Weighted Average Cost of Capital kwAcc weighted average after-tax cost of capital ke risk-adjusted cost of equity k=before-tax cost of debt t marginal tax rate E market value of the firm's equity D market value of the firm's debt V total market value of the firm's securities =(D+E)Weighted Average Cost of Capital kWACC = weighted average after-tax cost of capital ke = risk-adjusted cost of equity kd = before-tax cost of debt t = marginal tax rate E = market value of the firm’s equity D = market value of the firm’s debt V = total market value of the firm’s securities =(D+E)