A SIP invests a fixed amount at fixed intervals. A lumpsum invests everything at once. Both buy the same units of the same scheme — the difference is only the entry price path. Why SIPs feel safer Rupee cost averaging means you buy more units when NAV falls. That lowers your average cost in choppy or falling markets and removes the need to time an entry. It also matches how salaried cash flow arrives. Why lumpsum often wins on paper Equity markets rise more often than they fall over long horizons, so money invested earlier spends longer compounding. In rising markets a lumpsum beats a staggered entry almost mechanically. The honest rule If the money already exists in your bank account, the question is risk tolerance, not returns: stagger it via STP from a liquid fund over 6-12 months. If the money arrives monthly from salary, SIP is the only option available, and that is fine. Measuring returns correctly Use XIRR for SIPs — it weights each instalment by time invested. CAGR only describes a single lumpsum held for the whole period. Comparing a SIP's XIRR to an index's CAGR is not an apples-to-apples comparison. Tax treatment Each SIP instalment has its own holding period for capital gains. Redeeming "the SIP" actually redeems many tranches, and units held under 12 months attract short-term rates on equity schemes.
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