This document summarizes the issue of high-net-worth taxpayers becoming subject to the Alternative Minimum Tax (AMT) even when they do not have traditional preference items. It develops an analytical framework to predict the probability a taxpayer will be subject to the AMT based solely on the percentage of total income from long-term capital gains and the state tax rate. The key factors are that state taxes are deductible for regular tax but not AMT, and the declining difference between regular and AMT rates exacerbates this issue. The framework is then applied to examples comparing regular tax liability to AMT liability at different income levels and capital gains percentages.