9903.78.01—Section 232 Copper
Overlay rate
50% ad valorem
Stacks on top of the base HTSUS rate of the product
Tandom · Duty calculator
See this overlay in a real duty stack
Pick a covered 10-digit code below, plug in country and invoice value, and Tandom will compute the full landed cost with this overlay stacked on the base rate.
Plain-English explanation
HTS 9903.78.01 is a Chapter 99 copper derivative tariff modification under Section 232 Copper. When a base 10-digit code falls within this provision's scope, it imposes 50% ad valorem on top of the underlying base duty. It applies universally to imports from every country, except as carved out by parallel provisions or country-specific exclusions. It has been in effect since 2025-08-01 with no expiration on file. It currently covers 118 base HTS codes in Tandom's catalog.
Rate stack at entry
Description
Authoritative scope text from the U.S. Harmonized Tariff Schedule
Section 232 Copper — 50% ad valorem on copper content of semi-finished copper products (Note 35: headings 7406-7413) and copper derivative products (Note 36(b): headings 7415, 7418, 7419, plus 8544.42/49)
How to use this provision
When and how this overlay shows up at entry
Chapter 99 provision 9903.78.01 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 and a shipment matches the country and date conditions, the broker declares the base code at entry, then references 9903.78.01 on a separate line so its rate stacks on top.
Worked example
How this overlay applies to a real covered code
Imagine an importer files a $10,000.00 shipment of 7406.10.00.00 (powders of non-lamellar structure) from a country in scope. The overlay rate of 50% ad valorem stacks on top of the base HTSUS rate of Free.
Base duty
$0.00
Free × $10,000.00
This overlay
$5,000.00
50% × $10,000.00
Total duty
$5,000.00
Plus AD/CVD if applicable
Opens the Tandom calculator with HTS 7406.10.00.00 and $10,000.00 pre-filled — add a country to compute the full landed cost.
Target countries
Applies universally to imports from all countries
All countries
Affected base HTS codes(118)
Showing the first 50 of 118 covered codes (alphabetical).
7406.10.00.00Powders of non-lamellar structureFree7406.20.00.00Powders of lamellar structure; flakesFree7407.10.15.00Hollow profiles3%7407.10.30.00Other3%7407.10.50.10Having a rectangular cross section1%7407.10.50.50Other1%7407.21.15.00Hollow profiles2.2%7407.21.30.00Other2.2%7407.21.50.00Low fuming brazing rods2.2%7407.21.70.00Having a rectangular cross section1.9%7407.21.90.00Other2.2%7407.29.16.10Of copper-nickel base alloys (cupro-nickel) or copper-nickel-zinc base alloys (nickel silver)3%7407.29.16.80Other3%7407.29.34.00Of copper-nickel base alloys (cupro-nickel) or copper-nickel-zinc base alloys (nickel silver)3%7407.29.38.00Other3%7407.29.40.00Bars and rods of copper-nickel base alloys (cupro-nickel) or copper-nickel-zinc base alloys (nickel silver)3%7407.29.50.00Other bars and rods1.6%7408.11.30.00With a maximum cross-sectional dimension over 9.5 mm1%7408.11.60.00With a maximum cross-sectional dimension over 6 mm but not over 9.5 mm3%7408.19.00.30With a maximum cross-sectional dimension of 3 mm or less3%7408.19.00.60Other3%7408.21.00.00Of copper-zinc base alloys (brass)3%7408.22.10.00Coated or plated with metal3%7408.22.50.00Not coated or plated with metal3%7408.29.10.00Coated or plated with metal3%7408.29.50.00Not coated or plated with metal3%7409.11.10.00Of a thickness of 5 mm or more3%7409.11.50.10Of a width of 500 mm or more1%7409.11.50.50Of a width of less than 500 mm1%7409.19.10.00Of a thickness of 5 mm or more3%7409.19.50.00Of a width of 500 mm or more1%7409.19.90.00Of a width of less than 500 mm3%7409.21.00.10Of a thickness of 5 mm or more1.9%7409.21.00.50Of a width of 500 mm or more1.9%7409.21.00.75Of a thickness less than 1.6 mm1.9%7409.21.00.90Other1.9%7409.29.00.10Of a thickness of 5 mm or more1.9%7409.29.00.50Of a width of 500 mm or more1.9%7409.29.00.75Of a thickness less than 1.6 mm1.9%7409.29.00.90Other1.9%7409.31.10.00Of a thickness of 5 mm or more3%7409.31.50.00Of a width of 500 mm or more1.7%7409.31.90.00Of a width of less than 500 mm3%7409.39.10.30Of phosphor bronze3%7409.39.10.60Other3%7409.39.50.00Of a width of 500 mm or more1.7%7409.39.90.30Of phosphor bronze3%7409.39.90.60Other3%7409.40.00.00Of copper-nickel base alloys (cupro-nickel) or copper- nickel-zinc base alloys (nickel silver)3%7409.90.10.30Of beryllium copper3%Related Chapter 99 codes(24)
Other Section 232 Copper provisions in Tandom's catalog
9903.40.05Radial tires of a kind used on motor cars (other than racing cars), station wagons, sport utility vehicles, vans and on-the-highway light trucks (provided for in subheading 4011.10.10 or 4011.20.10)9903.40.10Other tires of a kind used on motor cars (other than racing cars), station wagons, sport utility vehicles, vans and on-the-highway light trucks (provided for in subheading 4011.10.50 or 4011.20.50)9903.74.01Medium- and heavy-duty vehicles as provided for in subdivision (b) of U.S. note 38 to this subchapter.9903.74.02Buses and other vehicles classified in HTSUS heading 8702 as provided for in subdivision (c) of U.S. note 38 to this subchapter.9903.74.03Medium- and heavy-duty vehicles, as provided for in subdivision (d) of U.S. note 38 to this subchapter.9903.74.05Articles as provided for in subdivision (e) of U.S. note 38 to this subchapter.9903.74.06Articles as provided for in subdivision (f) of U.S. note 38 to this subchapter.9903.74.07Medium- and heavy-duty vehicles, as provided for in subdivision (g) of U.S. note 38 to this subchapter.9903.74.08Medium- and heavy-duty vehicle parts, as provided for in subdivision (i) of U.S. note 38 to this subchapter.9903.74.09Medium- and heavy-duty vehicle parts, as provided for in subdivision (j) of U.S. note 38 to this subchapter.9903.74.10Articles as provided for in subdivision (k) of U.S. note 38 to this subchapter9903.74.11Section 232 MHDV Non-Stacking — articles in Note 38(i) auto parts scope that are NOT parts of medium- or heavy-duty vehicles. 0% additional duty. Proclamation 10984.9903.76.01Softwood timber and lumber products provided for in subdivision (b) of U.S. note 37 of this subchapter9903.76.02Upholstered wooden furniture products provided for in subdivision (d) of U.S. note 37 of this subchapter9903.76.03Completed kitchen cabinets and vanities and parts of kitchen cabinets and vanities provided for in subdivision (f) of U.S. note 37 of this subchapter9903.76.04Articles as provided for in subdivision (g) of U.S. note 37 of this subchapter9903.76.20Wood products of the United Kingdom as provided for in subdivisions (d) and (f) of U.S. note 37 of this subchapter9903.76.21Wood products of Japan as provided for in subdivisions (d) and (f) of U.S. note 37 of this subchapter9903.76.22Wood products of the European Union as provided for in subdivisions (d) and (f) of U.S. note 37 of this subchapter9903.76.23Wood products of South Korea as provided for in subdivisions (d) and (f) of U.S. note 37 of this subchapter9903.78.02Section 232 Copper — non-copper content remainder of articles classifiable under Notes 35/36(b)9903.79.01Semiconductor articles as provided for in subdivisions (a) and (b) of U.S. note 39 to this subchapter.9903.79.02Articles as provided for in subdivision (c) of U.S. note 39 to this subchapter.9903.79.03Semiconductor articles, as defined in subdivision (b) of U.S. note 39 to this subchapter, that are for use in U.S. data centers, as defined in subdivision (d) of U.S. note 39 to this subchapter.Companion + supersession
How this provision interacts with other Chapter 99 codes
Companion code
Files together with 9903.78.02 — both lines appear on the entry summary.
Frequently asked questions
What is HTS 9903.78.01?
HTS 9903.78.01 is a Chapter 99 tariff modification under Section 232 Copper. It is not a product classification — it's an overlay code that stacks on top of a base 10-digit HTS code at entry. Scope text: Section 232 Copper — 50% ad valorem on copper content of semi-finished copper products (Note 35: headings 7406-7413) and copper derivative products (Note 36(b): headings 7415, 7418, 7419, plus 8544.42/49)
What rate does HTS 9903.78.01 apply?
The provision states: "50% ad valorem" That rate stacks on top of whatever the base HTSUS rate is for the underlying 10-digit code. Use the Tandom calculator to compute the full landed cost for any covered product.
Which countries does HTS 9903.78.01 apply to?
9903.78.01 applies universally to imports from all countries, except as carved out by parallel Chapter 99 provisions or country-specific exclusions referenced in the scope text.
Is HTS 9903.78.01 currently active?
Yes — 9903.78.01 is currently active (effective 2025-08-01) with no expiration on file.
How do I use HTS 9903.78.01 when filing?
9903.78.01 doesn't classify a product on its own. When a base 10-digit HTS code falls within this provision's scope and a shipment matches the country and date conditions, the broker declares the base code at entry, then references 9903.78.01 on a separate line so its rate stacks on top. It currently covers 118 base HTS codes in Tandom's catalog.
Learn more
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