How is 179D Calculated?
The 179D tax deduction is calculated based on a commercial building’s square footage and the energy cost savings achieved by improving its envelope, lighting, or HVAC systems. It’s important to note that 179D is not only applicable to building owners. Design firms, such as architects, engineers, and contractors, can also claim this deduction for public buildings such as schools or government offices. 179D Calculation Process To claim the 179D tax deduction, energy-efficient buildings must be certified as installed as part