If you don’t know what Net Investment Income Tax (NIIT) is, you’re not alone. This relatively new tax began a little over a decade ago but the number of taxpayers subject to the tax has increased.

Net investment income (NII), for tax purposes, is the total amount of money received from assets such as stocks, bonds, and mutual funds, minus related expenses. NII may include interest income ...

Virojt Changyencham / Getty Images Gross profit and net income are critical profitability metrics for any company. But, they are inherently different. Gross profit represents the income or profit ...