The Inflation Reduction Act (IRA) of 2022 was signed into law on August 16, 2022. Among the provisions included in this bill is the expansion of the Section 179D tax deduction for building energy efficiency. Thousands of commercial building owners have utilized the 179D tax deduction since its inception in 2005, and this expansion potentially allows for many more to not only utilize the deduction but also claim larger amounts than previously available.