The U.S. Department of the Treasury has issued the final ruling on Section of the Inflation Reduction Act.

Key Chapter Title List

1. What is Section 45X of the Inflation Reduction Act?
2. How did the industry and policymakers respond to the initial guidance?
3. What are the contents of the Treasury's final ruling and its differences from previous guidance?
4. What does the final rule mean for mineral processing companies, and how is it expected to impact industry investment?
5. What does the final ruling mean for mineral mining companies, and how is it expected to impact industry investment?
6. How might the final ruling affect mineral investments by U.S. strategic partners overseas?

Document Introduction

The 2022 Inflation Reduction Act (IRA) introduced a series of tax credits, subsidies, and incentives aimed at promoting the domestic manufacturing of U.S. clean energy technologies and their components. Among these, Section 45X, the Advanced Manufacturing Production Tax Credit (PTC), is a core initiative. It covers the production of downstream technologies such as electric vehicle batteries and solar panels, while also supporting the upstream critical minerals industry by subsidizing high production costs.

The proposed rules for Section 45X released by the Treasury Department in 2023 sparked strong opposition from the industry and Congress because they did not include raw material costs and extraction costs in the tax credit calculation. Mining companies, labor unions, and Democratic senators argued that this rule weakened the incentive effect of the tax credit on the domestic critical minerals supply chain, leaving some mining projects struggling due to a lack of policy support.

On October 24, 2024, the U.S. Treasury Department issued the final ruling for Section 45X. The core revision clarifies the definition of production costs, explicitly including the raw material and extraction costs of critical minerals and electrode active materials in the credit calculation. However, this applies only to eligible components refined to specified purity levels and requires companies to have both extraction and processing operations to qualify for the benefits.

For mineral processing companies, the new rule significantly enhances the practical value of the tax credit, incentivizing the construction of midstream processing capacity in the United States. This is particularly beneficial for investments in areas such as lithium processing and precursor cathode active material (pCAM). However, companies engaged solely in extraction activities remain ineligible for the credit, prompting calls from related industries for further targeted incentive policies.

At the international level, the final rule allows domestic processors to include the material costs of imported ores in their credit calculations but requires the final product processing to be completed within the United States or its territories. This arrangement helps incentivize supply chain cooperation between the U.S. and resource-rich strategic partners, though it also faces challenges posed by resource nationalism and export bans in some countries.

This final ruling provides stronger policy support for the U.S. domestic critical minerals industry, helping to enhance its competitiveness in the global market. However, the United States still needs to continue advancing reforms in capacity building and supply chain security to meet the mineral demands of the energy transition and national security.