An index fund buys the same stocks, in the same proportions, as a market index such as the Nifty 50 or Sensex. There is no stock picking; the fund simply tracks the index. Because it needs no research team, an index fund usually has a lower expense ratio than an actively managed fund of the same type.
The result is a return close to the index, minus costs and a small tracking difference. Index funds can form the core of a long-term portfolio, often alongside a few active funds. Exchange-traded funds track indices too, but trade on the stock exchange and need a demat account, whereas index funds are bought and redeemed through the fund house like any other mutual fund.
Who it suits
- Long-term investors who value low cost
- Those who prefer a simple, rules-based approach
- A core holding alongside active funds
How Index Funds works
- 1
Pick the index
Decide which part of the market you want, for example the top 50 or top 100 companies.
- 2
Compare funds on the same index
Look at expense ratio and tracking error, since the portfolio is otherwise the same.
- 3
Invest by SIP or lumpsum
Index funds work well with long-running SIPs.
- 4
Hold for the long term
Returns follow the index, so patience matters more than switching.
Why families choose it
Low cost
Lower expense ratios leave more of the index's return in your hands over time.
No fund manager risk
You avoid the chance of a manager's stock choices lagging the market.
Transparent
You always know what the fund holds, because it mirrors the index.
Simple core holding
A broad-market index fund can anchor a portfolio built for decades.
Things to know, and risks
- Index funds fall as much as the index they track; there is no attempt to protect the downside.
- Tracking error means returns can differ slightly from the index.
- Narrow, sectoral or factor indices can be far more volatile than broad market indices.
- An index fund will never beat its index, since its aim is to match it.
Tax treatment
Equity index funds are taxed like other equity-oriented funds: 20% on gains within 12 months, and 12.5% on gains above ₹1.25 lakh a year after 12 months. Index funds tracking debt or international indices are taxed differently. Tax rules change, so confirm with your tax professional.
For families in Tirupati
Professors, doctors and engineers in Tirupati often read about index investing and ask whether they should use it. For many, a broad-market index fund makes a sensible core, with some active funds around it. Some families in the district also hold several overlapping large-cap funds; replacing part of that with one index fund can simplify the portfolio without changing the underlying exposure much.
Run the numbers
CAGR Calculator
If an investment grew from one value to another over several years, what steady yearly rate would produce the same result? That is CAGR. This calculator gives you the CAGR, the absolute return and the rupee gain, so you can compare a mutual fund, a property or an old policy on an equal, per-year basis.
Frequently asked questions
What is the difference between an index fund and an ETF?
Both track an index, but an ETF trades on the stock exchange and needs a demat account, while an index fund is bought directly from the fund house at the day's NAV. Index funds are easier for SIPs; ETFs can be traded during market hours.
Are index funds better than active funds?
Neither is always better. Index funds offer low cost and market-matching returns, while active funds try to beat the index and may or may not succeed. Many investors combine both, using index funds as the core.
What is tracking error in an index fund?
Tracking error measures how closely a fund's returns follow its index. Lower is better. It arises from expenses, cash holdings and the timing of changes to the index. Compare it when choosing between funds on the same index.
Why do regular plans have a higher expense ratio than direct plans?
Regular plans include the distributor's commission in the expense ratio, which pays for ongoing service such as paperwork, reviews and help with redemptions. Direct plans have no distributor and a lower expense ratio. As a distributor, we service regular plans.
Can I start an index fund SIP with a small amount?
Yes, many index funds accept SIPs from ₹500 a month. Because costs are low and the strategy is simple, an index fund SIP is a practical starting point for new investors with a long horizon.
Mutual Fund investments are subject to market risks, read all scheme related documents carefully. This page is for general information and is not a recommendation to buy any specific product.
Last reviewed 12 Oct 2026.