Window Replacement Tax Credit: What Changed for 2026 and What You Can Still Claim

Here’s the straight answer: there is no federal window replacement tax credit for windows installed in 2026. The Section 25C Energy Efficient Home Improvement Credit, which paid homeowners 30 percent of qualifying window costs up to $600 per year, ended for products placed in service after December 31, 2025 under the federal tax law signed in July 2025. The one exception worth knowing: if your qualifying windows were installed during 2025, you can still claim that credit on the 2025 tax return you file in 2026.

We’re roofers and remodelers, not accountants, so treat this as a neighborly briefing rather than tax advice, and confirm your specific situation with a tax professional or at irs.gov. But since we quote window projects across Westmoreland and Allegheny counties every week, we’ve had this conversation at a lot of kitchen tables lately. Here’s where things stand and what it means for your project.

What the 25C Tax Credit Was

For tax years 2023 through 2025, the Energy Efficient Home Improvement Credit, known by its tax code section as 25C, let homeowners claim 30 percent of the cost of qualifying energy efficiency upgrades to an existing primary residence. For windows and skylights, the credit was capped at $600 per year, and only products certified to the ENERGY STAR Most Efficient tier qualified. Exterior doors had their own cap of $250 per door and $500 total, and the overall annual limit for most building envelope improvements was $1,200. The credit applied to product cost, not installation labor, and it reduced your tax bill dollar for dollar rather than just lowering taxable income.

It was a genuinely useful program, and plenty of our customers used it. Which is exactly why the change matters.

What Changed and When

The federal budget law signed on July 4, 2025 repealed the 25C credit ahead of its original schedule. The cutoff was December 31, 2025: qualifying improvements placed in service on or before that date can still earn the credit, while anything placed in service on or after January 1, 2026 cannot. The companion residential clean energy credit under Section 25D, which covered solar and similar systems, ended on the same timeline.

So if you’re searching for an energy tax credit for windows in 2026, the honest answer is that the federal program is gone as of this writing. Congress can always create new incentives, and we’ll update this post if that happens, but we’re not going to promise you a credit that doesn’t currently exist.

Installed Windows in 2025? You Can Still Claim

If we or another contractor put qualifying windows in your home during 2025, don’t leave that money on the table. A few things to know when you file:

• Use IRS Form 5695, Residential Energy Credits, with your federal return, and claim the credit for the year the windows were placed in service.
• Check the certification. The windows must have met ENERGY STAR Most Efficient criteria, which is a stricter tier than base ENERGY STAR. Your order paperwork or the manufacturer’s certification statement will confirm this.
• Keep your records. Hold onto the contract, invoices, and product documentation. For 2025 installations, manufacturers were also required to provide a product identification number, called a PIN, from a qualified manufacturer, so keep that with your file.
• Remember the caps. The windows credit maxed out at $600 for the year, and it was nonrefundable, meaning it could reduce your tax bill to zero but not below.

Again, a tax professional can confirm eligibility for your exact return. Our job is making sure you don’t forget to ask.

Does No Credit Mean You Should Wait on New Windows?

Honestly, no, and here’s our reasoning. The tax credit was capped at $600, which was a nice bonus but never the main financial case for replacement. The main case is the house itself. The Department of Energy estimates that heat gained and lost through windows accounts for roughly 25 to 30 percent of residential heating and cooling energy use, and in our climate, with furnaces running hard from November to March and freeze and thaw cycles working on old frames all winter, leaky windows collect their own tax from you every month.

Modern double pane vinyl windows with low E glass and argon fill dramatically outperform the original units still sitting in thousands of 1950s and 1960s homes around Irwin, North Huntingdon, and Greensburg. Beyond the energy math, new windows end the drafts, quiet the road noise, tilt in for easy cleaning, and stop the yearly scrape and paint routine. Our local pricing guide on window replacement in Pittsburgh breaks down what projects actually cost here, and you can compare styles and materials on our windows service page.

Other Ways to Save on Windows in 2026

The federal credit may be gone, but you’ve still got options:

• Utility rebates. Pennsylvania electric and gas utilities offer efficiency programs that change from year to year. Check your own utility’s current offerings before you buy, since some include window or insulation incentives.
• Right sized products. Not every opening needs the priciest glass package. We’ll tell you where upgraded glass earns its keep, like big west facing units, and where standard low E does the job.
• Financing. Spreading the project out keeps it from competing with the rest of life. Our financing options make monthly payments manageable, and the energy savings start offsetting them immediately.
• Whole project timing. Combining windows with siding or trim work saves on labor and gets your exterior sealed as one system instead of piece by piece.

Frequently Asked Questions

Are window replacements tax deductible in 2026?
For a typical primary residence, no. The federal 25C credit ended for installations after December 31, 2025, and regular home improvements aren’t deductible. They can, however, add to your home’s cost basis, which may matter when you sell. Ask your tax preparer.

Can I still claim windows I had installed in 2025?
Yes. Windows placed in service on or before December 31, 2025 that met ENERGY STAR Most Efficient criteria can be claimed on your 2025 return using Form 5695, up to the $600 annual cap.

Did the door and insulation credits end too?
Yes. The entire 25C credit, covering doors, windows, insulation, and qualifying HVAC equipment, ended on the same December 31, 2025 timeline.

Will the window tax credit come back?
Nobody knows. Federal incentives have come and gone several times over the past twenty years. We’ll keep this post updated, and your tax professional will have the latest at filing time.

Get Real Numbers for Your Home

Tax rules change, but the drafts coming through a worn out window are wonderfully consistent. If you’re weighing a window project this year, let’s start with facts instead of guesses. We’ll inspect every opening, show you exactly which windows are costing you, and price the project honestly, with zero pressure and thirty years of local reputation behind the number. Schedule your free inspection at mybellaroof.com today.