Cost of Equity Calculator

The cost of equity calculator estimates the return shareholders require for owning common stock. It supports two methods that match the form’s compute logic exactly. If Company pays a dividend is switched on, the calculator uses the dividend growth model: dividend per share divided by current share price, plus dividend growth rate. If the switch is off, it uses CAPM: risk-free rate plus beta times the market return minus the risk-free rate.

That difference makes this page distinct from the broader cost of capital calculator. Cost of equity is only the shareholder side of the financing mix. It becomes an input to WACC, a benchmark for equity-financed projects, and a discount rate for cash flows that belong only to common shareholders. For a focused market-risk version, compare the result with the CAPM calculator. For debt-side analysis, use the after-tax cost of debt calculator.

Choosing the method

Use the dividend model when dividends are recurring, economically meaningful, and likely to grow at a steady rate. The model is easy to audit because its pieces are visible: cash dividend, share price, and growth. It is also fragile. A dividend that is temporarily high, temporarily low, or not representative of future policy can distort the required return. The growth input should represent a long-run sustainable rate, not a one-year jump after a weak period.

Use CAPM when the stock’s market risk is the better anchor. CAPM starts with a risk-free rate, measures the extra return expected from the equity market, and scales that premium by beta. A beta of 1.20 means the stock is assumed to carry 120% of the market premium. A beta of 0.80 means it carries 80% of that premium. CAPM is common in valuation and corporate finance because it can be applied to companies that do not pay dividends, but it depends heavily on the market return and beta assumptions.

Formulas used by this calculator

When the dividend switch is on:

$\text{dividend yield} = \frac{\text{dividend per share}}{\text{current share price}} \times 100$

$\text{cost of equity} = \text{dividend yield} + \text{dividend growth rate}$

When the dividend switch is off:

$\text{market risk premium} = \text{market return} - \text{risk-free rate}$

$\text{cost of equity} = \text{risk-free rate} + \beta \times \text{market risk premium}$

The calculator expects percentage inputs as percentage points. Enter 9 for 9%, not 0.09. The displayed dividend yield and beta-adjusted premium are also shown as percentage points.

Examples: calculating cost of equity

For the dividend model, suppose the company pays a $2.00 dividend per share, the current share price is $70.00, and dividend growth is 3.00%. The calculator first converts the dividend into a yield:

$\text{dividend yield} = \frac{\$2.00}{\$70.00} \times 100 = 2.8571\%$

Then it adds the growth rate:

$\text{cost of equity} = 2.8571\% + 3.00\% = 5.8571\%$

Rounded for display, the primary result is 5.86%. The supporting rows show dividend yield at 2.86%, dividend growth rate at 3.00%, and share price used at $70.00.

For CAPM, suppose the risk-free rate is 4.00%, beta is 1.20, and the expected market return is 9.00%. The market risk premium is:

$\text{market risk premium} = 9.00\% - 4.00\% = 5.00\%$

The beta-adjusted premium is:

$\text{beta-adjusted premium} = 1.20 \times 5.00\% = 6.00\%$

The final CAPM cost of equity is:

$\text{cost of equity} = 4.00\% + 6.00\% = 10.00\%$

That result is higher than the dividend-model example because the assumptions describe different companies and risk profiles. The calculator does not decide which method is “right”; it applies the method implied by the switch.

Role in valuation and capital budgeting

Cost of equity is central when the cash flows belong to shareholders after interest, debt repayment, and preferred claims. Equity analysts use it to discount dividends, free cash flow to equity, or residual income. Corporate finance teams use it as the equity component in WACC and as a hurdle for projects funded by retained earnings or new shares. Investors use it to test whether a promised growth story offers enough expected return for the risk taken.

The input discipline matters more than the formula length. A risk-free rate should match the currency and horizon of the cash flows. A market return should be consistent with the equity-risk-premium view you are using. Beta should be reasonable for the business mix and leverage. For dividend models, growth should not exceed what the company’s reinvestment opportunities and payout policy can plausibly support over the long run. If the result drives a valuation, run sensitivities instead of relying on a single point estimate.

Common caveats

• CAPM assumes beta captures the relevant systematic risk; company-specific risks may require separate analysis.
• Dividend growth models can understate required return when dividends are temporarily suppressed or overstate it when dividends are unusually high.
• A negative market risk premium is possible if the expected market return is below the risk-free rate, but it deserves careful review.
• Private-company estimates often require peer betas, leverage adjustments, and size or country-risk considerations.
• Cost of equity is an estimate of required return, not a guarantee that shareholders will earn that return.

Sources

• CFI, Cost of Equity — CAPM and dividend capitalization approaches.
• NYU Stern, Damodaran, Country Default Spreads and Risk Premiums — equity risk premium reference data.
• Wall Street Prep, Cost of Equity — cost of equity training reference.