In order to claim the credit for 2025, you will need the QMID from the manufacturer and they must meet energy star criteria and ONLY the cost of the windows is considered for the credit, not the cost of installation. One thing you can do is use a "reasonable estimate" to determine the price of the windows versus the cost of labor. The credit is limited to $600 total for your windows. This means, anything you allocate over $1,800 is not going to affect your credit.
Make sure you meet the necessary criteria as a buyer and the exterior doors, windows, skylights and insulation materials you plan to buy are eligible for the credit.
Step 1: Check eligibility
Step 3: Get documentation
While documentation is not required to be filed with your tax return, it may be required if your tax return is audited. The IRS strongly recommends you retain your purchase receipts and installation records as well as any Energy Star and/or National Fenestration Rating Council labels affixed to the windows, skylights, and doors. These documents will also be needed to substantiate your adjusted basis if the property is eventually sold.
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