Home/Blog/How to Build a ₹1 Crore Portfolio with SIP (The 15-15-15 Rule & Step-Up Compounding)
Business & Billing5 min read•Personal Finance & Wealth Desk•Sep 10, 2026

How to Build a ₹1 Crore Portfolio with SIP (The 15-15-15 Rule & Step-Up Compounding)

Discover how Systematic Investment Plans (SIP) generate exponential wealth over time. Learn the golden 15-15-15 mutual fund rule, compare flat vs Step-Up SIPs, and plan your retirement roadmap.

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The Magic of Compounding in Mutual Fund SIPs

A **Systematic Investment Plan (SIP)** allows retail investors to invest a fixed amount into equity mutual funds on a disciplined monthly basis. Instead of trying to time the market, SIP leverages **Rupee Cost Averaging**—buying more units during market dips and fewer units during market peaks.

Over long horizons (10 to 25 years), the mathematical compounding of reinvested capital gains creates tremendous wealth generation.

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The Famous 15-15-15 Rule of Wealth Creation

The **15-15-15 rule** is a foundational personal finance benchmark in equity investing:

- **Invest ₹15,000 every month** - **For a duration of 15 years** - **At an expected CAGR return of 15% per annum**

#### The Outcome: - **Total Amount Invested:** ₹27 Lakhs - **Total Interest & Capital Gain:** ₹73 Lakhs - **Total Final Corpus:** **₹1 Crore (₹10,027,601)**!

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Flat SIP vs Step-Up SIP: Why 10% Annual Increment Wins

As your salary and business earnings grow each year, your monthly investment should also increase. A **Step-Up SIP (Top-Up SIP)** increases your monthly SIP contribution by a fixed percentage (typically 10%) every 12 months.

Here is a 20-year performance comparison starting with **₹10,000/month at 12% CAGR**:

| Investment Strategy | Total Invested (20 Yrs) | Total Final Corpus | Net Wealth Gain | | :--- | :--- | :--- | :--- | | **Flat Monthly SIP (₹10k/mo)** | ₹24.00 Lakhs | **₹99.91 Lakhs** (~₹1 Cr) | +₹75.91 Lakhs | | **5% Annual Step-Up SIP** | ₹39.67 Lakhs | **₹1.51 Crores** | +₹1.11 Crores | | **10% Annual Step-Up SIP** | **₹68.70 Lakhs** | **₹2.25 Crores** | **+₹1.56 Crores** |

*By simply stepping up your investment by 10% each year, your final retirement wealth more than doubles from ₹1 Crore to ₹2.25 Crores!*

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Step-by-Step Guide to Calculating Your SIP Returns

1. Open the **[DocuDev SIP & Wealth Calculator](https://www.docudev.site/tools/sip-calculator)**. 2. Select your desired mode (**Monthly SIP**, **Step-Up SIP**, or **Target Goal**). 3. Input your monthly budget, expected annual return rate (12% for Nifty 50 Index funds, 15% for Diversified Flexicap funds), and investment horizon in years. 4. Toggle the **Inflation Adjuster** to preview the real purchasing power of your money in today's terms. 5. Click **Download Plan PDF** to export a professional, printable investment roadmap.

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