Federal Court Restores 5% Solar, Wind Tax Credit Rule Before July 4 Phaseout
Updated
Updated · Heatmap · Jun 3
Federal Court Restores 5% Solar, Wind Tax Credit Rule Before July 4 Phaseout
3 articles · Updated · Heatmap · Jun 3
Summary
A U.S. District Court in Washington overturned IRS guidance that had forced solar and wind projects above 1.5 megawatts to show physical construction had begun, immediately reviving the older 5% investment safe harbor.
The judge said the Trump administration failed to justify scrapping the 5% rule, did not adequately weigh alternatives, and left substantial doubt that concerns about project stockpiling were the real reason.
The ruling matters because the stricter standard had narrowed how many projects could qualify for the 45Y and 48E clean-energy tax credits before those incentives expire on July 4.
Crux Climate said the practical impact may still be limited, with only 26 days left for developers to act and separate restrictions on projects using Chinese imports still in place.
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Clean Energy Tax Credits in Flux: The 5% Safe Harbor, OBBB, and the Future of U.S. Renewables
Overview
On June 6, 2026, the U.S. District Court for the District of Columbia made a major decision that immediately affects clean energy developers. The court vacated IRS Notice 2025-42, calling it 'arbitrary and capricious' because the IRS failed to explain why it removed the 5% safe harbor for wind and large-scale solar projects. This ruling instantly restored the 5% safe harbor, giving developers a narrow but important window to qualify for federal tax credits. The decision highlights the need for clear rules and careful documentation, as the regulatory landscape remains uncertain and could change again soon.