How are mutual fund returns calculated?
A mutual fund’s return depends on how the money goes in. Invest a single amount and it grows as one block, compounding on itself until you redeem. Invest monthly through a SIP and every instalment is really its own mini-investment that compounds for a different length of time, so the maths adds up many overlapping growth curves instead of one.
This calculator switches between the two. Pick lumpsum and it compounds your amount once across the full tenure; pick SIP and it treats the same figure as a monthly contribution. The gap between the two results for an equal rupee inflow comes mostly from how long each rupee actually stays invested.
CAGR vs absolute return vs XIRR
Three numbers all get called ‘return’, and they are not interchangeable. Absolute return is the plain total gain — grow ₹1,00,000 into ₹1,50,000 and that is 50%, with no mention of time. It is honest for one period but useless for comparing investments held for different lengths.
CAGR (compound annual growth rate) fixes that by expressing growth as a smooth yearly rate, which is the right measure for a single lumpsum held over several years. But CAGR assumes one entry and one exit, so it breaks down for a SIP where money enters every month. For that you need XIRR — the rate that accounts for many cash flows on many different dates. XIRR is the honest figure for any SIP, step-up or irregular investing.
Equity vs debt vs hybrid returns
What return is reasonable to assume depends on the type of fund. Equity funds ride the stock market — historically the most rewarding over long horizons, but the most volatile from year to year. Debt funds lend to bonds and are steadier while earning less. Hybrid funds blend the two to sit somewhere in between.
The ranges below are broad historical averages, not forecasts. Any single year can land well outside them and a fund can lose money, so match your assumed return to the fund type and your holding period, and lean conservative.
| Equity funds | ~10–13% p.a., highest risk |
| Hybrid funds | ~8–10% p.a., moderate risk |
| Debt funds | ~6–8% p.a., lowest risk |
What fees do to your returns
Every mutual fund charges an annual expense ratio — a percentage of your investment covering management and costs, deducted before the return you see. It sounds tiny, but because it is levied every year on your whole balance, it compounds against you exactly the way returns compound for you.
One percentage point of fees quietly costs about ₹15,80,000 in the example below — more than the ₹10,00,000 you originally invested. That is the main reason low-cost index funds and direct plans have grown popular: the same market exposure with a smaller drag.
| At 12% before fees | ₹96.5 lakh |
| At 11% after a 1% fee | ₹80.6 lakh |
| Given up to fees | ~₹15.8 lakh |