From fractional stock investing to print-on-demand T-shirts, here are six ways to generate passive income with only $20. Earning passive income doesn't need to be difficult. You can start this week.

Passive income is any source of revenue you earn when you're doing something else. For instance, if you sell T-shirts at a local festival, you’ll earn money every time you make a sale.

DON'T MISS: The ultimate guide to earning passive income online Print-on-demand lets me sell items like t-shirts and coffee mugs with custom designs on them. I don't pay a dime for any of the ...