Guide

What Is a SIP? A Plain-English Guide

A Systematic Investment Plan is simply investing a fixed amount at regular intervals. The idea is plain; the consequences are powerful.

SIP Calculator Hub · Reviewed June 2026

How a SIP actually works

A SIP automates a fixed contribution — say ₹10,000 — into a mutual fund on a set date each month. The amount is debited from your bank account and used to buy units at whatever the fund's net asset value (NAV) is that day.

Because the NAV moves, your fixed rupee amount buys more units when prices are low and fewer when prices are high. Over time this averages out your purchase price — a mechanism called rupee-cost averaging.

Why discipline beats timing

The biggest practical advantage of a SIP isn't mathematical — it's behavioural. By automating the investment, you remove the temptation to time the market, which even professionals do poorly. You invest through the scary months as well as the euphoric ones.

This matters because the market's best days often cluster near its worst. Investors who jump out to avoid declines frequently miss the rebounds, and that gap compounds badly over decades.

What a SIP does not do

A SIP does not guarantee returns. It's a way of investing, not an investment itself — the underlying fund still rises and falls with the market.

It also doesn't eliminate risk; it spreads your entry point over time, which reduces timing risk but not market risk. And it won't rescue a poor fund choice. Picking an appropriate fund matters as much as the SIP discipline itself.