What is the 15 * 15 * 15 rule?

The Power of the 15 × 15 × 15 Rule in Wealth Building

If you've ever wondered how small, consistent investments can grow into something substantial, the 15 × 15 × 15 rule offers a compelling answer. This simple rule of thumb suggests that by investing Rs 15,000 every month through a Systematic Investment Plan (SIP) for 15 years, and earning an average annual return of 15%, you could accumulate a corpus of Rs 1 crore.

On the surface, it’s a neat mental shortcut, but it also underscores the magic of compounding. Over time, your money doesn’t just grow linearly—it accelerates. The early years may seem slow, but as returns start generating their own returns, the growth curve steepens, especially in equities where long-term averages have historically hovered around 12–15% in markets like India.

Of course, the 15% return isn’t guaranteed—it’s an assumption based on past performance of equity funds, not a promise. Market fluctuations, inflation, and fund selection all play a role. But the real power of the rule lies not in the exact numbers, but in the discipline it encourages. Investing Rs 15,000 monthly requires consistency and patience, two qualities often missing in personal finance.

For someone starting young, this strategy can be transformative. It’s not about getting rich overnight—it’s about staying the course. Even if returns dip slightly or life throws a financial curveball, the habit of regular investing builds financial resilience.

So while the 15 × 15 × 15 rule isn’t a guaranteed roadmap, it's a motivating milestone. It shows that with time, discipline, and a smart approach, reaching a crore isn’t just possible—it’s within reach for many.