Residual income has two real definitions. Let’s look at those first. Residual Income is income that continues to be generated after the initial effort has been expended. Compare this to what most people focus on earning: linear income, which is “one-shot” compensation or payment in the form of a fee, wage, commission or salary. The other definition for residual income is not actually a type of income, but rather a calculation that determines how much discretionary money an individual has available to spend after most monthly bills are paid. We believe that income that exceeds your expenses is called PROFIT! So, we are going to use the first definition for the sake of this document.
ie first you need to haul ass and do something crazy, eg write a quality 20,000 word ebook (insanely not passive hahahah), but then you get to sit back and enjoy seeing PayPal sale messages pop up on your iPhone each morning as sale after sale after sale is made…on an ongoing basis and without any additional work. That’s some seriously Pina Colada flavored passive goodness!
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.
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.