The Investment Tax Credit (hereinafter "ITC") is a 30% federal tax credit for solar systems on residential properties under Sec. 25D of the Code, and for commercial properties under Sec. 48 of the Code that remains in effect through December 31, 2016. The Sec. 48 commercial ITC is used for utility-scale, commercial and residential sized projects. The company that installs, develops or finances the project uses the credit. The Sec. 25D residential ITC is used for residential sized projects, and the homeowner applies the credit to their individual income taxes. The credit is used when homeowners purchase solar systems outright and have them installed on their homes.