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What is the 15-15-15 Rule? Smart Mutual Fund Strategy Explained

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Ajeeta Bhatia

Author Updated on Oct 30, 2025

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Building wealth may seem complicated, but sometimes simplest strategies can yield the most powerful results. The 15-15-15 rule is one such popular investment concept among mutual fund investors. Invest ₹15,000 each month for 15 years, aiming for 15% annual returns. Rooted in the power of compounding, this rule highlights how consistent, disciplined investing can turn small monthly contributions into a substantial financial corpus. Continue reading to learn about the 15-15-15 rule of mutual fund in detail.

What is the 15-15-15 Rule?

The 15-15-15 rule is a simple investment strategy for mutual fund investors looking to build a Rs 1 crore goal corpus. By investing Rs 15,000 monthly for 15 years at a projected annual return of 15%, this strategy takes use of compounding to accumulate large wealth over time.

What is Compounding in Mutual Funds?

Compounding, in the context of mutual fund investments, refers to a phenomenon that causes little amounts to increase into large sums over time. In other words, the returns you make during one compounding period will be reinvested in the following compounding period, and so on.

How Does the Power of Compounding in the 15-15-15 Rule Work?

The 15-15-15 rule focuses on investing in values of 15s. The 15-15-15 rule requires mutual fund clients to invest ₹15000 in a monthly SIP at a 15% interest rate for 15 years. At the end of the period, the expected revenue is around ₹1 crore.

Compounding works when you invest for another 15 years at the same rate and SIP. This might result in an exponential gain of around ₹10 crore. The plan is to keep invested for another 15 years if you do not expect to achieve significantly larger profits. But, because it is a long-term investment, begin investing as soon as feasible.

Also, keep in mind that, despite the 15% interest rate, your investment could yield a 20% return one year and -6% the next due to market swings. 15% is the estimated interest rate for the entire investment period.

Benefits of 15-15-15 Rule 

Here are some of the benefits of 15-15-15 rules in mutual fund:

Compounding-

In the case of mutual funds, compounding implies adding the interest earned each year to the principal and calculating the interest for the following year on this larger sum. This snowball effect has the potential to result in significant wealth accumulation, particularly when investments are made consistently over time.

Inflation beating power-

Investing in higher-yielding mutual funds can help combat the eroding impacts of inflation. For example, with a 6% inflation rate, the value of Rs 1,000 now will fall to Rs 174.11 after 20 years. However, if the same cash is invested in a mutual fund with a 15% annual return, it will rise to Rs 16,366 in the same time frame, thus preserving and increasing purchasing power.

Estimate Target Corpus

Consider your monthly investment amount, estimated yearly return rate, and investment term when estimating the corpus you can accumulate utilizing the 15-15-15 formula. Financial calculators and speaking with financial experts can provide unique insights, allowing you to tailor your investing approach to specific financial goals.

Achieve long-term goals-

The 15-15-15 rule can help investors reach their long-term financial goals. For example, if a person earning Rs 50,000 per month puts Rs 7,500 per month (15% of their salary) in a mutual fund with a 15% annual return, they may save almost Rs 57.65 lakh over 15 years. This systematic approach to investing can help substantially with wealth growth. 

Conclusion

The 15-15-15 rule of mutual funds is a practical and effective investment approach for individuals aiming to build long-term wealth. It encourages financial discipline, harnesses the benefits of compounding, and helps investors stay committed to their financial goals. While returns may fluctuate, the key lies in consistent investing and a long-term horizon — essential ingredients for creating lasting financial success.

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Disclaimer : Mutual fund investments are subject to market risks, read all scheme related documents carefully. Past Performance of the Scheme is neither an indicator nor a guarantee of future performance.

Disclaimer : FDs and Co-branded Credit Cards are not regulated by SEBI and are outside the SCORES/Exchange Arbitration framework. Stable Money acts only as a distributor.


The proof writes itself Trusted by 50 lakh+ customers

© 2026 Stable-Alpha Technologies Pvt. Ltd.

ISO 27001:2022

Address - Third floor, Block A, Stable Money, Bhive HSR Premium Campus, Krishna Reddy Industrial Area, Kudlu gate, Bommanahalli, Bangalore, Karnataka, India, 560068

Disclaimers : FDs and Co-branded Credit Cards are not regulated by SEBI and are outside the SCORES/Exchange Arbitration framework. Stable Money acts only as a distributor.

Mutual Fund Distributor: Stable Finserv Private Limited (AMFI-registered Mutual Fund Distributor) | ARN: 269315 | Current Validity till 17-May-2029 | Scheme Documents| Commission Disclosure

Disclaimer: Mutual fund investments are subject to market risks, read all scheme related documents carefully. Past Performance of the Scheme is neither an indicator nor a guarantee of future performance.

STABLE FINSERV PRIVATE LIMITED (CIN: U66309KA2023PTC172771)

Registered Address: Third floor, Block A, Stable Money, Bhive HSR Premium Campus, Krishna Reddy Industrial Area, Kudlu gate,
Bommanahalli, Bangalore, Karnataka, India, 560068

Research Analyst: SEBI Registration Number: INH000024912 | BSE Enlisting Number: 6952


Disclaimer: Registration granted by SEBI, enlistment with BSE and certification from NISM in no way guarantee performance of the intermediary or provide any assurance of returns to investors.