A commodity code is the standardized number that customs authorities assign to a product to determine what duty it pays and how it moves across a border. Internationally, that code is six digits and comes from the Harmonized System maintained by the World Customs Organization; in the United States, it stretches to ten digits, using the Harmonized Tariff Schedule (HTS) for imports and Schedule B for exports. Getting the code right decides your duty rate, your eligibility for trade-agreement preferences, and whether your shipment clears at all.
What a Commodity Code Is
Every commodity code starts with the Harmonized Commodity Description and Coding System, usually shortened to the Harmonized System or HS. More than 200 countries use it, and it covers over 5,000 commodity groups organized into 21 sections and 97 chapters.1World Customs Organization. What is the Harmonized System (HS)?
The six digits work as a funnel from broad to specific:
- The first two digits are the chapter. Chapter 01 covers live animals; Chapter 84 covers machinery.
- Digits three and four are the heading, a narrower grouping inside the chapter.
- Digits five and six are the subheading, the most specific globally standardized level. Natural honey, for example, sits at 0409.00 because the heading has no further subdivision.1World Customs Organization. What is the Harmonized System (HS)?
Because those six digits are identical everywhere, a product classified as 0901.11 (unroasted, non-decaffeinated coffee) in Brazil is 0901.11 in every other participating country. Countries add their own digits after the sixth for tariff and statistical purposes, but they cannot change what came before.
How the U.S. Extends the Code
The United States runs two separate ten-digit systems that share the same first six digits but are not interchangeable.
HTS for Imports
The Harmonized Tariff Schedule governs anything entering the country. The U.S. International Trade Commission publishes it.2United States International Trade Commission. About Harmonized Tariff Schedule (HTS) A detail most importers miss: the legally binding duty rate is set at the eight-digit level. Digits nine and ten are statistical suffixes that help the Census Bureau track trade flows and have no effect on your tariff treatment.3U.S. International Trade Commission. Harmonized Tariff Schedule of the United States (2026 Basic Edition) Preface U.S. Customs and Border Protection makes the final call on the correct rate, even if you or your broker classified the goods first.4U.S. Customs and Border Protection. Harmonized Tariff Schedule – Determining Duty Rates
Schedule B for Exports
Schedule B is the ten-digit classification for goods leaving the United States, maintained by the U.S. Census Bureau.5U.S. Customs and Border Protection. Schedule B / Export Number It exists mainly for statistical reporting, not tariff calculation, and includes roughly 9,000 codes. The first six digits align with the HS and generally with the HTS, but the final four often differ from the HTS number for the same product. Exporters use Schedule B on export documentation; importers use the HTS on import entries. Do not swap one for the other.
Codes are not permanent. The HS undergoes a major international revision roughly every five years, the USITC publishes a new HTS edition every January 1, and revisions appear online throughout the year.3U.S. International Trade Commission. Harmonized Tariff Schedule of the United States (2026 Basic Edition) Preface Check the current edition before every shipment; a code you used last year may have moved or been deleted.
When You Need a Commodity Code
The old rule of thumb — codes are only necessary above a low-value threshold — no longer holds for imports.
For exports, the threshold survives. You must file Electronic Export Information in the Automated Export System for any commodity classified under a single Schedule B number valued over $2,500.6eCFR. 15 CFR 758.1 – The Electronic Export Information (EEI) Filing to the Automated Export System (AES) Vehicles and any goods requiring an export license need EEI filing regardless of value.7GovInfo. 15 CFR 30.37 – Miscellaneous Exemptions
For imports, the de minimis exemption is effectively gone. Shipments valued at $800 or less used to enter duty-free under Section 321 without formal HTS classification. That exemption was eliminated for goods from China and Hong Kong effective May 2, 2025,8Federal Register. Notice of Implementation of Additional Duties on Products of the Peoples Republic of China and then suspended for shipments from all countries by executive order effective February 24, 2026.9The White House. Continuing the Suspension of Duty-Free De Minimis Treatment for All Countries Formal entry, applicable duties, and proper classification now apply to essentially all imports regardless of value.
How to Classify a Product Correctly
The most common mistake is searching a database for the product’s name and picking the first result that looks close. Classification is a legal determination governed by the General Rules of Interpretation (GRIs), six rules applied in a strict sequence.10World Customs Organization. General Rules for the Interpretation of the Harmonized System
Rule 1 says to classify based on the terms of the headings and any relevant section or chapter notes. Start there, not with a keyword search. Move to later rules only when the headings and notes don’t settle the question. Rule 3(b), for instance, handles mixed-material products by classifying them according to whichever component gives the goods their essential character.10World Customs Organization. General Rules for the Interpretation of the Harmonized System
Before you classify, gather the facts the rules ask about: what the product is made of (by weight and volume for mixed materials), what it does, how it is used commercially, and who the end user is. Function and composition matter far more than the marketing name. A “smart watch” and a “fitness tracker” can land in entirely different headings depending on capability.
Free Government Tools
- The USITC HTS database is the official, current schedule. Importers use it to confirm duty rates and read the legal notes that govern each chapter.2United States International Trade Commission. About Harmonized Tariff Schedule (HTS)
- The Census Bureau Schedule B Search Engine walks exporters to the correct ten-digit number through questions about composition, end use, and function. Read the four-digit heading and six-digit subheading descriptions carefully before choosing.11United States Census Bureau. Finding Your Schedule B Number
- CBP’s Customs Rulings Online Search System (CROSS) holds classification decisions back to 1989. Past rulings on similar products aren’t binding on yours, but they show how CBP reasons through the rules.12U.S. Customs and Border Protection. Customs Rulings Online Search System (CROSS)
Getting a Binding Ruling
When you can’t confidently pick a code, or when the financial exposure is high, you can ask CBP for a binding ruling. A binding ruling is CBP’s official position on how your specific product should be classified, and it binds all CBP personnel until modified or revoked.13eCFR. 19 CFR 177.9 – Effect of Ruling Letters
You submit a letter to CBP’s National Commodity Specialist Division describing the product in detail: composition (with weight and volume breakdowns for mixed materials), commercial use, purchase price, approximate selling price, the classification you believe is correct, and your reasoning. Include photographs, drawings, or a sample when you can.14eCFR. 19 CFR 177.2 – Submission of Ruling Requests A request submitted to a service port office is limited to five items of the same general type.
The National Commodity Specialist Division typically issues rulings within 30 calendar days. Products that need lab analysis or another agency’s input take longer, and cases referred to CBP Headquarters can take up to 90 days.15U.S. Customs and Border Protection. Requirements for Electronic Ruling Requests Rulings cover only prospective transactions; you cannot use one to retroactively justify a code you already used.
What Happens If You Get It Wrong
The legal responsibility for correct classification falls on the importer or exporter of record, not on your customs broker or freight forwarder. Federal law requires the importer to use “reasonable care” when filing entries, including classification and the applicable duty rate.16Office of the Law Revision Counsel. 19 USC 1484 – Entry of Merchandise “I didn’t know” is not a defense.
Penalties scale with the severity of the violation:17Office of the Law Revision Counsel. 19 USC 1592 – Penalties for Fraud, Gross Negligence, and Negligence
- Negligence: up to the lesser of the domestic value of the goods or two times the unpaid duties, taxes, and fees. If the error didn’t affect the duty amount, the cap is 20% of the dutiable value.
- Gross negligence: up to the lesser of the domestic value or four times the unpaid duties. With no duty impact, 40% of the dutiable value.
- Fraud: up to the full domestic value of the merchandise, with no reduced alternative.
CBP can also seize merchandise, delay shipments, and retroactively reassess duties with interest on past entries. A pattern of mistakes can push CBP’s view of your intent from negligence into gross negligence.
Prior Disclosure
If you spot a classification error before CBP starts a formal investigation, a prior disclosure sharply reduces your exposure. For negligence or gross negligence, a valid prior disclosure caps the penalty at interest on the unpaid duties, provided you pay the shortfall at the time of disclosure or within 30 days of CBP’s calculation.17Office of the Law Revision Counsel. 19 USC 1592 – Penalties for Fraud, Gross Negligence, and Negligence For fraud, the reduced cap is 100% of the unpaid duties rather than the full domestic value. Once you receive notice of an investigation, the window closes, and the burden of showing you didn’t know about that investigation is on you.
Recordkeeping
Importers must retain all records related to an entry for five years from the date of entry. Records for goods admitted duty-free under certain low-value provisions must be kept for at least two years.18eCFR. 19 CFR 163.4 – Record Retention Period Keep the classification decisions themselves, the product information you relied on, and correspondence with brokers or CBP. In an audit or penalty case, those records are the primary evidence that you exercised reasonable care.
Why Accuracy Matters More in 2026
Classification has always driven your base duty rate. Now additional tariff layers stack on top of that base rate depending on the product’s HTS code and country of origin. For goods from China, Section 301 tariffs add anywhere from 7.5% to 100%, and which additional rate applies is determined entirely by which HTS subheading the product falls under. Electric vehicles from China carry a 100% additional rate; semiconductors and solar cells carry 50%. A minor specification change can shift a product from a 7.5% line to a 50% line.
Codes also decide whether you qualify for reduced duty rates under free trade agreements. Most FTAs use a tariff-shift test: a product qualifies for preferential treatment only if its non-originating components change HTS classification through manufacturing in a partner country. Classify components or the finished product wrongly and you may fail the shift and lose a preference you were entitled to, or claim one you don’t qualify for and face penalties later.19International Trade Administration. Rules of Origin – Tariff Shift Either way, the ten digits you write on the entry are where the money is decided.