January 31, 2012
To help pay for expanded health insurance coverage, the health reform legislation enacted in 2010 included a new 3.8 percent tax on the net investment income of high-income taxpayers. When it goes into effect in 2013, it will increase the top tax rate on capital gains, dividends, and other investment income, regardless of whether the 2001 and 2003 tax cuts are allowed to expire. Almost all the burden will be borne by taxpayers with extremely high incomes. More than half the burden, for example, falls on taxpayers in the top 0.1 percent of the income distribution.