30-90 days. The ruling is typically valid for the life of the product unless the law changes.

Get Your Code Right Before You Ship

Finding the correct HTS code is the single most important thing you can do to control your import costs. It determines your base duty rate, whether additional tariffs apply, and whether you qualify for any trade program benefits.

Take the time to verify your classification before your first shipment. If you're unsure, use the CROSS database to see how similar products have been ruled, or request a binding ruling for peace of mind.

Look up your HTS code and see the current duty rate -- TariffDesk HTS Lookup

Keep reading:

• The Complete Guide to US Import Tariffs in 2026
• What Happens If You Use the Wrong HTS Code
• How to Calculate Your Total Import Duty