Section 232 Aluminum Relief Faces the 45X Phaseout
The Section 232 aluminum program bases relief on expected smelter output. Section 45X requires qualifying production and sale and begins shrinking in 2031. Project teams need a year-by-year model before treating the two incentives as stable support.
Primary lensMetals scope review
Sub-topicSection 232 metals
Evidence base6 records used
Use caseMetals scope exposure
Washington has added an import incentive to domestic smelter economics just as the tax credit for qualifying aluminum enters a finite runway.
The White House Proclamation 11045 on primary aluminum investment directs Commerce to establish the program and authorizes it to approve a primary aluminum onshoring plan. If Commerce approves a plan, it must allow annual reduced-duty imports corresponding to the project's reasonably anticipated output after completion. An approved plan must include a commitment that construction will start by January 20, 2029. The proclamation does not state when the import benefit begins, when it ends, or whether relief can run before commercial output.
Section 45X works from the other end of the project. It is earned through qualifying domestic production and sale. Public Law 119-21 now applies a phaseout percentage to the otherwise available credit amount. That percentage is 75 percent for 2031 production, 50 percent for 2032, 25 percent for 2033, and zero after 2033.
That mismatch is easy to miss when tariff relief and a production credit are grouped together as support for the same smelter. One is tied to a Commerce approval and an import allowance. The other follows actual qualifying output and loses value on a calendar set by statute.
The largest announced project has no public completion or commercial-output date. Traverse has already explained the company file needed to seek the tariff benefit. The next question is whether the project's support model still works in the years when metal reaches the market.
The two incentives reward different events
The Section 232 program starts with a plan. Commerce must consider all relevant factors it deems appropriate. The proclamation lists the construction date, project timeline, milestones, costs, production forecast, and allocation of tariff benefits as examples. An approved company may import primary aluminum at half the Section 232 rate otherwise in effect, subject to an annual quantity linked to expected completed-project output.
The allowance is therefore neither a construction grant nor a production credit. Its value depends on the otherwise applicable tariff, the volume Commerce approves, the eligible imports actually entered, and the period during which Commerce allows the rate adjustment. If any one of those inputs changes, the benefit changes.
Section 45X starts with output. The IRS Section 45X final regulations in Treasury Decision 10010 require an eligible component to be produced by the taxpayer and sold to an unrelated person, with elections available for certain related-party sales. For an applicable critical mineral, the unphased credit is generally 10 percent of eligible production costs.
The final regulations reserved the specific aluminum definition for later action after Treasury and the IRS received competing comments on primary and secondary production, commodity forms, and substantiation. The statute still identifies aluminum purified to the required level as an applicable critical mineral. That leaves a rulemaking issue around the precise qualifying form and production record, even before a new project identifies its claimant, eligible costs, and sales path.
Public Law 119-21 also added eligibility restrictions that cannot be reduced to the phaseout schedule. For taxable years beginning after July 4, 2025, an eligible component cannot include material assistance from a prohibited foreign entity under the statutory cost-ratio test. The law also bars credits for certain specified foreign entity and foreign-influenced entity taxpayers. IRS Notice 2026-15 for 26 U.S.C. 45X prohibited foreign entity safe harbors provides interim cost-ratio, supplier-certification, and substantiation rules while proposed regulations remain pending.
No public record establishes that the Inola venture triggers those limits. Foreign participation alone does not resolve the statutory tests. A credit model still needs the claimant's ownership and control facts, production contracts, input sourcing, material-assistance cost ratio, and supplier certifications or equivalent direct substantiation before it can count any 45X value.
The public project schedule stops before commercial output
The largest announced project provides the clearest test. Century Aluminum's 2025 Form 10-K says the Century and EGA venture expects to start construction in Inola, Oklahoma, by the end of 2026. The filing makes that target subject to detailed engineering, a competitive long-term power agreement, and a definitive joint venture agreement.
The filing does not provide a completion date or first commercial-production date. It says the project is expected to produce 750,000 tonnes annually and that Century will need substantial additional financing. A DOE Announcement 2026-02-10 on the Inola primary aluminum smelter describes a $500 million award and more than 500,000 tons of potential annual output, including about 20,000 tons of high-purity metal. It also gives no opening date.
Those omissions matter more than the announced construction start for the 45X analysis. A project can satisfy the proclamation's 2029 construction deadline and still have no qualifying aluminum production in the years when the credit remains at its full statutory percentage. The public record leaves that timing open, so a valuation cannot assume the full-rate credit will still be available when production begins.
The support stack changes by year
The table below separates the events that control each incentive. It is a decision aid, not a forecast of the Inola project or a statement that Commerce will begin tariff relief before output.
Decision table for a new U.S. primary aluminum smelter using the public record as of July 31, 2026. The legal inputs are White House Proclamation 11045, section 70514 of Public Law 119-21, and Treasury Decision 10010. Commerce rules for the allowance start and duration or a final Treasury aluminum definition would change the entries.
Project period
Section 232 position
Section 45X position
What remains unresolved
Before Commerce approval
No project-specific reduced rate
No project credit without qualifying production and sale
Application window and approval timing
After approval and before output
Start of any reduced-rate imports is not yet specified
No project credit without qualifying production and sale
Benefit start, duration, import origin, and entry procedure
Qualifying output through 2030
Depends on the approval and the Section 232 rate then in effect
100 percent of the otherwise available amount
Aluminum form, claimant, eligible costs, PFE status, and material assistance
Qualifying output in 2031
Depends on the approval and live tariff terms
75 percent of the otherwise available amount
Actual production date, eligible-cost base, and continued eligibility
Qualifying output in 2032
Depends on the approval and live tariff terms
50 percent of the otherwise available amount
Actual production date, eligible-cost base, and continued eligibility
Qualifying output in 2033
Depends on the approval and live tariff terms
25 percent of the otherwise available amount
Actual production date, eligible-cost base, and continued eligibility
Qualifying output after 2033
Depends on the approval and live tariff terms
Zero under the current statutory schedule
Any future change in law or guidance
This schedule changes the question that a finance team should ask. A finance team should calculate the present value of each benefit in the years when the project can actually use it, rather than combine today's tariff and tax rules into one headline number.
A full-rate credit can overstate later operating years
Century already recognizes Section 45X credits for current operations and states in its filing that the law begins reducing the credit by 25 percent each year in 2031, reaching zero in 2034. That disclosure confirms the phaseout is part of the company's current reporting environment, not a remote policy proposal.
For a simple illustration, assume a qualifying producer would otherwise receive a 45X credit equal to 10 dollars on 100 dollars of eligible production costs. The statutory schedule would leave 7.50 dollars for 2031 production, 5 dollars for 2032, 2.50 dollars for 2033, and zero for production after 2033. This is not an estimate for the Inola project. Its eligible-cost base and tax position are not public.
The reduced-duty allowance cannot simply fill that decline dollar for dollar. It operates through qualifying entries allowed to the approved company. Future Commerce procedures may permit a designated representative, as the proclamation's explanatory text contemplates. The economic value can be divided by contract among a producer, importer, and customer, and the proclamation requires Commerce to consider how applicants allocate the benefit.
Section 45X ordinarily follows the taxpayer that produces and sells the qualifying aluminum. The final regulations allow parties to a contract manufacturing arrangement to designate the claimant through an agreement and certification. A joint venture, producer, importer, and customer may therefore receive different portions of the two incentives, subject to facts and contracts that are not yet public.
The financing model needs two independent cases
A credible model should keep the incentives separate until the responsible parties and dates are documented.
The tariff case should identify the approved company and any designated representative permitted by future rules, eligible quantity, expected source countries, otherwise applicable Section 232 rate, benefit start, benefit duration, and contractual allocation. It should also test a lower import volume and a changed tariff rate. The July 23 aluminum-onshoring proclamation record does not yet supply those operating rules.
The 45X case should identify the claimant, the qualifying form and purity, the eligible-cost method, the sale that triggers the credit, and the calendar year of production. It should test taxpayer status, effective-control contracts, input sourcing, material-assistance cost ratio, and supplier certifications or equivalent direct substantiation under the current PFE guidance. It should apply the statutory phaseout percentage for each year rather than extending the current full-rate credit across the project's operating life.
The two cases can then be combined in a project cash flow, but their value should remain traceable to separate events. That prevents an approved import allowance from being treated as production revenue and prevents a tax credit that may shrink before output from being booked as permanent support.
Commerce can close only part of the gap
Commerce's implementation choices will determine how much of the timing gap exists in practice. The proclamation authorizes implementing rules and guidance but does not resolve when reduced-duty imports begin, whether unused quantities carry forward, how long an approval lasts, or how forecasts are reconciled with actual production. Commerce can also define the evidence needed to keep the benefit during construction.
Commerce cannot extend Section 45X beyond the statutory phaseout. Treasury and the IRS control tax guidance, while Congress set the percentage schedule. The two programs therefore need coordinated diligence even if their rules are never formally combined.
The most useful Commerce notice would give applicants enough timing information to model the allowance against construction spending and the 45X runway. Until then, an approved annual quantity is not a complete valuation input.
The records that would change the model
Three records would materially change this analysis.
First, Commerce could publish procedures that delay the reduced-duty allowance until production begins. That would align the program clocks more closely, though the 45X phaseout would still reduce later tax years.
Second, the project companies could disclose a commercial-production date, a final power agreement, financing, and the venture's tax and import roles. That would replace a wide range of possible timing outcomes with an auditable base case.
Third, Treasury and the IRS could finalize the reserved aluminum rule or replace the interim PFE guidance. Either action would narrow the uncertainty around qualifying forms, production methods, input sourcing, and substantiation.
Until those records appear, the prudent reading is limited but consequential. The Section 232 authority now offers a project-specific import benefit, and the broader Section 232 record will show how Commerce implements it. Section 45X offers a separate production benefit with a shrinking statutory runway and separate eligibility tests. A new smelter may use both, but no current source supports valuing them as one stable subsidy from construction through operation.
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