Section 232 aluminum tariffs (25%)
National-security tariffs on aluminum, expanded in lockstep with steel: 50% from June 2025 for all origins, derivative coverage broadened repeatedly, duties assessed on full customs value since April 2026, and — since Proclamation 11032 — a 25% base rate from June 8, 2026 through December 31, 2027 with a 15% combined floor for listed partners and a 15% transitional rate for certain equipment. A July 2026 proclamation lets companies building U.S. primary-aluminum capacity import at half the rate. Unaffected by the Supreme Court's IEEPA ruling.
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Timeline
- Under reviewFederal Register
Commerce proposes 14 more derivative categories
BIS requests comments on adding derivative articles — including electrical cables, heat exchangers, safes, fire extinguishers, welding-equipment components, cranes and trailers — to the Section 232 steel, aluminum and copper duties. Comments closed August 27, 2026; no implementing notice has been published yet.
Official sources - In effectExecutive order
Half-rate incentive for onshoring primary aluminum
Proclamation 11045 lets companies with approved plans to build U.S. primary-aluminum capacity (construction to start by January 20, 2029) import primary aluminum at half the Section 232 rate, up to their planned annual output.
Official sources - In effectFederal Register
Base rate reset to 25%
Proclamation 11032 sets the aluminum rate at 25% (from 50%) from June 8, 2026 through December 31, 2027, with a 15% combined floor for listed partners, the transitional 15% rate extended to more equipment, and the U.S.-content threshold lowered to 85%.
Official sources - In effectFederal Register
Taiwan aircraft components removed from derivative duties
Implementing the U.S.–Taiwan agreement, derivative Section 232 steel, aluminum and copper duties no longer apply to aircraft components that are products of Taiwan (new heading 9903.96.03).
Official sources - In effectFederal Register
Rate doubled to 50%
Proclamation raises the aluminum tariff to 50% for all origins except the United Kingdom (25%).
Official sources - ReinstatedFederal Register
Rate raised to 25%, exemptions ended
February 2025 proclamation raises aluminum tariffs from 10% to 25% and ends country exemptions.
Official sources
Official sources
- Proclamation raising steel and aluminum tariffs to 50% · 90 FR 24199
- June 2026 proclamation further adjusting metals tariffs · 91 FR 34085
- Proclamation 11045: Further Strengthening Actions Taken To Adjust Imports of Aluminum
- BIS request for comments on additional derivative articles (August 2026)
- Implementation of the U.S.–Taiwan agreement (aircraft components) · 91 FR 31818
Status verified 09/10/2026
Related measures
Section 232 steel tariffs (25%)
National-security tariffs on steel, in place since 2018 and sharply expanded in 2025–26: the rate doubled to 50% in June 2025, country exemptions ended, the duty base now covers the full customs value of derivative articles, and hundreds of downstream products were added. Proclamation 11032 reset the base rate to 25% from June 8, 2026 through December 31, 2027, with a 15% combined floor for listed partners including the EU, UK, Japan and Korea and a 15% transitional rate for certain metal-intensive equipment. Unaffected by the Supreme Court's IEEPA ruling.
Current rate: 25% on steel articles and derivatives (reduced from 50% on June 8, 2026, through December 31, 2027); 15% combined floor for the EU, UK, Japan, Korea, Taiwan, Switzerland, Liechtenstein, Argentina, Ecuador, El Salvador and Guatemala; 10% for derivatives made entirely (at least 85% by weight) from U.S.-smelted steel; USMCA goods dutied on non-U.S. content with a 15% floor
Expires by law:Section 232 copper tariffs (50%)
50% tariffs on semi-finished copper and copper-intensive derivative products, effective August 2025 — the first Section 232 action on copper. The regime was folded into the unified metals framework in 2026: expanded coverage in April, further adjustments and a 15% transitional rate for certain categories in June, running through December 31, 2027.
Current rate: 50% on semi-finished copper and most derivatives; some categories at 25% or the 15% transitional rate
Expires by law:Section 232 automobile and auto-parts tariffs (25%)
25% tariffs on imported passenger vehicles and light trucks since April 2025, extended to key auto parts in May 2025. USMCA-qualifying vehicles are tariffed only on non-U.S. content, and an import-adjustment offset phases down support for U.S. assemblers. Unaffected by the IEEPA ruling.
Current rate: 25% on passenger vehicles, light trucks, and listed auto parts