Section 179D Commercial Buildings Energy Efficiency Tax Credits

Federal tax law 179D was reinstated in late 2019 and provides significant tax deductions for building owners—and, in certain circumstances, building designers, for new or renovated commercial buildings that meet certain energy saving standards.

This deduction is for qualified commercial buildings with energy efficient lighting, heating-ventilation-air conditioning (HVAC), hot water, and building envelope systems that have been placed in service between January 1, 2018 and December 31, 2020.

NEW: The Moving Forward Act, passed in the U.S. House of Representatives and currently being reviewed by the U.S. Senate, would renew the 179D energy efficient commercial buildings tax deduction through 2025.

What systems currently qualify for this deduction?

Three categories are included in the energy savings standards:

  • Building envelope (roof, windows, insulation, ceilings, etc.)
  • Heating, ventilation & air conditioning (HVAC) and hot water systems
  • Interior lighting fixtures

Who currently qualifies?

  • Commercial building owners
  • Designers of Federal, State or Local government-owned facilities: architects, engineers, contractors and others

Each one of these elements has the potential of a tax deduction of up to $0.60 per square foot for a possible total of $1.80 per square foot. The actual deduction received will depend on energy savings of the components in the final design. (Note: contact us to learn more about eligibility standards.)

The Commercial Building Tax Deduction— Section 179D refers to the Department of Energy (DOE) and Internal Revenue Services’ (IRS) collaborative effort to provide significant tax deductions for building owners and, for government buildings, the building designers—for new or renovated commercial buildings. Building owners may qualify for this deduction if energy efficiency upgrades were put in service after January 1, 2018.

Download our digital brochure: 179D Energy Efficiency Tax Credits

Section 179D Energy Efficiency Tax Credits Reinstated

Here are a few examples of potential deductions:

Building Size
(sq ft)
(up to $0.60/sf)
(up to $0.60/sf)
(up to $0.60/sf)
Maximum potential deductions
20,000 $12,000 $12,000 $12,000 $36,000
50,000 $30,000 $30,000 $30,000 $90,000
80,000 $48,000 $48,000 $48,000 $144,000
100,000 $60,000 $60,000 $60,000 $180,000
200,000 $120,000 $120,000 $120,000 $360,000
500,000 $300,000 $300,000 $300,000 $900,000


Learn more about Criterium Engineers’ additional Energy & Sustainability Services including LEED design/certification, Energy Star certifications, energy audits and more.