How lumpsum returns work
A lumpsum investment grows by compound interest: Maturity = A × (1 + r)ⁿ. ₹1 lakh at 12% for 10 years becomes about ₹3.1 lakh, and the same amount over 20 years becomes ₹9.6 lakh, which is why time matters more than the initial sum.
When a lumpsum makes sense
Bonuses, maturity proceeds and inheritances are natural lumpsum candidates. If markets are near highs, many investors park the money in a liquid fund and move it into equity over 6–12 months through a systematic transfer plan to reduce timing risk.
Lumpsum vs SIP
Mathematically a lumpsum invested at the start outperforms an equal total invested through SIPs in a rising market, because the money spends longer invested. In a falling or sideways market the SIP wins. Over 10+ years the difference narrows.
Frequently asked questions
What is the rule of 72?
Divide 72 by your annual return to estimate how many years it takes to double your money. At 12% that is about six years.
Does this include inflation?
No. To see real returns, subtract expected inflation (around 5–6% in India) from the rate you enter.
Which funds suit lumpsum investing?
Index funds, balanced advantage funds and debt funds are common choices depending on your horizon and risk appetite.