SIP vs Lumpsum: Which Earns More?

Real Numbers from 20 Years of Indian Markets

Picture this: you just received a ₹12 lakh bonus. Your first instinct might be to park it in an equity mutual fund immediately — but a friend says, "Break it into 12 monthly SIPs of ₹1 lakh each." Who is right? This is the single most debated question in retail Indian investing, and the answer is almost never what people expect.

The verdict does not hinge on how disciplined you are or whether you prefer simplicity. It hinges on one thing: market valuation at the time of investment. Invest in a bull market at stretched valuations and SIP — or its smarter cousin, the STP — will save you. Invest at a reasonable valuation in a secular uptrend, and lumpsum quietly beats SIP almost every time.

We ran the numbers across 20 years of Indian market data — across crashes, rallies, and sideways phases — here's what wins, when, and by how much.

The Quick Answer

Markets, by their nature, trend upward over long periods. This simple fact already tips the scales in lumpsum's favour — if you invest the entire corpus on Day 1, you capture more of the upward journey. The data confirms this:

Source: Analysis based on Nifty 50 TRI data, 2004–2024 (NSE India / AMFI)

The mathematics is straightforward: if markets go up during your 12-month SIP window, the later instalments buy units at higher NAVs than the first — reducing the averaging benefit. Lumpsum, having deployed capital on Day 1, benefits from the full rise. The exception arises when markets fall after your investment date; in that case, SIP's rupee-cost averaging (RCA) purchases more units at lower prices and recovers faster.

Key takeaway: The average return between your first and last SIP instalment is the decisive variable. Positive average return → lumpsum likely wins. Negative average return → SIP likely wins.

Real Data: ₹12L Lumpsum vs 12-Month SIP — Last 20 Years

The table below compares what ₹12 lakh deployed as a lumpsum versus ₹1 lakh/month SIP (12 instalments) would have grown to, measured one year after the final SIP instalment (i.e., end of Month 24 for the lumpsum, end of Month 12 for SIP, equalised at the 24-month mark). Values use Nifty 50 TRI as the benchmark.

*2020 lumpsum assumes deployment at April 2020 post-crash levels (Nifty ~8,600). Sources: NSE India TRI data, AMFI NAV history, Moneycontrol market archive.

Cumulative tally (2004–2023, 13 data points above):

Note: All values are indicative estimates using Nifty 50 TRI point-to-point returns. Individual fund performance may vary. Past performance does not guarantee future results.

When SIP Wins

SIP's rupee-cost averaging shines in precisely four conditions:

1. Bear Markets and Sharp Corrections

When the 2008 financial crisis hit, the Nifty 50 fell from approximately 6,200 in January 2008 to roughly 2,700 by October 2008 — a 56% drawdown (NSE India). An investor who lumped ₹12 lakh in January 2008 watched it erode to u