What is the 15-15-15 Rule? Smart Mutual Fund Strategy Explained
Author Updated on Oct 30, 2025
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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Shivalik SF Bank
Investment amount
₹1,00,000
Compounding
Quarterly
- FD rate applicable
- 7.8%
- FD tenure
- 1Y 10M
- Maturity amount
- ₹0
- Interest earned
₹0

