In Multiple Streams of Income, bestselling author Robert Allen presents ten revolutionary new methods for generating over $100,000 a year—on a part-time basis, working from your home, using little or none of your own money. For this book, Allen researched hundreds of income-producing opportunities and narrowed them down to ten surefire moneymakers anyone can profit from. This revised edition includes a new chapter on a cutting-edge investing technique.

Roofstock – Investing in rental properties is one of those passive income ideas that can be extremely intimidating, especially when it comes to finding tenants. Roofstock lets you buy properties with as little as 20% down that already have tenants living in them. That means you start getting paid from the first day of your investment. You don’t even have to physically visit the properties!
Managerial accounting defines residual income in a corporate setting as the amount of leftover operating profit after all costs of capital used to generate the revenues have been paid. It is also considered the company's net operating income or the amount of profit that exceed its required rate of return. Residual income is normally used to assess the performance of a capital investment, team, department or business unit.