Clean Energy Tax Incentives and the One Big Beautiful Bill (OB3) Act

Summary

On July 4, 2025, President Trump signed the One Big Beautiful Bill (OB3) Act into law. It makes significant changes to energy-related tax benefits pre-dating and modified by the Biden-era Inflation Reduction Act (IRA).

This document summarizes how the OB3 Act treats solar, storage, energy efficiency, and similar projects in commercial and multifamily real estate. A detailed fact sheet on RER’s website (here) provides a deeper analysis of the complex rules regarding tax incentives that may accelerate ROI for energy-related cap ex projects.

Key Takeaways

Energy-related building investments that begin construction in 2025 and after should consider:

Tax credits that start to phase out over the next one to five years (e.g., the Section 48E “tech neutral” credit for solar generation; the Section 179D deduction and 45L credit for energy efficiency projects; and the 30C credit for EV charging stations);

Tax credits that remain available well into the 2030s (e.g., Section 48E for energy storage); and

Permanent options for “full expensing” that may accelerate tax write-offs of energy-related building investments, regardless of Section 48E or other tax credit availability.

See the full fact sheet.

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