What’s Happening to the Energy-Efficient Windows Tax Credit?

If you’re considering upgrading your home with energy-efficient windows, you’ve probably heard about the federal tax credit that helps offset the cost. This program, officially called the Energy Efficient Home Improvement Credit (Section 25C), is one of the most popular incentives for homeowners. But many people are asking: what’s happening to it?

How the Credit Works

The Energy Efficient Home Improvement Credit allows homeowners to claim 30% of the cost of qualifying energy-efficient upgrades. For windows and skylights, the maximum credit is $600 per year. This is part of a larger $1,200 annual cap that applies to many home improvements like exterior doors, insulation, and certain HVAC upgrades.

To qualify, replacement windows must meet specific ENERGY STAR® performance standards, ensuring they deliver genuine energy savings. Low-E coatings, double pane or triple pane glass, and other efficiency features are key to eligibility.

What’s Changing in 2025

Starting in 2025, homeowners will face new requirements when claiming the credit. Products will need to be manufactured by a qualified manufacturer, and the tax return must include the manufacturer’s Qualified Manufacturer Identification Number (QMID). This is meant to ensure transparency and prevent misuse of the credit.

Most importantly, the program is set to sunset after December 31, 2025. That means if you want to take advantage of this tax savings opportunity, you need to have your qualifying windows purchased and installed by the end of that year. Unless Congress acts to extend it, the credit will no longer be available starting in 2026.

Why This Matters for Homeowners

Replacing windows can be a significant investment, and this tax credit helps reduce out-of-pocket costs while improving your home’s comfort and efficiency. With energy-efficient windows, many homeowners also see lower monthly heating and cooling bills—creating both short-term and long-term financial benefits.

But with the credit expiring soon, waiting too long could mean missing out on hundreds of dollars in savings.

The Bottom Line

The energy-efficient windows tax credit is a valuable incentive, but it’s temporary. Since the program sunsets after 2025, now is the time to plan your replacement project, lock in professional installation, and maximize your savings before it’s gone.