Structure your partnership. Limited partnerships can only be created by filling out official documents with your state. In many cases, you'll have to draw up a formal partnership agreement that determines each partner's rights, responsibilities, and percentage ownership, among other important details. Even if you are not required to do this, you should anyway to avoid any conflicts in the future. As usual, always discuss this contract with a lawyer before signing it to make sure that you are being treated fairly in the agreement.
The United States Internal Revenue Service categorizes income as active income, passive income, or portfolio income. 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." 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 means passive income?