Typically, the above formula will be applied such that the company is assumed to achieve maturity, or "constant growth". (Note that the value will remain identical: the adjustment is a "telescoping" device). Here, analysts commonly employ the Perpetuity Growth Model to calculate the corresponding terminal value[3] (although various, more formal approaches are also applied[4]). Then, assuming long-run, "constant", growth {\displaystyle g} from year {\displaystyle m} , the terminal value is

`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 equityÂ 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.`