How SIP Works: Systematic Investing Explained
Learn how monthly SIP investments compound over time, and how step-up SIPs can meaningfully grow your wealth.
A Systematic Investment Plan (SIP) lets you invest a fixed amount in a mutual fund every month instead of investing a lump sum at once. It's one of the most popular ways to build long-term wealth in India because it combines discipline, compounding and rupee-cost averaging.
How SIP returns are calculated
Each monthly contribution grows for a different length of time — the first installment compounds for the full duration, while the last barely compounds at all. The future value of a SIP is calculated as an annuity: contributions made at the start of each month, compounding at the expected monthly rate of return, summed across the full tenure.
Rupee-cost averaging
Because you invest the same amount every month regardless of market levels, you automatically buy more units when prices are low and fewer when prices are high. Over time, this averages out your purchase cost and reduces the impact of short-term market volatility compared to investing a lump sum at a single point.
What is a step-up SIP?
A step-up (or top-up) SIP increases your monthly contribution by a fixed percentage every year — matching the natural growth in your income. Even a modest 10% annual step-up can significantly increase your final corpus compared to a flat SIP of the same starting amount.
SIP is a method, not a product
SIP is simply a way of investing — it doesn't guarantee returns, and actual performance depends on the underlying mutual fund and market conditions. Use a SIP calculator to set realistic expectations, but always align fund selection with your risk appetite and goals.