Cost of Equity Calculator
Enter your inputs below to calculate the cost of equity - the minimum return shareholders require for investing in a company. Choose between the Capital Asset Pricing Model (CAPM), the Dividend Discount Model (DDM), the Bond Yield plus Risk Premium approach, or a weighted blend of all three. The result updates as you type, with a full step-by-step breakdown of the calculation.
Formula
Worked example
CAPM example: risk-free rate 4.5%, beta 1.1, market return 9.5%. Equity risk premium = 9.5% - 4.5% = 5.0%. Beta contribution = 1.1 x 5.0% = 5.5%. Cost of equity = 4.5% + 5.5% = 10.0%. DDM example: D1 = $2.50, P0 = $50, g = 4.0%. Dividend yield = 2.50/50 = 5.0%. Cost of equity = 5.0% + 4.0% = 9.0%.
What is the cost of equity?
The cost of equity (Ke) is the return that equity investors require as compensation for the risk they take when they buy shares in a company. It is not a cash outflow the company pays directly the way it pays interest on debt. Instead, it is the opportunity cost of equity capital: if a company cannot earn at least this rate on its equity-funded projects, shareholders would be better off investing their money elsewhere. The cost of equity is a core input to the weighted average cost of capital (WACC) and to discounted cash flow (DCF) valuations, where it sets the minimum hurdle rate for equity-financed investment decisions.
The three main calculation methods
CAPM (Capital Asset Pricing Model) is the most widely used method. It says the cost of equity equals the risk-free rate plus beta multiplied by the equity risk premium. Beta measures how sensitive the stock is to broad market moves: a beta of 1.0 means the stock tracks the market exactly; above 1.0 means more volatile; below 1.0 means steadier. The equity risk premium is the excess return the market is expected to deliver above the risk-free rate, historically around 4-6% for the US equity market. The Dividend Discount Model (DDM or Gordon Growth Model) is simpler: cost of equity = (next dividend per share / current share price) + expected dividend growth rate. It only works for companies that pay a predictable and growing dividend, but it is intuitive and easy to cross-check against the stock price. The Bond Yield plus Risk Premium approach adds a firm-specific equity risk premium on top of the company's own corporate bond yield, making it useful when reliable beta estimates are hard to find but comparable bond yields are available.
How to use the weighted blend
No single method is always correct. CAPM depends on a reliable beta and a reasonable market return assumption. DDM requires dividends and a stable growth rate. The Bond + RP approach needs a comparable bond yield. Analysts often triangulate by running all three and weighting the results, with the heaviest weight given to the method whose assumptions they trust most for the specific company. For a large-cap dividend-paying utility, DDM and Bond + RP may deserve more weight. For a high-growth technology company that pays no dividend, CAPM is often the only viable option. Entering 50/30/20 weights (CAPM / DDM / Bond) is a common starting point. The three component estimates are shown separately so you can see where they agree and where they diverge.
Cost of equity in WACC and DCF analysis
Once you have the cost of equity, the next step for most corporate finance applications is to combine it with the after-tax cost of debt to get the WACC. The formula is: WACC = (E / V) x Ke + (D / V) x Kd x (1 - tax rate), where E is the market value of equity, D is the market value of debt, V is the total firm value, and Kd is the pre-tax cost of debt. In a DCF model, WACC is used to discount future free cash flows to the firm. In an equity DCF, the cost of equity alone discounts free cash flows to equity. A 1 percentage point change in the discount rate can shift a DCF valuation by 10-20% for a long-duration asset, so getting this number right matters.
Typical cost of equity by sector
| Sector | Typical beta range | Approximate cost of equity | Risk level |
|---|---|---|---|
| Utilities | 0.3 - 0.7 | 5% - 8% | Low |
| Consumer staples | 0.5 - 0.9 | 6% - 9% | Low-moderate |
| Healthcare | 0.7 - 1.1 | 7% - 11% | Moderate |
| Industrials | 0.9 - 1.3 | 8% - 12% | Moderate |
| Technology (large cap) | 1.0 - 1.5 | 9% - 14% | Moderate-high |
| Financials | 0.8 - 1.4 | 8% - 13% | Moderate-high |
| Energy | 1.0 - 1.6 | 9% - 15% | High |
| Technology (small cap) | 1.3 - 2.0 | 11% - 18% | High |
| Biotech / early stage | 1.5 - 3.0 | 13% - 25%+ | Very high |
Representative ranges based on historical equity risk premiums and sector betas. Actual values depend on market conditions, company size, and financial leverage.
Frequently asked questions
What is a good cost of equity?
It depends entirely on the industry and risk profile. Utilities and consumer staples companies with stable cash flows often have a cost of equity of 6-9%. High-growth technology and biotech firms with more volatile cash flows may see 12-20% or higher. The "right" number is not low or high in absolute terms - it is whatever reflects the actual risk investors bear. A cost of equity that is too low will lead to accepting projects that destroy shareholder value; one that is too high will lead to rejecting value-creating investments.
What risk-free rate should I use?
Use the yield on a long-term government bond in the currency matching your cash flows - typically the 10-year Treasury yield for US dollar valuations, or the equivalent gilt or bund for GBP or EUR valuations. Avoid short-term rates such as T-bills because they do not reflect the duration risk of equity. As of mid-2026, the US 10-year Treasury yield is approximately 4.2-4.7%, a significant increase from the near-zero rates of 2020-2021.
Where do I find beta?
Beta is published on most financial data platforms including Yahoo Finance, Bloomberg, and Reuters. It is usually the 5-year monthly regression beta against the relevant broad index (e.g. S&P 500). For private companies, you can use the beta of a comparable public peer or an industry average beta, then re-lever it for the target company's own financial leverage using the Hamada equation: levered beta = unlevered beta x (1 + (1 - tax rate) x (D/E)).
What equity risk premium should I use?
The equity risk premium (ERP) is the expected excess return of stocks over the risk-free rate. Long-run historical ERPs for the US market are around 4-6% depending on the time period and measurement method. Aswath Damodaran of NYU publishes widely used implied ERP estimates based on current market prices; as of early 2026 his implied US ERP was approximately 4.5-5%. Many practitioners use 5% as a default for US equities, adjusting upward for smaller or riskier markets.
Can the cost of equity be negative?
In theory, if a stock has a sufficiently negative beta (meaning it tends to rise when the market falls - like some gold miners or volatility ETFs), CAPM could produce a cost of equity below the risk-free rate. In practice, a negative cost of equity for an operating company is unusual and should prompt a check of your beta source. Negative-beta stocks act as a hedge, so investors may accept a lower return, but most equity investors demand at least the risk-free rate as a floor.
How does cost of equity differ from cost of capital?
Cost of equity (Ke) is the return required only by equity investors. Cost of capital (WACC) blends the cost of equity and the after-tax cost of debt, weighted by the proportions of each in the capital structure. Because debt interest is tax-deductible, the after-tax cost of debt is usually lower than the cost of equity, so WACC is typically below the cost of equity for a company that carries any debt. WACC is used to discount free cash flows to the entire firm; cost of equity is used to discount free cash flows to equity.