This document summarizes tax credits available for residential energy efficient improvements and alternative energy property installed in a principal residence in the US. It outlines that a 30% tax credit is available for qualifying energy efficient improvements and residential energy property, up to $1,500 total for 2009 and 2010. It also provides details on efficiency standards for improvements and defines eligible alternative energy property that qualifies for a separate 30% tax credit, including solar, wind, and geothermal energy systems. The presentation stresses the complexity of the tax credits and advises consulting a tax advisor.