How to Calculate China Tariffs: 2026 Verification Guide

A defensible China tariff calculation begins with the exact product and the current official tariff record. It does not begin with a generic percentage copied from a search result. This 2026 revision gives you the source sequence, formulas, and audit fields to verify before filing.

TL;DR — verified 2026-08-26

• Classify the product before selecting a rate.
• Check the current HTS and Chapter 99 notes, then check each applicable China program separately.
• The USTR July 2026 notice states a 12.5% China rate for its specific forced-labor Section 301 action, subject to scope and exceptions.
• Keep duty, fees, freight, insurance, brokerage, and delivery in separate rows.

Start with the exact product, not a headline rate

A China tariff calculation is a classification-and-scope exercise. Start with the product’s materials, function, condition, composition, and intended use. Then identify the correct HTS subheading and read the associated notes. A product name alone is not enough to select a duty rate.

Use the current official source sequence

Step	Input	Output to save
1. Classify	Product description and technical facts	HTS subheading and rationale
2. Check base duty	Current USITC HTS release	General rate and revision date
3. Check China Section 301	USITC China Tariffs reference and USTR exclusions	Applicable list, exclusion, or no match
4. Check forced-labor Section 301	USTR final notice and CBP guidance	Scope, rate, entry-date treatment, exceptions
5. Check other programs	Chapter 99 notes, CBP, Commerce/ITA and Federal Register	Any additional trade-remedy treatment

Current 2026 checkpoint

The USTR final notice dated July 23, 2026 states that products of China receive a 12.5% additional tariff under that specific forced-labor Section 301 action, except where its annexes provide otherwise. CBP’s guidance says the action applies to covered entries on or after July 24, 2026, subject to the notice’s terms and a limited in-transit exception. The USITC China Tariffs document updated July 28, 2026 is a separate reference for the older technology-transfer Section 301 action and says it does not include the forced-labor headings.

Therefore, keep these lines separate in the worksheet. Do not add the 12.5% forced-labor line blindly to every product, and do not use the older USITC China list as if it contains the new program.

Write the calculation as variables

base duty = customs value × current general rate

program duty = customs value × each applicable additional rate

duty estimate = base duty + program duties

Keep merchandise-processing fees, harbor fees where applicable, brokerage, freight, insurance, storage, and delivery in separate rows. Label the result as an estimate until a qualified broker confirms the classification and entry facts. If the product is subject to a different program, the formula must reflect that program’s legal notes rather than a generic stack.

Make the worksheet audit-ready

• record the source URL and revision date for every rate;
• save the product facts used for classification;
• write the assumed country of origin and entry date;
• attach exclusions, rulings, or broker instructions;
• show which fields remain unverified.

Use the US customs guide for process context and request a freight comparison when you are ready to add transport and delivery costs.

Frequently asked questions

How do I calculate China import tariffs?

Classify the product, verify the current HTS rate, check each applicable Chapter 99 program, confirm origin and entry date, then add fees and freight separately.

Does the 12.5% 2026 rate apply to every China product?

No. The USTR notice’s 12.5% additional tariff is subject to its scope, annexes, exceptions, and entry-date rules; verify the exact product and entry.

Can a freight forwarder guarantee my duty rate?

A forwarder can help organize documents and logistics, but the importer and qualified customs adviser must confirm classification and applicable duties for the entry.

Sources checked 2026-08-26: USTR final notice; CBP CSMS guidance; USITC China Tariffs reference