9903.88.01—Section 301 List 1
Published rate notation
The duty provided in the applicable subheading plus 25%
Active for entries on or after 2018-07-06; no expiration is on file.
Tandom · Duty calculator
Check this provision by entry date
Pick a mapped 10-digit code and enter origin, value, and entry date. The calculator determines which Chapter 99 measures apply to that scenario; it does not force this provision into the result.
Plain-English explanation
HTS 9903.88.01 is a Chapter 99 tariff modification under Section 301 List 1. For a qualifying entry during this provision's effective period, the published rate notation is the duty provided in the applicable subheading plus 25%; the source instructions determine how that notation relates to the underlying base duty. Its published country scope lists CN. Active for entries on or after 2018-07-06; no expiration is on file. Tandom maps 1,816 base HTS codes to this provision for catalog screening; a dated calculator scenario determines whether it applies.
Illustrative rate mechanics for a qualifying entry
This catalog record does not establish an additive rate relationship, so the page preserves the published notation without adding it to the base rate. Active for entries on or after 2018-07-06; no expiration is on file. The calculator checks the selected entry date and shipment facts before including any Chapter 99 provision.
Description
Authoritative scope text from the U.S. Harmonized Tariff Schedule
Except as provided in headings 9903.88.05, 9903.88.06, 9903.88.07, 9903.88.08, 9903.88.10, 9903.88.11, 9903.88.14, 9903.88.19, 9903.88.50, 9903.88.52, 9903.88.58, 9903.88.60, 9903.88.62, 9903.88.66, 9903.88.67, 9903.88.68, or 9903.88.69, articles the product of China, as provided for in U.S. note 20(a) to this subchapter and as provided for in the subheadings enumerated in U.S. note 20(b) [to this subchapter]
How to use this provision
Filing mechanics during the provision's effective period
Chapter 99 provision 9903.88.01 is a tariff modification — it doesn't classify a product on its own. When a base 10-digit HTS code falls within this provision's scope during its effective period and a shipment matches the country and date conditions, the broker declares the base code at entry and follows the source instructions for reporting 9903.88.01 on a separate line.
Worked example
Published notation shown without assuming an additive rate
For an illustrative $10,000.00 entry during a period when this provision is in effect, assume an importer files 0106.11.00.00 (primates) from a country in the published scope and all product conditions are met. The published rate notation is The duty provided in the applicable subheading plus 25% and the base HTSUS rate is Free. The catalog does not carry a structured additive relationship for this provision, so this example does not add the displayed percentage to the base rate. Active for entries on or after 2018-07-06; no expiration is on file.
No numeric total is shown because a published percentage alone does not establish whether the provision is additive, total, or otherwise conditional. Use the calculator for a dated scenario.
Opens the Tandom calculator with HTS 0106.11.00.00 pre-filled. Confirm the country, shipment value, and entry date to build an itemized duty and customs-fee estimate.
Target countries
Published country scope for entries during the provision's effective period
Mapped base HTS codes(1816)
Showing the first 50 of 1,816 mapped codes (alphabetical).
0106.11.00.00PrimatesFree0304.72.10.00Skinned, whether or not divided into pieces, and frozen into blocks each weighing over 4.5 kg, imported to be minced, ground or cut into pieces of uniform weights and dimensionsFree0304.72.50.00OtherFree0304.83.10.10Greenland turbot (Greenland halibut) (Reinhardtius hippoglossoides)Free0304.83.10.15SoleFree0304.83.10.20FlounderFreeRelated Chapter 99 codes(24)
Other Section 301 List 1 provisions in Tandom's catalog
9903.05.01Except for products described in headings 9903.05.02–9903.05.09, articles the product of Brazil, as provided for in subdivision (a) of U.S. note 50 to this subchapterActive9903.05.02Articles the product of Brazil that (1) were loaded onto a vessel at the port of loading and in transit on the final mode of transit prior to entry into the United States before 12:01 a.m. eastern time on July 22, 2026; and (2) are entered for consumption, or withdrawn from warehouse for consumption, before 12:01 a.m. eastern time on July 29, 2026Expired9903.05.03Articles the product of Brazil, as provided for in subdivision (a)(ii) of U.S. note 50 to this subchapterActive9903.05.04Articles the product of Brazil, as provided for in subdivision (a)(iii) of U.S. note 50 to this subchapterFrequently asked questions
What is HTS 9903.88.01?
HTS 9903.88.01 is a Chapter 99 tariff modification under Section 301 List 1, not a product classification. Its published scope describes when it can modify the duty treatment of a base 10-digit HTS code. Scope text: Except as provided in headings 9903.88.05, 9903.88.06, 9903.88.07, 9903.88.08, 9903.88.10, 9903.88.11, 9903.88.14, 9903.88.19, 9903.88.50, 9903.88.52, 9903.88.58, 9903.88.60, 9903.88.62, 9903.88.66, 9903.88.67, 9903.88.68, or 9903.88.69, articles the product of China, as provided…
What rate does HTS 9903.88.01 apply?
The provision's published rate notation is: "The duty provided in the applicable subheading plus 25%" Tandom's catalog does not identify this record as an additive rate, so consult the source instructions for how the notation relates to the base HTSUS rate. Use the Tandom calculator for a dated scenario.
What country scope is listed for HTS 9903.88.01?
The published country scope for 9903.88.01 lists: CN.
Is HTS 9903.88.01 currently active?
Learn more
Tandom guides relevant to this code
Section 301 China tariff exclusions in 2026
What the 178 active Section 301 exclusions cover, how to claim 9903.88.69 on an entry, and what changes when the November 10, 2026 deadline passes.
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How Chapter 99 tariff layers stack on a single entry
How to read, order, and report Chapter 99 HTS codes alongside the base classification on a US entry summary in 2026. The full stacking ladder for brokers and compliance teams.
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