US IRS 26 CFR 1.48e-1 Low Income Communities Bonus Credit Guide
Updated 6 September 2026 · By SolarNevs Research Desk, Dealer surveys + verified sources · 1 source · Method ↗
Key Takeaways
- The Low-Income Communities Bonus Credit Program offers an additional 10% or 20% Investment Tax Credit (ITC) for eligible solar and wind projects.
- Facilities must have a maximum net output of less than 5 megawatts (MW) AC to qualify for the bonus.
- Projects must apply for and receive an annual capacity allocation, which is limited to 1.8 gigawatts (GW) DC per year.
- Non-compliance with benefit sharing or operational requirements can lead to the forfeiture of the bonus credit.
What is the US IRS 26 CFR 1.48e-1 Low-Income Communities Bonus Credit?
The US IRS 26 CFR § 1.48(e)-1 Treasury Regulation establishes the Low-Income Communities Bonus Credit Program, which provides an additional investment tax credit for qualified solar and wind energy facilities. This program, enacted under Internal Revenue Code Section 48(e) by the Inflation Reduction Act, offers an additional 10 percentage point or 20 percentage point bonus to the base Investment Tax Credit (ITC). This can increase the total ITC up to 40% or 50% for eligible projects. The primary goal is to incentivize clean energy development in low-income communities and on tribal lands, ensuring economic benefits reach qualifying households.
Understanding Eligibility and Program Categories
To qualify for the Low-Income Communities Bonus Credit, a facility must have a "maximum net output of less than 5 megawatts (MW) (as measured in alternating current (AC))". The program operates under a national "total annual capacity limitation is 1.8 gigawatts of DC capacity for the calendar year 2023 and 2024 Program." Projects must apply for and receive an allocation of this capacity. The regulation defines four distinct categories for bonus credit eligibility, each with specific criteria and bonus percentages.
Program Categories and Bonus Credits
- Category 1 Facility (Low-Income Community): Offers a 10 percentage point increase in ITC. To qualify, the facility must be located in a population census tract where the "poverty rate for such tract is at least 20 percent".
- Category 2 Facility (Indian Land): Offers a 10 percentage point increase in ITC. These facilities must be located on Tribal or Indian Land as defined under the Energy Policy Act of 1992. The "Geographic criteria does not apply to Category 2 Facilities".
- Category 3 Facility (Qualified Low-Income Residential Building Project): Offers a 20 percentage point increase in ITC. A facility is a "Category 3 Facility if it is part of a qualified low-income residential building project". This typically applies to multi-family master-metered housing.
- Category 4 Facility (Qualified Low-Income Economic Benefit Project): Offers a 20 percentage point increase in ITC. A facility is a "Category 4 Facility if it is part of a qualified low-income economic benefit project". These are often community solar projects with specific benefit-sharing requirements.
Eligibility and Compliance Table
Requirement Detail | Specification | Category/Condition |
|---|---|---|
Maximum Facility Net Output | Less than 5 megawatts (MW) AC | All Categories |
**Annual Program Capacity Limitation | 1.8 gigawatts (GW) DC | National Cap for 2023 and 2024 |
Category 1 Bonus Credit | 10 percentage point increase | Located in census tract with poverty rate >= 20% |
Category 2 Bonus Credit | 10 percentage point increase | Located on Tribal / Indian Land |
Category 3 Bonus Credit | 20 percentage point increase | Qualified Low-Income Residential Building Project |
Category 4 Bonus Credit | 20 percentage point increase | Qualified Low-Income Economic Benefit Project |
Category 4 Low-Income Benefit Share | At least 50 percent of financial benefits | Provided to qualifying households |
Minimum Bill Credit Discount Rate | At least 20 percent | Maintained for all participating low-income households in Category 4 |
Energy Storage Charging Requirement | Charged no less than an annual average of 50 percent by solar | Paired Energy Storage Technology |
Storage Safe Harbor Ratio** | Storage power rating (kW) < 2x solar facility capacity (kW DC) | Paired Energy Storage Technology |
Program Details and Compliance
The application process for the annual capacity allocation is managed through an online portal by the Department of Energy (DOE) and IRS. Verifying census tract eligibility for Category 1 projects can be done using tools like the New Markets Tax Credit (NMTC) mapping tool and ACS low-income data.
Benefit Sharing for Category 4 Projects
For Category 4 facilities, strict benefit-sharing rules apply. The regulation mandates that "at least 50 percent of the financial benefits of the electricity produced by such facility are provided to households with income of less than" a specified threshold. Furthermore, a "bill credit discount rate of at least 20 percent is maintained" for all participating low-income households. This "discount rate of 20 percent is maintained" for the duration of the 5-year recapture period. Projects may need to execute subscriber utility data exchange agreements to automate bill credit distribution and ensure auditing of the 20% discount. For more information on community solar models, see our guide on /pk/guides/money/community-solar-explained-us.
Paired Energy Storage Requirements
The program also includes "energy storage technology (as described in section 48(a)(3)(A)(ix)) installed in connection with such qualifying energy" facilities. To qualify, the "energy storage technology is charged no less than an annual average of 50 percent by the other eligible property". There is also a "safe harbor" rule for sizing: the "energy storage technology (in kW) is less than 2 times the capacity rating of the connected wind facility (in kW AC) or solar facility (in kW direct current (DC))".
For a broader understanding of commercial solar tax credits, refer to our guide on /pk/guides/money/commercial-solar-tax-credit-48e-guide. You can also compare different clean energy tax credits in our guide on /pk/guides/money/clean-energy-tax-credits-section-25d-vs-section-48-guide.
Compliance and Recapture Risks
Failure to adhere to the program's requirements can result in significant penalties, including the "Capacity Allocation Revocation" and "Benefit Sharing Non-Compliance".
- Capacity Allocation Revocation: This occurs if a project fails to place the facility in service within the required statutory window after receiving an allocation, leading to the forfeiture of the bonus credit.
- Benefit Sharing Non-Compliance: This risk arises if a project fails to deliver "at least 50 percent of the financial benefits" or maintain the "20 percent bill discount rate" during the 5-year recapture period. The regulation states that if a facility "described under section 48(e)(2)(C) ceases to provide at least 50 percent of the financial benefits of the electricity produced", it can trigger federal tax credit recapture.
- Exceeding Capacity Limits: "Exceeding the statutory 5 MW AC maximum net output capacity limit" renders the entire facility ineligible for Section 48(e) bonus credits.
- Battery Storage Non-Compliance: "Discharging battery storage without meeting the annual 50% solar charging requirement or 2x safe harbor sizing rule" can also lead to non-compliance.
Projects must ensure that "commercial battery energy storage systems (BESS) comply with NFPA 855 fire protection and containment standards". Additionally, "utility-accessible AC disconnects and revenue-grade interval metering on all multi-tenant community solar arrays" should be installed. For maintenance on distributed plants, "isolate inverter subsystems and verify de-energization prior to performing maintenance on 5 MW AC distributed plants".
When to consult a tax professional
The Low-Income Communities Bonus Credit Program involves complex federal tax regulations and compliance requirements. While this guide provides an overview, specific project eligibility, application strategies, and ongoing compliance can be highly nuanced. It is crucial to consult with a qualified tax professional or legal expert specializing in renewable energy tax credits. They can provide tailored advice, help navigate the application process, verify eligibility, and ensure ongoing compliance to avoid potential recapture of credits. Relying solely on general guidance may lead to errors or missed opportunities.
Frequently asked questions
What is the maximum facility size for the Low-Income Communities Bonus Credit?
To qualify for the bonus credit under 26 CFR § 1.48(e)-1, a facility must have a maximum net output of less than 5 megawatts (MW) as measured in alternating current (AC).
How much additional tax credit can a project receive under this program?
Eligible projects can receive an additional 10 percentage point or 20 percentage point increase in their Investment Tax Credit (ITC), depending on the specific category of the project.
What are the requirements for energy storage paired with a qualifying facility?
Energy storage technology installed with a qualifying facility must be charged no less than an annual average of 50 percent by the connected solar facility. Additionally, the storage power rating in kW must be less than 2 times the capacity rating of the connected solar facility in kW DC.
What is the annual capacity limitation for the Low-Income Communities Bonus Credit Program?
The program has a national annual capacity limitation of 1.8 gigawatts (GW) of DC capacity for the calendar years 2023 and 2024. Applications are submitted through the Department of Energy and IRS online portal.
What are the financial benefit requirements for Category 4 projects?
For Category 4 facilities, at least 50 percent of the financial benefits of the electricity produced must be provided to qualifying low-income households. A minimum bill credit discount rate of 20 percent must be maintained for all participating low-income households.
References
- 26 CFR § 1.48(e)-1 - Low-income communities bonus credit program — accessed 23 August 2026
Related guides
More from schemes, subsidies & financing.