The U.S. Internal Revenue Service categorizes income into three broad types, active income, passive income, and portfolio income.[1] It defines passive income as only coming from two sources: 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 could be a better option than to make money out of your hobby? If you’re a hobbyist who creates some sort of artwork such as sketches, doodles, paintings, etc., you can put these up on a portfolio website with your name as the domain name and sell them. You would need to frame the artwork, but do it only when you receive an order. You can easily build a portfolio website with Pixpa and sell your artwork right from there.

To create residual income, you need to create something that people will continue to buy on a regular basis long after you’ve created it. A house is a prime example of this as people will continue to pay rent for the right to live in the house. A business needs to have products that are sold over and over again rather than trading the business owner’s time for money.
This may be a method that is unusual. Drive traffic to your lens the same as you would your blog. Link to your lens on social media platforms, like Twitter. The more people that know about the lens, the more that are apt to visit and purchase. The lens can also be used to promote products on e-bay or CafePress. Write a short description of the product and its unique uses and sell away.
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.