At our renewable energy tax credit conference yesterday, a question came up regarding the level of federal subsidies for renewable energy as compared to fossil fuels. 

A study released by the Environmental Law Institute back in 2009 estimated that for the time period from 2002 to 2008  Fossil Fuels received more than two dollars in federal subsidies for every one dollar for renewable energy ($72.5 billion for fossil fuels and renewable energy received $29.0 billion).

For more analysis, here is a link to a blog post from March 2012 by Henry Auer that goes into detail on the above study, and one other.