Cost of Capital Calculator
Calculate your company's cost of equity and cost of debt separately to understand the minimum return required to justify investment decisions.
Results
Enter values and click Calculate to see results
How to Calculate Cost of Capital
Enter Market Data
Input risk-free rate, market return expectation, and your stock's beta coefficient.
Add Debt Information
Enter your company's debt interest rate and corporate tax rate for after-tax calculations.
Get Cost Analysis
See cost of equity (CAPM), cost of debt, and after-tax cost of debt for investment decisions.
Why Calculate Cost of Capital?
๐ Investment Decision Making
Compare project returns against cost of capital to determine if investments create shareholder value.
๐ฐ CAPM Formula Applied
Uses the Capital Asset Pricing Model to calculate cost of equity based on systematic risk (beta).
๐ฆ Debt Tax Shield
Calculates after-tax cost of debt, showing the tax advantage of debt financing.
๐ WACC Foundation
Provides the component costs needed to calculate Weighted Average Cost of Capital (WACC).
Cost of Capital Components Reference
| Component | Formula | Typical Range | Use Case |
|---|---|---|---|
| Risk-Free Rate | Treasury yield | 2-5% | Baseline return expectation |
| Cost of Equity (CAPM) | Rf + ฮฒ(Rm - Rf) | 8-15% | Equity investment hurdle rate |
| Cost of Debt | Interest rate on debt | 4-10% | Debt financing cost |
| After-Tax Cost of Debt | Rd ร (1 - Tax Rate) | 3-7% | WACC calculation |
Cost of Capital FAQs
What is the cost of capital?
Cost of capital is the minimum return a company must earn on investments to satisfy investors and creditors. It's the opportunity cost of using capital.
How is cost of equity calculated using CAPM?
CAPM formula: Cost of Equity = Risk-Free Rate + Beta ร (Market Return - Risk-Free Rate). This accounts for systematic risk via beta.
Why is after-tax cost of debt lower?
Interest payments are tax-deductible, creating a "tax shield." After-tax cost = Pre-tax cost ร (1 - Tax Rate), reducing the effective cost.
What is a good cost of equity?
Typical cost of equity ranges from 8-15% depending on risk. Higher beta (riskier stocks) have higher cost of equity expectations.
How do I use cost of capital for investment decisions?
Compare project IRR to cost of capital. If IRR > cost of capital, the project creates value. Use WACC as the hurdle rate for NPV calculations.
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