Compound Annual Growth Rate.
CAGR
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The number that lets you compare anything to anything
Compound Annual Growth Rate is the great equaliser of investing. It takes any investment, whether held for eleven months or eleven years, and expresses its return as a single smoothed annual rate. That is what makes it so useful: you can put a fixed deposit, a mutual fund, a plot of land, and a stock side by side and ask one honest question, which one actually compounded faster. The formula is clean: CAGR equals the ending value divided by the beginning value, raised to the power of one over the number of years, minus one.
Where absolute return quietly misleads you
Mutual fund factsheets and brokers love quoting absolute return, the simple total gain, because it sounds large. A fund that turned ₹1 lakh into ₹2.5 lakh boasts a 150% return. True, but over how long? If it took six years, the honest annualised figure is far more modest. CAGR strips out the flattery by accounting for time. Whenever an investment is held longer than a year, insist on the CAGR, not the absolute number, or you will systematically overrate slow performers.
Worked example: ₹1 lakh growing to ₹2.5 lakh in six years
Suppose you invested ₹1,00,000 and it is worth ₹2,50,000 after six years. The absolute return is a flattering 150%. The CAGR tells the real story.
So a 150% absolute return is really a 16.5% annual compounding rate. The line below traces ₹1 lakh growing at 16.5% a year to ₹2.5 lakh.
The one thing CAGR hides: the ride
CAGR pretends your money grew in a perfectly smooth curve. It never does. A fund could fall 40% in year two and roar back in year five and still post a 16.5% CAGR. So CAGR is honest about the destination but silent about the volatility along the way. For a lumpsum that you invested once and left alone, CAGR is exactly the right measure. The moment you are adding money monthly, as in an SIP, CAGR breaks down, because each instalment was invested for a different length of time. There you need XIRR, which weights every cash flow by its own holding period.
A realistic benchmark for Indian investors
To read your own CAGR sensibly, anchor it to what the major asset classes have delivered. Indian large-cap equity indices have compounded somewhere in the low teens over long periods. A bank fixed deposit currently sits near 7%. Gold has been lumpy but has done respectably over decades. So a 16.5% CAGR like our example is a strong equity-like result. If a "guaranteed" scheme promises you a 16.5% CAGR with no risk, that is a red flag worth walking away from, because no risk-free Indian instrument pays anywhere close.
Watch the start date: point-to-point can deceive
A subtle trap with CAGR is that it depends entirely on two dates, the start and the end. A fund advertised with a glittering 18% CAGR may simply have started its measurement at a market bottom, like March 2020, and ended at a peak. Shift the start date by even a few months and the same fund might show 11%. This is why seasoned investors prefer "rolling returns", which compute the CAGR over many overlapping windows (say, every 3-year period in the last decade) and then look at the average and the worst case. A single point-to-point CAGR is a fact, but it is one cherry-picked fact. Before you trust a number on a factsheet, ask what start and end dates produced it, and whether a less flattering window would tell a different story. For your own portfolio the dates are fixed by reality, so the calculator’s single CAGR is exactly right; the caution applies when someone is marketing a product to you.
Can CAGR be negative?
Yes. If your ending value is below your beginning value, the ratio is under 1 and the CAGR comes out negative, telling you the investment shrank at that annual rate. A drop from ₹1,00,000 to ₹80,000 over three years is a CAGR of about minus 7.2% a year.
Should I use CAGR for periods under a year?
It is technically valid, but be cautious. Annualising a two-month return into a CAGR can produce an absurdly large number that no investment will sustain. For holdings shorter than a year, the plain absolute return is usually the more honest figure to quote.