Federal Court Delivers Wins and Warnings for Renewable Energy Tax Credit Basis

A recent federal court decision provides an important reminder for renewable energy investors and developers: when tax benefits depend on the value of eligible tangible property, defensible cost documentation can be just as important as the valuation methodology itself. 

On July 8, 2026, the U.S. Court of Federal Claims favored a modified cost approach for allocating the purchase price of renewable energy facilities between tangible property eligible for federal incentives and ineligible intangible assets. The Court rejected the taxpayer’s discounted cash flow approach based largely on insufficient evidence supporting the taxpayer’s allocation. 

Although Alta Wind I Owner Lessor C et al. v. United States arose from cash grants available under the American Recovery and Reinvestment Act of 2009 (ARRA), the Court applied the purchase price allocation framework of Internal Revenue Code (IRC) §1060. As a result, the decision has potential implications beyond the ARRA grant program wherever taxpayers must distinguish the value of tangible property from goodwill, contractual rights, and other intangibles. 

Notably, for taxpayers seeking investment credits for renewable energy, the decision confirms the inclusion of legitimate development costs when establishing the basis for calculating the credit. 

The Dispute: What Is the Tangible Property Actually Worth? 

The case concludes a long-running dispute involving nearly $1 billion in cash grants awarded to operators of wind energy facilities. Under ARRA, qualifying renewable energy projects generally could receive cash grants equal to 30% of the basis of eligible tangible personal property. 

The central issue was how much of the facilities’ purchase price should be allocated to that eligible property. 

The taxpayer’s valuation incorporated 98% of the anticipated ARRA grant value into the property basis. The government challenged that approach, arguing that purchase prices exceeded the development and construction costs attributable to the tangible assets. The Federal Circuit ultimately directed the Court of Federal Claims to allocate the purchase price under the seven asset classes of IRC §1060, distinguishing eligible tangible and turnkey value from goodwill and other intangibles. 

That distinction proved decisive. 

Why the Income Approach Fell Short 

The taxpayer advocated a discounted cash flow approach that projected future cash flows and discounted them to present value. But the Court questioned whether anticipated ARRA grants should themselves increase the value of the tangible property generating the grant. 

Critically, the taxpayer did not provide evidence demonstrating that market participants conventionally incorporate anticipated grant proceeds into the value of eligible tangible assets. The Court instead viewed the grant as value dependent on the underlying assets—not necessarily an increase in the tax basis of those assets. 

The taxpayer also failed to separately substantiate a turnkey increment. Those evidentiary shortcomings weakened the argument that anticipated grant value properly belonged in IRC §1060 Class V tangible property. 

The Court Turns to Cost 

The Court instead concluded that fair market value should begin with the facilities’ cost segregation reports. 

Under the modified cost approach, the Court allowed interest during construction, development fees, and developer profit percentages to be included in the valuation. It excluded development rights and turnkey premiums. The taxpayer also failed to establish that various development rights should be capitalized into tangible asset costs under IRC §263A, including because certain claimed rights were insufficiently defined or quantified. 

Importantly, the Court did not conclude that discounted cash flow methodologies are inherently inappropriate for IRC §1060 valuations. Rather, the evidence in this case favored the cost approach. 

Why the Decision Matters 

The broader lesson from Alta Wind is less about choosing one valuation methodology over another and more about being able to substantiate the value being claimed. For renewable energy projects, the distinction between tangible and intangible value can directly affect the amount of property eligible for federal incentives. That makes contemporaneous, asset-level support increasingly important—particularly for projects involving solar, wind, geothermal, and energy storage technologies. Taxpayers should consider whether their documentation clearly supports: 

• Investment tax credit (ITC) qualification and eligible basis 

• Cost segregation and asset-level allocations 

• Appraisal assumptions and valuation methodologies 

• Purchase price allocations under IRC §1060 

• Developer profit and claimed turnkey value 

• The distinction between tangible property and intangible project value 

Ryan’s Take and Action Steps 

For renewable-energy developers, this decision reinforces the value of integrating tax credit qualification, valuation, cost segregation, and contemporaneous documentation. Developer fees, construction-period interest, and other amounts above direct engineering, procurement, and construction costs may appropriately contribute to eligible basis. However, taxpayers should be prepared to establish what those amounts represent, how they were determined, and why they are properly attributable to eligible property. An integrated analysis can both identify legitimate opportunities to optimize ITC basis and build the documentation necessary to defend that basis. 

Companies developing, acquiring, or investing in renewable energy projects should evaluate whether their current valuation and cost documentation would withstand that level of scrutiny.