"The renewable electricity production tax credit (PTC) expired on January 1, 2014. The renewable electricity PTC is a per-kilowatt-hour tax (kWh) credit for electricity generated using qualified energy resources. Whether the PTC should be extended, modified, or remain expired is an issue being considered in the second session of the 113th Congress. The PTC was initially enacted to promote the development of renewable energy resources, and it has been extended multiple times in an effort to continue advancing this policy goal. While some Members of Congress support extension or modification of the PTC, others say that the PTC should be allowed to expire. Extension of the PTC may be considered as part of 'tax extenders' legislation. The PTC for wind and closed-loop biomass was first enacted in 1992. When first enacted, the PTC was scheduled to expire on July 1, 1999. Since 1999, the PTC has been extended eight times. On three occasions, the PTC was allowed to lapse before being retroactively extended. Including the present expiration, the PTC has been allowed to lapse four times. In addition to being extended, the PTC has also been expanded over time to include additional qualifying resources. In 2013, wind, closed-loop biomass, and geothermal technologies qualified for the full credit amount of 2.3-cents per kWh. Other technologies (open-loop biomass, small irrigation power, landfill gas, trash, qualified hydropower, marine and hydrokinetic) qualify for a half-credit amount, or 1.1-cents per kWh in 2013. Credit amounts are adjusted annually for inflation."
CRS Report for Congress, R43453