The internal rate of return, r, can be derived from NOPAT and capital: r = NOPAT/capital. The cost of capital, c*, can be measured by the weighted average cost of capital. The weighted average cost of capital consists of the cost of equity and the cost of debt.18 At this point a circularity problem arises: The given mix of equity and debt affects the cost of capital and
simultaneously must be set before the calculation. Then EVA can be calculated with two different equations: