Opportunity cost is the basic concept at the heart of residual income. Opportunity cost refers to what you are giving up to use an asset for a particular project or investment. Let's say you start with $100,000 cash in your stock portfolio and grew that money to $104,000 by spending only a few hours per month trading stocks. Now $4,000 in profit may look just fine when you consider that you only worked, say, 20 hours for it in total. However, once you consider your opportunity cost, your little hobby will not look nearly as profitable. If banks are paying six percent for risk-free certificates of deposit, your $100,000 would have grown to $106,000 simply by depositing it in a bank. Your opportunity cost is $6,000
When I purchase an existing online business, I look for cash flow over the past year and where the money comes from. I want the sources to be more passive so that it does not take a lot of my time. Also, typically I will make an offer that is 18 – 24 months of profit so that I know that I will get my money back within the next two years. I hope that helps!
The biggest surprise is real estate being second to last on my Passive Income Ranking List because I’ve written that real estate is my favorite investment class to build wealth. Physical real estate doesn’t stack up well against the other passive income sources due to the lack of liquidity and constant maintenance of tenants and property. The returns can be huge due to rising rental income AND principal over time, much like dividend investing. If you are a “proactive passive income earner” like myself, then real estate is great.
Residual income is the amount of net income generated in excess of the minimum rate of return. Residual income concepts have been used in a number of contexts, including as a measurement of internal corporate performance whereby a company's management team evaluates the return generated relative to the company's minimum required return. Alternatively, in personal finance, residual income is the level of income that an individual has after the deduction of all personal debts and expenses have been paid.