Which components constitute the cost of capital in a typical firm valuation framework?

Which components constitute the cost of capital in a typical firm valuation framework?

• A. Only cost of debt
• B. Cost of debt after tax and cost of equity via CAPM
• C. Cash flow to equity
• D. Cost of capital is the same as the risk-free rate

Answer: (B)

Cost of capital in a typical firm valuation reflects the return required by all providers of capital—debt and equity. The debt portion is taken as the after-tax cost because interest is tax-deductible, so it uses Rd × (1 − Tc). The equity portion is estimated with CAPM: Re = Rf + β × (Rm − Rf), which captures the extra return equity investors require for bearing systematic risk. These two components are then combined using the firm’s target capital structure to give the overall cost of capital (the WACC). Cash flow to equity is a type of cash flow, not the cost itself, and the cost of capital is not just the risk-free rate—it includes compensation for risk on both debt and equity, so it typically exceeds the risk-free rate.

Cost of capital in a typical firm valuation reflects the return required by all providers of capital—debt and equity. The debt portion is taken as the after-tax cost because interest is tax-deductible, so it uses Rd × (1 − Tc). The equity portion is estimated with CAPM: Re = Rf + β × (Rm − Rf), which captures the extra return equity investors require for bearing systematic risk. These two components are then combined using the firm’s target capital structure to give the overall cost of capital (the WACC). Cash flow to equity is a type of cash flow, not the cost itself, and the cost of capital is not just the risk-free rate—it includes compensation for risk on both debt and equity, so it typically exceeds the risk-free rate.