The 3.8% NIIT applies to the lesser of your NII or your excess modified adjusted gross income (MAGI) above an annual threshold of $200,000 for single filers and $250,000 for joint filers. For example, net investment income includes interest and dividends, capital gains and gains from passive activities. Certain other items, However, IRA and qualified retirement plan distributions and income from an active business don’t count as NII. Accordingly, I… Read More