Section 232 Tariff Calculator 2026 — Steel, Aluminum & Copper Duty on Full Value
Since April 6, 2026 the Section 232 duty is charged on the full customs value, not the metal content (Proclamation 11021). Entering on the old content basis under-pays the duty — a negligent under-declaration can cost up to 2× the lost duty (19 U.S.C. 1592).
Who this is for: US importers of record, Amazon and Shopify sellers and small manufacturers bringing in steel, aluminum or copper goods. When: goods entered for consumption on or after 12:01 a.m. EDT, April 6, 2026. What changed: the 232 duty used to apply only to the steel content of Chapter 73 articles and the aluminum content of Chapter 76 articles (Proclamation 10947, June 4, 2025); now it applies to the full customs value, regardless of metal content.
Your numbers
Your result
Section 232 rate applied
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Section 232 duty on full customs value
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Column 1 (MFN) duty
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Other Chapter 99 duty
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Total duty on this entry line
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Old content basis: 50% of metal content (until April 5, 2026)
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Extra Section 232 duty vs the content basis
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Penalty ceiling if entered on the content basis (2x lost duty, 19 U.S.C. 1592(c)(3))
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Landed cost of the entry line
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Landed cost per unit
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Price rise per unit vs content-basis costing
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Duty as a share of landed cost
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Which Section 232 tier is yours?
50% — Annex I-A: aluminum and steel articles, most copper articles, certain derivatives (Proclamation 11021, clause 2(a)).
25% — Annex I-A products of the United Kingdom with UK-melted steel or UK-smelted aluminum (clause 2(b)).
25% — Annex I-B: certain copper articles and aluminum or steel derivatives (clause 3(a)); 15% for UK products (clause 3(b)).
10% — derivatives whose metal was melted or smelted in the US; since June 8, 2026 that means at least 85% of the metal by weight (June 1, 2026 proclamation, clause 4).
Annex III: MFN + 232 = 15% total, 0% extra if MFN is already 15% or more, 25% for countries without normal trade relations — until December 31, 2027 (clause 5).
Annex I-C (from June 8, 2026): 25%, or the 15% total rule for Argentina, Ecuador, El Salvador, Guatemala, Japan, Korea, Liechtenstein, Switzerland, Taiwan, the UK and EU members; USMCA goods pay 25% on non-US content, at least 15% in total.
Annex II goods are no longer subject to the 232 duty (clause 4). Russian aluminum stays at 200% (clause 8).
Sources: Proclamation of April 2, 2026 (Strengthening Actions Taken to Adjust Imports of Aluminum, Steel, and Copper); Proclamation of June 1, 2026 (Further Adjusting the Tariff Regimes…); Proclamation 10947 of June 3, 2025; 19 U.S.C. 1592(c)(3). Look up your HTS code's Column 1 rate and Annex in the current HTSUS chapter 99 before you file. This is a calculation aid, not legal advice.