CHAPTER 99 · TRADE MEASURE CODE

9903.91.01

Active

9903.91.01 implements Section 301 on goods of China origin, adding +25% on top of the base HTS duty. It is effective September 27, 2024.

Data provenance: Rates from HTS Revision 19 (Sep 16, 2026); trade measures verified against CBP CSMS and Federal Register notices through Sep 3, 2026.

Additional rate

+25%

Status

Active

Applies to

China

Base codes paired

1,001

What 9903.91.01 implements

Effective with respect to entries on or after September 27, 2024, articles the product of China, as provided for in subdivision (b) of U.S. note 31 to this subchapter

HTS legal text: Effective with respect to entries on or after September 27, 2024, articles the product of China, as provided for in subdivision (b) of U.S. note 31 to this subchapter

Effective window: effective September 27, 2024
Glossary: Section 301 → All Section 301 codes →

Base HTS codes 9903.91.01 pairs with

Showing 30 of 1,001 linked base codes. Open a base code, then add /from/<country> to see the computed duty.

2602.00.00 Manganese ores and concentrates, including ferruginous manganese ores and concentrates with a manganese content of 20 percent or more, calculated on the dry weight 2602.00.00.40 Containing less than 47 percent by weight of manganese 2602.00.00.60 Containing 47 percent or more by weight of manganese 2605.00.00.00 Cobalt ores and concentrates 2606.00.00 Aluminum ores and concentrates 2606.00.00.30 Refractory grade 2606.00.00.60 Other 2606.00.00.90 Other 2608.00.00 Zinc ores and concentrates 2608.00.00.10 Copper content 2608.00.00.20 Lead content 2608.00.00.30 Zinc content 2608.00.00.40 Silver content 2608.00.00.50 Gold content 2610.00.00 Chromium ores and concentrates 2610.00.00.20 Having a chromium content equivalent to not more than 40 percent chromic oxide (Cr2O3) 2610.00.00.40 Having a chromium content equivalent to more than 40 percent but less than 46 percent chromic oxide (Cr2O3) 2610.00.00.60 Having a chromium content equivalent to 46 percent or more chromic oxide (Cr2O3) 2611.00.60.00 Concentrates 2825.90.30.00 Tungsten oxides 2841.80.00 Tungstates (wolframates) 2841.80.00.10 Of ammonium 2841.80.00.20 Of calcium 2841.80.00.50 Other 2844.41.00.00 Tritium and its compounds; alloys, dispersions (including cermets), ceramic products and mixtures containing tritium or its compounds 2844.42.00.00 Actinium-225, actinium-227, californium-253, curium-240, curium-241, curium-242, curium-243, curium-244, einsteinium-253, einsteinium-254, gadolinium-148, polonium-208, polonium-209, polonium-210, radium-223, uranium-230 or uranium-232, and their compounds; alloys, dispersions (including cermets), ceramic products and mixtures containing these elements or compounds 2844.43.00 Other radioactive elements and isotopes and compounds; other alloys, dispersions (including cermets), ceramic products and mixtures containing these elements, isotopes or compounds 2844.43.00.10 Elements, isotopes and compounds with cobalt-60 radioactivity only 2844.43.00.21 Americium-241, californium-252, cesium-137, gadolinium-153, idium-192, promethium-147, radium-226, selenium-75, or ytterbium-169 2844.43.00.28 Other

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Frequently asked questions

What is 9903.91.01?

9903.91.01 is a U.S. Harmonized Tariff Schedule Chapter 99 subheading that implements Section 301 on goods of China origin. It adds +25% on top of the duty in the underlying base HTS subheading. It is effective September 27, 2024.

Does 9903.91.01 apply to 2602.00.00?

2602.00.00 (Manganese ores and concentrates, including ferruginous manganese ores and concentrates with a manga…) is among the base HTS codes linked to 9903.91.01. Whether the measure is owed on a specific entry also depends on the country of origin (Section 301 applies to China) and any applicable exclusion. See the duty-by-origin page for the computed rate.

Where does this come from, and how current is it?

Rates from HTS Revision 19 (Sep 16, 2026); trade measures verified against CBP CSMS and Federal Register notices through Sep 3, 2026.

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