Energy-efficient tax credits and deductions reduce tax liability in different ways, and understanding the distinction is critical when evaluating potential savings.  

An energy-efficient tax deduction reduces taxable income.  The Section 179D Energy-Efficient Commercial Buildings incentive is a tax deduction, not a credit — a common point of confusion.   

An energy-efficient tax credit directly reduces the amount of tax owed, dollar-for- dollar.   The Investment Tax Credit (ITC) or Clean Electricity Investment Credit (CEIC), and the Alternative Fuel Vehicle Refueling Property Credit are all credits. 

Businesses may benefit from a variety of federal incentives for energy-efficiency, including:   

• The Energy-Efficient Commercial Building Deduction (179D) 

• The Investment Tax Credit (ITC) or Clean Electricity Investment Credit (CEIC)  

• The Alternative Fuel Vehicle Refueling Property Credit   

There are a variety of state-specific incentives available as well, including credits, rebates, and grants.    

Because eligibility, benefit amounts, and documentation requirements vary widely by program and jurisdiction, incentives should be evaluated in the context of the specific project, timeline, and geographic location. 

Energy-efficient tax incentives may benefit a wide range of participants in commercial real estate projects:  

• Commercial building owners and developers may benefit when incorporating energy-efficient systems into new construction or retrofits  

• Tenants may also qualify if they funded the energy-efficient improvements 

• Design professionals like architects and engineers may benefit from the 179D Deduction via allocation on projects involving government-owned or tax-exempt properties 

Determining who is eligible — and how benefits should be allocated — depends on project structure, ownership, and funding, making careful review essential. 

Yes, energy-efficient incentives may be available for existing commercial buildings, depending on the scope of work performed. 

The primary federal incentive applicable to existing buildings is the Section 179D Energy-Efficient Commercial Buildings Deduction. The deduction may apply to qualifying energy-efficient retrofits involving lighting, HVAC, or building envelope systems. 

Eligibility depends on demonstrating a reduction in energy consumption relative to established benchmarks, supported by engineering analysis and proper documentation. 

Energy-efficient incentives may apply when commercial real estate renovations include qualifying efficiency improvements or energy systems.  

• The 179D Deduction may be leveraged by those performing energy-efficient retrofits 

• Additionally, if a renovation involves the addition of a renewable energy system like solar panels, the Investment Tax Credit or Clean Electricity Investment Credit may apply.    

• Similarly, if a renovation involves the addition of EV recharging stations, the Alternative Fuel Vehicle Refueling Property Credit may apply.   

Each incentive has distinct eligibility and documentation requirements, making it important to evaluate renovations holistically rather than in isolation. 

A variety of project types may qualify for energy-saving tax credits or deductions, provided they meet applicable performance, documentation, and timing requirements.    

Eligible projects may include:  

• Newly constructed or retrofitted commercial properties that achieve required energy-efficiency thresholds 

• Newly constructed or retrofitted residential rental properties that are at least four stories above grade 

• Projects that include renewable energy systems such as solar, wind, or geothermal 

• Projects that include the installation of EV charging stations  

Eligibility depends on the specific incentive, the scope of work performed, and how energy savings or investments are substantiated.  Project timing is also a key consideration for eligibility.   

Businesses may qualify for energy efficiency tax credits or deductions when they invest in qualifying improvements or energy systems.  

This may include businesses that:  

• Upgrade or replace building lighting, HVAC, or envelope systems 

• Install renewable energy systems such as solar or small wind 

• Add EV charging stations to their property  

Eligibility is determined by the nature of the improvements, ownership structure, and compliance with program-specific requirements.  Again, timing is critical.   

The Section 179D Energy-Efficient Commercial Buildings Deduction allows eligible projects to claim a deduction of up to $5.81 per square foot based on energy performance.  Deduction values will be adjusted annually for inflation.  

The deduction may apply to new construction or qualifying retrofits of commercial buildings of any size, and to residential rental properties that are at least four stories tall. Because the benefit is calculated per square foot, larger properties often see more significant deductions. 

To qualify, projects must demonstrate a reduction in energy consumption compared to the applicable benchmark standard. This requires evaluation by a licensed engineer or contractor, along with energy modeling software to substantiate performance thresholds. 

The One Big, Beautiful Bill Act (OB3) assigned a sunset date to the 179D Deduction.  

Projects that begin construction after June 30, 2026 are not eligible for the deduction. However, projects that began construction before that date — including projects already placed in service, currently under construction, or scheduled to begin construction by June 30th — may still qualify. 

Because timing is a determining factor for eligibility, timely decision-making is critical. 

For both the ITC/CEIC and the EV Charging Station Credits, the base Credit is 6% of the funds invested.  That rate will quintuple to 30% if the Prevailing Wage and Apprenticeship (PWA) Requirements are met.   

Because credit amounts are tied to both investment costs and labor compliance, accurate cost allocation and wage-related documentation are essential to maximizing benefit. 

The exact documentation required will vary by project, but may include:  

• Site drawings and plans (lighting, mechanical, architectural, structural, electrical) 

• Detailed scopes of work for qualifying improvements  

• Cost records and placed-in-service dates for relevant assets  

• Energy models  

• Employee wage logs that testify to the satisfaction of the Prevailing Wage and Apprenticeship Requirements  

Yes. Architects, engineers, and other design professionals play an important role in helping projects meet energy-efficiency thresholds. 

By incorporating qualifying features into the design of lighting, HVAC, and building envelope systems, designers can directly impact Section 179D deduction eligibility. On projects involving government-owned or tax-exempt entities, designers may also benefit from the deduction themselves through allocation. 

Timing is crucial for multiple energy-saving incentives under the new tax law.  Keep the following key dates in mind:  

Tax strategy firms like Capstan help business owners and their advisors identify, navigate, and successfully claim all relevant incentives.  They assist in compiling documentation and ensuring compliance, so that your energy-efficient tax credit or tax deduction is fully leveraged and thoroughly supported.   

The 179D Tax Deduction (Section 179D, IRC) allows building owners and designers to claim a deduction for energy-efficient improvements to commercial buildings under EPAct 2005.  Improvements may be made to HVAC systems, lighting, and building envelope, with benefits reaching up to $5.94 per square foot for qualifying projects.   

The 179D Deduction benefit is up to $5.94 per square foot for projects meeting Prevailing Wage and Apprenticeship Requirements, with a base rate of approximately $1.19 per square foot, both subject to inflation adjustment under the IRA.  For example, a 100,000 square foot building could generate a $594,000 deduction. 

Energy efficient tax credits are federal incentives that directly reduce the amount of tax you owe on qualifying energy-saving systems, while deductions reduce your taxable income. 

Businesses in the US can access several energy-related tax incentives, including: 

• Section 179D Energy-Efficient Commercial Building Deduction  
• Investment Tax Credit (ITC) / Clean Electricity Investment Credit (CEIC)  
• Section 30C Alternative Fuel Vehicle Refueling Property Credit  

Commercial real estate owners can benefit from energy-focused tax incentives such as the 179D Deduction, offering up to $5.94 per square foot, and the ITC/CEIC for qualifying energy property.  Additional planning opportunities arise by stacking strategies like combining Cost Segregation with 179D across offices, warehouses, and retail properties in various sectors today.