Cost Of Capital Calculatorv1.0.0

Weighted average cost of capital (WACC) blends the after-tax cost of debt with the cost of equity, weighted by each component's share of total firm value. Enter the dollar amounts and percentage rates below to obtain a WACC figure along with the full formula substitution.

• Enter the Market Value of Equity in dollars. Accept whole numbers, decimals, or values with commas and dollar signs (for example, $1,500,000 or 1500000).
• Enter the Market Value of Debt in the same format. The calculator derives the equity weight E / (E + D) and the debt weight D / (E + D) from these two figures.
• Enter the Cost of Equity as a percentage. If the exact rate is unknown, open Settings and check Derive Cost of Equity from CAPM. Fill in the Risk-Free Rate, Equity Beta, and Expected Market Return fields. The calculator applies the Capital Asset Pricing Model formula: Re = Rf + Beta x (Rm - Rf).
• Enter the Cost of Debt as a percentage. This is the effective interest rate the firm pays on its borrowings before any tax deduction.
• Enter the Corporate Tax Rate as a percentage. The calculator multiplies the cost of debt by (1 - Tax Rate) to reflect the tax shield on interest payments.
• Press Calculate or wait for automatic calculation after a brief pause. Results appear below the form, showing WACC, the equity and debt weights, and the after-tax cost of debt.
• Check Show step-by-step derivation inside Settings to display the symbolic WACC formula with substituted values and intermediate computations.
• Press Reset to clear all inputs and saved state, returning every field to its default.
• All inputs support fractions (3/4), mixed numbers (1 1/2), and scientific notation (1.5e3).

WACC serves as the discount rate for net present value analysis, project evaluation, and enterprise valuation. Below are scenarios where a rapid WACC computation adds direct value.

• Capital budgeting: Discount projected free cash flows at the firm's WACC to determine whether a proposed factory expansion, product launch, or acquisition meets the required return threshold.
• Equity research: Plug WACC into a discounted cash flow model to arrive at an intrinsic share price estimate, comparing it against the current trading price to identify potential mispricings.
• Debt restructuring: Adjust the market value of debt and the cost of debt fields to model how refinancing at a lower interest rate or extending maturity changes the overall cost of capital.
• Leveraged buyout analysis: Model the capital structure at various debt-to-equity ratios to find the leverage level that minimizes WACC without pushing the cost of debt into distress territory.
• Startup fundraising: Estimate cost of equity through CAPM by entering a sector beta and the current risk-free rate, then combine it with anticipated debt terms to present investors with a credible hurdle rate.
• Academic coursework: Walk through WACC derivations step by step using the formula display toggle, reinforcing the relationship between capital weights, tax shields, and component costs.
• Annual planning: Recalculate WACC each fiscal year as market conditions shift, using updated equity valuations, prevailing interest rates, and revised tax legislation to keep investment thresholds current.
• Merger target screening: Compare the acquirer's WACC against the target's implied return on invested capital to determine whether the acquisition creates or destroys shareholder value at the proposed purchase price.

This tool is intended for informational and educational purposes only. It does not provide financial, investment, or tax advice. The amounts and payments shown are estimates and may not reflect actual figures. Results are not guaranteed and may vary based on individual circumstances. Always consult a qualified financial advisor before making any financial decisions.