How Your SIP Actually Grows: A Real Example

A SIP just means you put in a fixed amount every month, instead of one big amount at once. The reason it works so well isn't magic — it's time. Here's exactly what that looks like with real numbers.

The setup

₹15,000 every month, for 15 years, in an equity fund expected to grow at 12% a year. Over that time you put in ₹27L of your own money, in total.

What actually happens to it

Each month's ₹15,000 doesn't just sit there — it starts earning its own returns right away, and those returns earn further returns too. Money you put in during year 1 has 15 years to grow; money you put in during year 14 only has about a year. That's why the gap between what you put in and what it's worth grows so much faster in the later years than the earlier ones:

By the end, ₹27L of actual money invested has grown into ₹75.69L before tax — almost 2.8× what was put in. None of that extra amount is money you added — it's what compounding did on its own.

The other reason SIPs help: you don't need to time the market

Because you're investing a fixed amount every month regardless of what the market is doing, you automatically buy more units when prices are low and fewer when prices are high. This is called rupee cost averaging, and it means you never have to guess whether right now is a good time to invest — the averaging happens on its own, month after month.