Not only that but in almost all other cases there is the illusion of influence, which is itself a psychological and emotional cost. If you invest in a business that your friend or family member is running, you can see how things can get messy. You have thoughts on how things should be done, they have competing thoughts, if things aren't going well… we know how this story goes.
Whether you know how to flawlessly apply eye makeup or build a wooden shelving unit, you can create an online course or video for others to follow. Websites like Udemy and Teachable allow you to build a course, such as how to learn a new language or write a cover letter. Once you build your course and set the price, there’s little work to be done. You’ll receive residual income from each person who signs up to take your course.
The idea of the circular flow was already present in the work of Richard Cantillon.[2] François Quesnay developed and visualized this concept in the so-called Tableau économique.[3] Important developments of Quesnay's tableau were Karl Marx' reproduction schemes in the second volume of Capital: Critique of Political Economy, and John Maynard Keynes' General Theory of Employment, Interest and Money. Richard Stone further developed the concept for the United Nations (UN) and the Organisation for Economic Co-operation and Development to the system, which is now used internationally.
When most hear the term residual income, they think of excess cash or disposable income. Although that definition is correct in the scope of personal finance, in terms of equity valuation residual income is the income generated by a firm after accounting for the true cost of its capital. You might be asking, "but don't companies already account for their cost of capital in their interest expense?" Yes and no. Interest expense on the income statement only accounts for a firm's cost of its debt, ignoring its cost of equity, such as dividends payouts and other equity costs. Looking at the cost of equity another way, think of it as the shareholders' opportunity cost, or the required rate of return. The residual income model attempts to adjust a firm's future earnings estimates, to compensate for the equity cost and place a more accurate value to a firm. Although the return to equity holders is not a legal requirement like the return to bondholders, in order to attract investors firms must compensate them for the investment risk exposure.
I wouldn't think of a high yield savings account as a source of passive income but your savings should be getting something (less like Seinfeld syndication residuals and more like a commercial jingle residuals!). It won't make you rich but it's nice if your baseline, risk-free rate of return on cash is 1% or more. The best high yield savings accounts (or money market accounts) offer higher interest rate and there is absolutely no risk. CIT Bank currently leads the pack with the highest interest rate.
With sites like Wrapify and StickerRide, you can earn hundreds of dollars each month by simply driving around town. You’ll need to place an advertisement on your car and drive a certain number of miles every month. If you’re already on the road for work, travel, or school, advertising allows you to make extra cash without any extra time commitment.
Nice update. It’s great to see a FIRE blogger that actually uses risk management and true diversification in his portfolio, as opposed to the bogelhead 3 and boilerplate bla bla bla. It’s also nice to see someone who doesn’t have to make “all the money” as opposed to enough money. The point of buying stocks bonds debt real estate (and yes commodities) is to buy the security they provide and understand the security they provide. Security is defined as “freedom from danger”. You buy security with money but you become secure by controlling risk. Maybe at some point you could write something from the point of view of risk management as opposed to overpaying for alpha with undue risk as the currency.
Making money in addition to a regular income can have a big impact on your finances. An extra $500 per month could go a long way in paying down debt or raising your investment. Diversifying your income streams is important, especially as wage remain stagnant. You decide how you want to produce the income. Either you ‘do something’ to generate the income- this is active income such as providing a service; or the income is generated without you having to ‘do anything,’ – this is passive income such as hosting an Airbnb. Just make sure you do not place all your eggs in one basket.
Loss of your job as a physician often means an expensive relocation to another city due to non-compete agreements.  It may also mean 6 months without income as you get a medical license, a DEA license, and/or go through the credentialing/privileging process.  You may have to sell your house at a loss or even liquidate investments in a down market to tide you over through a period of lost income.  Because of this, employers have an advantage over you in negotiations.  But if you have multiple streams of income, you don’t have to play by their rules and you retain negotiating advantage.  This is your F-You money because it allows you to say “F-You” to the employer and walk away from the job.  You know there will still be money coming in every month even without your main job.
Not only that but in almost all other cases there is the illusion of influence, which is itself a psychological and emotional cost. If you invest in a business that your friend or family member is running, you can see how things can get messy. You have thoughts on how things should be done, they have competing thoughts, if things aren't going well… we know how this story goes.

Now, all that said, if capital (savings) grows faster than the growth of the economy, those with savings will see their wealth grow at a faster rate than those who rely on the growth of their income. While this is not an extension of Piketty's argument (you can't take an idea that applies to a population and a whole economy and boil it down to the individual like this), it's not an unreasonable conclusion to take and apply to your own life. (Piketty does talk about this on an individual level, but says it's more impactful for billionaires vs. millionaires – though we have limited data into individuals)

I own several rental properties in the mid west and I live in CA. I have never even seen them in person. With good property management in place (not easy to find but possible) it is definitely possible to own cash flowing properties across the country. Not for everyone and not without it’s drawbacks, but it seems to be working for me so far. I’m happy to answer any questions about my experience with this type of investing.
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.
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