US IRS 26 CFR 1.45X-1 Clean Energy Manufacturing Rules Guide

Updated 6 September 2026 · By SolarNevs Research Desk, Dealer surveys + verified sources · 1 source · Method ↗

Key Takeaways

  • The Section 45X credit requires eligible components to be produced within the United States or its possessions.
  • Sales must generally be to an unrelated person, but a Related Person Election is available for sales to affiliates.
  • Production and sales must occur in the active conduct of a trade or business of the taxpayer.
  • Inadequate substantiation of domestic manufacturing steps can lead to disqualification of the credit.

Understanding the Section 45X Advanced Manufacturing Production Credit

The US IRS 26 CFR § 1.45X-1 is an official federal tax regulation that establishes the general rules, definitions, and compliance requirements for the Section 45X advanced manufacturing production credit. This regulation governs the domestic production requirement in the United States, clarifies which taxpayer produces an eligible component, and outlines rules for sales to unrelated persons. It also details the related person election under section 45X(a)(3)(B), the necessity of production in a trade or business, and includes anti-abuse statutory standards.

Core Requirements for the Advanced Manufacturing Production Credit

To qualify for the Section 45X credit, manufacturers must adhere to specific criteria outlined in 26 CFR § 1.45X-1. These requirements ensure that the credit supports domestic clean energy manufacturing and prevents misuse.

Domestic Production Requirement

Eligible components must be "produced within the United States, as defined in section 638(1) of the Code, or a United St" (United States or a US possession). This geographic mandate is fundamental, meaning that components manufactured outside these areas are not eligible. The regulation specifies that "Sales are taken into account for purposes" of being "Produced in the United States."

Production in a Trade or Business

The regulation mandates that "An eligible component produced and sold by the taxpayer in the active conduct of a trade or business" qualifies for the credit. This means the manufacturing and sales activities cannot be passive investments but must be part of an ongoing commercial operation.

Qualified Sales Requirement

Generally, eligible components must be sold to an unrelated person during the taxable year. The regulation refers to "1.45X-2 for rules regarding sales to unrelated persons, sales to related persons, and the related person electio" (election). An "Unrelated person" is defined "in section 45X(a)(3)" of the Internal Revenue Code.

Related Person Election

For manufacturers selling to corporate affiliates, the "Related Person Election" allows "sales to related persons" to be treated as qualified sales. This election has specific requirements regarding "the time, place, and manner of making the Related Person Election." For further details on credit amounts, refer to our guide on /pk/guides/money/us-irs-26-cfr-1-45x-3-solar-manufacturing-credit-amounts-guide.

Anti-Abuse Provisions

The IRS includes "Anti-abuse rule (1) In general. The rules of section 45X and the sect" (section) are designed to prevent transactions "lacking economic substance or structured primarily to generate tax credits" from qualifying. These provisions ensure the credit is used as intended.

Interaction with Other Credits

The regulation addresses "Interaction with Other Credits," specifically prohibiting double-claiming on property produced at facilities for which the Section 48C qualifying advanced energy project credit was allocated. This prevents taxpayers from receiving multiple federal benefits for the same production activities. For information on direct pay options, see our guide on /pk/guides/money/commercial-solar-tax-credit-48e-guide.

Compliance Requirements and Actions

Effective compliance with 26 CFR § 1.45X-1 involves careful record-keeping and adherence to the statutory framework.

Symptom detail

Likely cause

Fix

Extraterritorial Production Disqualification

Claiming credit for components manufactured outside the United States or its possessions.

Ensure all eligible components are produced within the United States (including 50 States, DC, and Section 638 possessions).

Non-Sale Disposition

Attempting to claim credit on components consumed in taxpayer's own business without a valid statutory election.

Ensure eligible components are sold to an unrelated person, or properly execute the Related Person Election for sales to affiliates.

Failing to properly execute the Related Person Election

Incorrect or incomplete filing of the election under § 1.45X-2 when selling eligible components to corporate affiliates.

Follow the specific rules regarding the time, place, and manner of making the Related Person Election.

Claiming Section 45X credit on Section 48C facilities

Double-claiming credits on components produced at facilities also claiming the Section 48C qualifying advanced energy project credit.

Do not claim Section 45X credit on property produced at facilities for which Section 48C was allocated.

Inadequate substantiation of domestic manufacturing

Insufficient documentation to prove domestic manufacturing steps versus mere assembly or packaging of foreign components.

Maintain detailed bills of materials (BOM), production lot tracking, and facility geographic documentation.

Key Provisions of 26 CFR § 1.45X-1

This regulation provides the foundational statutory rules for the Section 45X credit, requiring production within the United States and active trade or business conduct. It governs sales to unrelated persons and the Related Person Election mechanism, while also setting anti-abuse boundaries and coordinating with Section 48C and other Code sections.

The regulation outlines specific parameters:

  • Statutory Authority: The primary authority is 26 CFR § 1.45X-1, derived from Internal Revenue Code Section 45X.
  • Geographic Scope: Components must be produced within the United States, which includes the 50 States, District of Columbia, and Section 638 possessions.
  • Qualified Sales Requirement: Eligible components must be produced by the taxpayer and sold to an unrelated person during the taxable year.
  • Trade or Business Requirement: Both production and sales must occur in the active conduct of a trade or business of the taxpayer.
  • Related Person Election: This provision allows sales to related persons to be treated as qualified sales, provided that statutory election requirements are satisfied.
  • Anti-Abuse Provisions: Transactions lacking economic substance or structured primarily to generate tax credits will be disregarded.
  • Interaction with Other Credits: The regulation prohibits double-claiming on property produced at facilities for which Section 48C was allocated.

For more on transferring tax credits, consult our guide on /pk/guides/money/clean-energy-tax-credits-section-25d-vs-section-48-guide.

Compliance and Audit Readiness

Maintaining strict compliance with federal tax regulations is crucial. For the Section 45X credit, this involves more than just understanding the rules; it requires robust internal controls and documentation.

  • Documentation: Maintain detailed bills of materials (BOM), production lot tracking, and facility geographic documentation. This helps substantiate domestic manufacturing claims.
  • Accounting Controls: Establish accounting controls that clearly separate eligible component production costs from ineligible operations.
  • Reporting: Ensure the tax department completes timely annual reporting on IRS Form 7207 (Advanced Manufacturing Production Credit).
  • Quality Control: Implement quality control screening to ensure all manufactured components meet UL/IEC certification standards prior to commercial sale, as commonly reported by installers.
  • Chain-of-Custody: Retain complete chain-of-custody and transfer documentation for all sales to unrelated buyers.

When to Consult a Tax Professional

While this guide provides an overview of 26 CFR § 1.45X-1, the complexities of tax law often require expert guidance. You should consult a qualified tax professional or legal counsel when:

  • Your manufacturing operations involve intricate supply chains or contract manufacturing arrangements.
  • You are considering making a Related Person Election and need to ensure all statutory requirements are met.
  • There are questions about the interaction of Section 45X with other tax credits or incentives.
  • You need assistance with substantiating domestic manufacturing steps or preparing for an IRS audit.
  • Your business structure or sales arrangements are complex, potentially triggering anti-abuse provisions.

Navigating federal tax regulations can be challenging, and professional advice can help ensure full compliance and maximize eligible credits.

Frequently asked questions

What is 26 CFR § 1.45X-1?

It is an official federal tax regulation under 26 CFR § 1.45X-1 setting forth general rules, definitions, and compliance requirements for the Section 45X advanced manufacturing production credit.

Where must eligible components be produced to qualify for the credit?

Components must be produced within the United States, as defined in section 638(1) of the Code, or a United States possession.

Can I claim the credit if I sell components to a related company?

Yes, the Related Person Election allows sales to related persons to be treated as qualified sales if statutory election requirements are satisfied.

What is the purpose of the anti-abuse provisions?

The anti-abuse provisions ensure that transactions lacking economic substance or structured primarily to generate tax credits will be disregarded.

What documentation is required for compliance?

Taxpayers should maintain detailed bills of materials (BOM), production lot tracking, and facility geographic documentation, and establish accounting controls.

References

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