
Net Investment Income Tax (NIIT): A 3.8% Surtax Guide for High Earners and Investors
The 3.8% Net Investment Income Tax kicks in once MAGI crosses $200,000 single or $250,000 joint—thresholds frozen since 2013. This guide explains who pays NIIT, how Form 8960 calculates it, which income types count (interest, dividends, capital gains, passive rentals) and which don't (wages, IRA distributions, muni interest), plus planning levers to cut exposure.










