Aluminum outlook: a pullback to use while the duty keeps landed cost high
Aluminum prices are below their June high but still well above a year ago, and imports carry a 50% duty. How the aluminum market works and why now is a window to re-quote.
Re-quote contracts priced at the spring peak and ask for index-linked terms going forward.
◷ Now, while prices sit below the June highKey takeaways
- Aluminum mill shape prices were 5.9% below their June high in August but still 27.3% above a year earlier.
- Imports carry a 50% Section 232 duty on full customs value, which keeps imported landed cost elevated even as prices ease.
- ISM respondents still listed aluminum among commodities rising in price in September.
- Our move: re-quote contracts priced at the spring peak and move to index-linked terms going forward.
How the aluminum market works
Aluminum reaches procurement teams as sheet, plate, extrusions, castings or as part of finished components. Its price has two layers. The first is the metal itself, traded on global exchanges. The second is a regional premium that reflects the cost of delivering metal to a market, including freight and duties. In the U.S., that premium is commonly called the Midwest premium. Fabricators then add a conversion charge for rolling, extruding or casting.
That structure is useful for buyers: it lets you separate the part of the price that moves with the market (metal plus premium) from the part that reflects the supplier’s own costs and margin (conversion). Contracts that bundle everything into one fixed price make it hard to tell whether an increase reflects metal or margin.
What is driving prices now
The duty. Imports of most aluminum articles carry a 50% Section 232 duty on full customs value. Because the U.S. imports a large share of its aluminum, the duty feeds through to the domestic price via the regional premium, not just to imported parts.
A pullback from the peak. U.S. producer prices for aluminum mill shapes were 5.9% below their June high in August, though still 27.3% above a year earlier, according to our Cost Pressure Monitor. The three-month pace was negative.
Still rising for many manufacturers. In ISM’s September survey, respondents still listed aluminum among commodities rising in price and cited steel and aluminum among the main drivers of higher costs. That gap, with the index easing while purchasing managers report increases, usually means suppliers are still passing through increases set earlier.
Where the negotiating leverage sits
Balanced. Easing prices give procurement teams a case to re-open contracts priced near the spring high. The duty and firm demand limit how far suppliers will move. Teams that can show the index decline and separate metal from conversion are in the strongest position.
Supply risk: what could go wrong
- Tariff changes that move the regional premium quickly.
- Energy costs at smelters, which matter because aluminum production is very power-intensive.
- Extrusion and casting capacity, which can tighten even when metal is available.
How to buy it now
- Re-quote anything priced at the spring peak. Use the decline since June to ask for a reset, with the index data in hand.
- Split metal from conversion. Price metal and premium off a published benchmark; negotiate the conversion charge on its own.
- Set the review period. Monthly or quarterly metal adjustments keep price close to market.
- Compare domestic and imported landed cost. Add the 50% duty to imported quotes.
- Keep a second source for critical extrusions. Conversion capacity, not metal, is often the bottleneck.
What to watch
- Whether the three-month decline continues in the next producer price releases.
- Changes to Section 232 coverage or country agreements.
- Regional premium moves, which show how much of the duty is reaching domestic prices.
Price trend
U.S. producer price index for aluminum mill shapes (BLS series WPU102501), data through Aug 2026. Tariff note: Section 232: 50% on most aluminum articles, full customs value. Full price history.
Our coverage of aluminum
- Steel, ocean freight and diesel lead input-cost pressure; resins and chips are easingOur new Cost Pressure Monitor tracks 12 categories procurement teams buy most. Seven are rising, led by steel and deep-sea freight, while aluminum, plastic resins and semiconductors have turned lower.
- USMCA wasn't renewed at its first review. Here's what annual reviews through 2036 mean for North American sourcingThe U.S. declined to extend the agreement on July 1, so the three countries now review it every year. The pact stays in force until 2036, but auto rules of origin, steel and aluminum are open for negotiation.
Questions procurement teams ask
Are aluminum prices going down?
U.S. producer prices for aluminum mill shapes were 5.9% below their June high in August, but 27.3% above a year earlier. The three-month trend was down, which is why we see a window to re-quote.
What is the Midwest premium in aluminum pricing?
U.S. aluminum is usually priced as a global exchange price plus a regional delivery premium, often called the Midwest premium, which reflects the cost of getting metal to U.S. buyers, including duties. Tariffs tend to show up in that premium.
How should aluminum contracts be priced?
Most buyers price the metal content off a published aluminum benchmark plus the regional premium, with a separate fixed conversion charge for rolling or extrusion. That way, metal price changes pass through in both directions while conversion is negotiated.
Sources
- Procurement Signal — Input-cost pressure report
- Procurement Signal — September ISM report
- U.S. Bureau of Labor Statistics via FRED — Aluminum mill shapes (WPU102501)
Leverage, supply risk and the recommended move are Procurement Signal's editorial assessment, built from the sources above. This is general market analysis, not advice on a specific contract. See our editorial standards.