Residential Energy Conservation Subsidy Exclusion (Personal)
Administered by U.S. Internal Revenue Service
If you receive a rebate or subsidy from your utility company for residential solar thermal or photovoltaic systems, that subsidy may be excludable from your taxable income under Section 136 of the U.S. Code, meaning you won't owe federal income tax on the rebate amount. However, if you also claim a federal tax credit (like the Investment Tax Credit), you must reduce the cost basis of your system by the utility subsidy value—you cannot claim the credit on money the utility paid. Since the IRS has not ruled definitively on solar rebates, consult a tax professional to confirm the tax treatment of your specific utility rebate before filing.
When promoting energy conservation measures to customers, be aware that utility-provided rebates for solar-thermal and photovoltaic installations may be non-taxable income to the customer under Section 136, which enhances the rebate's value. However, inform customers that any utility subsidy received will reduce their federal tax credit basis if they claim credits—they cannot double-benefit from both a rebate and a full tax credit on the same expense. Clarify that the definition of qualifying measures includes systems designed to reduce electricity or natural gas consumption across houses, apartments, condominiums, mobile homes, and similar properties.
This federal tax exclusion (IRC Section 136) automatically applies to energy conservation subsidies provided by public utilities—defined as entities selling electricity or natural gas to residential, commercial, or industrial customers, including government entities. The provision covers solar-thermal and photovoltaic rebates, though the IRS has not issued definitive guidance on renewable energy systems specifically. Taxpayers claiming the exclusion must reduce their investment basis for federal tax credit purposes by the subsidy amount. Eligible dwelling units include houses, apartments, condominiums, mobile homes, boats, and similar properties; subsidies for mixed-use buildings must be properly allocated to residential units only.
Program details
- Program ID
- 666
- Last updated
- 3/26/2026
Eligibility
- Sectors
- residential multifamily residential
- Technologies
- solar water heat solar space heat solar photovoltaics yes; specific technologies not identified
Program summary
According to Section 136 of the U.S. Code, energy conservation subsidies provided (directly or indirectly) to customers by public utilities* are non-taxable. This exclusion does not apply to electricity-generating systems registered as "qualifying facilities" under the Public Utility Regulatory Policies Act of 1978 (PURPA). If a taxpayer claims federal tax credits or deductions for the energy conservation property, the investment basis for the purpose of claiming the deduction or tax credit must be reduced by the value of the energy conservation subsidy (i.e., a taxpayer may not claim a tax credit for an expense that the taxpayer ultimately did not pay).
The term "energy conservation measure" includes installations or modifications primarily designed to reduce consumption of electricity or natural gas, or to improve the management of energy demand. Eligible dwelling units include houses, apartments, condominiums, mobile homes, boats and similar properties. If a building or structure contains both dwelling units and other units, any subsidy must be properly allocated.
The definition of "energy conservation measure" implies that utility rebates for residential solar-thermal projects and photovoltaic (PV) systems may be non-taxable. However, the IRS has not ruled definitively on this issue. Taxpayers considering using this provision for a renewable energy system should discuss the details of the project with a tax professional. Other types of utility subsidies that may come in the form of credits or reduced rates might also be non-taxable, according to IRS Publication 525.
* The term "public utility" is defined as an entity "engaged in the sale of electricity or natural gas to residential, commercial, or industrial customers for use by such customers." The term includes federal, state and local government entities.
Contact & resources
- Additional resources
Please verify current program details with the administering agency before making any financial decisions.
