Turning 30 often comes with a quiet realisation: the future isn’t as distant as it once felt. Whether it’s a child’s education, a first home or early retirement, the next 15 years will decide a lot and that’s exactly why many young earners begin looking for a serious wealth-building plan. For anyone hoping to build Rs 1 crore by the age of 45, a Systematic Investment Plan (SIP) in equity mutual funds remains one of the most practical and proven routes. It doesn’t require massive lump-sum money, just discipline, patience and clarity on how much to invest.

At its core, an SIP is just a fixed monthly investment into a mutual fund. But two forces quietly work in your favour:

1. Rupee-cost averaging:

Markets rise and fall, but your SIP buys units at every level. When markets dip, you automatically pick up more units at lower prices – a major advantage over timing the market.

This is the real game-changer. Your past returns start generating more returns, and over long horizons, even a modest monthly SIP can snowball into a surprisingly large fund.

If you have a 15-year investment window, here’s the clean, practical calculation.

Assuming an average annual return of 12% (reasonable for diversified equity funds)

You need a monthly SIP of around Rs 25,000.

• Total investment over 15 years: ≈ Rs 45 lakh
• Estimated value at 12 per cent: ≈ Rs 1.2 crore

The gap roughly Rs 75 lakh comes purely from compounding.

If returns come in a little lower, say 10 per cent, the corpus would be smaller and the SIP amount would need a slight adjustment. But 12 per cent is a fair and historically grounded assumption for long-term equity investing.

SIPs don’t eliminate risk – markets can be choppy. But starting at 30 gives you time to ride through volatility.

• Keep 70–80 per cent of your allocation in equities at age 30
• Gradually reduce to 50–60 per cent as you move closer to 45
• Never stop SIPs during market downturns – that’s when you accumulate the most units

Diversifying across 2–3 strong funds (large-cap, flexi-cap, ELSS) ensures you’re not dependent on a single segment of the market.

Forget complicated strategies. A practical setup for a working 30-year-old looks like this:

• Complete KYC online (Aadhaar/PAN).
• Use your bank or any reputable mutual fund platform.
• Select monthly auto-debit – Rs 25,000 can be split across 2–3 funds.
• Review twice a year, not every week.
• Hold for at least 12–15 years to let compounding work.

Most importantly: Build an emergency fund (6 months of expenses) separately so you never break your SIPs midway.

If you’re earning Rs 75,000 to Rs 1 lakh per month, this is achievable with some budgeting. If not, start smaller – even a Rs 10,000 SIP now, increased by 10 per cent a year, can take you remarkably close.

The key is consistency, not perfection.