However, residual income typically has an expiration date, especially if it is being earned through a business. Effort must be continuously put into the business in order for someone to continue to receive residual income. Businesses must continue to market themselves in order to remain relevant. The best way to look at residual income in this sense is that it is a part-time job that earns full-time income.
Generating passive income does NOT happen overnight. I don’t live, teach, or believe in get-rich-quick schemes. My first online business took about a year of hard work before it was generating enough income to support my family. There was nothing easy about what I had to do to get that business going. But in relative terms, it was “quick” because I decided to opt-out of the work-till-sixty-five-deferred-life plan and make my own luck happen. You can do it too.

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.