Money Basics · SIPs & mutual funds

Why SIPs beat lump sum for most people

A SIP (Systematic Investment Plan) means investing a fixed amount in a mutual fund every month. Automatically. The magic is not in the discipline. It's in the math.

Rupee cost averaging

Markets go up and down. When you invest the same ₹5,000 every month:

• Markets fall: your ₹5,000 buys MORE units (cheaper)
• Markets rise: your ₹5,000 buys FEWER units (expensive)

Over time, your average cost per unit is lower than the average price. This is rupee cost averaging, and it's the reason SIPs outperform most lump-sum investors who try to time the market.

> The fear of 'what if I invest a lump sum and the market crashes next week?' disappears with a SIP. It doesn't matter. Next month's SIP buys more units at the lower price.

Lump sum vs SIP: when lump sum wins

If you have ₹5 lakh and you're investing at the bottom of a bear market. Lump sum wins. You get the most units at the lowest price.

But almost nobody times the bottom correctly. Most retail investors who go lump sum do it when markets feel 'safe', which is usually near the top.

When SIP wins

When markets are uncertain, volatile, or at high valuations. SIPs remove the timing decision entirely.

₹5,000/month₹60,000/year invested → at an assumed 12% for 20 years = ₹49.5 lakh

₹5,000/month₹60,000/year invested → at an assumed 12% for 30 years = ₹1.75 crore

12% is the rate this example assumes so the arithmetic has something to run on. It is not a rate anyone is promising you.

The compounding turbocharge

SIPs work best when you stay invested through crashes. The worst thing you can do is stop your SIP when markets fall. That's when the cheapest units are available.

Set up a SIP. Leave it running for 10+ years without checking it obsessively. That's the strategy.

Takeaway. SIPs use rupee cost averaging to automatically buy more when markets are down. The best SIP strategy is to start it and never stop it during crashes.