The Net Investment Income Tax (NIIT) is an extra 3.8% levy on certain investment income for high-wage earners. For NIIT purposes, those capitals gains include not only stocks and real estate but also gold and crypto. Keep in mind that tax-exempt interest is not included in your MAGI for NIIT purposes, which could help you below stay below the threshold. You report NIIT using a form 8960, Net Investment Income Tax-Individuals, Estates, and Trusts (downloads as a pdf). For your taxes from A to Z, here's the rest of the series:For the 2018 tax brackets and other numbers, check out this post.

Source: Forbes March 27, 2018 18:22 UTC