7. Royalties: the creation of music, books, inventions, machines, patents. A royalty is something you have sold or created and put it on a platform that you do not run and then receive compensation based on when the item is purchased or used. Most of us do not have the potential to quickly create royalty streams. Not to say you couldn’t specialize in something and write an ebook or if you are musically inclined you couldn’t write a song, but to create true residual income, that is going to take a lot of effort and skill. This is the purest form of passive residual income, if you can achieve it.
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.