Note: The Consolidated Appropriations Act, signed in December 2015, included several amendments to this credit which applied only to solar technologies and PTC-eligible technologies. However, the Bipartisan Budget Act of 2018 reinstated this tax credit for the remaining technologies that have historically been eligible for the credit.
The federal Business Energy Investment Tax Credit (ITC) has been amended a number of times, most recently in February 2018. The table below shows the value of the investment tax credit for each technology by year. The expiration dates are based on when construction begins.