XIRR vs CAGR: Which Return Number Is Right?
Your app says your SIP returned 14%. Your friend swears his did 22%. You bought the same fund. Nobody's lying — you're just reading two different numbers. Here's how to tell them apart.
Two friends, Aman and Kabir, invest in the exact same mutual fund. One evening over chai, Aman says his returns are 14%. Kabir frowns — his app shows 22%. Same fund, same year, wildly different numbers. One of them must be wrong, right?
Neither is. They're just quoting two different kinds of returns — CAGR and XIRR — and this is easily one of the most confusing things for new investors. Once you get the difference, you'll never misread your portfolio again.
The problem with a single 'return' number
Here's the thing money apps don't explain well: how you invested changes which return figure makes sense.
Aman put in ₹1,20,000 as one lump sum on day one and left it. Kabir invested ₹10,000 every month through a SIP for a year — the same ₹1,20,000 in total, but dribbled in over twelve instalments. Their money spent very different amounts of time in the market. So you can't measure them with the same ruler.
CAGR: the return for money that sat still
CAGR stands for Compound Annual Growth Rate. It answers one clean question: if I put in a single amount and left it untouched, what steady yearly rate would take it from the start value to the end value?
It smooths out all the ups and downs into one average annual number. If ₹1,00,000 becomes ₹1,44,000 in three years, the CAGR is about 12.9% a year — as if it grew by that same percentage every year, even though real markets are bumpier. It's perfect for Aman's lump sum, and you can play with it on our CAGR calculator. We also use it in SIP vs lumpsum.
CAGR only knows two things: the starting value, the ending value, and the time between them. It assumes ONE investment made once. The moment you add money at different times — like a SIP — CAGR has no idea what to do with those later instalments, and quietly overstates or understates your real return.
XIRR: the return for money that trickled in
This is where XIRR — Extended Internal Rate of Return — walks in. XIRR is built for messy, real-life investing: many deposits on many dates, maybe a withdrawal or two, all mixed together.
It looks at every single cash flow — each ₹10,000 SIP instalment, on the exact date it went in — and works out one annualised rate that ties all of it together. Crucially, it gives more weight to money that stayed invested longer. Kabir's first instalment worked for 12 months; his last one worked for barely one. XIRR accounts for all of that automatically.
CAGR is for a photo — one amount, start to finish. XIRR is for a movie — money flowing in and out over time.
Why Kabir's number looked higher
Back to our chai. Kabir's app showed 22% because XIRR correctly recognised that most of his money was invested for only part of the year — so the profit it did earn, relative to the short time it was actually in the market, translates into a higher annualised rate. Aman's 14% CAGR reflects a full year of a lump sum growing more gently. Different journeys, different (and both correct) numbers.
This is exactly why your mutual fund statement and apps like Groww or Zerodha Coin report XIRR for your SIPs — it's the honest way to measure returns when you're investing bit by bit. You can estimate your own SIP outcome on the SIP calculator.
Which one should you actually use?
- Invested a one-time lump sum and left it? CAGR is your number.
- Investing through a SIP, or adding money on and off over time? XIRR is the only fair measure.
- Comparing two funds' past performance in a factsheet? Those headline 'X-year returns' are usually CAGR — fine for comparing funds, but not for judging your personal SIP.
A common beginner trap is to compare a fund's advertised 5-year CAGR with your own SIP's XIRR and panic that you're 'underperforming.' You're not comparing like with like — it's apples and oranges. Learn to read your factsheet properly with our guide to mutual fund factsheets.
What it means for you
You don't need to calculate either by hand — your apps do it. What matters is knowing which number you're looking at so you don't draw the wrong conclusion. When you review your portfolio, check whether it's showing CAGR or XIRR, and remember: for a SIP, XIRR is the truth-teller. It quietly rewards you for the money that stayed invested longest — which, not coincidentally, is the whole point of starting early and staying put.
- CAGR measures the steady annual growth of a single lump sum from start to finish — one investment, one number.
- XIRR measures the annualised return when money goes in (and out) on many different dates, like a SIP.
- For SIPs, XIRR is the accurate measure because it weights each instalment by how long it stayed invested.
- Fund factsheets usually quote CAGR — great for comparing funds, but not for judging your own SIP's performance.
- Never compare a fund's advertised CAGR with your personal SIP's XIRR; they answer different questions.
So the next time your friend brags about a return that looks nothing like yours, don't panic — just ask whether it's CAGR or XIRR. Nine times out of ten, that one question explains the whole mystery.
Over to you: did you know which figure your investment app has been showing you all this time? This article is educational and not investment advice.
Frequently asked questions
What is the difference between XIRR and CAGR?
CAGR (Compound Annual Growth Rate) calculates the steady annual growth rate of a single investment from its start value to its end value, assuming no money was added or withdrawn in between. XIRR (Extended Internal Rate of Return) is designed for multiple cash flows on different dates, such as monthly SIP instalments, and gives an annualised return that accounts for how long each amount stayed invested.
Should I use XIRR or CAGR for my SIP returns?
Use XIRR for SIPs. Because a SIP adds money on many different dates, each instalment stays invested for a different length of time, and only XIRR captures that accurately. CAGR is meant for a single lump-sum investment and will misrepresent SIP returns, which is why mutual fund statements and investment apps report XIRR for SIPs.
Why is my SIP XIRR higher than the fund's advertised return?
A fund's advertised multi-year return is usually a CAGR that assumes a lump sum invested at the start of the period. Your SIP's XIRR reflects that much of your money was invested for only part of that period, so the return earned relative to the shorter average holding time can annualise to a higher percentage. The two figures answer different questions and should not be compared directly.
Do I need to calculate XIRR and CAGR myself?
No. Investment platforms and your mutual fund statements calculate these automatically, and spreadsheet tools have built-in XIRR functions if you want to check. What matters most is understanding which figure you are looking at so you interpret your returns correctly rather than the exact manual calculation.
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