How Mutual Fund Returns Actually Work
The short answer
A mutual fund return comes from the change in NAV over your holding period, after the scheme's expenses have already been deducted. Returns are reported in different ways — absolute for short periods, CAGR for a single lump sum over more than a year, and XIRR when money went in and out on different dates. A fund's published return and your personal return will usually differ, because the fund's figure assumes one investment held for the whole period while yours depends on when you actually invested.
Two investors in the same scheme over the same five years can end up with very different returns. Nothing is wrong with the fund — the difference comes from when each of them put money in and took it out.
That gap between the fund's return and the investor's return is one of the most useful things a new investor can understand, and it starts with knowing which return figure you are looking at.
Where the return comes from
Your units do not multiply. What changes is the NAV per unit, which moves with the market value of the scheme's holdings. If you hold 500 units and the NAV goes from ₹40 to ₹46, your holding's value goes from ₹20,000 to ₹23,000.
Scheme expenses are accrued and deducted before the NAV is struck, so every return figure you see for a scheme is already net of its expense ratio. Taxes, exit loads and any transaction costs are not — those sit outside the NAV and reduce what you finally keep.
Absolute return
Absolute return is simply the percentage change from start to end, with no reference to time. Going from ₹20,000 to ₹23,000 is a 15% absolute return, whether that took six months or six years.
It is a fair way to describe a period shorter than a year, and a misleading one for anything longer, because it hides how long the money was working.
CAGR: annualising a single investment
Compound Annual Growth Rate answers a narrower question: at what constant annual rate would one lump sum have had to grow to get from its starting value to its ending value over this period?
CAGR is a smoothed figure. It tells you nothing about the path — a fund that fell 30% in year one and recovered strongly can show the same CAGR as one that rose steadily. Two investments with identical CAGRs can be completely different experiences to live through.
XIRR: the return when money moves in and out
CAGR assumes one investment at the start and one value at the end. A SIP breaks that assumption: each instalment has been invested for a different length of time, so there is no single start date to measure from.
XIRR handles this by taking every dated cash flow — each purchase, each redemption, and the current value — and solving for the single annualised rate that makes them consistent. It is the right figure for a real portfolio, because a real portfolio almost never consists of one investment made once.
Point-to-point vs rolling returns
A point-to-point return measures from one specific date to another, which makes it very sensitive to the two dates chosen. A five-year return ending in a strong market looks quite different from the same fund's five-year return ending six months later.
Rolling returns address this by measuring the same holding period repeatedly across many start dates and looking at the distribution of outcomes. This gives a fuller picture of how a scheme has behaved than a single headline number can — though it still describes the past, not the future.
Why the fund's return is not your return
A scheme's published return assumes an investment made on the first day of the period and held untouched to the last. Your return depends on your dates and your amounts.
If you invested more after a strong run and less after a fall — which is what most people do — your money-weighted return will lag the fund's time-weighted figure. Measuring your own XIRR rather than reading the fund's factsheet return is the only way to know what you actually earned.
Reading a return figure honestly
Every return figure published for a mutual fund is historical. It describes what happened to a portfolio over a period that has ended, under market conditions that will not repeat in the same order.
Any forward-looking number — including the ones in the calculators on this site — is an illustration built on an assumption you chose. That distinction between a historical figure and an assumed one is worth keeping firmly in mind whenever a percentage is put in front of you.
Key takeaways
- Returns come from NAV movement and are already net of the scheme's expense ratio.
- Absolute return ignores time; use it only for periods under a year.
- CAGR annualises a single lump sum and deliberately smooths away the path taken.
- XIRR is the correct measure when money entered or left on multiple dates, such as a SIP.
- A fund's published return assumes one investment held throughout — your own return depends on your dates.
- Every published return is historical; every projected return is an assumption, not a forecast.
Put this to work on your own numbers
- XIRR Calculator
Enter your own dated transactions and get the annualised return you actually earned.
- CAGR Calculator
Annualise the growth of a single lump sum between two values.
- Real Return Calculator
See what a return is worth after adjusting for inflation.
Frequently asked questions
Sources and editorial review
Checked against the primary sources below on . Scheme terms, tax rules and regulatory requirements change — confirm the current position before acting on anything here.
- AMFI Investor Corner
AMFI's investor education material on how mutual fund returns are computed and disclosed.
- SEBI Investor Website
SEBI's investor material on performance disclosure and the limits of past performance.
- MutualFundAdvisor.in editorial policy
What to read next
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Amit Chadha is a Mutual Fund Distributor (ARN: 349461). The first conversation is free and educational.