Cost of Equity Calculator (CAPM) – Understand in Simple Language

Cost of Equity is the return that shareholders expect when they invest money in a company. Simply put, when an investor buys shares, they not only expect profit but also want compensation for the risk that comes from fluctuations in the stock market.

Cost of Equity helps us understand how attractive an investment is and how much risk is hidden in it. Here’s a simple logic –

More risk → higher cost of equity

Less risk → lower cost of equity

Companies usually raise capital in two ways –

Debt – by taking loans

Equity – by taking money from investors

When a company takes debt, it has to pay interest, which we call the “Cost of Debt.” On the other hand, giving the expected return to equity investors is called the “Cost of Equity.” This return comes to investors either through an increase in share price or as dividends.

However, calculating the cost of equity can be a bit tricky. But there is an easy way – the WACC (Weighted Average Cost of Capital) Calculator, which lets a company calculate the average cost of both sources (Debt + Equity).

Here is the most common formula for the cost of equity:

Cost of Equity=Rf​+β(Rm​−Rf​)

• Rf = Risk-free rate (return without risk, like government bonds)
• β = The company’s stock risk compared to the market
• Rm − Rf = Equity Market Premium (the extra return from the market)