What is WACC (Weighted Average Cost of Capital)?
The Weighted Average Cost of Capital (WACC) is the average rate of return a company is expected to pay to all of its security holders โ including equity investors and debt holders โ to finance its assets. WACC represents the minimum return a company must earn on its existing asset base to satisfy its creditors, owners, and other providers of capital.
WACC is one of the most widely used metrics in corporate finance, investment banking, and business valuation. It serves as the discount rate in Discounted Cash Flow (DCF) models, the hurdle rate for capital budgeting decisions, and a key benchmark for assessing whether a company is creating or destroying shareholder value.
Understanding the WACC Formula
The standard WACC formula accounts for two primary sources of capital โ equity and debt โ and weights each by its proportion of total capital:
WACC = (E/V ร Re) + (D/V ร Rd ร (1 โ Tc))
The key insight is the tax shield on debt. The term (1 โ Tc) accounts for the fact that interest payments on debt are tax-deductible, making debt a cheaper source of financing than equity on an after-tax basis.
Components of WACC
- Cost of Equity (Re): The return expected by equity investors. Commonly estimated using CAPM: Re = Rf + ฮฒ(Rm โ Rf).
- Cost of Debt (Rd): The effective interest rate the company pays on all outstanding debt.
- Corporate Tax Rate (Tc): In the United States, the federal corporate tax rate is 21%. State taxes may add 4โ10%.
- Capital Weights (E/V and D/V): The proportions of equity and debt in the total capital structure, ideally at market values.
WACC for US Companies: Key Benchmarks
For US companies, the typical WACC varies by industry. Technology companies often see WACC between 8โ12%. Utilities typically have WACC in the 5โ8% range. Financial services: 8โ10%. Retail: 7โ10%. The US federal corporate tax rate of 21% is pre-filled in our calculator for convenience.