The United States Internal Revenue Service categorizes income as active income, passive income, or portfolio income.[1] It defines passive income as only coming from two sources, or "passive activities": rental activity or "trade or business activities in which you do not materially participate."[2][3] Other financial and government institutions also recognize it as an income obtained as a result of capital growth or in relation to negative gearing. Passive income is usually taxable.

What is the best passive income?

I have six rental units which are a good source of passive income. I don’t use a property manager because you are right…they take about 10% of your rent. There are really only 2 things that tenants call about: 1. A plumbing issue 2. Heat/Air problems. Just find a plumber and heat/air guy you can trust. I travel a lot for my primary job. When a call comes in from a tenant, I can call the repair guy in just as easy as a property manager.
Ebooks are one of my favorite sources of passive income. Now, you can do this the simple way and just publish it on Amazon's KDP. Or, you can go all out and build yourself a book funnel. Book funnels are powerful, but they won't be fully passive. For example, if you do a free-plus-shipping offer for your ebook (converting it into a physical book), you'll need to create some one-time offers (i.e. extra training) and up-sells (i.e. an audiobook). But, a book funnel can be very powerful.
The first passive income idea on this list does take some start-up cash, but it absolutely helps me earn more than $1,000 per month. Dividend-paying stocks, ETFs, and other investments like Fundrise and Lending Club are helping me earn money around the clock – and all with no work on my part. While the amounts I have invested in these accounts vary, they’re all paying me more than $1,000 per month.

Decide to invest in dividend stocks. Dividend stocks pay out a portion of the company's profits to shareholders. These dividends are paid at regular intervals, so they produce a regular income stream. Investors who hold a large amount of this type of stock are known as "income investors" because they prioritize regular dividends over stock value growth.[1]

How do I generate passive income?