9903.81.91—Section 232 Steel Derivative
Published rate notation
The duty provided in the applicable subheading + a duty of 50% upon the value of the steel content.
Expired for entries on or after 2026-04-05.
Tandom · Duty calculator
Check a historical 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 9903.81.91 is a Chapter 99 steel derivative tariff modification under Section 232 Steel Derivative. For a qualifying entry during this provision's effective period, the published rate notation is the duty provided in the applicable subheading + a duty of 50% upon the value of the steel content; the source instructions determine how that notation relates to the underlying base duty. Its published country scope lists all countries, subject to any carve-outs in parallel provisions or the source text. Expired for entries on or after 2026-04-05. Tandom maps 768 base HTS codes to this provision for catalog screening; a dated calculator scenario determines whether it applies.
Historical or scheduled rate mechanics
This catalog record does not establish an additive rate relationship, so the page preserves the published notation without adding it to the base rate. Expired for entries on or after 2026-04-05. 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 heading 9903.81.92, derivative iron or steel products provided for in the tariff subheadings enumerated in subdivision (n) of note 16 to this subchapter.
How to use this provision
Filing mechanics during the provision's effective period
Chapter 99 provision 9903.81.91 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 9903.81.91 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 0402.99.68.00 (described in general note 15 of the tariff schedule and entered pursuant to its provisions) 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 + a duty of 50% upon the value of the steel content. and the base HTSUS rate is 17.5%. 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. Expired for entries on or after 2026-04-05.
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 0402.99.68.00 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
Published scope: all countries
Mapped base HTS codes(768)
Showing the first 50 of 768 mapped codes (alphabetical).
0402.99.68.00Described in general note 15 of the tariff schedule and entered pursuant to its provisions17.5%0402.99.70.00Described in additional U.S. note 10 to this chapter and entered pursuant to its provisions17.5%0402.99.90.00Other46.3¢/kg + 14.9%2106.90.99.98Other6.4%2710.19.30.50Steam cylinder oils84¢/bbl2711.12.00.20OtherFreeRelated Chapter 99 codes(24)
Other Section 232 Steel Derivative provisions in Tandom's catalog
9903.04.60Except as provided in heading 9903.04.61, patented pharmaceutical articles as provided for in subdivisions (c) and (d) of U.S. note 40 to this subchapter (100%; note 40(d): where the column 1 rate is below 100 percent the sum of the column 1 rate and this additional duty totals 100 percent). Effective 2026-09-29 generally; 2026-07-31 for companies listed in Proclamation 11020 Annex III (company-level — assert via importer review).Not yet in effect9903.04.62Patented pharmaceutical articles that are the product of Japan, of a European Union member country, of South Korea, of Switzerland, or of Liechtenstein as provided for in subdivisions (c) and (f) of U.S. note 40 to this subchapter (15%)Not yet in effect9903.04.63Patented pharmaceutical articles that are the product of the United Kingdom as defined in subdivisions (c) and (g) of U.S. note 40 to this subchapter (+0% per Rev 16; Proc 11020 cl. (3)(c) sets 10% reducing to zero to the extent required by the US-UK agreement)Not yet in effectFrequently asked questions
What is HTS 9903.81.91?
HTS 9903.81.91 is a Chapter 99 tariff modification under Section 232 Steel Derivative, 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 heading 9903.81.92, derivative iron or steel products provided for in the tariff subheadings enumerated in subdivision (n) of note 16 to this subchapter.
What rate does HTS 9903.81.91 apply?
The provision's published rate notation is: "The duty provided in the applicable subheading + a duty of 50% upon the value of the steel content." 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 9903.81.91?
The published country scope for 9903.81.91 lists all countries, subject to carve-outs in parallel Chapter 99 provisions or the source text.
Is HTS 9903.81.91 currently active?
Source
Authoritative citation that established this provision
;proc11021-supersede-2026-04-21
Learn more
Tandom guides relevant to this code
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