Lumpsum calculator

The value at the end is the amount invested multiplied by (1 + r) raised to the power t, where r is the yearly return as a decimal and t is the number of years. The sum compounds once a year: each year's return is earned on the original amount and on the returns of earlier years.

Gains are the value at the end minus the amount invested.

₹1,00,000 at 12% a year for 10 years: 1.12 raised to the power 10 is about 3.1058, so the value at the end is ₹3,10,585 and the gains are ₹2,10,585. Doubling the amount to ₹2,00,000 doubles the result to ₹6,21,170.

Five more years on the same ₹1,00,000 gives ₹5,47,357, and a return 2 percentage points lower (10%) gives ₹2,59,374. The page shows all three beside the main result.

A lumpsum is invested in one go on day one. A SIP (systematic investment plan) invests a fixed amount at regular intervals, so each instalment grows for a different length of time. Spread over months, the same total compounds for fewer years on average, so the two calculators give different results.

The calculator applies one fixed return every year. A fund's actual return changes from year to year, so the result is arithmetic on an assumed rate and not a forecast of any fund.

It also leaves out the fund's expense ratio (the yearly fee deducted from the fund's assets), exit load, tax and inflation. Gains on equity-oriented mutual fund units held for more than 12 months are taxed at 12.5% on the part above ₹1.25 lakh in a financial year, and shorter holdings at 20%; debt fund gains are taxed at the holder's income tax slab rate for units bought on or after 1 Apr 2023.

The page accepts 1% to 30% a year, ₹1,000 to ₹10,00,00,000 and 1 to 40 years. The rate is the compound annual growth rate (CAGR): the single yearly rate that turns a starting value into an ending value. The page also lists the ten largest funds by average assets over the latest quarter, each linking to its NAV history.