Net Investment Income Tax: The Basics
If your income hits a certain level, you may face an additional wrinkle in calculating your taxes: the net investment income tax (also referred to as the unearned income Medicare contribution tax). This 3.8% Medicare tax applies to some or all of your net investment income if your modified adjusted gross income (MAGI) exceeds certain thresholds. The tax is in addition to any other income tax applicable to such income.