SIP vs Lumpsum: Which Is Better for Mutual Funds?

If you earn monthly, SIP is the natural choice

Most salaried investors don't have a big sum sitting idle — they have a monthly surplus. A SIP invests it automatically. ₹10,000 a month for 20 years at 12% grows to about ₹1 crore on ₹24 lakh invested.

SIPs also enforce discipline and buy more units when prices are low (rupee-cost averaging), which takes the guesswork out of timing.

If you already have a lumpsum, time in the market matters

₹12 lakh invested at once for 10 years at 12% grows to about ₹37.3 lakh. The same ₹12 lakh spread as a ₹10,000 SIP over those 10 years grows to about ₹23.2 lakh, because most of the money is invested for less time.

Since markets rise more often than they fall, investing a lumpsum straight away has historically come out ahead more often. The risk is investing just before a big fall — which can take years to recover from.

The middle path: STP

A Systematic Transfer Plan parks the lumpsum in a liquid or debt fund and moves a fixed amount into an equity fund every week or month. It reduces timing regret while still earning something on the money waiting to be invested. 6–12 months is a common spread.

Quick decision guide

• Monthly income to invest → SIP (and step it up yearly).
• Large sum, long horizon, comfortable with volatility → lumpsum.
• Large sum, nervous about timing → STP over 6–12 months.
• Money needed within 3 years → neither in equity; use FDs or debt funds.

Frequently asked questions