Cost of Equity Calculator
Three methods, one triangulated answer.
Dividend Discount Model
CAPM
Bond Yield Plus Premium
Average cost of equity (3 methods)
Estimates for planning only, not financial advice.
Cost of equity is what shareholders demand for their risk, and since no market quotes it, you estimate it three ways and triangulate. The dividend model gives $2.20/$50 + 5% = 9.4%. CAPM with a 4% risk-free rate, 1.1 beta, and 10% market return gives 10.6%. Bond yield plus premium at 6% + 4% gives 10.0%. The three cluster around 10%, which is a far more trustworthy answer than any single method alone. This calculator runs all three side by side.
How to Use This Calculator
Fill in the dividend model inputs (next year\'s expected dividend, current price, sustainable growth rate), the CAPM inputs (risk-free rate, beta, expected market return), and the bond method inputs (the company\'s long-term bond yield plus your equity premium, 3 to 5% typically). The calculator returns each method\'s answer plus the average and the spread. A tight spread means confidence; a wide one means dig into the assumptions.
Enter dividend, price, and growth for the DDM. Skip it mentally if the company pays no dividend.
Enter CAPM inputs and bond yield plus premium. Use the company\'s actual borrowing cost for the bond leg.
Compare the three. Use the average when they agree, investigate when they do not, and feed the result into WACC.
The Three Formulas
Each method sees risk differently. The dividend model reads it from payout expectations: high growth expectations mean high required returns. CAPM reads it from market co-movement: high beta means high required returns. The bond method reads it from the credit spread plus a judgment premium. They disagree most for unusual companies: high-growth non-payers break the DDM, and distorted betas break CAPM. The triangulation exists precisely because each method has a blind spot.
Worked Example
A mature industrial company pays a $2.20 dividend expected next year, trades at $50, and grows dividends 5% annually. DDM: $2.20/$50 = 4.4% yield + 5% growth = 9.4%. CAPM: 4% risk-free, beta 1.1, 10% market return gives 4% + 1.1 x 6% = 10.6%. Its 10-year bonds yield 6%; adding a 4% equity premium gives 10.0%. Average: (9.4 + 10.6 + 10.0) / 3 = 10.0%. Spread: 1.2 points, tight enough to use 10% with confidence. In a DCF at 10% versus 12%, a 5-year $1 million annual cash flow stream is worth $3.79 million versus $3.60 million: the 2-point error costs 5% of value, which compounds over longer horizons.
When Each Method Shines
| Method | Best for | Breaks when |
|---|---|---|
| Dividend discount | Stable dividend payers | No dividend, erratic growth |
| CAPM | Most public companies | Beta unstable or meaningless |
| Bond yield plus | Quick sanity checks | No traded debt, premium is a guess |
Whichever you choose, date-stamp it and revisit when rates move: cost of equity estimated in a 2% rate world is wrong in a 5% world, and valuations built on stale estimates quietly rot. For the full workflow, our CAPM calculator explores the beta method in depth, our WACC calculator blends the result with debt, and our business valuation calculator puts the discount rate to work.
Estimates for planning only, not financial advice.
Frequently Asked Questions
What is cost of equity?
Cost of equity is the return shareholders require for investing in a company: the compensation for tying up capital and bearing equity risk. It is not observable like an interest rate; it must be estimated. With a $2.20 next-year dividend, a $50 share price, and 5% dividend growth, the dividend model gives $2.20/$50 + 5% = 9.4%. Every valuation and hurdle rate starts here.
What is the dividend discount model formula?
The Gordon growth version: cost of equity = (next year's dividend / current price) + dividend growth rate. The dividend yield is the cash return; the growth rate is the price appreciation investors expect. It is beautifully simple and limited to stable dividend payers: it breaks for companies that do not pay dividends or grow erratically.
How does CAPM estimate cost of equity?
CAPM says cost of equity = risk-free rate + beta x (market return - risk-free rate). It prices systematic risk: how the stock moves with the market. Unlike the dividend model, it works for non-dividend payers and ties the estimate to market risk rather than payout policy. Our CAPM calculator runs it standalone.
What is the bond yield plus risk premium method?
A pragmatic shortcut: cost of equity = the company's long-term bond yield + an equity risk premium, typically 3% to 5%. If the company's bonds yield 6% and you add a 4% premium, cost of equity is 10%. The logic: shareholders demand more than bondholders because they bear more risk. It is rough but useful when beta estimates are unreliable.
Which cost of equity method is best?
Use at least two and triangulate. CAPM is the academic standard and works broadly; the dividend model is cleanest for stable dividend payers; bond-yield-plus is the sanity check. When they cluster around 9% to 11%, you have a solid estimate. When they diverge wildly, investigate: the dividend growth assumption or the beta is probably wrong, and the disagreement is telling you something.
Why does cost of equity matter?
It is the discount rate for equity cash flows, the Re in WACC, and the hurdle for equity-funded projects. A 2-point error in cost of equity swings a DCF valuation by 20% or more. Getting it right matters more than most other valuation inputs because it compounds through every year of the forecast.
How do you estimate dividend growth?
Three approaches: historical dividend growth over 5 to 10 years, analyst forecasts, or the sustainable growth formula (retention ratio x return on equity). Historical is backward-looking, forecasts are optimistic, and the sustainable formula ties growth to fundamentals. Use the lowest of the three for conservatism, and never assume growth above long-run GDP growth forever.
What if the company pays no dividend?
The dividend model cannot be used directly. Options: use CAPM, use the bond-yield-plus method, or apply the dividend model to a comparable dividend-paying peer and adjust for risk differences. For high-growth non-payers, CAPM is the standard choice. Do not invent a hypothetical dividend to force the model to work.
Does cost of equity differ from WACC?
Yes. Cost of equity is shareholders' required return; WACC blends it with after-tax debt costs by capital structure weights. Cost of equity is always higher than WACC for a levered firm, because equity is riskier than debt. Use cost of equity to discount cash flows to equity holders; use WACC for cash flows to the whole firm. Mixing them up is a classic valuation error.
How often should cost of equity be updated?
Whenever the inputs move materially: rate regimes change, beta drifts after business model shifts, or dividend policy changes. In stable times, annual review is fine. In volatile markets, the risk-free rate and beta can move enough in a quarter to change investment decisions. Date-stamp every estimate so future you knows what world it assumed.