The federal insulation tax rebate most homeowners know as the Energy Efficient Home Improvement Credit under Section 25C ended on December 31, 2025. If you installed qualifying insulation or air-sealing materials at any point during 2025, you can still claim 30 percent of the material cost, up to a $1,200 annual cap, when you file your 2025 federal return.1Internal Revenue Service. Energy Efficient Home Improvement Credit Insulation installed in 2026 or later does not qualify for the federal credit, though separate state-administered rebate programs funded by the Inflation Reduction Act may still discount the work.
What Ended and What’s Still Claimable
The Inflation Reduction Act of 2022 rebuilt the credit around a 30 percent rate and an annual reset that was supposed to run through 2032.2Internal Revenue Service. Home Energy Tax Credits The One Big Beautiful Bill, signed on July 4, 2025, cut that timeline short. Under Public Law 119-21, Section 25C no longer applies to any property placed in service after December 31, 2025.3Internal Revenue Service. FAQs for Modification of Sections 25C, 25D, 25E, 30C, 30D, 45L, 45W, and 179D Under Public Law 119-21
What matters is the install date, not the purchase date. Insulation you bought in 2025 but had installed in early 2026 does not qualify. Insulation physically in place by December 31, 2025 does, and gets claimed on your 2025 return, typically due April 2026.
Insulation and Air-Sealing Materials That Qualify
Section 25C covers insulation materials and air-sealing systems designed to reduce heat loss or gain in a home.4Office of the Law Revision Counsel. 26 USC 25C – Energy Efficient Home Improvement Credit That includes fiberglass batts, blown-in cellulose, rigid foam boards, and spray foam. On the air-sealing side, weatherstripping, caulk designed for air sealing, spray foam in a can, and house wrap all count.5ENERGY STAR. Insulation Tax Credit
Products must meet the prescriptive criteria of the International Energy Conservation Code (IECC) in effect at the start of the calendar year two years before installation.4Office of the Law Revision Counsel. 26 USC 25C – Energy Efficient Home Improvement Credit For a 2025 installation, that is the 2021 IECC. All materials must be new, and the manufacturer must certify the product can reasonably be expected to stay in use for at least five years. You confirm this through a Manufacturer’s Certification Statement, usually posted on the manufacturer’s website or included with the packaging. Unlike windows, doors, and heat pumps, insulation is exempt from the qualified manufacturer registration and product identification number rules.1Internal Revenue Service. Energy Efficient Home Improvement Credit
Who Can Claim It
The credit is available to individual taxpayers who improved an existing home they own and use as their primary residence. You have to live in the home for the majority of the tax year.1Internal Revenue Service. Energy Efficient Home Improvement Credit Vacation homes, rental properties, and new construction are excluded. A landlord who does not live in the property cannot claim the credit.
The home must be located in the United States.4Office of the Law Revision Counsel. 26 USC 25C – Energy Efficient Home Improvement Credit If part of your home is used for business, the credit is reduced by the share of expenses tied to business use, but if business use is 20 percent or less, you can still claim the full amount.1Internal Revenue Service. Energy Efficient Home Improvement Credit
Renters and condo owners are not explicitly excluded by the statute, as long as they paid for the improvement, live in the home as their primary residence, and the improvement meets all other requirements. The rule is about who lives there, not who holds the deed.
How Much You Can Get
The credit equals 30 percent of the cost of qualifying insulation and air-sealing materials.4Office of the Law Revision Counsel. 26 USC 25C – Energy Efficient Home Improvement Credit Watch the labor rule: for building envelope components like insulation, only material costs count. Installation fees do not.1Internal Revenue Service. Energy Efficient Home Improvement Credit Spend $4,000 on materials and $2,000 on labor, and your credit calculation runs on the $4,000, producing $1,200.
Insulation and air sealing sit inside the overall $1,200 annual cap for energy-efficient home improvements. No sub-limit applies within that bucket to insulation itself, so the full $1,200 can come from insulation alone.1Internal Revenue Service. Energy Efficient Home Improvement Credit Other improvements in the same $1,200 bucket have their own sub-caps: exterior doors at $250 per door ($500 total), windows and skylights at $600, and a home energy audit at $150. A qualifying audit needs a written report from an auditor certified by a Department of Energy-recognized program (starting in 2024), and it identifies which improvements would save the most.
The credit is non-refundable. It can reduce your federal income tax to zero, but it will not generate a refund on its own, and any unused portion does not carry forward.1Internal Revenue Service. Energy Efficient Home Improvement Credit If you owe $800 in tax and qualify for $1,200 in credit, the remaining $400 disappears.
Filing for a 2025 Installation
Gather two things before you file. The Manufacturer’s Certification Statement for each qualifying product, and itemized purchase receipts that separate material costs from labor.6ENERGY STAR. Tax Credit Definitions Calculate the credit on IRS Form 5695 (Residential Energy Credits).7Internal Revenue Service. About Form 5695, Residential Energy Credits The result carries to Schedule 3 (Form 1040), line 5a.8Internal Revenue Service. Residential Energy Credits
Do not attach the certification statement or receipts to your return. Keep them for at least three years from the filing date in case the IRS asks to verify the claim.9Internal Revenue Service. How Long Should I Keep Records
Rebates Still Available After 2025
The federal tax credit is gone for 2026 installations, but two federal rebate programs funded by the Inflation Reduction Act keep running through state energy offices. These are point-of-sale discounts or post-purchase reimbursements, not tax credits, so they work whether or not you owe federal tax.
The Home Efficiency Rebates program (often called HOMES) offers up to $8,000 for whole-home projects that significantly reduce energy use, and insulation with air sealing is on the eligible upgrade list.10Department of Energy. Home Upgrades The High-Efficiency Electric Home Rebate Act (HEEHRA) targets electrification upgrades for lower-income households, with rebates covering up to 100 percent of costs for households earning below 80 percent of area median income, and 50 percent for those between 80 and 150 percent.
Rollout has been uneven. As of early 2026, roughly a dozen states and the District of Columbia have launched programs, with funding running until it is exhausted or September 30, 2031, whichever comes first. Some launched states are already oversubscribed and placing new applicants on waitlists. Your state energy office is the definitive source for what is available where you live, and the Department of Energy maintains a portal for checking state status. Eligibility rules, income thresholds, and application processes vary by state.
Beyond those two, several states run their own energy-efficiency tax credits and rebates that were not affected by the federal repeal, and many electric and gas utilities discount insulation and air-sealing work through demand-reduction programs. Between state, utility, and federal rebate options, most homeowners planning insulation work in 2026 still have somewhere to look.