Energy tax credits

The energy tax credits for real estate changed more in 2025 than in any year since they were created, and the changes were overwhelmingly subtractions. The One Big Beautiful Bill Act, signed July 4, 2025, terminated several major residential and efficiency credits years ahead of their scheduled expirations and put the surviving commercial credits on accelerated countdowns. Any advice written before mid-2025 is now dangerously out of date on this topic, so the useful thing this page can do is state clearly what is gone, what remains, and the deadlines that decide whether you can still use anything.

What was eliminated

Start with the losses, because they are large. The Section 25D Residential Clean Energy Credit, the 30% credit homeowners used for solar panels, batteries, geothermal, and small wind on their own homes, was terminated for expenditures made after December 31, 2025. It had been scheduled under prior law to run through the early 2030s; it ended roughly seven years early. The Section 25C Energy Efficient Home Improvement Credit, for insulation, windows, efficient HVAC, and similar upgrades, ended on the same date.

For a real estate investor, note that these were largely owner-occupant credits anyway, but their disappearance matters if you were counting on them for a personal residence or a property you occupy. The broader signal is the direction of travel: the residential clean-energy incentive structure built up over the prior decade was dismantled quickly, and betting on further residential energy credits is not prudent right now.

The 2025 law terminated the 30% residential clean energy credit and the home efficiency credit for expenditures after December 31, 2025, years ahead of their prior schedule.

What still exists, and its deadline

The credit still relevant to real estate investors is the commercial clean electricity investment credit under Section 48E, which applies to income-producing energy property like a solar installation on a rental or commercial building. It survives, but on an accelerated sunset that makes timing everything.

Under the current rules, solar and wind facilities must generally either begin construction by July 4, 2026 or be placed in service by December 31, 2027 to qualify. Miss both and the credit is gone for that project. This creates a genuine race-against-the-clock for investors contemplating solar on commercial or rental property: the physical-work-of-a-significant-nature test for “begin construction” has to be met and documented before the deadline to preserve eligibility under a transition rule. There are also new foreign-entity-of-concern sourcing restrictions that can disqualify projects using certain foreign-made components, adding a supply-chain compliance layer that did not exist before.

The commercial Section 48E investment credit for income-producing solar survives but requires beginning construction by July 4, 2026 or placement in service by December 31, 2027, with new foreign-sourcing restrictions.

The commercial building deduction is also closing

One more item real estate investors used, the Section 179D energy-efficient commercial buildings deduction, is on its way out. It allowed owners of commercial and qualifying multifamily buildings a deduction for energy-efficiency improvements that cut energy use, worth up to several dollars per square foot with prevailing-wage and apprenticeship compliance. Under the 2025 law, 179D is no longer available for property whose construction begins after June 30, 2026.

So the window on the commercial building deduction is closing at nearly the same time as the solar credit’s construction deadline. For an investor with an energy-efficiency retrofit or a solar project in mind, mid-2026 is effectively a cliff: projects that have genuinely begun construction before the relevant deadlines may still qualify, while those that start after do not. This is a moment where a few months of timing can be worth a large amount of tax benefit, which is exactly the kind of deadline worth confirming precisely before relying on it.

The Section 179D commercial building efficiency deduction ends for construction beginning after June 30, 2026, so the commercial energy incentives cluster around a mid-2026 cliff.

The bottom line

• The 2025 law eliminated the 30% residential clean energy credit and home efficiency credit after December 31, 2025.
• These ended years ahead of their prior schedule, dismantling the residential energy-credit structure quickly.
• The commercial Section 48E investment credit for income-producing solar survives but on an accelerated sunset.
• Commercial solar generally must begin construction by July 4, 2026 or be placed in service by December 31, 2027.
• The Section 179D commercial building efficiency deduction ends for construction beginning after June 30, 2026.

For solar specifically and what changed, read solar credits. For a credit that survived intact, see historic tax credits. For the full picture, start at the advanced real estate tax strategies hub.

Last verified August 2026.