The Section 45X Advanced Manufacturing Production Credit was one of the clean energy provisions many people expected the One Big Beautiful Bill Act to gut. It didn’t. Section 45X came out of OBBBA largely intact, with its core structure and general phase-out schedule preserved. But a handful of changes got layered on around the edges, and depending on what a manufacturer makes and who its supply chain touches, some of those changes matter a great deal.
Section 45X provides domestic manufacturers with a per-unit production credit for eligible components: solar cells and modules, wind components, inverters, battery cells and modules, and applicable critical minerals, as long as those components are made in the United States and sold to an unrelated person. Unlike most other Inflation Reduction Act energy credits, 45X was never built with a prevailing wage and apprenticeship bonus. There is no five-times multiplier tied to labor standards here, since the statute simply sets a flat credit amount per unit produced. OBBBA left that basic structure alone. For most eligible components other than critical minerals, the original phase-out schedule from the Inflation Reduction Act still stands: components sold in 2030 get 75% of the credit, components sold in 2031 get 50%, and components sold in 2032 get 25%, with the credit expiring after that. OBBBA didn’t move up this general timeline.
Wind energy components took the hardest hit from OBBBA’s changes to Section 45X. Instead of the gradual 2030 to 2032 phase-down that applies to most other components, wind components become entirely ineligible for the credit if sold after December 31, 2027. That is a hard cutoff, not a phase-down, and it applies specifically to wind. Solar, battery, and inverter components stay on the original, more gradual schedule.
Critical minerals used to be the one component category with no phase-out or expiration date at all under the original Inflation Reduction Act. OBBBA changes that, introducing a new, staggered phase-out for critical mineral production credits starting in 2031. Separately, OBBBA expanded the definition of qualified critical minerals to include metallurgical coal, the type used in steelmaking, at a credit rate of 2.5% of production costs. That addition comes with its own sunset: the metallurgical coal credit isn’t available for production after 2029.
OBBBA also added foreign entity restrictions to Section 45X that didn’t exist before. For taxable years beginning after July 4, 2025, a component no longer qualifies as an eligible component if it received material assistance from a prohibited foreign entity, meaning too much of its value traces back to a restricted foreign source. Separately, a taxpayer that is itself classified as a specified foreign entity or a foreign-influenced entity cannot claim the credit at all, no matter where the component was actually produced. Manufacturers now need visibility into where their constituent materials and components come from, not just where final assembly happens.
OBBBA also tightened how vertically integrated manufacturers can claim credits for components built into other components before final sale. Under the new rule, a manufacturer can claim credit for a primary component incorporated into a secondary component only if at least 65% of the direct material costs used to produce that secondary component trace back to qualifying primary components, and the secondary component is sold to an unrelated person. This applies to components sold in taxable years beginning after December 31, 2026, which gives integrated manufacturers some runway to restructure sourcing and internal cost allocation before it kicks in.
Section 45X’s relationship with the Section 48C qualifying advanced energy project credit is unchanged: a production facility that already received a Section 48C credit cannot also claim 45X for the same production units, though it can still claim 45X for units that were not used toward 48C. The credit also still has no prevailing wage and apprenticeship bonus, so manufacturers do not face the labor-compliance stakes that come up with other renewable energy tax credits. There is no enhanced rate tied to PWA compliance to lose here, because there never was one.
For manufacturers already producing solar, battery, or inverter components, OBBBA’s changes to 45X are less disruptive than many people initially feared. The core credit and general phase-out timeline did not move. Wind component manufacturers are in a different, more urgent spot, since their credit disappears for sales after 2027 instead of phasing down gradually. Manufacturers and investors evaluating 45X-eligible production, especially those with complex or international supply chains, should build prohibited foreign entity screening into sourcing decisions now, since the material assistance restrictions already apply to tax years beginning after July 4, 2025. Vertically integrated producers have a bit more time, and should start evaluating their internal cost allocation between primary and secondary components before the 2027 tax year, when the new 65% threshold takes effect.
Fallbrook Financial Services works as a facilitator and intermediary connecting taxpayers, developers, and capital sources across the tax credit markets we serve, including renewable energy, LIHTC, film and entertainment, and historic rehabilitation credits. We help manufacturers and capital sources understand how a credit like Section 45X fits into a broader tax credit strategy as the rules keep evolving, and we coordinate the documentation and diligence that a compliant claim requires.
OBBBA didn’t gut Section 45X the way many expected. For most manufacturers, the credit and its phase-out schedule look the same as before. But the exceptions are real: wind manufacturers are working against a 2027 cliff instead of a gradual phase-down, critical mineral producers now have a phase-out where none existed, and every manufacturer with an international supply chain needs to think about foreign entity exposure well before it becomes a problem. The credit survived. The fine print didn’t stay still.
Miller & Chevalier — OBBBA Brings 45X Changes, Though Not Wholesale Repeal: https://www.millerchevalier.com/publication/obbba-brings-45x-changes-though-not-wholesale-repeal
RSM US — Tax Bill Significantly Changes Clean Energy Credits and Incentives: https://rsmus.com/insights/services/business-tax/obbba-tax-clean-energy.html
Congress.gov / Congressional Research Service — The Section 45X Advanced Manufacturing Production Credit: https://www.congress.gov/crs-product/IF12809
Congress.gov / Congressional Research Service — Inflation Reduction Act (IRA) Wage and Apprenticeship Requirements: Effect on Tax Credit Values: https://www.congress.gov/crs-product/R48428
Maner — How the OBBBA Impacts Renewable Energy Credits: https://manercpa.com/renewable-energy-credits-what-you-need-to-know-after-the-obbba/
ICS Tax, LLC — New Guardrails and Phase-Outs for the §45X Advanced Manufacturing Credit: https://ics-tax.com/news/obba-updates-45x-advanced-manufacturing-credit/
Eide Bailly — OBBB Changes to the Advanced Manufacturing Production Credit: https://www.eidebailly.com/insights/articles/2024/2/understanding-section-45x
Grant Thornton — IRS Expands Section 45X Advanced Manufacturing Credit: https://www.grantthornton.com/insights/alerts/tax/2024/flash/irs-expands-section-45x-advanced-manufacturing-credit
Bloomberg Tax — Internal Revenue Code Section 45X, Advanced Manufacturing Production Credit: https://irc.bloombergtax.com/public/uscode/doc/irc/section_45x
U.S. House Office of the Law Revision Counsel — 26 U.S.C. 45X: Advanced Manufacturing Production Credit: https://uscode.house.gov/view.xhtml?req=%28title%3A26+section%3A45X+edition%3Aprelim%29
Disclaimer: This article is provided by Fallbrook Financial Services for general informational purposes only and does not constitute legal, tax, accounting, investment, or financial advice. Fallbrook acts as a facilitator and intermediary in tax credit transactions and is not a broker-dealer, investment adviser, or tax or legal advisor. Federal tax credit programs, phase-out schedules, foreign-entity restrictions, and eligibility rules, including those enacted under the One Big Beautiful Bill Act, are complex, subject to change, and depend on each manufacturer’s specific facts and supply chain circumstances. Consult your own qualified tax, legal, and financial advisors before making any decision related to Section 45X or other tax credit transactions. Fallbrook makes no representation or warranty as to the accuracy, completeness, or current applicability of the information contained herein.