If you want passive exposure to an index in India, choose between an index mutual fund and an ETF by looking first at how you will buy and hold it. Index mutual funds transact at the scheme’s applicable end-of-day NAV; ETFs trade on an exchange during market hours at prevailing market prices. A mutual fund may be simpler if you do not want to manage exchange orders. An ETF may suit you if you already have a demat and trading account and value intraday execution. Neither format guarantees better returns: compare products tracking the same index on costs, tracking and, for ETFs, liquidity and execution.
What is the difference between an index mutual fund and an ETF?
Both are fund structures that can track a market index. SEBI describes an index fund as holding all or most of the securities in its target index in corresponding proportions. Actual portfolio returns can differ from the index because of expenses, cash holdings and other operational factors.
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The main practical difference is how you transact. An index mutual fund is a mutual-fund scheme: you buy or redeem units at the applicable NAV. NSE explains that traditional mutual-fund units are purchased at the NAV published at the end of each trading day. An ETF is listed on an exchange; its price changes as units trade, and your order executes at the market price available when it is filled. NSE explains the NAV-based mutual-fund transaction, while SEBI’s ETF explainer covers exchange trading and price movement.
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| Feature | Index mutual fund | ETF |
|---|---|---|
| How you transact | Buy or redeem through a mutual-fund route at the applicable scheme NAV. | Place an exchange order during the trading session; execution is at the market price available when the order fills. |
| Price reference | Applicable NAV, calculated for the scheme; NSE says the traditional mutual-fund NAV is published at the end of each trading day. | Market price during trading; it can differ from NAV or indicative NAV. |
| Holding requirement | Mutual-fund units are held through the mutual-fund account or platform used for the investment. | ETF units are held in demat mode, according to AMFI. |
| Execution considerations | No exchange order or bid–ask spread to manage for the scheme transaction. | Order type, liquidity, bid–ask spread and possible price deviation from NAV/iNAV affect execution. |
| Additional account costs | Check applicable platform and scheme terms. | Brokerage and possible demat charges can add to the cost. |
ETF units trade on an exchange, but that does not mean every ETF has deep liquidity or that every order will execute close to NAV. SEBI also notes that ETF units cannot be bought or sold fractionally. See AMFI’s ETF information for the demat requirement and SEBI’s ETF guidance for trading considerations.
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Which format fits your investing workflow?
An index mutual fund may fit if you prefer NAV-based transactions
Consider an index mutual fund if you want to invest through a mutual-fund platform and would rather not place exchange orders or monitor their execution. This can be a straightforward route for recurring contributions, but confirm the scheme’s current purchase facilities, minimums and platform terms; those details vary and are not established by the fund label alone.
An ETF may fit if you already use a demat and trading account
An ETF gives you exchange execution during the session. That can be useful if you want to choose an order price or transact intraday, but you must consider the live market price, available liquidity and trading costs. You also need demat holding; if you do not already have a suitable account, include the account setup and ongoing charges in your comparison.
How to compare two funds that track an index
- Match the benchmark. Confirm that both candidates track the same index, and check the scheme mandate and replication approach. Similar names do not guarantee the same benchmark or portfolio exposure.
- Compare the same option and period. Use the same distribution option where available and compare disclosures over equivalent periods. This avoids mixing unlike return figures.
- Check the current total expense ratio. TER covers a scheme’s operating and management costs. AMFI says TER disclosures are required daily on AMC and AMFI websites, so use current disclosures rather than an old article or a category average. AMFI explains TER.
- Review realized tracking. SEBI defines tracking error as the standard deviation of the difference between portfolio and benchmark returns over a period. Tracking difference shows the return gap over the stated period or as defined in the scheme disclosure. Compare the same benchmark and time period; a lower TER alone does not establish closer tracking. See SEBI’s tracking-error explanation and NSE’s ETF tracking-error information.
- For an ETF, inspect execution conditions. Look at current exchange volume, bid–ask spread and any published market-price comparison with NAV or iNAV. Consider using a limit order if you want to set a maximum buying price or minimum selling price; it may not execute if the market does not reach that price. Do not assume an exchange listing guarantees easy trading.
- Add transaction and account costs. Include brokerage and any demat charges for an ETF, as well as relevant platform or account charges for either route. Compare the costs that apply to your own provider and use.
- Check the practical contribution route. If you plan to invest regularly, verify current scheme and platform facilities, transaction cut-offs and minimums directly. The format alone does not establish that a particular SIP facility or minimum is available.
- Determine tax treatment from the product classification. Check whether the specific scheme is equity-oriented or another category, your holding period and the current tax rules. The ETF or index-fund label by itself does not settle tax treatment.
Why TER is not the whole cost comparison
TER is an important scheme-level cost, but it does not capture every cost an investor may face. For an ETF, brokerage and demat charges may apply, and the bid–ask spread or a market price away from NAV can affect the effective purchase or sale price. For a mutual fund, review the current scheme and platform terms. The relevant comparison is the total cost of the route you will actually use, not just which product displays the lower TER.
How tracking error and tracking difference help
Tracking error describes how variable the gap is between a fund’s returns and its benchmark’s returns over the stated period. Tracking difference indicates the realized return gap for a particular period, as disclosed. They answer related but distinct questions: whether deviations vary, and how far performance ended up from the index. Read each scheme’s latest disclosures and compare like with like. A low fee is not proof of low tracking error or a small tracking difference.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.How Indian tax treatment affects the choice
Tax depends on the fund’s statutory classification, the holding period, the transaction conditions and the investor’s circumstances—not simply on whether the product is an ETF or an index mutual fund. For the specified section 112A category of equity shares or units of equity-oriented funds, the Income Tax Department’s AY 2026–27 material states a 20% short-term capital-gains rate and a 12.5% long-term rate, subject to the specified STT conditions. The same guidance identifies a 12-month holding period for listed securities and units of equity-oriented mutual funds in the relevant capital-gains context. These figures are not universal rates or holding periods for every index fund or ETF. Check the current law and the classification of the particular scheme; consult a tax professional for advice on your situation. See the Income Tax Department’s official portal.
Quick Recap
A practical decision rule
- Lean toward an index mutual fund if NAV-based mutual-fund transactions suit you and you prefer not to manage exchange execution.
- Lean toward an ETF if you already have a suitable demat and trading account, want intraday exchange execution and are willing to check liquidity, spreads and order prices.
- For either format, compare the same benchmark, current TER, tracking disclosures, account costs and the product’s tax classification before deciding.
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