Why Starting Your SIP 5 Years Earlier Beats Investing More

Most people we meet in Tirupati say the same thing about investing: "I will start once my salary goes up." It sounds sensible. But when it comes to a SIP, the year you start usually matters more than the amount you start with. Let us show you why, with numbers you can check yourself.

Two friends, one five-year gap

Take two friends, Ravi and Suresh. Both put ₹5,000 a month into an equity mutual fund through a SIP, and both stop at age 60. The only difference is when they begin.

• Ravi starts at 25. He invests for 35 years, or 420 monthly instalments. Total invested: ₹21 lakh.
• Suresh starts at 30. He invests for 30 years, or 360 instalments. Total invested: ₹18 lakh.

For this illustration we assume a return of 12% a year, compounded monthly at 1% a month, with each instalment paid at the start of the month. This is an assumed rate, not a promise. Real returns go up and down, and some years are negative.

At 60, the illustration gives:

• Ravi: about ₹3.25 crore
• Suresh: about ₹1.76 crore

Ravi put in only ₹3 lakh more than Suresh. Yet his corpus is about ₹1.48 crore larger.

Where does the extra ₹1.48 crore come from?

It comes almost entirely from Ravi's first five years. Between 25 and 30 he invests 60 instalments of ₹5,000, which is ₹3 lakh. At the assumed rate, that grows to about ₹4.12 lakh by age 30. Then that money sits in the fund for another 30 years, compounding at 1% a month. By 60, those first five years alone grow to about ₹1.48 crore.

That is the whole difference between the two friends. The early money had more time, and time does the heavy lifting in compounding. The last few years of a long SIP often add more growth than the first ten years put together, simply because the base is so large by then.

How much more would Suresh need to invest?

Suppose Suresh wants to reach Ravi's ₹3.25 crore by 60, still starting at 30. At the same assumed rate, he would need a SIP of about ₹9,200 a month, almost double Ravi's amount, for 30 years.

So a five-year delay does not cost you five years of savings. It can cost you close to half the final outcome, or force you to nearly double your monthly effort to catch up. Waiting another five years, to 35, makes it harder again: ₹5,000 a month from 35 to 60 comes to about ₹95 lakh in the same illustration.

"But I can only spare ₹2,000 right now"

That is fine. Many funds allow a SIP from ₹500 a month. A small SIP started now does two useful things:

• It starts the clock on compounding, which you cannot buy back later.
• It builds the habit. People who start small tend to increase their SIP as income grows. People who wait for the "right amount" often keep waiting.

A few practical points before you begin:

• Keep an emergency fund first. A SIP works best when you never have to stop it to pay a hospital bill or a sudden repair.
• Match the fund category to the goal. Equity funds suit goals that are seven years or more away. Money you need in two years belongs somewhere steadier.
• Expect ups and downs. In a falling market your SIP buys more units at lower prices. Stopping at that point is the most common mistake we see.
• Increase it every year. Even a small yearly step-up changes the outcome noticeably.

If you are already past 30, the lesson is not "you are too late". The lesson is that the best time to start is the earliest date you realistically can, which is usually this month. A 40-year-old in Renigunta or a 45-year-old doctor in Tirupati still has 15 to 20 years of compounding ahead for retirement, and more for goals like a grandchild's education. Start with what you can, and review the amount once a year.

What to do next

Try your own numbers in our SIP calculator: change the start age and see how the corpus moves. When you are ready to start, read how we help you set up a SIP that fits your goal and risk comfort.