U.S. Halves Aluminum Import Tariffs to 25% for Companies Building Factories Domestically
Miles Bennett
Trump signed an order cutting aluminium import tariffs from 50% to 25% for companies that build smelters in the US, on condition they break ground before 2029 — a tariff discount in exchange for capacity, but the structural supply gap will not close quickly.
What exactly does the tariff cut entail?
Trump signed a proclamation on July 20 under Section 232: companies that build, expand, or refurbish aluminium smelters in the US — and receive government approval — see their raw-aluminium import tariff drop from 50% to roughly 25%.
The hard condition: projects must commit to breaking ground before January 20, 2029.
This means → it is not a broad tariff reduction. It is a swap — build capacity first, then get relief. The baseline 50% tariff stays for everyone else.
Why is this policy coming now?
The US has severely limited domestic primary-aluminium capacity and relies heavily on imports from Canada and the Middle East.
Last June, Washington raised steel and aluminium tariffs from 25% to 50% on all trading partners except the UK, aiming to force capacity back onshore. It largely failed.
In plain terms = the 50% tariff made imports more expensive, but domestic smelters did not follow — the bottleneck is not just price signals but build timelines and capital commitment.
What damage has the high tariff already done?
Driven by tariffs and Middle Eastern conflict, the US Midwest aluminium premium has nearly doubled, saddling American manufacturers with the highest raw-material costs globally.
Appliance, beverage-can, and auto producers have shifted to "just-in-time" purchasing, holding only minimum inventory to dodge price swings.
This reflects a downstream sector too squeezed to stockpile — companies are sacrificing supply security to protect cash flow.
How did the market react?
Before the announcement, LME aluminium edged lower to $3,140. After the news broke, it rebounded 0.66% to $3,160.76.
Analysts say the incentive plan could ease supply tightness in the medium-to-long term — if it attracts real investment.
But the US aluminium market's structural supply-demand gap will not close quickly. A smelter takes years to build, and the tariff-relief window shuts in 2029.
Content is for reference only, not financial advice.