The federal 25C insulation tax credit is no longer available for new projects completed in 2026. The credit ended for qualifying property placed in service after December 31, 2025, according to the IRS.
That change is disappointing for homeowners planning an insulation upgrade. However, the end of 25C does not eliminate every way to save. Homeowners in Western Kentucky, Northwest Tennessee, Southern Illinois, and Southeastern Missouri can still look for utility incentives, weatherization assistance, state rebate programs, and the ongoing savings created by a properly insulated home.
The best approach is to identify every available incentive before work begins, then choose an insulation solution that provides long-term cost savings on energy bills.
What Happened to the 25C Insulation Tax Credit?
The Energy Efficient Home Improvement Credit, commonly called the 25C tax credit, previously helped homeowners offset the cost of eligible improvements such as:
- Attic, wall, and floor insulation
- Air-sealing materials
- Energy-efficient windows and doors
- Heat pumps and other qualifying equipment
The IRS now states that the credit does not apply to property placed in service after December 31, 2025. In practical terms, an insulation project installed during 2026 generally cannot receive the former federal 25C credit.
Homeowners who completed qualifying work in 2025 should keep their invoices, product information, and installation records. They may still be able to claim the applicable credit on a 2025 federal tax return, provided all requirements were met. A tax professional can help determine eligibility.
For 2026 projects, the focus should shift from a federal tax credit to rebates, utility programs, weatherization assistance, and monthly energy savings.
State HOMES and HEAR Rebates Are Still Being Developed
The federal Home Energy Rebates initiative includes two major programs:
- HOMES, which supports whole-home energy-efficiency improvements
- HEAR, which focuses on home electrification and qualifying efficiency upgrades
These programs are different from a tax credit. They are administered through state agencies, and each state controls its own launch process, eligibility requirements, approved contractors, and rebate procedures.
Kentucky Home Energy Rebates
Kentucky’s official Home Energy Rebates website states that the program is not yet accepting applications. Kentucky must receive additional approval from the U.S. Department of Energy before launching the program.
The planned program may support improvements such as:
- Adding insulation
- Air sealing
- HVAC upgrades
- Appliance improvements
- Electrical panel and wiring upgrades
Kentucky has also stated that retroactive rebates will not be available. Homeowners should not assume that work completed before the program launches will qualify later.
The state recommends signing up for Kentucky Home Energy Rebates updates so homeowners can monitor the official launch timeline.
Tennessee Home Energy Rebates
Tennessee’s HOMES and HEAR programs were still pending public availability as of the latest 2026 program information. Homeowners should monitor the U.S. Department of Energy’s Home Energy Rebates page and announcements from the Tennessee energy office.
Until the state program opens, Tennessee homeowners should focus on available utility programs, particularly in areas served by TVA and participating local power companies.
Utility Rebates Can Help Lower the Upfront Cost
Utility programs are often the most immediate source of assistance for insulation and air sealing. Eligibility depends on the homeowner’s location, utility provider, equipment, installation requirements, and program funding.
TVA EnergyRight Rebates
Many homeowners in Northwest Tennessee and nearby areas receive electricity through TVA or a participating local power company. The TVA EnergyRight residential rebate program currently lists incentives for:
- Up to $500 for attic insulation
- $300 for wall insulation
- $300 for air sealing
- $300 for duct sealing and insulation
TVA requires rebate-eligible upgrades to be completed by a contractor in its Quality Contractor Network and to meet program standards in effect on the installation date. Homeowners should confirm eligibility before signing a contract.
TVA also offers free or low-cost home energy assessments that can help identify whether the largest problem is in the attic, walls, ductwork, or another part of the building envelope.
Kentucky Power Assistance
Kentucky Power offers a Targeted Energy Efficiency Program for qualifying residential customers who need help reducing energy costs and improving home comfort.
Depending on program guidelines, services may include:
- Energy audits
- Air-leak testing
- Air sealing
- Attic, floor, and side-wall insulation
- Duct sealing and insulation
- High-efficiency lighting
- Water-heater insulation
The program is income-qualified and has specific electric-heating and usage requirements. Customers should contact their local community action agency to determine eligibility.
LG&E and KU Programs
Homeowners in the LG&E and KU service territories can review the utility’s residential energy-efficiency programs. Available options include rebates for qualified equipment, online energy assessments, and the income-qualified WeCare program.
WeCare may provide eligible homeowners and renters with energy-saving upgrades such as:
- Insulation
- Air sealing
- LED lighting
- Smart thermostats
- HVAC tune-ups
Program availability and qualifying requirements can change, so homeowners should verify current details directly with LG&E or KU.
Southern Illinois and Southeastern Missouri Options
The incentive landscape differs across Southern Illinois and Southeastern Missouri.
The Illinois Environmental Protection Agency’s energy rebate page states that the Illinois HOMES program launch is pending federal approval. The state’s HEAR application had also not yet been processed at the time of the latest update.
Illinois residents can still explore:
- Electric and natural gas utility rebates
- The Illinois Home Weatherization Program
- LIHEAP utility assistance
In Missouri, the Department of Natural Resources reports that the state’s HOMES and HEEHR programs may not be available until 2027 at the earliest, and potentially as late as 2028.
Missouri homeowners should investigate current utility programs and the state’s Weatherization Assistance resources rather than waiting for a rebate program that is not yet open.
Insulation Still Pays Through Lower Energy Use
Even without the 25C credit, insulation can provide meaningful financial value over time. A properly insulated home places less demand on the heating and cooling system. That can lead to:
- Lower monthly energy use
- More consistent indoor temperatures
- Fewer hot and cold spots
- Reduced air conditioner and furnace runtime
- Better humidity control
- Less strain on HVAC equipment
- Improved indoor comfort throughout the year
The Department of Energy identifies insulation and air sealing as cost-effective ways to reduce heating and cooling costs, improve durability, and increase comfort.
The correct material depends on the structure and project goals. Blown-in fiberglass and cellulose provide broad coverage in attics and can fill around ductwork, wiring, and other obstacles. Spray foam insulation expands into gaps and creates a seamless air seal around irregular surfaces.
A professional spray foam insulation contractor can recommend either open-cell or closed-cell foam based on the location, moisture exposure, desired R-value, and budget. Closed-cell foam provides a dense, moisture-resistant barrier with a high R-value per inch. Open-cell foam expands significantly and can be useful for air sealing and sound reduction in appropriate applications.
The initial cost of spray foam may be higher than fiberglass batts or loose-fill insulation. However, the long-term return can include reduced energy waste, improved comfort, and lower HVAC wear. The best choice is not always the least expensive material. It is the material that performs correctly for the building.
How to Maximize Your Savings in 2026
Before beginning an insulation project, homeowners should follow a clear process:
- Identify your electric and gas providers. Utility programs are based on service territory.
- Check official rebate requirements. Confirm income limits, eligible improvements, contractor rules, and application deadlines.
- Ask whether pre-approval is required. Some programs do not accept applications after work is complete.
- Schedule an energy assessment when available. An assessment can help prioritize attic insulation, air sealing, wall insulation, or ductwork.
- Keep all documents. Save estimates, invoices, product information, permits, and installation dates.
- Compare the full project value. Consider energy savings, comfort, durability, moisture control, and HVAC performance.
- Use a qualified contractor. Proper installation is essential for insulation to achieve its expected performance.
At Armored Insulation, we evaluate the existing insulation, identify gaps and air leaks, and recommend a custom-designed solution. Our services include attic insulation, spray foam insulation, batt insulation, blown-in-wall systems, and insulation removal and replacement.
We can also help homeowners understand which questions to ask utility providers and state rebate administrators. Incentive eligibility must always be confirmed through the official program, and rebates may have limited funding or specific contractor requirements.
The Credit Is Gone, but the Savings Are Not
The federal 25C insulation tax credit has ended for new 2026 installations. That is important to understand before planning a project.
However, homeowners across Western Kentucky, Northwest Tennessee, Southern Illinois, and Southeastern Missouri still have practical ways to reduce the cost of energy improvements. Utility rebates, income-qualified programs, weatherization assistance, future HOMES and HEAR rebates, and ongoing energy savings can all contribute to a stronger return on investment.
If your attic is under-insulated, your home has noticeable drafts, or your HVAC system runs constantly, professional insulation may still be one of the most effective upgrades available.
Contact Armored Insulation for a free estimate. We will review your needs, explain your options, and provide a clear recommendation for improving comfort and energy efficiency.