Congress enacted a minimum tax in 1969 to guarantee that high-income individuals paid at least some tax. The AMT now threatens to grow from a footnote in the tax code to a major component affecting tens of millions of taxpayers. Although most lower- and middle-income taxpayers will remain unaffected by it, policymakers need to deal with the explosive growth of the AMT from an obscure tax affecting only 20,000 filers in 1970 to one affecting more than 33 million-a third of all taxpayers-by 2010. This document provides updated estimates of AMT participation, revenue, and distribution.

Congress enacted a minimum tax in 1969 to guarantee that high-income individuals paid at least some tax. The AMT now threatens to grow from a footnote in the tax code to a major component affecting tens of millions of taxpayers. Although most lower- and middle-income taxpayers will remain unaffected by it, policymakers need to deal with the explosive growth of the AMT from an obscure tax affecting only 20,000 filers in 1970 to one affecting more than 33 million-a third of all taxpayers-by 2010. This document provides updated estimates of AMT participation, revenue, and distribution.

Tax and fiscal policy will loom large in the next president's domestic policy agenda. Nearly all of the tax cuts enacted since 2001 expire at the end of 2010 and the individual alternative minimum tax (AMT) threatens to ensnare tens of millions of Americans. While a permanent fix palatable to both political parties has proven elusive, both candidates have proposed major tax changes. This summary outlines our analysis of the 2008 presidential candidates' tax plans. The full length report is also available.