The Harmonized Tariff Schedule of the United States is the ten-digit classification system that assigns every physical product entering the country a code and a duty rate. It lives at hts.usitc.gov, is maintained by the U.S. International Trade Commission, and is enforced at the border by U.S. Customs and Border Protection.1United States International Trade Commission. About Harmonized Tariff Schedule (HTS) To figure out what you owe on an import, you find the code that matches your product, read the correct duty rate column for the country of origin, and add any extra duties and federal fees that apply.
How the Ten-Digit Code Is Built
Every product gets a ten-digit HTSUS code, and each pair of digits does specific work.
- Digits 1–2 name the chapter, a broad product group like dairy, chemicals, or machinery.
- Digits 1–4 give the heading, a narrower grouping within the chapter.
- Digits 1–6 give the subheading. This is the internationally standardized level: those six digits mean the same thing in over 200 countries that follow the Harmonized System managed by the World Customs Organization.2World Customs Organization. What is the Harmonized System (HS)?
- Digits 7–8 are the U.S. rate line, where the specific American duty rate is set.
- Digits 9–10 are the statistical suffix, used by the government to track trade volumes. They don’t change your duty rate, but they still have to appear on your entry filing.
The USITC publishes a new basic edition every January 1 and posts online revisions throughout the year as trade policy shifts.3United States International Trade Commission. Harmonized Tariff Schedule of the United States (2026 Basic Edition) Preface Presidential proclamations and new trade actions can change rates mid-year, so work from the live online schedule, not a downloaded copy from months ago.
Finding the Right Code for Your Product
Before you touch the search tool, describe your product the way the schedule does: by what it’s made of, how it works, and what it’s used for. Marketing language is useless. A “premium wireless earbud” needs to become something like a wireless audio receiver with a lithium-ion battery, a Bluetooth radio, and an in-ear speaker driver in a plastic housing.
Different product types demand different details. Textiles need exact fiber composition by percentage (60% cotton, 40% polyester). Chemicals need the Chemical Abstracts Service number or the precise chemical name. Machinery classifies differently depending on whether you’re importing a complete unit, a part, or an accessory. The form of shipment matters too: a bulk chemical in a tanker classifies differently than the same chemical bottled for retail.
Pull together supporting documents before you search. Safety data sheets, engineering specifications, lab analyses, commercial invoices, and manufacturing descriptions all become evidence if CBP questions your code later. CBP expects importers to exercise “reasonable care” in classifying their goods and has published a checklist of the questions an importer should be able to answer, including whether you’ve consulted the HTSUS and relevant rulings, obtained any specialized analyses your product needs, and set up a written compliance program.4eCFR. Appendix B to Part 171 – Customs Regulations, Guidelines for the Imposition and Mitigation of Penalties for Violations of 19 U.S.C. 1592
Working the Search Tool
The official database at hts.usitc.gov is free and searchable by keyword or numeric code.5United States International Trade Commission. Harmonized Tariff Schedule of the United States Enter a technical description rather than a brand name. Searching “bicycle” scatters hits across chapters because tires, parts, and complete bicycles each live in different places. Something like “bicycle, assembled, with pneumatic tires” points you at the right chapter faster.
Once a heading looks promising, drill down through the hierarchy: heading, subheading, eight-digit rate line, then the ten-digit statistical level. You need the full ten digits before you can file an entry.
Read the Section and Chapter Notes
The single most common classification mistake is skipping the Section Notes and Chapter Notes. They contain binding legal definitions and exclusions that can override what a heading appears to describe.6U.S. Customs and Border Protection. Tariff Classification – Informed Compliance Publication A product that looks like it belongs in Chapter 90 (optical instruments) can be pulled by a Chapter Note into Chapter 85 (electrical equipment) based on how it works internally. The search interface has clickable icons that open these notes in pop-ups. Open them for every chapter you’re considering.
When More Than One Heading Fits
The six General Rules of Interpretation are the legally binding instructions for choosing among competing headings.7United States International Trade Commission. Harmonized Tariff Schedule of the United States – General Rules of Interpretation They work in order. GRI 1 says start with the heading text and the relevant Section and Chapter Notes, and most classifications end there. GRI 2 covers unfinished articles and mixtures: a disassembled product with the essential character of the finished good classifies as the finished good. GRI 3 breaks ties by picking the most specific heading first, then by essential character, then by whichever heading comes last numerically. GRI 4 catches leftovers by pointing to the most similar product. GRI 5 handles containers and packing. GRI 6 applies the same logic at the subheading level.
Reading the Duty Rate Columns
Each eight-digit rate line displays three duty rate columns. Which one applies depends on the country of origin.
Column 1 – General
This is the normal trade relations rate, sometimes still called Most Favored Nation. It covers goods from the vast majority of countries.8United States International Trade Commission. Harmonized Tariff Schedule of the United States – General Note 3 Rates come in three shapes: a percentage of value (ad valorem), a fixed dollar amount per unit (specific), or a combination (compound). Many consumer goods land between zero and 20% of declared value, though footwear and certain textiles run higher.
Column 1 – Special
The Special subcolumn lists preferential rates available under free trade agreements and preference programs, with letter codes in parentheses identifying each program. “S” or “S+” indicates USMCA eligibility. Other codes cover agreements with countries such as Australia, South Korea, and Colombia. To claim a preferential rate, your goods have to meet the agreement’s rules of origin, which typically require a minimum share of value or materials to come from the partner country.
You’ll also see “A” for the Generalized System of Preferences, which historically gave duty-free treatment to certain products from developing countries. GSP expired on December 31, 2020 and has not been renewed by Congress as of 2026.9U.S. Customs and Border Protection. Generalized System of Preferences (GSP) Until Congress acts, goods that would otherwise qualify enter at the full General rate. The “A” symbols remain in the schedule, which confuses importers who assume the program is still active.
Column 2
Column 2 rates apply to a small set of countries without normal trade relations with the United States. As of 2026, that list is Cuba, North Korea, Russia, and Belarus.10U.S. Customs and Border Protection. Column 1 / Column 2 / MFN / NTR – Countries That Does Business With the United States These rates run dramatically higher and can exceed 50% of value. Sourcing through an intermediary country doesn’t change the outcome if the goods originated in one of the four.
Duties That Stack On Top
The Column 1 General rate is a starting point, not a total. Several categories of additional duties live in Chapter 99 of the HTSUS and pile on top of the standard rate. Missing them is one of the costliest mistakes an importer can make.
Section 301 Duties on Chinese Goods
Products from China may carry additional tariffs under Section 301 of the Trade Act of 1974. The USITC publishes a reference list mapping specific eight-digit subheadings from Chapters 1–97 to corresponding Chapter 99 headings (like 9903.88.01 or 9903.91.01) where the extra duty rate appears.11United States International Trade Commission. Harmonized Tariff Schedule of the United States – China Tariffs Some product exclusions granted by the U.S. Trade Representative appear directly in the schedule. Because these duties have been modified repeatedly and vary widely by product, check the current China Tariffs reference before calculating landed cost.
Section 232 Duties on Steel and Aluminum
Steel and aluminum imports face Section 232 national security tariffs. As of April 2026, the primary rate is 50% on covered steel and aluminum articles, with 25% on certain derivative products. Country-level exemptions and tariff-rate quotas that previously existed were revoked effective March 12, 2025, and Commerce is no longer accepting exclusion requests.12Bureau of Industry and Security. Section 232 Steel and Aluminum If your product’s code falls within the covered headings, this duty applies on top of the standard rate.
Antidumping and Countervailing Duties
Antidumping duties target products sold in the U.S. below fair market value. Countervailing duties offset foreign government subsidies. Unlike Section 301 and 232 duties, AD/CVD rates aren’t listed in the HTSUS. Check CBP’s dedicated AD/CVD database, which is separate from the tariff schedule, to see whether an order covers your product.13U.S. International Trade Commission. Where Can I Search for Antidumping Rates Online AD/CVD rates can top 200%, they apply per-company or per-country, and they are easy to overlook if you only consult the tariff schedule.
Federal Fees Beyond the Duty
Even duty-free imports carry federal processing fees.
CBP charges a Merchandise Processing Fee on most formal entries. For fiscal year 2026, the rate is 0.3464% of the goods’ value, with a minimum of $33.58 and a maximum of $651.50 per entry.14Federal Register. Customs User Fees To Be Adjusted for Inflation in Fiscal Year 2026 The minimum means even a small shipment of a few hundred dollars still owes $33.58. Goods entering under certain trade agreements may qualify for reduced or waived MPF.
Cargo arriving by ocean vessel is also subject to the Harbor Maintenance Fee of 0.125% of value, which funds port infrastructure.15eCFR. 19 CFR 24.24 – Harbor Maintenance Fee It doesn’t apply to air or overland shipments, so the same product arriving by container costs slightly more at entry than the same product flown in.
Other Agencies Flagged in the Schedule
Some HTSUS codes carry flags showing that a federal agency other than CBP has jurisdiction over the product. These Partner Government Agency flags trigger additional data requirements at entry that go beyond the customs filing itself. The FDA, for example, uses four flag codes (FD1 through FD4) that determine whether you must submit entry data, file a Prior Notice, or file a disclaimer, depending on whether the product may be food, is food, or is a regulated non-food item like a drug, device, or cosmetic.16U.S. Food and Drug Administration. Harmonized Tariff Schedule and FD Flags NHTSA, EPA, the Consumer Product Safety Commission, and Fish and Wildlife Service all have their own flag systems tied to specific codes. Missing a PGA filing can hold your shipment at the port even when your classification and duty payment are correct.
Getting Certainty With a Binding Ruling
The search tool and its results are general guidance. CBP has said explicitly that relying solely on general publications and search tools may not satisfy the reasonable care standard.17U.S. Customs and Border Protection. U.S. Customs and Border Protection Rulings Program When classification is genuinely ambiguous or the financial stakes are high, request a binding ruling.
A binding ruling is a written decision from CBP’s Regulations and Rulings office telling you exactly how your product will be classified at any U.S. port. Requests go to CBP’s National Commodity Specialist Division in New York or the Commercial and Trade Facilitation Division in Washington, D.C.18eCFR. 19 CFR 177.2 – Submission of Ruling Requests Your request must include a full product description, materials by weight and volume, intended use, photos or samples where possible, and relevant invoices or contracts. If you already have a position on the correct classification, state it with your reasoning.
Before requesting your own ruling, search CBP’s Customs Rulings Online Search System at rulings.cbp.gov to see whether CBP has already ruled on something similar. The database contains over 220,000 rulings dating back to 1989.19U.S. Customs and Border Protection. Customs Rulings Online Search System (CROSS) Rulings on similar products give useful guidance, but only a ruling issued to you on your specific product gives you individual reliance protection. If CBP later changes its position, holding a binding ruling entitles you to notice and a transition period rather than retroactive penalties.
What Misclassification Costs
Penalties depend on culpability. Federal law sets three civil tiers:20Office of the Law Revision Counsel. 19 USC 1592 – Penalties for Fraud, Gross Negligence, and Negligence
- Fraud: up to the full domestic value of the merchandise, for knowingly false information.
- Gross negligence: up to four times the lost duties, or the domestic value, whichever is less. When the error didn’t affect duty amounts, the penalty can reach 40% of dutiable value.
- Negligence: up to two times the lost duties, or the domestic value, whichever is less. When duties weren’t affected, the cap is 20% of dutiable value.
Federal law also requires you to keep all records related to an import entry for five years from the date of entry.21Office of the Law Revision Counsel. 19 USC 1508 – Recordkeeping Missing records undermine any reasonable-care defense in an audit that reaches back that far.
One of the most underused protections in customs law is prior disclosure. If you find a classification error and report it to CBP before the agency begins a formal investigation, penalties for negligence and gross negligence drop to just the interest on unpaid duties. For fraud with prior disclosure, the cap falls from full domestic value to 100% of the unpaid duties.20Office of the Law Revision Counsel. 19 USC 1592 – Penalties for Fraud, Gross Negligence, and Negligence If you realize you have been entering goods under the wrong code, filing a prior disclosure quickly can save significant money.
Separately, importing goods through false documentation or smuggling can lead to criminal prosecution with fines and up to 20 years in prison.22Office of the Law Revision Counsel. 18 USC 545 – Smuggling Goods Into the United States Criminal charges require proof the importer acted knowingly and willfully with intent to defraud, so honest mistakes don’t lead to prison. Intentionally undervaluing goods or using a lower-duty code while knowing the correct one does.