Home Energy Efficiency Credits

Federal home-energy tax credits changed substantially after the Inflation Reduction Act and then changed again in 2025. As of 2026, the key point is that the two main homeowner credits discussed here — the Energy Efficient Home Improvement Credit (26 U.S.C. § 25C) and the Residential Clean Energy Credit (26 U.S.C. § 25D) — are generally no longer available for new 2026 expenditures or newly placed-in-service 2026 property. Under current IRS guidance reflecting 2025 legislation, § 25C generally ended for qualifying property placed in service after December 31, 2025, and § 25D generally ended for expenditures made after December 31, 2025. The credits still matter in 2026 for taxpayers filing 2025 returns, and § 25D can still matter in 2026 if you are carrying forward an unused credit from an earlier year. But this is no longer a page about open-ended 2026 installation incentives.

Current Law (2026)

The federal rules now distinguish sharply between 2025 projects still being claimed on 2025 returns and new 2026 expenditures, which generally do not qualify.

Legal Authority

• 26 U.S.C. § 25C — Energy efficient home improvement credit
• 26 U.S.C. § 25D — Residential clean energy credit
• IRA Section 13301, 13302 — Amendments (see Inflation Reduction Act for the full legislative context)

How It Works

The central fact for 2026 planning: both credits were terminated for new expenditures after December 31, 2025 by P.L. 119-21 (the One Big Beautiful Bill Act). The question is no longer how to optimize staged projects through 2032 — it is whether your property was placed in service, or your qualifying expenditure was made, by that cutoff. If yes, you may still claim the credit on your 2025 return. If no, there is no federal homeowner credit available for the improvement under current law.

For § 25C (the Energy Efficient Home Improvement Credit, while it was active through 2025): the credit worked as two annual buckets — up to $1,200 for insulation, windows, doors, and electrical panel upgrades, plus a separate up-to-$2,000 bucket for heat pumps, heat-pump water heaters, and biomass stoves. Neither was income-limited (no phase-out at any income level). Neither carried forward if you couldn't use the full amount against your tax liability in the year of installation. The credit applied only to existing U.S. homes used as the taxpayer's principal residence — new construction didn't qualify. For qualifying § 25C property placed in service in 2025, taxpayers were also required to include the product's qualified manufacturer identification number (QMID) on Form 5695; missing QMIDs are one of the most common reasons 2025 § 25C claims are processed incorrectly.

For § 25D (the Residential Clean Energy Credit): the credit offered 30% of qualifying solar, battery storage (3+ kWh), wind, and geothermal heat pump costs with no dollar cap. Unlike § 25C, § 25D does carry forward — if the credit exceeded your 2025 tax liability, the unused amount can roll into 2026 and later years until exhausted. This carryforward mechanism means § 25D can still generate meaningful tax savings in 2026 even though no new qualifying expenditures are allowed after December 31, 2025. A $25,000 solar installation placed in service in October 2025 produces a $7,500 credit; if your 2025 tax liability is only $5,000, the remaining $2,500 carries into your 2026 return. Both credits were nonrefundable — they reduce tax owed but cannot produce a refund — making tax-liability modeling important before claiming them.

How It Affects You

Federal energy credits complement state-level utility rate regulation programs, where many utilities offer additional rebates for efficiency upgrades. Homeowners who also purchased electric vehicles should check EV Tax Credits for current eligibility.

State Variations

Implementing Regulations

• Implementation is currently driven more by statute and IRS guidance than by a single dedicated regulation set: For individual taxpayers, the most important operational authorities are the current statute, Form 5695 instructions, IRS FAQ / fact-sheet guidance, and qualified-manufacturer reporting rules for § 25C.
• IRS Notice 2023-59 — Early post-IRA guidance on § 25C, including the home-energy-audit credit and definitions used in administering the revised credit
• Revenue Procedure 2024-31 — Qualified manufacturer registration, written agreement, and identification-number rules relevant to § 25C

Pending Legislation (119th Congress)

As of April 8, 2026, the key legislative development is no longer a hypothetical repeal debate: federal law has already cut off new § 25C and § 25D eligibility after the end of 2025. Further congressional action could still modify transition rules or revive similar incentives in the future, but this page should be read based on the current post-P.L. 119-21 framework unless Congress changes it again.

Recent Developments

• July 4, 2025: P.L. 119-21 (the One Big Beautiful Bill Act of 2025) cut off new homeowner eligibility for these credits after the end of 2025. IRS guidance now reflects that § 25D is not allowed for expenditures made after 2025-12-31, and § 25C is not allowed for expenditures or property placed in service after 2025-12-31.
• 2025 Form 5695 instructions: The IRS updated Form 5695 instructions to make the post-2025 termination explicit and to explain that unused § 25D credit can still carry forward to 2026, while § 25C generally does not carry forward.
• 2025 IRS FAQ and fact-sheet guidance: IRS energy-credit FAQs and Fact Sheet 2025-05 explain the transition rules, including the placed-in-service timing issues that matter for late-2025 projects.
• 2025 § 25C manufacturer reporting: For specified § 25C property placed in service in 2025, taxpayers generally must include the product's qualified manufacturer identification number (QMID) on the return.
• As of April 8, 2026: The main live issues for taxpayers are documentation, timing, and carryforward treatment, not whether these credits remain open for new 2026 projects.