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Window Energy Tax Credits 2026: What Homeowners Can Actually Claim

Jul 17, 2026

Window Tax Credit 2026: How Much Can Homeowners Claim?

IRS Section 25C statutory requirements, ENERGY STAR Most Efficient product criteria, and IRS Form 5695 filing guidance provide the following information on the federal tax credit for energy-efficient windows in 2026.

TheRemodelers brings together licensed window contractors and energy efficiency professionals to help homeowners understand the federal Energy Efficient Home Improvement Credit for windows, including ENERGY STAR Most Efficient requirements, caps, and how to file.

The federal tax credit for energy-efficient windows is one of the most misunderstood incentives in home improvement. Homeowners hear 30 percent tax credit and assume it covers a significant portion of a window replacement project. In practice, the credit is capped at 600 dollars per year for windows and skylights combined, applies only to the product cost, not installation labor, and requires the windows to meet ENERGY STAR Most Efficient certification, a higher standard than standard ENERGY STAR labeling.

What the Credit Actually Covers

The Energy Efficient Home Improvement Credit, authorized under Internal Revenue Code Section 25C, covers 30 percent of the cost of qualifying energy-efficient improvements. For windows and skylights, the credit is capped at 600 dollars per year. This is a tax credit that reduces your tax bill dollar for dollar. If you spend 2,000 dollars on qualifying windows and owe 3,000 dollars in federal taxes, the credit reduces your tax bill by 600 dollars, not 2,000 dollars. The credit applies to the product cost only. Installation labor, sales tax, and permit fees are not eligible. A 2,000-dollar window replacement where the windows cost 800 dollars and labor costs 1,200 dollars qualifies for a credit of 30 percent of 800 dollars, or 240 dollars. The 600-dollar window cap sits within a broader 1,200-dollar annual cap for the overall credit, which covers windows, skylights, exterior doors, insulation, and electrical panel upgrades. Heat pumps have a separate 2,000-dollar annual cap.

ENERGY STAR Most Efficient: The Certification That Matters

The credit requires windows and skylights to meet ENERGY STAR Most Efficient criteria, a higher tier than standard ENERGY STAR certification. A window labeled ENERGY STAR but not ENERGY STAR Most Efficient does not qualify. The list of qualifying products is at energystar.gov/most-efficient and should be checked before purchasing. Starting with products installed in 2025 and later, manufacturers must provide a Product Identification Number and a Qualified Manufacturer Identification Number. The manufacturer must be registered with the IRS for their products to qualify. The home must be your principal residence, not a rental or vacation home. The credit is available through 2032 under current law.

What the Credit Means in Practice

For a whole-house replacement of 15 windows, the qualifying product cost might be 6,000 to 12,000 dollars. Thirty percent is 1,800 to 3,600 dollars, but the annual credit is capped at 600 dollars. The homeowner claims 600 dollars this year with no carryforward. The credit is most valuable when replacing a few windows per year where the qualifying product cost is close to the 2,000 dollars needed to reach the 600-dollar cap. State and utility incentives exist separately and may provide additional savings of 50 to 200 dollars per qualifying window.

For more on window decisions, the window frame materials comparison and the egress window requirements guide cover additional window topics.

Final Thoughts

The information in this guide is based on current industry cost data and contractor pricing surveys. Costs vary by region, project complexity, and material selection. Getting multiple quotes from licensed contractors is the best way to get an accurate price for your specific project.

When you are ready to get estimates from licensed contractors in your area, contact Home Upgrade Pros or call: (725) 313-0738 to connect with professionals who offer free no-obligation assessments.

Frequently Asked Questions

How much is the federal tax credit for energy-efficient windows?

The credit is 30 percent of the product cost, materials only, capped at 600 dollars per year for windows and skylights combined. Windows must meet ENERGY STAR Most Efficient certification. Standard ENERGY STAR labeling does not qualify.

Can I claim the window tax credit for installation labor?

No. The 30 percent applies only to the window product cost. Installation labor, sales tax, and permit fees are excluded. On a 2,000-dollar replacement where windows cost 800 dollars and labor 1,200, the credit is 30 percent of 800 dollars, or 240 dollars.

How long is the window tax credit available?

Under current law, the Energy Efficient Home Improvement Credit is available through 2032. The credit is annual and non-refundable. Replacing a few windows per year over multiple years maximizes the total credit compared to doing all windows at once.