Energy Freedom and Economic Prosperity Act - Amends the Internal Revenue Code to repeal: (1) the excise tax credits for alcohol fuel, biodiesel, and alternative fuel mixtures; (2) the tax credits for the purchase of certain plug-in electric vehicles and alternative motor vehicles; (3) the alternative fuel vehicle refueling property tax credit; (4) the tax credits for alcohol used as fuel and for biodiesel and renewable diesel used as fuel; (5) the enhanced oil recovery tax credit and the tax credit for producing oil and gas from marginal wells; (6) the tax credit for carbon dioxide sequestration; (7) the energy tax credit; and (8) the tax credits for investment in qualifying advanced coal projects and qualifying gasification projects. Terminates after 2012 the tax credits for the production of electricity from certain renewable resources and from advanced nuclear power facilities.
Repeals the grant program under the American Recovery and Reinvestment Act of 2009 for payments to invest in alternative and renewable energy property in lieu of tax credits.
Directs the Secretary of the Treasury to prescribe a flat income tax rate for corporations, in lieu of the existing marginal tax rates, based upon the overall revenue savings from the repeal of energy tax subsidies by this Act.