The individual alternative minimum tax (AMT) was intended to guarantee that high income people paid at least some tax, but it is poorly designed. Absent a change in law, close to 30 million taxpayers will become subject to the AMT by 2010. This data update presents new data for the tables in our July 2003 Tax Notes article and expands on the reform options presented in the Spring 2003 Journal of Economic Perspectives article. We also briefly explain the tables.