What is SIP (Systematic Investment Plan)?

5 min readLast updated: June 2026

What is SIP?

SIP, or Systematic Investment Plan, is a method of investing a fixed amount of money in a mutual fund at regular intervals — typically every month. Instead of putting in a large sum all at once (called a lump sum), SIP lets you invest small amounts consistently over a long period.

For example, investing just Rs 5,000 every month for 10 years in an equity mutual fund could grow to over Rs 11 lakhs at a 12% annual return. Over 20 years, that same Rs 5,000/month could become Rs 49 lakhs. The longer you stay invested, the more powerfully compounding works in your favour.

How Does SIP Work?

Every month on your chosen SIP date, your bank account is automatically debited for the fixed amount. This money is used to buy units of your chosen mutual fund at the current NAV (Net Asset Value — the price of one unit of the fund that day).

Over time, markets go up and down. When markets fall, the same Rs 5,000 buys more units (because units are cheaper). When markets rise, you buy fewer units. This automatic process is called rupee cost averaging — it means you never accidentally invest everything at a market peak.

The Power of Compounding in SIP

Compounding means your returns also earn returns. In a SIP, the units you buy each month generate returns, and those returns buy more units, which generate more returns — and so on. This snowball effect is most powerful over long time horizons.

A Rs 5,000/month SIP at 12% annual return: after 10 years = Rs 11.6 lakhs (total invested: Rs 6 lakhs). After 20 years = Rs 49.5 lakhs (total invested: Rs 12 lakhs). After 30 years = Rs 1.76 crore (total invested: Rs 18 lakhs). Your returns are nearly 10x your invested amount over 30 years.

Who Should Start a SIP?

SIP is ideal for salaried professionals who receive a regular monthly income and want to invest a portion of it automatically without timing the market. It is equally suited for young investors who are just starting out with small amounts — even Rs 500/month is a valid SIP.

If you have a financial goal — buying a house, funding education, building a retirement corpus — SIP is the most disciplined and low-stress way to reach it. You do not need to watch the market. You do not need to time your entry.

Common SIP Myths — Busted

"You need a large amount to start SIP" — False. Most mutual funds allow SIPs starting from Rs 100 or Rs 500 per month.

"SIP guarantees returns" — False. SIP is a method of investing in mutual funds, which are market-linked. Returns are not guaranteed. However, historically, long-term equity SIPs have delivered 10-15% CAGR over 10+ year periods.

"You cannot stop or change your SIP" — False. You can pause, modify, or stop your SIP at any time with no penalty, through your fund house app or platform.