The Section 25C Energy Efficient Home Improvement Credit for insulation expired on December 31, 2025. It is no longer available for projects completed in 2026 or later.
If you installed qualifying insulation in your home during 2025 or earlier, you can still claim the credit on your 2025 federal tax return (filed during the 2026 tax season). If you are planning an insulation project in 2026, the federal tax credit does not apply, but other incentives do. This page explains what happened, how to claim the credit if you are eligible, and what financial incentives remain for DFW homeowners upgrading insulation today.
What Happened to the 25C Insulation Tax Credit
The Section 25C credit was part of the Inflation Reduction Act of 2022 (IRA). It allowed homeowners to claim 30% of the cost of qualifying insulation materials (not labor) as a federal tax credit, up to $1,200 per year for insulation, air sealing, windows, and doors combined.
The credit was originally scheduled to run through December 31, 2032.
On July 4, 2025, the One Big Beautiful Bill Act (OBBBA, Public Law 119-21) was signed into law. This legislation accelerated the termination of several IRA energy credits, including Section 25C. The IRS confirmed the new termination date in Fact Sheet 2025-05, published August 21, 2025:
Section 25C is not allowed for any property placed in service after December 31, 2025.
The credit is gone. It was not extended, replaced, or modified. For insulation projects completed in 2026 and beyond, there is no federal tax credit.
A Warning About Outdated Information Online
As of May 2026, multiple high-ranking websites still claim the 25C insulation tax credit is available “through 2032.” Some were published before the OBBBA became law and were never updated. Others were published after the expiration and are simply wrong.
If you find a page that says the federal insulation tax credit is still active in 2026, check the publication date and sources. The IRS has published clear guidance confirming the expiration. The Alliance to Save Energy, Rewiring America, and multiple CPA firms have confirmed the same.
Green Attics provides updated information because DFW homeowners deserve accurate guidance, not recycled content from 2024.
If You Insulated in 2025: How to Claim the Credit
Homeowners who completed qualifying insulation projects on or before December 31, 2025 can claim the Section 25C credit on their 2025 federal tax return. Here is how.
What Qualified
The 25C credit covered materials only, not labor. Qualifying insulation products included:
- Blown-in fiberglass and cellulose
- Spray foam insulation (open-cell and closed-cell)
- Fiberglass and mineral wool batts
- Rigid foam board insulation
- Air sealing materials (caulk, spray foam sealant, weatherstripping, house wrap) if accompanied by a Manufacturer’s Certification Statement
The insulation had to meet the prescriptive criteria established by the IECC for the climate zone where the home is located. For DFW (Zone 3A), that means meeting or exceeding R-38 for attic installations.
Credit Amounts
- 30% of qualifying material costs (labor excluded)
- Up to $1,200 per year for the combined total of insulation, air sealing, windows, doors, and skylights
- The credit is nonrefundable, meaning it can reduce your tax liability to zero but cannot generate a refund
- There is no carryover. Any unused credit from 2025 is lost.
How to File
- Gather documentation. Keep receipts showing material costs separated from labor. Save the Manufacturer’s Certification Statement for each qualifying product. Your insulation contractor should provide both.
- Complete IRS Form 5695 (Residential Energy Credits), Part II.
- Transfer the credit amount to Schedule 3 of your Form 1040.
- File with your 2025 return. If you have already filed your 2025 return without claiming the credit, you can file an amended return (Form 1040-X).
Consult a tax professional. Green Attics is an insulation contractor, not a tax advisor. We provide the documentation you need. Your CPA or tax preparer handles the filing.
Worked Example
A DFW homeowner had blown-in cellulose installed in their 1,500 sq ft attic in October 2025. The total project cost was $2,800: $1,600 in materials and $1,200 in labor.
- Qualifying material cost: $1,600
- 30% credit: $480
- Annual cap: $1,200 (not exceeded)
- Tax credit claimed on 2025 return: $480
That $480 is a direct reduction of the homeowner’s federal tax bill.
What Is Available for DFW Homeowners in 2026
The 25C credit is gone, but insulation upgrades still make financial sense. Here is what remains.
Oncor Take a Load Off Texas
Oncor, the transmission and distribution utility serving most of DFW, offers incentives for insulation and air sealing through its Home Energy Efficiency (HEE) program. Incentives are calculated per square foot and paid directly to Oncor-approved service providers, who pass the savings through as a reduced project cost.
To qualify:
- Your home must be in Oncor service territory
- Existing attic insulation must be R-22 or below
- The upgrade must reach R-38 or better
- Work must be performed by an Oncor-approved contractor
- A blower door test and CO safety check are required
Green Attics is an Oncor-approved participating service provider. We handle the application process for every qualifying project. For full details, see our Oncor rebates for insulation guide.
Oncor Low-Income Weatherization (LIW)
Households with income at or below 200% of the federal poverty guidelines may qualify for insulation, air sealing, and HVAC upgrades at low or no cost through Oncor’s LIW program. Dial 2-1-1 to check eligibility.
Energy Savings ROI (The Incentive That Never Expires)
Even without any rebate or tax credit, attic insulation pays for itself through lower energy bills.
A typical DFW attic insulation project costs $1,500 to $4,500 depending on material and scope. Annual HVAC savings from upgrading to R-38 with air sealing typically range from $300 to $700 for homes with old, degraded insulation. That is a 3-to-10-year payback period. The insulation lasts 30+ years.
Texas residential electricity rates hit 15 to 16 cents per kWh in 2026, up 5% to 6% from the prior year. Rising rates make the payback shorter every year, because the energy you do not waste costs more each year.
The 25C credit was worth $200 to $480 on a typical insulation project. That is helpful, but it is a fraction of the lifetime energy savings. The project makes sense with or without the credit.
The Bigger Picture: What the Credit Covered vs What Actually Saves Money
The 25C credit was structured to cover materials only, capped at $1,200 per year for envelope improvements. For a typical DFW attic insulation job, the credit covered $200 to $480.
Compare that to the total value of the upgrade:
| Factor | 25C Credit Value | Lifetime Energy Savings | Oncor Incentive |
| Typical amount | $200 – $480 (one-time) | $6,000 – $14,000+ (over 20 years) | Varies by project (reduces upfront cost) |
| Available in 2026 | No | Yes | Yes (while funds last) |
| Requires paperwork | IRS Form 5695 | None | Handled by approved contractor |
The credit was a nice bonus. It was never the reason to insulate. The reason to insulate is that your attic hits 140°F in July, your HVAC runs nonstop, and your electricity bill proves it every month.
Frequently Asked Questions
Is the federal insulation tax credit still available in 2026?
No. The Section 25C Energy Efficient Home Improvement Credit expired December 31, 2025. The One Big Beautiful Bill Act (signed July 4, 2025) accelerated the termination from the original 2032 deadline. Insulation projects completed in 2026 or later do not qualify for any federal tax credit. If you find a website that says otherwise, it has not been updated.
When did the 25C insulation tax credit expire?
December 31, 2025. The IRS confirmed the new termination date in Fact Sheet 2025-05 (August 21, 2025). Only insulation installed and placed in service on or before that date qualifies.
Can I still claim the insulation tax credit for work done in 2025?
Yes. If your insulation project was completed and placed in service by December 31, 2025, you can claim the credit on your 2025 federal tax return using IRS Form 5695. The credit covers 30% of qualifying material costs (not labor), up to $1,200 per year. File it with your 2025 return during the 2026 tax season.
What tax form do I use for the insulation tax credit?
IRS Form 5695 (Residential Energy Credits), Part II. The credit amount transfers to Schedule 3 of your Form 1040. You will need receipts separating material costs from labor costs, plus the Manufacturer’s Certification Statement for each qualifying product.
What replaced the 25C tax credit for insulation?
Nothing at the federal level has replaced it for 2026. However, DFW homeowners can access Oncor’s Take a Load Off Texas incentives for insulation and air sealing, the Weatherization Assistance Program (WAP) for income-qualifying households, and the direct energy savings from lower utility bills.
Are there any insulation rebates available in Texas?
Yes. Oncor offers per-square-foot incentives for attic insulation upgrades (existing insulation R-22 or below, upgraded to R-38 or better) through its Home Energy Efficiency program. The program runs annually from approximately February through November, with first-come-first-served funding. Green Attics is an Oncor-approved contractor and handles the application process for qualifying projects.
Next Steps for DFW Homeowners
Whether you are filing for a 2025 insulation project or planning a 2026 upgrade, the first step is the same: know what your home actually needs.Green Attics offers a free energy audit that measures your current insulation levels, air leakage, duct performance, and HVAC efficiency. If you completed a project in 2025, the audit documentation supports your 25C claim. If you are planning a 2026 project, the audit identifies Oncor incentive eligibility and shows you the fastest-payback upgrades.
