Think of the money. Of course, not all niches, no matter how specialized, are profitable. Some don’t have that powerful of an industry attached to them. Others are simply too scientific, academic, esoteric, or, conversely, over-exploited. To get a feel of the niches you’ve narrowed your list down to, you have several types of tools at your disposal:
A company called StreetShares helps mostly veteran small business owners (also some non-veteran owned) acquire capital for their business cash flow needs by providing loans. What’s really cool is that these loans are funded by investors. For a $25 minimum investment, all U.S.-based investors can earn a flat yield of 5% on their money by investing in StreetShares Veteran Business Bonds.

When money is lent to a partnership or S-corporation acting as a pass-through entity (essentially a business that is designed to reduce the effects of double taxation) by that entity’s owner, the interest income on that loan to the portfolio income can qualify as passive income. As the IRS language reads: "Certain self-charged interest income or deductions may be treated as passive activity gross income or passive activity deductions if the loan proceeds are used in a passive activity."
You’ve probably heard of affiliate marketing before – it’s when you earn a commission by promoting a product. The product you promote online should be something you’re knowledgeable about and that you believe is high quality. Common sense, right? You’d be surprised by how many affiliate marketers forget that principle, but that’s a whole other story.
Residual income is calculated as net income less a charge for the cost of capital. The charge is known as the equity charge and is calculated as the value of equity capital multiplied by the cost of equity or the required rate of return on equity. Given the opportunity cost of equity, a company can have positive net income but negative residual income.
×