After the initial legislation expired after 1999, the PTC was allowed to lapse for a year, as it was again after 2001 and 2003. As the wind industry lobby has noted, wind development dropped precipitously in years when the PTC was not available
for investors to avoid taxes.<ref>American Wind Energy Association. 2015. “Wind Energy and the PTC”.</ref>
In 2015, legislation ended the PTC for non-wind renewables after 2016 and established a phase-out for wind. Facilities claiming the PTC in 2017 will get 80% of the 2016 value, in 2018 60%, and in 2019 40%. After 2019, new facilities will not be able to claim the PTC.