Lumpsum Calculator – One-Time Mutual Fund Investment

How to use the Lumpsum

Enter the amount you'll invest once.
Set the expected annual return and time period.
See the estimated final value, returns and the growth chart.

Lumpsum investing

A lumpsum investment puts a larger amount into a mutual fund or other investment all at once, for example a bonus, a maturity amount from an FD or policy, or proceeds from selling an asset. The money then compounds for the whole period.

The formula

Future value = P × (1 + r)^t, where P is the amount invested, r the annual return and t the number of years. ₹1 lakh at 12% for 10 years grows to about ₹3.1 lakh; at 20 years it’s about ₹9.6 lakh. The rule of 72 gives a quick estimate: at 12%, money roughly doubles every 6 years (72 ÷ 12).

Lumpsum or SIP?

Lumpsum gets all your money working immediately, which helps when markets rise afterwards, but a fall soon after investing hurts more.
SIP spreads purchases over time and reduces the risk of investing at a peak. Compare with the SIP calculator.
A Systematic Transfer Plan (STP) is a middle path: park the lumpsum in a debt fund and transfer a fixed amount into equity monthly.

Choosing a return assumption

Use a realistic, conservative rate for the kind of fund you’re considering, and remember that returns vary widely from year to year. Taxes on capital gains and fund expense ratios reduce what you actually receive.

Guaranteed alternatives

If you need certainty, compare a fixed deposit with the FD calculator. Market-linked returns are not guaranteed; this calculator is for planning, not a promise of returns.

Example: doubling and tripling

Return	Doubles in	Triples in (approx.)
6%	12 years	19 years
8%	9 years	14 years
12%	6 years	10 years

These figures assume constant returns, which real markets never deliver, but they show why time in the market matters.

Rebalance occasionally so a single lumpsum doesn’t leave you over-exposed to one fund or asset class.

Frequently asked questions

How much will ₹1 lakh become in 10 years?

At 12% a year, about ₹3.1 lakh. At 8%, about ₹2.16 lakh.

What is the rule of 72?

Divide 72 by the annual return to estimate the years needed to double your money.

Is lumpsum better than SIP?

It depends on market movements after you invest. SIP reduces timing risk.

Does this include tax?

No. Capital gains tax and fund expenses will reduce the actual value.