Energy Tax Credit

Energy Tax Credit for Qualifying RELIABILT Energy Star Windows & Patio Doors


Earn a federal tax credit of up to $1100 for improving your home’s energy efficiency and comfort with windows and doors. Purchase and install RELIABILT ENERGY STAR® Most Efficient certified windows to claim a federal tax credit of up to $600*, while ENERGY STAR certified patio doors can earn a federal tax credit of up to $500*.

Don’t miss your chance to benefit from the Energy Tax Credit. Recent Federal legislation has the tax credit for energy-efficient windows and doors (25C) expiring after 2025. To qualify for the tax credit, homeowners must have eligible products installed by December 31, 2025.

Download the 2023-2025 Manufacturer’s Certification Statement with Qualified Manufacturer (QM) Code


How Much is the Energy Tax Credit?

As part of the Inflation Reduction Act of 2022, annual federal tax credits of up to $1200 are available for energy-efficient home envelope improvements ($1100 for qualifying windows and doors) purchased and installed between January 1, 2023, and December 31, 2032.

Window Tax Credit Amount

  • Claim 30% of the project cost, up to $600 maximum.
  • Windows must meet ENERGY STAR Most Efficient certification.
  • Maximum annual amount with no lifetime limit.

Patio Door Tax Credit Amount

  • You can claim 30% of the project cost, up to $500 ($250 per door).
  • Doors must meet ENERGY STAR requirements for your climate zone.
  • Maximum annual amount with no lifetime limit.

How to qualify for the energy tax credit.*

  1. Purchase and install ENERGY STAR Most Efficient certified Atrium windows or ENERGY STAR certified Atrium patio doors between January 1, 2023, and December 31, 2025.
  2. Save your purchase documentation and sales receipt.
  3. Retain the National Fenestration Rating Council (NFRC) label for each eligible door, as it may be requested by the Internal Revenue Service (IRS). The door NFRC Ratings and ENERGY STAR qualification information is printed on the Atrium NFRC Label adhered to your door.
  4. When completing your federal tax filing, include Cornerstone Building Brands’ Window & Door Qualified Manufacturer (QM) Code C3N5 on Form 5695 for window and door installations that qualify for the Energy Efficient Home Improvement Credit.

Manufacturer’s Certification Statement with QM Code

Download Cornerstone Building Brands Manufacturer’s Certification Statement with the Qualified Manufacturer (QM) Code for your records.

Cornerstone Builder Brands Manufacturer’s Certification Statement Download

Who Can Use the Energy Tax Credit?

Homeowners who complete qualified energy-efficient improvements to their principal residence, including a renovation or addition to their existing home. The home must be in the United States and can include a house, houseboat, mobile home, cooperative apartment, condominium, and manufactured home. New construction homes and rentals are not eligible.

Annual Energy Tax Credit Limits

The Energy Efficient Home Improvement Tax Credit has no lifetime limitation. The annual maximum allows $1,200 in tax credits for all qualifying building envelope components—$1100 for windows and doors. You can maximize your federal tax credit savings each year by making eligible home improvements over time. Visit energystar.gov and irs.gov for additional energy tax credit details, restrictions and limitations.

Find Additional Rebates

You may qualify for additional rebates in your state or community for installing ENERGY STAR certified windows and patio doors. Visit energystar.gov/rebate-finder to learn more.


*Select RELIABILT windows can be ordered to meet ENERGY STAR Most Efficient criteria, and RELIABILT patio doors can be ordered with glass packages that qualify in the specific U.S. ENERGY STAR version 6.0 (7.0 after 10/23/23) climate zones when used for replacement, remodeling or home improvement. Please consult your RELIABILT representative when ordering your windows and patio doors to verify that they meet the required ENERGY STAR guidelines. RELIABILT Windows & Doors is not a tax advisor. Please consult your tax planner and review all IRS guidelines.

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