What Building Owners and Developers Need to Know Before 2027
🌻 This article is for commercial buildings, nonprofit facilities, and multifamily developments. Residential homeowner solar tax credit incentives expired at the end of 2025.
Federal solar incentives for commercial, nonprofit, and multifamily solar projects have key deadlines upcoming. If solar is part of your capital plan, development pipeline, or long-term operating strategy, the next 12–18 months are critical.
The biggest shift: commercial solar systems must be installed by December 31, 2027 to receive the 30% Federal Solar Tax Credit.
Key Dates for Commercial Solar Tax Credits
If your business, non-profit, or religious organization wants to add solar to a commercial property you have you have until December 31, 2027 to complete your solar project to take advantage of the 30% Federal Solar Tax Credit.
Note: There is a ‘safe harbor’ deadline for July 4th, 2026 which allows projects to preserve the tax credit for an additional 4 years. If you have not already reached out about your project, we are unable to support in meeting the safe harbor deadline based on our queue at this time. However, we are happy to work with you to determine if your project can meet the December 31, 2027 deadline!
What’s changing under HR 1 (OBBBA)?
As part of HR 1 (the One Big Beautiful Bill Act), Congress shortened the eligibility window for federal clean energy tax credits that apply to commercial, nonprofit, and multifamily solar projects.
In practical terms:
- Projects need to be installed by December 31, 2027.
- Long-lead developments (especially multifamily and institutional projects) are most affected.
This has major implications for projects that:
- are still in design,
- are part of multi-phase developments,
- depend on complex financing or permitting, or
- won’t realistically be operational by the end of 2027.
What about the 20% low-income adder for multifamily projects?
Many multifamily solar projects can qualify for a 20% low-income bonus credit, significantly increasing the overall incentive value.
These adders can materially improve:
- project economics,
- financing structures,
- and long-term operating costs for affordable housing.
However, eligibility, timing, and documentation requirements still apply, making early coordination even more important for developers pursuing these credits.
Click here to learn more about our solar services for Multifamily & Mixed-Use Spaces.
Frequently Asked Questions
Does this apply to residential homeowner solar?
No. Residential solar incentives follow a different timeline and set of rules. This article applies only to commercial, nonprofit, and multifamily projects.
What happens if my project misses the July 4, 2026 safe harbor deadline?
Projects that do not ‘safe harbor’ by July 4th, must be installed and placed in service by December 31, 2027 to qualify for federal credits.
Can new construction projects still qualify for solar tax credits?
Yes. Commercial new construction projects can qualify, but timelines and documentation must be carefully aligned to meet the December 31, 2027 completed install date.
Next Steps
If you’re planning solar for a commercial building, nonprofit facility, or multifamily development, now is the time to pressure-test your schedule.
SEM can help you:
- evaluate whether your project can meet the July 4, 2026 begin-construction deadline,
- understand how the federal incentive changes affect your specific project,
- and structure a development path that aligns with current guidance.
