Making a budget doesn't have to be hard, but there are a few simple mistakes you'll need to avoid. One of the most common missteps people make is getting their gross and net income mixed up.

The net investment income tax (NIIT) is a 3.8 percent tax on net investment income for individuals exceeding certain income ...

In 2013, a tax on net investment income of 3.8% was adopted and applied to individuals and married couples making certain minimum amounts of modified adjusted gross income (MAGI) in a given tax year.

When they file their returns this year, high-income taxpayers should be prepared for an additional hit. The net investment income tax (NIIT) has been around for more than a decade, but it's not as ...