Cost of Equity Calculation: Formula, Methods and Examples

Key Highlights 

• Cost of equity is the return shareholders expect for investing in a company. 
• There are two main methods to calculate cost of equity, the CAPM formula and the Dividend Growth Model. 
• CAPM uses the risk-free rate, beta, and market return, and works for most companies, even those that don't pay dividends. 
• The Dividend Growth Model uses dividend payments and growth rate, but only works for companies with steady, predictable dividends. 
• In this blog, you will learn what cost of equity means, the calculation of cost of equity by two main formulas, a step-by-step breakdown of both the formulas, comparison, and common mistakes. 

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What Is the Cost of Equity? 

Cost of equity is the return a company offers to its stockholders to keep them invested. Think of it as the ‘price' it pays for using shareholders' money, like we interest on using bank money. 

Here the difference is that this price isn't fixed like a loan rate. Nobody signs a contract promising shareholders at a certain rate of return. Investors just expect what risk they're taking by owning the stock instead of something safer. 

So, companies (and analysts) have to estimate that expected return. That estimate is the cost of equity. 

Also read: Complete Guide on Capital Budgeting in Financial Management 

Cost of Equity Calculation Formula 

To calculate the cost of equity, there are two main methods. Each one looks at the problem from a different angle. 

• The CAPM method works on risk. Checks how volatile the stock is compared to the market, and prices that risk. 
• The Dividend Growth Model looks at cash returns. How much a stock pays in dividends, and how fast that payment is expected to grow. 

Both the formulas give the same number in the end: an estimate of what return shareholders expect. Let's discuss the cost of equity formulas in detail below. 

CAPM Formula for Cost of Equity 

Cost of Equity = Risk-Free Rate + Beta × (Market Return − Risk-Free Rate) 

Here's what each term means: 

• Risk-free rates is the return you could expect from a relatively safe investment, such as a government bond. 
• Market return means the return investors expect from the overall stock market. 
• Beta shows how much a stock tends to move compared with the market. A beta of 1 move in line with the market, while a beta above 1 indicates higher volatility. A beta below 1 means the stock tends to be less volatile than the market. 

That’s how, if a stock is riskier, investors demand a higher return to hold it. That pushes the cost of equity up. 

Cost of equity calculation example with CAPM: assume risk-free rate is 5%, market return is 11%, and beta is 1.3. 

So, the calculation will be  

Cost of equity = 5% + 1.3 × (11% − 5%) = 12.8% 

That means investors expect a 12.8% return to keep their money in that stock. 

Dividend Growth Model Formula 

The dividend growth model formula doesn't care about volatility. It looks at what the company actually pays to shareholders, and how that payment is growing. 

Cost of Equity = (Next Year's Dividend ÷ Current Share Price) + Dividend Growth Rate 

Here's what each term means: 

• Next year's dividend is the dividend per share that you expect the company to pay next year. 
• Current share price is what the stock costs today. 
• Dividend growth rate shows how fast the company dividend has been growing; it is an estimation from past years. 

This method only works for companies that pay steady, and predictable dividends. For companies that don't pay dividends, this formula won't give a usable number. 

Let’s take an example: assume next year's dividend is ₹2, current share price is ₹50, and dividend growth rate is 5%. 

Cost of equity = (2 ÷ 50) + 5% = 4% + 5% = 9% 

So, investors can expect a 9% return. This is based on the dividend income plus the growth in that dividend over time. 

Also read: What Is Customer Lifetime Value? How To Calculate It? 

How to Calculate Cost of Equity Using CAPM 

Above, we understood the cost of equity calculation CAPM formula, just as an overview. Here, we'll break it down step by step, so you know exactly where each number comes from. 

Step 1: Determine the Risk-Free Rate 

Risk-free rate is the return that you would get from an investment with virtually no risk of default. 

Most analysts use the yield on a government bond for this, usually a 10-year Treasury bond. The concept is simple; this is the minimum return any investor would accept, since they could earn this much without taking stock market risk. 

Let's assume the current risk-free rate is 4%. 

Step 2: Find the Company's Beta 

Next, we will find the company's beta. Beta measures how much a stock moves compared to the overall market. 

The beta is usually available on financial data platforms like Yahoo Finance, Bloomberg, or a company's investor relations page. So, you don't need to calculate it by hand. 

If we assume our company has a beta of 1.5, this means it's riskier than the average market stock. 

Step 3: Calculate the Equity Risk Premium 

Equity risk premium is the extra return investors expect for choosing the stocks over a risk-free investment. The formula for this is as follows: 

Equity Risk Premium = Market Return − Risk-Free Rate 

Market return is the expected return of the overall stock market, this is often estimated using historical averages of an index like the S&P 500. 

Let's assume the expected market return is 10%. So, the equity risk premium is: 

10% − 4% = 6% 

Step 4: Apply the CAPM Formula 

Now put every figure into the CAPM formula: 

Cost of Equity = Risk-Free Rate + Beta × Equity Risk Premium 

Using the numbers we assume: 

Cost of Equity = 4% + 1.5 × 6% 

Cost of Equity = 4% + 9% 

Cost of Equity = 13% 

So, this means investors expect a 13% return to hold this stock, given its risk level. 

Also read: Why MBA in Finance is Worth It: Career & Growth Insights 

How to Calculate Cost of Equity Using the Dividend Growth Model 

Earlier, we introduced the Dividend Growth Model formula. Now, let's break down each step to understand how to calculate the cost of equity. 

Step 1: Determine the Expected Dividend 

First check dividend the company is expected to pay next year, not the dividend it paid last year. 

If the company has been increasing its dividend steadily, you can estimate next year's dividend by taking the most recent dividend and growing it by the expected growth rate. 

Let's assume, company paid a dividend of ₹2.85 this year, and it's expected to grow. Based on that growth, next year's dividend comes out to ₹3. 

Step 2: Find the Current Share Price 

Next, find the current market price of the stock. You can find this from any stock exchange listing or financial platform, as it's publicly available in real time. 

Now, let's assume the current share price is ₹75. 

Step 3: Estimate the Dividend Growth Rate 

Here, estimates how fast the company's dividend has been growing; this is usually based on its dividend history over the past several years. 

You can do this by looking at the dividend growth over a few years and calculate the average annual growth rate. Companies that grow earnings steadily tend to grow dividends steadily too. 

Let's say the company's dividend growth rate comes out to 6%. 

Step 4: Apply the Dividend Growth Formula 

Now put all three numbers we assume into the formula: 

Cost of Equity = (Next Year's Dividend ÷ Current Share Price) + Dividend Growth Rate 

Using our numbers: 

Cost of Equity = (3 ÷ 75) + 6% 

Cost of Equity = 4% + 6% 

Cost of Equity = 10% 

This means investors expect a 10% return from stock, combining the dividend income and the growth in that dividend over time. 

Remember, this method only works for companies with a stable, predictable dividend history. If a company doesn't pay dividends, or its payments are inconsistent, this formula won't give you a reliable number, and CAPM is the better choice in that case. 

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CAPM vs Dividend Growth Model for Cost of Equity 

A side-by-side comparison of both the methods: 

Factor	CAPM	Dividend Growth Model
Main factors	Risk-free rate, beta, market return	Dividend, share price, growth rate
Is a Dividend required?	No	Yes
Risk consideration	Directly accounts for market risk	Doesn't look at risk directly
Best suited for	Most types of companies	Companies that pay steady dividends
Complexity	Slightly more complex; requires beta and market data	Simpler, requires fewer inputs
Data availability	Beta and market return are easy to find online	Needs a steady dividend history
Market sensitivity	Reflects current market trends	Doesn't factor in market changes much
Common users	Analysts, bankers, finance teams	Investors who focus on dividend stocks

Also read: 20+ Must-Have Finance Skills For Success in 2026 

Common Mistakes in Cost of Equity Calculation 

Even though the formulas look simple, people often get the numbers wrong. Here are some common mistakes to check and not repeat. 

1. Using the Wrong Risk-Free Rate 

Using a short-term bond yield instead of a long-term one. This can give you a wrong calculated number. Stick to a long-term government bond, like a 10-year Treasury, as it matches the long-term nature of stock investing. 

1. Using an Outdated Beta 

Beta changes over time as a company's business and risk profile change. Using an old beta number can give you a cost of equity that is not related to the company. Before calculating, always check that you're using a recent beta. 

1. Mixing up Historical and Expected Market Return 

Some people plug in last year's market return instead of the expected future return. The market return in CAPM should reflect what investors expect going forward, not just what happened in the past. 

1. Assuming Dividend Growth Will Stay Constant Forever 

The growth rates change over time. So, assuming a company's dividend will grow at the same rate forever, especially a high rate, can overstate or understate the true cost of equity. 

1. Forgetting that Cost of Equity is Just an Estimate 

Sometimes people treat the final number as exact. But that number is not final. It's based on assumptions about risk, market return, and growth, all of which can change. Small changes in these inputs can lead to noticeably different results. 

Also read: Is an Online MBA Worth It in 2026? ROI, Salary & Career Growth Explained 

Conclusion 

The cost of equity is based on the simple idea that shareholders take risk, so they expect a return for it. Whether CAPM or the Dividend Growth Model is used, you're just trying to estimate what that expected return looks like. 

CAPM works for most companies and directly accounts for risk through beta. The Dividend Growth Model is simpler, but it only makes sense for companies with a steady dividend history. 

Neither method gives you an exact number. Both are estimates based on assumptions, and those assumptions can change. So, it's worth treating the cost of equity as a useful guide, not a fixed fact. 

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