Claiming the ITC on Energy Projects? What ITC Actually Covers (And Why It’s Bigger Than You Think)
What Is the Investment Tax Credit (ITC) and Why It Matters
The Investment Tax Credit (ITC) is one of the most powerful financial incentives available for energy projects in the United States. It allows building owners and developers to recover a significant percentage of project costs as a direct reduction in federal tax liability.
For projects involving solar, battery storage, geothermal, and other qualifying systems, the ITC can dramatically improve project economics by lowering upfront costs and accelerating payback.
But here’s what most people miss:
➤ The value of the ITC is not fixed. It depends on how the project is designed, documented, and structured.
Small decisions—like how costs are categorized, how systems are defined, or whether certain requirements are met—can change the credit by tens or even hundreds of thousands of dollars.
That’s why the ITC isn’t just a tax benefit. It’s a strategic lever that can make or break the financial viability of a project.
At a high level, the ITC allows you to claim a percentage of your project cost as a tax credit.
- Base credit: typically 30% of eligible costs
- Potential adders: +10% to +40% depending on project conditions (domestic content, location, low-income programs)
- Applies to:
- Solar PV
- Battery storage
- Geothermal systems
- CHP and other qualifying technologies
Even more important:
➤ The ITC applies to more than just equipment
It can include:
- Engineering and design
- Installation labor
- Interconnection costs
- Permitting and soft costs
How High Can the ITC Actually Go?
You may hear claims that the ITC can reach 70%.
That’s technically true — but it’s not the norm.
While the ITC can theoretically reach 70% in specific low-income solar cases, most commercial projects realistically fall in the 30% to 50% range. The key is ensuring your project captures every eligible adder and doesn’t leave value on the table.
Here’s how the structure works in practice:
- 30% → Standard target (with prevailing wage & apprenticeship)
- 40%–50% → Achievable with proper strategy (domestic content + energy community)
- 60%+ → Rare, requires specific program eligibility
- 70% → Limited to small, approved low-income solar projects
Why This Matters More Than You Think
Most projects don’t fail because they miss the 70%.
They fail because:
➤ They stay at 30% when they should have been at 40–50%
That difference alone can mean:
- Hundreds of thousands in lost value
- Weaker project economics
- Missed financing opportunities
Action Step: Get a Second Set of Eyes on Your Project
If you're working on:
- Solar
- Battery storage
- Geothermal
- CHP or hybrid systems
The smartest move you can make right now is simple:
➤ Have your project reviewed before it’s finalized
Not after.
Bob Fassbender is the founder of Energy-Models.com and Fassbender Energy Advisory. A former Trane software engineer and instructor, Bob has more than 20 years of experience in energy modeling, building performance, utility incentives, and energy strategy. His work spans whole-building energy modeling, calibration, independent technical review, decarbonization planning, utility incentive strategy, renewable energy analysis, and owner advisory services. Bob has supported projects ranging from commercial buildings and utility programs to large-scale data center developments involving power infrastructure, geothermal systems, heat recovery, and long-term energy planning. Through Energy-Models.com, Bob has trained thousands of energy professionals in eQUEST, OpenStudio, EnergyPlus, LEED modeling, and building performance analysis. He continues to advise owners, engineers, architects, and developers on energy-related decisions while exploring emerging technologies such as artificial intelligence, machine learning, and advanced building analytics.