The USITC tariff database — formally the Harmonized Tariff Schedule of the United States (HTSUS) — is the official, government-maintained list of every product category importable into the US, along with the duty rate, trade program eligibility, and special conditions attached to each one. If you import goods commercially, this database determines how much you pay CBP at the border.
Understanding how to read and search it correctly can be the difference between paying the right duty rate and triggering a penalty audit.
What Is the USITC Tariff Database?
Harmonized Tariff Schedule of the United States (HTSUS): The legally binding classification system that assigns a unique 10-digit code to every commercially importable product, establishing the duty rate, quota status, and trade program eligibility for each product entering the United States. It is published and maintained by the U.S. International Trade Commission (USITC) under authority granted by 19 USC 1202.
The database is accessible for free at hts.usitc.gov. It is not a suggestion guide — it is the legal instrument CBP officers use to assess duties when your shipment clears the border.
The HTSUS is the US implementation of the international Harmonized System (HS), a product classification framework maintained by the World Customs Organization (WCO) and used by 212 countries. The first 6 digits of any HTS code follow the international standard; digits 7–10 are US-specific additions that capture statistical and duty-rate detail unavailable at the international level.
By the numbers:
- The HTSUS contains over 17,000 tariff lines across 99 chapters and 22 sections
- The US collected $77.5 billion in customs duties in fiscal year 2023, according to CBP’s official trade statistics
- As of 2024, Section 301 tariffs on goods from China cover more than 5,700 HTS subheadings, with rates ranging from 7.5% to 100%
- The USITC updates the tariff schedule approximately 20–30 times per year through official supplements published in the Federal Register
How the USITC Tariff Database Is Organized
The HTSUS uses a hierarchical structure. Every product moves through several layers before reaching its final, duty-bearing classification.
Step 1: Identify the Chapter (2 digits)
The schedule opens with 99 chapters grouped into 22 sections. Chapter 01 covers live animals; Chapter 97 covers works of art. Section XI, for example, covers all textile and apparel products (Chapters 50–63). Start by identifying which chapter logically covers your product’s primary material or function.
Step 2: Find the Heading (4 digits)
Within each chapter, headings group products by type. Chapter 61, which covers knitted apparel, contains headings like 6101 (men’s overcoats), 6104 (women’s suits), and 6109 (T-shirts). The 4-digit heading level is where you confirm you’re in the right product family.
Step 3: Drill Down to the Subheading (6 digits)
Subheadings refine classification by material, use, or construction. This is the level aligned with the international HS standard. Duty rates and quota triggers sometimes appear here, but the US often reserves rate specificity for deeper levels.
Step 4: Apply the US-Specific Subdivision (8 digits)
The 7th and 8th digits are unique to the United States. This is where most duty rates are formally assigned and where preferential trade agreement rates (USMCA, CAFTA-DR, etc.) are applied. Section 301 tariff applicability is also tied to 8-digit subheadings.
Step 5: Record the Statistical Suffix (10 digits)
The 9th and 10th digits are statistical — required on CBP entry documents but do not affect duty rates. They allow the Census Bureau and USITC to track trade volumes at a granular level.
Step 6: Check Special Programs and Additional Duties
After finding the 10-digit number, review the “Special” rate column in the database. This column lists duty rates available under named trade programs (CA = USMCA, MX = USMCA, IL = US-Israel FTA, etc.). Also check for active antidumping or countervailing duty orders at enforcement.trade.gov/adcvd, which can add substantial costs on top of the base duty rate.
The Legal Framework Behind the HTSUS
The HTSUS is not an administrative suggestion. It carries the force of law under several statutes:
- 19 USC 1202 — Establishes the HTSUS as the legal basis for classifying merchandise imported into the United States
- 19 USC 1484 — Requires the importer of record to use “reasonable care” in determining the correct classification, value, and country of origin for every entry
- 19 CFR Part 152 — Governs CBP’s customs valuation methods and their relationship to the tariff schedule
- 19 USC 1592 — The penalty statute. It allows CBP to assess penalties ranging from 20% to 4x the lost revenue for misclassification, depending on whether the error was negligent, grossly negligent, or fraudulent
CBP’s General Rules of Interpretation (GRI), printed at the beginning of the HTSUS, govern how classification disputes are resolved when a product could logically fall under more than one heading. There are six GRI rules; most products are classified under GRI 1 (classification is determined by the terms of the heading and any relevant section or chapter notes). GRI 3 governs composite goods and mixtures — it is the most frequently litigated classification rule.
When CBP and an importer disagree on classification, the importer can request a binding ruling through rulings.cbp.gov. CBP issues these rulings in writing; they are binding on both parties and searchable in the public database by product type, HTS code, or keyword.
Reading the Rate Columns: A Practical Example
The USITC tariff schedule has three duty rate columns for every subheading. Here is how they compare:
| Column | Name | Who It Applies To | Typical Rate Range |
|---|---|---|---|
| General (Column 1) | Normal Trade Relations (NTR) / MFN | All WTO member countries | 0%–37.5% depending on product |
| Special (Column 1) | Preferential Programs | USMCA, FTA partners, GSP, AGOA | 0% (duty-free) for qualifying goods |
| Column 2 | Statutory Rate | Cuba and Belarus (non-NTR countries) | Often 25%–110% or higher |
| Additional | Section 301 / 232 / 201 | China (301), Steel/Aluminum (232), Solar/Washers (201) | 7.5%–100% added on top of Column 1 |
A single product from China can carry a Column 1 general rate (say, 3.7%) plus a Section 301 additional duty (25%), making the effective rate 28.7%. Importers who read only the general rate column routinely underpay — and CBP will collect the difference with interest.
Real-World Classification Scenarios
Scenario 1 — The E-commerce Seller A small business imports silicone phone cases from China. A quick search in the USITC database under “phone case” returns candidates in Chapter 39 (plastics) and Chapter 42 (leather goods). The correct heading is 3926.90 (other articles of plastics). The 10-digit number lands at 3926.90.9990, with a general duty rate of 5.3% plus a 25% Section 301 tariff — an effective rate of 30.3%. Assuming only 5.3% because the product “seems cheap” would create a significant underpayment.
Scenario 2 — The Food Importer A restaurant chain imports canned artichoke hearts from Peru. The HTSUS assigns these to heading 2005.99. Because Peru is a party to the US-Peru Trade Promotion Agreement, the importer qualifies for the “PE” preferential rate in the Special column — 0%. Without checking the Special column, the importer might pay the general NTR rate of 14.9%. Missing preferential rates costs real money; the International Trade Administration publishes guides on which goods qualify for each FTA.
Scenario 3 — The Automotive Parts Buyer A manufacturer imports steel suspension brackets from Canada. The product falls under HTS 8708.80.65. Under USMCA, if the parts meet the applicable Rules of Origin (Regional Value Content ≥ 70% under the net cost method, per the USMCA’s automotive product-specific rules), the rate drops to 0% under the “CA” special rate. A customs broker specializing in automotive imports can confirm RVC calculations before the first shipment arrives. You can browse brokers by specialty to find automotive-focused customs brokers who handle this type of classification regularly.
Common Mistakes When Using the Tariff Database
Stopping at 6 digits. The 6-digit HS subheading is the international standard, but US duty rates live at the 8- and 10-digit levels. A 6-digit code is insufficient for entry filing under 19 CFR 141.86.
Ignoring chapter notes. Chapter and section notes in the HTSUS are legally binding exclusions and inclusions. Heading 9503, for example, covers toys — but the chapter notes define “toys” in ways that exclude many products a layperson would call a toy. Skipping the notes is the most common source of classification errors.
Missing antidumping/countervailing duty orders. The base duty rate in the HTSUS does not reflect ADD/CVD orders. A separate check at enforcement.trade.gov/adcvd is required. Some ADD rates exceed 200%.
Assuming last year’s rate still applies. The USITC publishes tariff supplements throughout the year. Section 301 tariff exclusions, in particular, have been granted, expired, and reinstated multiple times since 2018. Treating an old HTS printout as current is a compliance risk.
Misidentifying country of origin. The correct duty rate depends on where the product was substantially transformed, not where it shipped from. A product assembled in Vietnam from Chinese components may still carry Section 301 duties if CBP determines China as the country of origin under 19 CFR Part 102.
If you are unsure how to classify a product or which country-of-origin rules apply, working with a CBP-licensed customs broker is the most reliable way to avoid a misclassification penalty. Brokers who work specific ports also understand how local CBP offices tend to scrutinize particular product categories — you can browse by U.S. port of entry to find brokers familiar with your specific crossing point.
Tools and Resources for Tariff Research
The USITC tariff database sits at the center of a broader ecosystem of trade compliance tools. Here is where each resource fits:
| Resource | URL | Best Used For |
|---|---|---|
| USITC Tariff Database | hts.usitc.gov | Finding HTS codes, duty rates, and special program eligibility |
| CBP Binding Rulings | rulings.cbp.gov | Confirming how CBP has classified similar products |
| ADD/CVD Orders | enforcement.trade.gov/adcvd | Checking antidumping and countervailing duty orders |
| ACE Portal | ace.cbp.dhs.gov | Filing entries, reviewing prior filings, accessing CBP accounts |
| CBP.gov | cbp.gov | Regulatory guidance, broker license lookup, enforcement notices |
| Trade.gov | trade.gov | FTA eligibility guides, export resources, market intelligence |
| NCBFAA | ncbfaa.org | Finding licensed customs brokers, industry standards, education |
For complex shipments — pharmaceuticals, chemicals, food products, vehicles — working with a specialist broker reduces both classification risk and the time your shipment sits at the port. You can browse brokers by state or explore specialty coverage for pharmaceutical, food, automotive, and electronics brokers.
For deeper background on how customs clearance integrates with warehousing and fulfillment operations, see our guide on 3PL with customs clearance and warehousing.
Frequently Asked Questions
What is the USITC tariff database?
The USITC tariff database is the official online version of the Harmonized Tariff Schedule of the United States (HTSUS), maintained by the U.S. International Trade Commission at hts.usitc.gov. It lists every product category that can be imported into the US, along with the applicable duty rates, trade agreement benefits, and special trade program eligibility. Importers, customs bro