What this calculator is for
A mutual fund pools money from many investors and a fund manager deploys it according to a stated mandate. You own units; their price, the NAV, moves with the value of what the fund holds. Your return is the change in NAV over your holding period, plus any payouts.
This calculator projects that forward. You supply the amount, the expected annual return and the period; it compounds them and splits the result into what you invested and what was added. Use the toggle at the top to switch between a one-time investment and a monthly one.
What drives the number
The rate. Easily the most sensitive input. Over twenty years the difference between 10% and 12% on the same investment is not 20% more money — it is closer to 45% more. Compounding amplifies small differences in rate into large differences in outcome.
The period. Returns do not accumulate evenly across it. The last five years of a twenty-year investment typically add more rupees than the first ten, because they compound on a much larger balance.
The amount matters least, in the sense that it scales the result linearly. Double it and you double the outcome. Rate and time do not behave so politely.
Choosing a rate by fund category
A single calculator covers every fund type, so the rate you enter is where the category actually shows up:
- Equity funds invest largely in shares. Higher expected return, higher variability, and they need a long horizon to be sensible.
- Debt funds hold bonds and money market instruments. Steadier, with returns broadly tracking prevailing interest rates.
- Hybrid funds hold both, and land in between on both counts.
The honest approach is to pick a rate that reflects the category and the period, then test it. Run your number at the rate you believe, then again two percentage points lower. If the plan only works at the higher figure, it is the assumption doing the work.
How to use this calculator
- Choose Lumpsum for a one-time investment or SIP for monthly instalments.
- Enter the amount.
- Set the expected return rate for the category you are modelling.
- Set the time period.
- Read the invested amount, the estimated returns and the total value, with the split shown beside them.
Reading the result honestly
Two things to hold in mind.
First, the figure is gross. Every fund charges an expense ratio, deducted from NAV daily, so the return you receive is lower than the return the fund generates. Over decades the gap compounds like everything else.
Second, a constant rate is a convenient fiction. Real returns arrive in an uneven sequence, and the sequence matters — especially if you are withdrawing. For an accumulation plan with no withdrawals, the end value depends mostly on the average; for anything involving withdrawals, the order of the good and bad years matters a great deal.