According to Uncle Sam, you need to be "materially involved" in an enterprise to earn active income. With passive income, it's just the opposite, as the IRS deems you to be earning passive income if you're not materially involved with a profit-making enterprise. By and large, expect income to be taxable if you are engaged in a passive income enterprise. You will need to report earnings to the IRS.
I’ve had more jobs than I can count since I ‘officially started working’ at the age of 14. And I say officially because I was always hustling as a kid. There were the ordinary things like lemonade stands and selling my old junk at our family’s yard sales but I could get pretty creative when it came to making money. In high school, I remember asking my mom to give me extra bags of chips and snacks in my lunch so that I could re-sell them to my classmates for 75 cents or even a dollar. I was kind of a chubby kid so I guess my mom just figured I liked to snack a lot.
Portfolio income can come from multiple sources – interest/bond coupons, stock dividends, financial strategies including derivatives and capital growth.  Each offers some cash flow and some also offer potential capital gain with some risk from liquidity and volatile prices.  In this low-yield environment, many investors rely too heavily on cash flows and to pursue this are venturing further into riskier areas than they’d normally consider.