What is a lumpsum investment?
A lumpsum investment is a single, one-time deposit into a mutual fund, stock or any other asset, as opposed to the monthly drip of a SIP. People typically invest a lumpsum when they receive a bonus, an inheritance, maturity proceeds from an FD or PPF, or the sale of property. Because the entire amount starts compounding from day one, a lumpsum invested early can outgrow a SIP of the same total value — provided the market does not fall sharply right after you invest.
How this calculator works
Enter the amount, the annual return you expect and the number of years. The calculator applies compound annual growth: each year’s return is added to the balance and earns a return itself the following year. The table shows the value at the end of every year so you can see how growth accelerates in later years.
Lumpsum formula
Future value = P × (1 + r)ⁿ
- P = amount invested
- r = expected annual return as a decimal (12% → 0.12)
- n = number of years
Example: ₹1,00,000 at 12% for 10 years grows to 1,00,000 × 1.12¹⁰ ≈ ₹3,10,585. The gain of ₹2.1 lakh is more than double the original investment — that is compounding at work. Hold for 20 years and the same amount becomes ≈ ₹9.65 lakh; 30 years, ≈ ₹29.96 lakh.
The rule of 72
A quick mental shortcut: divide 72 by the annual return to get the approximate number of years for money to double. At 12% it doubles every 6 years; at 8% every 9 years; at 6% (a typical FD after tax) every 12 years. The calculator’s yearly table lets you verify this.
CAGR: reading returns correctly
The “expected return” field is a compound annual growth rate (CAGR). If a fund’s factsheet says “5-year return: 14.2%”, that is a CAGR — not the total gain. To convert a total gain into CAGR: CAGR = (Final ÷ Initial)^(1/years) − 1. An investment that went from ₹1 lakh to ₹2 lakh in 5 years has a CAGR of about 14.9%, not 20%.
Lumpsum vs SIP
- Lumpsum puts the full amount to work immediately. Best when you have the money now and a long horizon.
- SIP spreads entries over time and reduces the risk of investing everything at a market peak.
- A common middle path is to park the lumpsum in a liquid fund and move it into equity over 6–12 months through a Systematic Transfer Plan (STP).
Things the calculator does not include
Returns are assumed constant every year; real markets fluctuate. Expense ratios are already reflected in published fund returns, but exit loads and capital-gains tax are not. Equity gains held over a year are taxed as long-term capital gains above the annual exemption limit — factor that into your final figure.
Frequently asked questions
How is lumpsum return calculated?
Future value = P × (1 + r)^n, where P is the amount invested, r is the expected annual return and n is the number of years.
SIP or lumpsum — which is better?
Lumpsum works well when you already have a large amount and markets are reasonably valued; SIP averages your purchase price over time and suits regular income earners. Many investors use both.