The first form of residual income, the leftover cash after bills and expenses are paid, is important when a person is growing their savings account or is seeking a loan or financing. When getting a loan, there must be an adequate amount of residual income available to ensure a person has the money to make the loan payments each month. If there is not adequate residual income, financing or loans will not likely be approved.
What if the manager of the Idaho investment center wants to invest $100,000 in new equipment that will generate a return of $16,000 per year? This would provide residual income of $4,000, which is the amount by which it exceeds the minimum 12% rate of return threshold. This would be acceptable to management, since the focus is on generating an incremental amount of cash.
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.