“One hitch in receiving the tax credit is that the Energy Policy Act limits the number of vehicles from an automaker that can receive the credit. Once a manufacturer sells 60,000 vehicles, the credit gradually decreases over a period of 15 months until it is phased out entirely. While the act keeps the tax credit in effect until 2010, some automakers could conceivably sell their maximum number of qualifying vehicles much sooner. Toyota, for example, which sold about 130,000 Priuses in 2005, will likely reach the 60,000-vehicle maximum in the middle of 2006.”

FYI.