Judge Overturns Trump Guidance on Green Tax Credits

The decision by D.C. federal Judge Colleen Kollar-Kotelly to invalidate Trump-era restrictions on green tax credits represents a significant triumph for proponents of renewable energy. However, this victory emerges just weeks before a crucial deadline to entirely eliminate the credits, as mandated by the Republican-backed “Big Beautiful Bill.” This leaves the extent of the ruling’s impact uncertain.

The One Big Beautiful Bill Act of last year set forth provisions to phase out tax credits for solar and wind energy projects. These projects could only qualify for credits if they commenced construction before July 5, 2026, or came into service before 2028.

The core issue in this case pertains to the IRS’s criteria for defining the commencement of construction. Since 2013, the IRS has acknowledged two methods for starting a project: initiating “physical work of a significant nature” or covering costs amounting to five percent or more of the project’s total expenses. The guidance implemented during the Trump administration included solely the “physical work” approach and disregarded the five percent criteria. Judge Kollar-Kotelly, appointed by President Clinton, ruled that the exclusion of projects meeting the five percent cost threshold was unjustifiable and arbitrary.

Nonetheless, the judge acknowledged that the upcoming July construction deadline might still leave renewable developers with insufficient information to make investment choices in wind and solar projects. She observed that “significant uncertainty will exist no matter how this Court resolves this case and what remedy it awards.”

The outcome of this case bears implications for the future investments in renewable energy projects and the legal interpretation of government guidance concerning tax credits and renewable projects.