In capital budgeting, what does the Weighted Average Cost of Capital (WACC) represent and how is it used?

In capital budgeting, what does the Weighted Average Cost of Capital (WACC) represent and how is it used?

• A. The weighted average after-tax cost of debt and equity used as the discount rate to evaluate investment projects.
• B. A method to project cash flows using depreciation schedules.
• C. The maximum tax shield available for a project.
• D. A measure of market risk of the project.

Answer: (A)

WACC is the discount rate used to decide whether a project adds value by reflecting the firm’s overall cost of financing. It combines the cost of equity and the after‑tax cost of debt, weighted by how much each source funds the company (V = equity + debt). The formula is: WACC = (E/V) × cost of equity + (D/V) × (cost of debt × (1 − tax rate)). This rate represents the minimum return required by investors given the firm’s mix of financing and the tax shield from debt. In capital budgeting, you discount the project’s cash flows at WACC to calculate NPV; if the NPV is positive, the project should be value-adding because it earns at least the required return. WACC also assumes the project would be financed with the same proportions as the firm and may not capture project-specific risk, in which case a higher or adjusted rate might be used.

WACC is the discount rate used to decide whether a project adds value by reflecting the firm’s overall cost of financing. It combines the cost of equity and the after‑tax cost of debt, weighted by how much each source funds the company (V = equity + debt). The formula is: WACC = (E/V) × cost of equity + (D/V) × (cost of debt × (1 − tax rate)). This rate represents the minimum return required by investors given the firm’s mix of financing and the tax shield from debt. In capital budgeting, you discount the project’s cash flows at WACC to calculate NPV; if the NPV is positive, the project should be value-adding because it earns at least the required return. WACC also assumes the project would be financed with the same proportions as the firm and may not capture project-specific risk, in which case a higher or adjusted rate might be used.