A tariff estimate is not one number copied from an HTS search result. It is a controlled scenario that connects a specific product, a supportable classification, country of origin, customs value, quantity, entry date, and every applicable duty layer. The U.S. International Trade Commission publishes the Harmonized Tariff Schedule, while U.S. Customs and Border Protection administers and enforces it. [1] [2] Use the Tandom U.S. Tariff Calculator to build an initial scenario, then retain and review the underlying facts and official sources before making a commercial commitment.
TL;DR
- Define the exact product and import scenario before searching a tariff code. Small changes in material, construction, function, origin, value, quantity, or entry date can change the result.
- Treat classification as a reasoned decision, not a keyword match. Read the heading, subheading, section and chapter notes, units, rate columns, and Chapter 99 cross-references in the live HTS. [1]
- Build the estimate in layers: customs value, base duty, any applicable special or additional tariff treatment, possible AD/CVD cash deposits, and non-duty import costs. Do not present the base rate as total landed cost.
- Screen AD/CVD separately. An HTS code associated with an order is only a screening clue and does not establish whether the written scope covers the product. [7]
- The foreign supplier should provide complete product, origin, producer, exporter, and value facts. The U.S. importer of record remains responsible for entry, classification, value, and required information under the reasonable-care standard. [8]
Freeze the product and quote scenario
Start one duty worksheet for one product configuration and one planned import. Record the quotation number, part number, revision, buyer, proposed importer of record, destination, expected entry date, currency, quantity, unit of measure, Incoterms rule, and exact named place. If any of these changes, preserve the old scenario and issue a revision.
| Input | What to record | Why it changes the estimate |
|---|---|---|
| Product identity | Part number, plain-language name, function, drawings, photos, and configuration | Classification applies to the imported article, not the sales category |
| Construction | Materials by component, composition, dimensions, weight, and assembly state | Material and condition at import can change the heading or subheading |
| Manufacturing facts | Principal process, unfinished or finished state, kit contents, and packaging | Processing and presentation can affect classification and origin analysis |
| Trade parties | Manufacturer, seller, exporter, and proposed importer of record | AD/CVD treatment and entry responsibilities can depend on the actual parties |
| Commercial facts | Unit price, quantity, assists, packing, commissions, discounts, and other adjustments | Customs value is not always the invoice unit price |
| Timing | Expected shipment and U.S. entry dates | HTS provisions, exclusions, and trade measures can change |
Build a classification file that another reviewer can follow
Search the live HTS, then document why the selected language fits the product. Read the relevant heading and subheading together with section notes, chapter notes, statistical suffix, unit of quantity, general and special rate columns, footnotes, and Chapter 99 instructions. CBP explains that the USITC publishes the HTS and CBP is responsible for administration and interpretation at import. [2]
- 1
Describe the article
Write a neutral product description using objective construction, material, function, and import-condition facts.
- 2
Develop candidate headings
Search by function and construction, not only the seller's product name. Record the candidates considered.
- 3
Read the legal text
Apply the heading text and relevant notes, then continue through the U.S. subheading and statistical suffix.
- 4
Record the rationale
Save the selected 10-digit HTS number, quoted legal language, exclusions considered, source URL, reviewer, and date.
- 5
Test contrary facts
Identify which change in material, function, assembly state, or kit contents would produce a different result.
Prior entry records, broker advice, and competitor classifications can inform the analysis, but they do not replace product-specific reasoning. When the classification is uncertain and commercially material, the importer or another eligible requester can consider a prospective CBP binding ruling supported by complete facts and a sample when appropriate. [4]
Read every layer of the duty stack
The rate beside an HTS subheading may be only the first layer. Follow all cross-references and test whether the origin, product, entry date, and other facts trigger a special program or an additional Chapter 99 provision. For products of China, use the USTR Section 301 search and CBP guidance rather than an old spreadsheet or a supplier's memory. [5] [6]
| Layer | Question to answer | Evidence to retain |
|---|---|---|
| Customs value | What value basis will the importer declare, including required additions or adjustments? | Commercial terms, invoice inputs, assists and packing facts, valuation review |
| Base HTS duty | What formula appears in the applicable rate column? | Current HTS provision, rate, unit, and lookup date |
| Special tariff treatment | Does the origin and transaction meet every eligibility and documentation condition? | Origin analysis, program rule, and supporting records |
| Chapter 99 measures | Does a cross-reference add, suspend, exclude, or otherwise modify treatment? | Chapter 99 provision, product coverage, origin, effective dates, and exclusion status |
| AD/CVD | Is the merchandise within the written scope of an order and what current instruction applies? | Order, scope analysis, case number, producer and exporter combination, and query date |
| Non-duty costs | Which fees, brokerage, freight, insurance, handling, taxes, and destination charges apply? | Service quotes and a clear included or excluded cost list |
Confirm origin before applying additional tariffs
Country of export, seller location, shipment route, and country of origin are different facts. Do not remove a China-origin tariff assumption merely because goods ship through another country or are invoiced by a non-Chinese seller. Record where each material and operation occurs, then have the importer review whether processing in another country produces the claimed origin.
- Manufacturer name and complete production address
- Country and supplier for each important material or component
- Process map showing the country where each manufacturing step occurs
- Finished product function and the effect of each processing step
- Exporter, seller, routing, consolidation, and transshipment facts
- Origin marking proposed for the product and packaging
- Section 301 search result, applicable list or provision, exclusion status, and lookup date
- Importer, broker, or counsel approval of the origin and additional-duty assumption
The USTR search tool is designed to help users navigate Section 301 tariff actions, while CBP publishes entry guidance and FAQs. Search results still need to be connected to the correct HTS provision, product description, origin, and effective date. [5] [6]
Run AD/CVD as a separate scope review
Do not treat an ordinary tariff lookup as an AD/CVD clearance. Commerce states that HTS numbers in AD/CVD orders are provided for convenience and customs purposes, while the written scope description controls. A matching HTS code can identify a possible order, but it cannot establish that the product is in scope. A different HTS code cannot by itself prove that the product is outside scope. [7]
| Screening result | Commercial treatment | Next action |
|---|---|---|
| No plausible order found | Keep the result date-stamped and conditional | Retain search terms, product facts, country, and sources checked |
| Possible order, clear exclusion | Do not claim exclusion until the exact facts are documented | Map every exclusion element to evidence and obtain importer review |
| Possible order, ambiguous scope | Do not promise a zero-deposit or fixed landed price | Escalate to the importer and qualified trade counsel; consider Commerce scope procedures |
| Product appears in scope | Model the current cash-deposit scenario separately | Confirm case, producer, exporter, current instructions, and potential rate variability |
Use the AD/CVD risk guide for the full product-and-country screening workflow. The classification file and the scope file should cross-reference each other, but they answer different legal questions.
Calculate a traceable estimate and quote the boundary
Use the formula printed for each applicable provision. An ad valorem rate applies to the relevant customs value, a specific rate applies to the stated quantity unit, and a compound rate uses both. Do not add percentages before confirming that they use the same value base, and do not convert a specific duty into a percentage without showing the quantity and value assumptions.
| Field | Example of a controlled entry |
|---|---|
| Scenario | Part 1047-B, revision C, 2,000 pieces, planned October entry |
| Classification | Proposed 10-digit HTS number, rationale owner, and review date |
| Origin | Proposed country of origin with manufacturing-facts file and reviewer |
| Value and quantity | Declared-value assumption, currency, exchange-rate date, quantity, and HTS unit |
| Duty lines | Provision, rate or formula, calculation base, amount, source, and effective date |
| Excluded lines | AD/CVD, fees, inland freight, tax, or other items not included in the quoted number |
| Approval | Importer or adviser, date, open issue, and validity trigger |
Set approval gates and refresh triggers
Under 19 U.S.C. 1484, the importer of record must use reasonable care to make entry, classify and value the merchandise, and provide required information. The foreign supplier's role is to provide accurate, complete, and timely facts, not to replace the importer's decision. [8]
- Refresh the worksheet when the product, material, supplier, producer, exporter, origin process, price, assists, quantity, Incoterm, or planned entry date changes.
- Refresh it when a new HTS revision, Chapter 99 action, exclusion decision, AD/CVD instruction, or ruling affects the scenario.
- Escalate uncertain classification before relying on the number in a firm quote. CBP's binding-ruling program can provide a prospective classification decision on a fully described transaction, but a ruling does not freeze future duty-rate changes. [3]
- Keep the evidence, source snapshots or links, calculation, reviewer comments, and quote revision together under one scenario identifier.
- 1
Supplier fact approval
Engineering and finance confirm product construction, manufacturing locations, parties, price, assists, quantity, and commercial terms.
- 2
Importer review
The proposed importer validates classification, value, origin, trade measures, and the assumptions used in its entry scenario.
- 3
Commercial release
Sales states what the quoted price includes, what remains outside the price, and what change will require re-quotation.
Glossary
- Ad valorem duty
- A duty calculated as a percentage of the applicable customs value.
- Chapter 99
- The HTS chapter containing temporary, additional, suspended, or modified tariff provisions and related instructions.
- Classification
- The legal process of assigning imported merchandise to the applicable HTS provision.
- Customs value
- The value basis determined under U.S. customs rules for duty and entry purposes, which may require additions or adjustments to invoice price.
- HTS
- The Harmonized Tariff Schedule of the United States used to classify imported merchandise and identify tariff treatment.
- Importer of record
- The party responsible for making entry and meeting the associated U.S. customs obligations.
- Reasonable care
- The statutory standard requiring the importer to take appropriate steps when entering, classifying, valuing, and documenting merchandise.
- Specific duty
- A duty calculated as an amount per stated quantity, weight, volume, or other unit.
- Country of origin
- The country legally attributed to the imported article under the rule applicable to the customs question at issue.
- Binding ruling
- A prospective CBP decision based on the complete facts presented by an eligible requester.
FAQ
Can we calculate U.S. duty from a product name?
Is the 10-digit HTS code our U.S. buyer gave us automatically correct?
Does a zero base rate mean the shipment enters duty free?
How do we check Section 301 tariffs on China-origin goods?
Does an HTS code prove that our product is subject to AD/CVD?
Can a CBP binding ruling lock the duty rate for the life of a program?
Should the supplier promise a landed-duty amount in the quote?
Who is responsible if the supplier provides the product facts?
When should we request a binding ruling?
Primary sources
This guide prioritizes first-party U.S. government, standards-body, and rule-publisher sources. Recheck live sources before acting on a current shipment or contract.
- [1]U.S. International Trade Commission. Harmonized Tariff Schedule of the United States
- [2]U.S. Customs and Border Protection. Harmonized Tariff Schedule general information
- [3]U.S. Customs and Border Protection. Binding Ruling Program
- [4]U.S. Customs and Border Protection. How to request a binding ruling
- [5]Office of the U.S. Trade Representative. How to Navigate the Section 301 Tariff Process
- [6]U.S. Customs and Border Protection. Section 301 Trade Remedies Frequently Asked Questions
- [7]U.S. Department of Commerce. Antidumping and Countervailing Duty Frequently Asked Questions
- [8]U.S. House Office of the Law Revision Counsel. 19 U.S.C. 1484, Entry of merchandise
This guide provides general business information, not legal, customs, tax, product-certification, or compliance advice. The U.S. importer, licensed broker, counsel, and relevant specialists should review the facts of a specific product and transaction.