Why Should You Start Investing Early? The Power Of Compounding

By Author: fiona-d-souza
Total Articles: 2
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Picture two friends, same college, same city, same salary the year they graduated. Priya opened an app and got her demat account opening done at 25. She started a plain ₹5,000 SIP and mostly forgot about it. Rohit had a different plan. "Once I'm earning more," he kept telling himself. He finally sorted his demat account opening at 35, same ₹5,000 SIP, same intentions.

Here's a question worth sitting with: what if the money you keep telling yourself you'll "invest later" is costing you more by doing nothing at all, right now? There's an old saying that the best time to plant a tree was twenty years ago, and the second best time is today. Compounding is oddly generous that way. It rewards showing up late almost as much as showing up on time. It just doesn't reward waiting forever.

What Is the Power of Compounding?

Compounding, in plain terms, means your money earns a return, and then that return earns a return too. Simple interest is more one-note: it pays you on the amount you put in, year after year, and only that. Compounding keeps adding fuel to the fire, because it pays you on your original amount ...
... plus every rupee that amount has already made.

Here's a small example. Put in ₹10,000, and say it grows 10% in year one; you're now sitting on ₹11,000. Next year, that same 10% works on the full ₹11,000, not just the ₹10,000 you started with. Over a single year, you'd barely notice. Give it twenty or twenty-five years, and the gap turns into something else entirely.

Why Starting Early Beats Starting Big

Let's put real numbers to this, with one caveat: what follows is illustrative, not a promise of what you'll earn. Assume, just for the sake of the maths, that an equity-oriented mutual fund SIP grows at a hypothetical 10% a year. Your real returns will depend on the market and the scheme you pick, and nothing here guarantees either.

Investor
Age Started
Monthly SIP
Years Invested (till age 50)
Total Invested
Hypothetical Corpus at 10%*




Priya
25
₹5,000
25
₹15,00,000
₹66,34,167


Rohit
35
₹5,000
15
₹9,00,000
₹20,72,352

*Illustrative figures only. Not a guaranteed or assured return. Mutual fund investments are subject to market risks.

Priya put in only ₹6 lakh more than Rohit across their two timelines, yet her corpus ends up roughly ₹45.6 lakh ahead of his. That's not Priya being smarter with her money, or luckier with the market. That's simply what ten extra years of compounding does when you leave it alone.

The First Step Most People Delay: Demat Account Opening

A demat account is where your shares, your mutual fund units, and your IPO allotments sit, in electronic form, the moment you own them. Skip this step, and you can't buy stocks, apply for an IPO, or run many mutual fund SIPs through the market route at all.

Think of the account as the seed. Plant nothing, and there's simply no ground for anything to grow in later, however patient you are. The account itself isn't what costs you time. The waiting before you open it is.

Documents and Steps for Demat Account Opening

These days, demat account opening in India happens almost entirely online. You'll typically need:

Your PAN card
Aadhaar, for e-KYC and address proof
A bank account linked for payments and payouts
A recent photo and your signature
A short video KYC or in-person check, depending on which broker you pick

Most brokers can finish demat account opening in a day or two once everything's submitted and verified, though it does vary.

Common Mistakes That Cost Investors Years of Compounding

Waiting for the "right time." Markets are basically always uncertain about something. Time in the market tends to matter more than timing it perfectly.
Pausing SIPs when markets dip. A dip just means your fixed SIP buys you more units for the same money, not fewer.
Withdrawing early "just to check." Every withdrawal resets a chunk of the compounding clock, whether you meant it to or not.
Never bumping up the SIP as your salary grows. Leave the amount unchanged for a decade, and inflation eats into it steadily, even if you never notice the bite.

Be honest: which of these have you done? Drop it in the comments. Most investors have made at least one, and there's no shame in it.

How Much Difference Do 5 or 10 Years Really Make?

Sticking with the same hypothetical 10% growth, here's what a flat ₹5,000 monthly SIP could turn into by age 50, purely based on when you started:

Starting Age
Years Invested
Hypothetical Corpus at Age 50*




25
25
₹66,34,167


30
20
₹37,96,844


35
15
₹20,72,352


40
10
₹10,24,225

*Illustrative only, based on a hypothetical 10% annual growth rate. Not a guaranteed or assured return.

Notice the pattern? Compounding works best inside a proper investment portfolio, not a single SIP running on its own. If you haven't built one yet, it's worth reading about building a diversified investment portfolio so this SIP becomes one piece of a bigger plan, not the whole plan.

The Takeaway

Every tall tree you've ever admired started life as a seed somebody wasn't in a rush to plant. Every large corpus you've ever envied started as an ordinary SIP somebody didn't put off. Demat account opening is really just the five minutes of paperwork standing between you admiring that tree and planting your own.

This is educational content, not investment advice. Investments are subject to market risks. Please read all scheme-related documents carefully before investing.