Capital Structure Inputs
Cost of Capital Results
A Weighted Average Cost of Capital (WACC) calculator is a vital financial modeling tool used by investors, analysts, and business owners to determine the minimum acceptable rate of return for a company. It calculates the average rate a business pays to finance its assets, factoring in the proportional weight of both its debt and equity.
How to Calculate WACC
The WACC formula balances the cost of equity (money from shareholders) and the cost of debt (money from lenders), taking into account the corporate tax shield provided by debt interest payments.
WACC = (E/V * Re) + [D/V * Rd * (1 - Tc)]
Where E is the market value of equity, D is the market value of debt, V is the total market value (E + D), Re is the cost of equity, Rd is the cost of debt, and Tc is the corporate tax rate. By multiplying each cost component by its proportional weight and adding them together, you arrive at the blended cost of capital.
How to Use This Tool
- Enter the current Market Value of Equity, often found by multiplying total outstanding shares by the current stock price.
- Input the Cost of Equity. This is usually estimated using the Capital Asset Pricing Model (CAPM).
- Enter the Market Value of Debt, which includes the total outstanding long-term and short-term debt of the company.
- Input the Cost of Debt, which represents the effective interest rate the company pays on its borrowed funds.
- Provide the Corporate Tax Rate, as interest payments on debt are generally tax-deductible.
- The tool instantly calculates the total WACC percentage and the individual capital weights.
Frequently Asked Questions
Why is the corporate tax rate included in WACC?
In most tax jurisdictions, the interest payments a company makes on its debt can be deducted from its taxable income. This creates a "tax shield" that effectively lowers the true cost of borrowing. The formula accounts for this by multiplying the cost of debt by (1 - Tax Rate).
What is considered a good WACC?
There is no universal "good" WACC, as it varies heavily by industry. A lower WACC indicates that a company can fund its operations and new projects cheaply, which generally leads to higher valuations. If a company's return on invested capital (ROIC) exceeds its WACC, it is successfully creating value for its shareholders.
Why is WACC important for valuation?
WACC is heavily used as the discount rate in Discounted Cash Flow (DCF) analysis. Analysts use WACC to discount a company's projected future cash flows back to their present value. If the WACC is calculated incorrectly, the entire business valuation will be flawed.