Energy Tax Credit
Windows, doors and skylights that earn the ENERGY STAR® save energy, improve comfort and help protect the environment. In recognition of this, residential energy property tax credits (aka the “Non-Business Energy Property Tax Credits”) have been retroactively extended from 12/31/2017 through 12/31/2021.
To qualify, windows and patio doors must be ENERGY STAR®-qualified for the region in which they are installed.
Homeowners may claim 10% of the product cost (not including installation).
Homeowners may claim no more than: $200 for windows and skylights; and up to $500 for patio doors. The aggregate amount of the credit is limited to $500. Products must be installed in the taxpayer's primary residence. New construction is not eligible. A taxpayer is ineligible for the credit if the credit has already been claimed in any previous year.
You do not have to replace all the windows/doors/skylights in your home to qualify. Additional information may be found here.