Cost of Equity Calculator
Calculate cost of equity using CAPM or the Dividend Growth Model. Compare required-return estimates from beta, market risk, dividends, share price, and growth.
Educational estimate only. Cost of equity is an assumption-based valuation input, not a guaranteed investment return or personalized advice.
Estimated cost of equity
9.50%
4.00% + 1.10 × 5.00%
CAPM estimate
9.50%
Dividend-growth estimate
9.00%
Market risk premium
5.00%
Method difference
0.50%
Use cost of equity as a valuation discount-rate assumption only after checking the model, source data, currency, and long-term growth assumptions.
Cost-of-equity visualizer
Compare CAPM and dividend-model estimates, then see how dividend growth changes the Gordon Growth result.
Cost of Equity Calculator
This cost of equity calculator estimates the return shareholders may require for investing in a company. Choose the Capital Asset Pricing Model, or CAPM, when you have a risk-free rate, beta, and expected market return. Choose the Dividend Growth Model, also called the Gordon Growth Model, when you have an expected next dividend, current share price, and a sustainable long-term dividend-growth assumption. The page calculates both estimates for comparison.
Cost of equity is widely used in company valuation, discounted cash flow analysis, corporate finance, and investment research. It is a required-return assumption rather than a promise of actual returns. The estimate changes with interest rates, market conditions, business risk, leverage, dividend policy, valuation, and investor expectations. The most useful result is a transparent range supported by consistent assumptions.
How to Calculate Cost of Equity
The two common formulas are CAPM and the Dividend Growth Model. CAPM is cost of equity = risk-free rate + beta × (expected market return − risk-free rate). The dividend method is cost of equity = next annual dividend ÷ current share price + dividend growth rate. Both try to estimate a return required by equity investors, but they use different information and can produce different results.
For example, CAPM with a 4% risk-free rate, 1.1 beta, and 9% market return gives 4% + 1.1 × 5%, or 9.5%. The dividend method with a $2.50 next dividend, $50 share price, and 4% growth gives 2.50 ÷ 50 + 4%, or 9%. The difference is not necessarily an error; it reflects different assumptions and model limitations.
Cost of Equity Using CAPM
The CAPM method starts with a risk-free rate and adds compensation for market risk. Beta scales the market risk premium: a higher-beta company receives a larger premium, while a lower-beta company receives a smaller one. CAPM is especially useful for companies without a reliable dividend record, for broad-market analysis, and when analysts need a consistent framework across multiple companies.
CAPM inputs require judgment. A government yield may be used as a risk-free proxy, but duration and currency should match the analysis. Beta depends on benchmark, time horizon, return frequency, and data source. Market risk premium may be historical, implied, or forward-looking. Keep the inputs internally consistent and test reasonable alternatives instead of relying on a single published number.
Cost of Equity Using Dividend Growth Model
The Dividend Growth Model estimates required return from dividend yield plus long-term dividend growth. It is most appropriate for mature, dividend-paying businesses with a credible record of stable distributions and a sustainable growth outlook. The model is simple and directly connects current valuation, expected cash income, and growth assumptions.
The model becomes unreliable when dividends are irregular, zero, temporarily distorted, or expected to grow at an unstable rate. Long-term growth should normally be economically plausible and below the company’s cost of equity. A small change in dividend or growth can materially change the result, especially for a high-yield company. Use a range and inspect the business’s payout ratio, earnings, cash flow, and capital needs.
CAPM vs Dividend Growth Model
CAPM and the dividend model answer a similar question using different lenses. CAPM focuses on market sensitivity and risk premium; the dividend method focuses on income yield and growth. A company with no dividend cannot be evaluated by a simple dividend-growth model, while a company with an unstable beta may make CAPM less certain. Comparing both can reveal where assumptions need closer review.
Neither method is automatically superior. Analysts may prefer CAPM for a non-dividend-paying growth company and dividend growth for a stable utility or consumer business. Some valuations triangulate between methods, use a weighted range, or add other approaches. The goal is not to force identical outputs but to understand the drivers of each result and choose a defensible discount-rate range.
Risk-Free Rate and Market Risk Premium
The risk-free rate is the base return in CAPM. It is usually represented by a high-quality government security yield in the same currency as the valuation. The market risk premium is expected market return minus the risk-free rate. Together, they form the market compensation for risk before beta adjusts it for a particular stock.
Interest rates and equity-risk-premium assumptions change over time. A valuation built with old interest-rate data may produce an outdated cost of equity. Record the source, date, currency, and horizon used for each input. When uncertainty is high, show low, base, and high assumptions. Sensitivity analysis is more honest than pretending a long-term market premium is known to two decimal places.
Beta and Cost of Equity
Beta is a historical estimate of how a stock has moved relative to a market benchmark. In CAPM, beta multiplies the market risk premium. With a 5% premium, beta 0.7 adds 3.5 percentage points, beta 1 adds 5 points, and beta 1.4 adds 7 points. Beta therefore has a direct and often material effect on cost of equity.
Beta can change when a company changes debt levels, business mix, geographic exposure, product concentration, or investor perception. It also varies with the chosen market index and sample period. For private companies, analysts may use comparable-company betas and adjust for leverage, but this adds another layer of assumptions. Test beta ranges and document why the selected value is reasonable.
Dividend Yield and Long-Term Growth
Dividend yield in the Gordon Growth Model is next expected annual dividend divided by current share price. Use the forward dividend rather than a trailing payment if a change is known or expected. Growth should represent a sustainable long-term rate, not an unusually strong one-year forecast. A company cannot generally grow dividends faster than the economy forever without eventually becoming implausibly large.
Review dividend safety before using the model. Earnings, free cash flow, payout ratio, debt, capital expenditure, and management policy all affect whether dividends can grow. A high dividend yield can signal opportunity, but it can also reflect a falling share price and concern about a dividend cut. The model converts assumptions into a rate; it does not validate the assumptions for you.
Cost of Equity in DCF and WACC
Cost of equity is a key input in discounted cash flow valuation. It is often combined with after-tax cost of debt according to capital structure to calculate weighted average cost of capital, or WACC. A higher cost of equity raises the discount rate and lowers the present value of future cash flows. A lower rate has the opposite effect, which is why careful assumptions matter.
Use the discount rate that matches the cash flows being valued. Currency, inflation, leverage, and business risk should be consistent across the forecast and discount rate. A cost of equity estimate is not automatically appropriate for every project or division. Risk can vary within a company, and debt structure can change over time. Sensitivity tables are essential for decision-quality DCF work.
Common Cost of Equity Mistakes
Common mistakes include using the wrong dividend, mixing percentages and decimals, applying an unsustainable growth rate, using beta from an unrelated benchmark, and treating a model output as fact. Another frequent error is comparing cost of equity with a pre-tax debt rate or discounting cash flows in one currency with a rate from another currency.
Avoid false precision. A calculated 9.47% can look authoritative while resting on uncertain beta, premium, dividend, and growth assumptions. Round appropriately, show a range, and explain the sources. Update calculations when interest rates, company strategy, debt, dividends, or market conditions change materially. Transparent judgment is more valuable than a narrow but unsupported number.
Cost of Equity Calculator FAQ and Disclaimer
What is cost of equity? It is the return equity investors may require for investing in a company. What is the CAPM formula? Risk-free rate plus beta times market risk premium. What is the dividend growth formula? Next dividend divided by price plus growth. Is cost of equity the same as expected stock return? It is a model-based required-return estimate, not a guaranteed realized return.
This free cost of equity calculator is for educational research only and is not investment, financial, tax, accounting, or legal advice. CAPM and dividend-growth estimates depend on uncertain assumptions and do not predict future stock performance. Investments can lose value. Verify data and consult qualified professionals before making investment or valuation decisions.
Frequently Asked Questions
How do you calculate cost of equity?
Use CAPM: risk-free rate plus beta times market risk premium, or dividend yield plus growth for the Dividend Growth Model.
What is cost of equity in CAPM?
It is the expected or required return estimated from risk-free rate, beta, and market risk premium.
Can I use the dividend model for any stock?
It works best for companies with reliable, sustainable dividends and a defensible long-term growth assumption.
Is cost of equity a guaranteed return?
No. It is an assumption-based valuation estimate, not a forecast or guarantee.