For young earners and salaried professionals, the real question is always the same: how do you build a large corpus starting from a modest monthly amount? That very ambition has pushed mutual fund SIPs into the mainstream in India, and one simple piece of arithmetic now doing the rounds is the 15x15x15 formula. Many financial experts see it as a straightforward path to becoming a crorepati over the long run, precisely because it leans on discipline and time rather than any clever trick.
What the three 15s actually mean
According to TrendKia's analysis, each 15 in the formula carries its own distinct meaning. The first 15 tells the investor to put in a SIP of 15,000 rupees every single month. The second 15 points to the expected return, an average of 15 percent a year. And the third 15 signals that this routine must continue without interruption for a full 15 years. Only when all three conditions come together does the strategy deliver its real punch. The formula is built mainly around equity mutual funds, where there is greater scope for healthy returns over a longer horizon.
27 lakh invested, a 1 crore corpus
Let the numbers do the talking. If a person sets aside 15,000 rupees each month for the entire 15 years, the total amount leaving their pocket works out to roughly 27 lakh rupees. But if that money keeps earning an average of 15 percent annually, the sum could swell to about 1 crore rupees by the time it matures. In other words, the final fund ends up many times larger than the actual money invested.
The real magic is compounding
The most important player in this entire calculation is compounding. In the first few years the growth may feel slow, almost as if the money is barely moving. As the years roll on, however, returns start earning returns of their own, and the pace of growth picks up sharply. That is exactly why the earlier you start and the longer you stay invested, the bigger the compounding benefit becomes. One thing must always be kept in mind though: the return depends entirely on how the market performs, and there is no guarantee attached to it.
Why SIP is winning over middle-class families
The biggest appeal of a SIP is that the investor never has to sweat over timing the market. They simply put in a fixed amount month after month, and the ups and downs of the market automatically hand them the benefit of averaging out their cost. Alongside this, the approach builds an investing habit and helps maintain financial discipline. That is why even those who begin with small amounts manage to create a sizeable corpus over time, and SIPs are now spreading quickly among middle-class households.
Keep these points in mind before you invest
Experts are clear that no one should treat a 15 percent return as a fixed certainty while making investment decisions. The performance of the stock market and equity funds keeps shifting from time to time. Every investor should therefore move ahead only after weighing their own risk appetite, financial goals and investment horizon. There is one more crucial point: panicking over a temporary market dip and halting your investments can prove costly. Staying invested patiently for the long haul is the true condition for this strategy to succeed. With sound planning and steady, regular investing, even an ordinary investor can build a substantial fund for the future.
