What Is CAGR? Compound Annual Growth Rate Explained Simply

Compound Annual Growth Rate (CAGR) measures the annual growth rate of an investment over a specified period, assuming the profits are reinvested at the end of each year. It smooths out the year-to-year volatility of an investment's returns into a single, easy-to-understand annualized figure, making it one of the most widely used metrics in investing.

CAGR is calculated as: (Ending Value / Beginning Value) raised to the power of (1 / number of years), minus 1, expressed as a percentage. While the formula looks technical, the concept behind it is simple: it answers the question, "If this investment had grown at a perfectly steady rate every single year, what would that rate have been?"

Imagine an investment that gains 50% in year one and loses 50% in year two. A simple average would suggest a 0% return, but the actual outcome is a net loss, because losing 50% after gaining 50% doesn't bring you back to where you started. CAGR accounts for this compounding effect, giving a far more accurate picture of actual investment performance over time than a simple arithmetic average of yearly returns.

Suppose you invested ₹1,00,000 in a stock, and five years later it's worth ₹2,00,000. Your investment has doubled, but what does that mean annually? Using the CAGR formula, this works out to roughly a 14.9% CAGR — meaning the investment effectively grew at a steady rate of about 14.9% every year to reach that doubling over five years, even if the actual year-to-year returns varied considerably.

• Comparing the historical performance of different mutual funds or stocks over the same time period

• Evaluating a company's revenue or profit growth over multiple years in its financial statements

• Assessing whether a fund or stock has consistently grown, or whether recent performance was a one-off spike

• Projecting future investment value based on assumed growth rates

While useful, CAGR has important limitations investors should keep in mind. It smooths out volatility, which means it can mask periods of significant drawdown within the overall period. Two investments with identical CAGRs can have vastly different risk profiles — one might have grown steadily, while the other experienced wild swings before arriving at a similar endpoint. CAGR also doesn't account for the timing of cash flows, which matters if you're investing periodically (like through a SIP) rather than as a single lump sum — for that, a related metric called XIRR is more appropriate.

• Always check CAGR alongside volatility or standard deviation to understand the smoothness of the journey, not just the destination

• Compare CAGR over multiple time frames (3-year, 5-year, 10-year) rather than relying on a single period, which can be skewed by a particularly good or bad starting or ending point

• Use CAGR to compare similar types of investments over identical time periods for a fair, apples-to-apples comparison

Understanding CAGR is foundational to reading any company's financial history or evaluating a fund's track record. Powered by Mahir Research, investors can quickly see multi-year CAGR figures for revenue, profit, and other key metrics across listed companies, turning raw historical data into a clear growth narrative. The Mahir Approach to investing treats CAGR as one essential lens among several — powerful for understanding trajectory, but never the sole basis for a decision.