Here’s a Timeline of the ITC Over the Past Few Decades:
2005: The Energy Policy Act of 2015, authorized under sections 25D and 48 of the US tax code, first created the 30% tax credit for residential and commercial solar energy projects. It was set to expire in 2006.
2006: The ITC was extended for one additional year by the Tax Relief and Health Care Act of 2006.
2008: The Emergency Economic Stabilization Act of 2008 extended the ITC for eight years and eliminated the previous $2,000 cap for residential solar panel systems.
2016–2019: The ITC was extended again for another five years in early 2016 with the Consolidated Appropriations Act of 2016. This extension introduced a step-down approach to the benefit for the eventual sunset of the credit, but for these first few years, the benefit stayed at 30%.
2020–2021: Based on the phase-down percentage introduced in the Consolidated Appropriations Act of 2016, the ITC dropped to 26% in 2020 and was scheduled to drop to 22% in 2021 before Congress extended the ITC at 26% for solar systems installed 2021 with the Better Energy Storage Technology (BEST) Act of 2020.
2022–2032: The ITC dropped to 26% in 2022 until President Biden signed the Inflation Reduction Act of 2022, which bumped the ITC back to 30% and extended it to solar systems installed between 2022 and 2032, after which the ITC will be phased out.
2033: Owners of new residential solar systems installed in 2033 will be entitled to a 26% ITC benefit.
2034: Owners of new residential solar installed in 2034 will be entitled to a 22% ITC benefit.
2035: Unless extended by Congress, there will be no ITC benefit for residential solar installed after 2034.