What is a Lumpsum Investment?
A lumpsum investment means putting a single, one-time amount into an investment such as a mutual fund, fixed deposit or bond, and letting it grow over time. You might use it when you receive a bonus, an inheritance, maturity proceeds or sale money. The returns are compounded, so you earn interest on your interest.
This lumpsum calculator shows how much a one-time investment can grow to at the annual return you expect, year by year.
Lumpsum Formula
P = amount invested · r = annual return (decimal) · n = years
| Investment | Return | Years | Future value | Gain |
|---|---|---|---|---|
| ₹1,00,000 | 7% | 5 | ₹1,40,255 | ₹40,255 |
| ₹1,00,000 | 8% | 10 | ₹2,15,892 | ₹1,15,892 |
| ₹1,00,000 | 12% | 10 | ₹3,10,585 | ₹2,10,585 |
| ₹1,00,000 | 12% | 20 | ₹9,64,629 | ₹8,64,629 |
| ₹5,00,000 | 12% | 10 | ₹15,52,924 | ₹10,52,924 |
| ₹10,00,000 | 12% | 15 | ₹54,73,566 | ₹44,73,566 |
The rule of 72
Divide 72 by the annual return to estimate the years needed to double your money. At 12%, money doubles in about 6 years; at 8%, in 9 years. The table confirms it: ₹1 lakh at 12% becomes ₹3.1 lakh in 10 years.
Lumpsum vs SIP
With a lumpsum, the whole amount starts compounding on day one. With a SIP, you invest gradually and reduce the risk of investing everything at a market high. If you have a large amount, you can also invest it through a STP (Systematic Transfer Plan) over a few months. Try the SIP calculator to compare the same money invested monthly.
What Return Should You Expect?
- Fixed deposits and small savings: about 6% to 8%, guaranteed. See the FD calculator.
- Debt mutual funds: about 6% to 8%, with some risk.
- Equity mutual funds: have delivered about 10% to 14% over very long periods, but can fall sharply in the short term and are not guaranteed.
Use a conservative rate for planning, and remember that taxes and fund expenses reduce what you finally keep.
How to Use This Lumpsum Calculator
- Enter the one-time investment amount.
- Enter the expected annual return.
- Choose the number of years.
- Read the future value and gain, then save the report with Preview & Save.
Common Lumpsum Investing Mistakes
- Investing the entire amount in equity just before a major event or at a market high without a plan. Consider an STP over 6 to 12 months.
- Using an unrealistic return rate in the calculator.
- Forgetting taxes and exit loads when you redeem.
- Putting money you may need within 3 years into equity funds.
For a regular investing habit, see the SIP calculator and step-up SIP calculator.