Tax Savings for Energy-Efficient Building & Design

The Inflation Reduction Act, signed and passed into law on August 16, 2022, includes $369 billion in climate and energy spending. One of the most exciting parts of the package expands the benefit of Section 179D, which provides a tax deduction for contractors who install or design energy-efficient HVAC, building envelope and lighting assets in qualifying structures.

Finally, we have a change we’ve been waiting for since the deduction’s inception in 2006. Do you want your piece?

While much of the 179D deduction as we know it remains unchanged, the Act contains some new win-win changes. Previously limited to work performed on government-owned buildings, the 179D deduction can now be applied to projects completed for other tax-exempt entities, including nonprofit organizations, religious groups and educational institutions.

The Act also expands the benefit to more contractors by lowering the eligibility threshold. The deduction can now be taken for buildings that show at least 25% energy savings – half of the previous 50% requirement.

The amount of the deduction will be determined by the amount of energy savings achieved. Starting at 50 cents per square foot at the 25% threshold, the deduction increases by 2 cents per square foot for each percentage point above that, up to $1 per square foot.

Under prior law, the deduction maxed out at $1.88 per square foot. Contractors can now exceed this amount and earn a “bonus” deduction (up to $2.50 per square foot at the base 25% threshold) if they pay prevailing wages and meet apprenticeship requirements. This “bonus” deduction increases 10 cents per square foot, up to $5 maximum. It is important to note that each job stands on its own, with regard to this deduction.

Obviously, this becomes a decision for the contractor. Depending on size and building components involved, the contractor will need to come up with the best combination of increased payroll cost on a job and 179D deduction.

The Act also removed the previous lifetime cap of $1.88 per square foot on the deduction, replacing it with a three-year cap. This allows the deduction to be claimed on the same building after three years if qualified upgrades have been made.

As always, the 179D deduction applies to both new construction and renovation of qualifying commercial buildings (retail, office, industrial or warehouse) and apartment buildings (four stories or more). It is available to building owners, as well as contractors and designers. To qualify, the building must have been placed in service after December 31, 2005.

Our Construction and Architecture & Engineering professionals can help you maximize the 179D deduction on completed installations and determine your eligibility for future projects. For more information, please reach out to your Grassi advisor or contact Ronald J. Eagar, Partner, at

Ronald J. Eagar Ronald J. Eagar is the President of Grassi & Co. Certified Public Accountants, PC and is a member of the firm’s Executive Committee. He offers more than three decades of experience in both public and private accounting. Ron’s expertise extends beyond the traditional areas of accounting and taxation and he serves as a comprehensive business advisor to all his clients. He serves as a... Read full bio