Episode 15 of Retirement Tax Matters demystifies the 3.8% Net Investment Income Tax (NIIT), a surtax that is increasingly trapping high-net-worth retirees due to income thresholds ($200,000 for singles, $250,000 for married couples) that have not been adjusted for inflation since 2013. We explain the specific “Lesser of" calculation used by the IRS, illustrating how this tax applies to your dividends, interest, and capital gains once your Modified Adjusted Gross Income (MAGI) exceeds those fixed limits.