Index Fund vs ETF in India: Costs, Liquidity and Tax Explained

Same Benchmark, Two Different Wrappers

An index fund and an ETF are both passive products. Neither has a manager trying to beat the market. Both simply try to hold the same stocks, in the same weights, as a published benchmark such as the Nifty 50, the BSE Sensex, the Nifty Next 50 or the Nifty Bank. Because the goal is identical, the gross return before costs is almost the same. The difference is entirely in the wrapper, meaning how you buy it, when you get your price, and what frictions you pay along the way.

An index fund is a regular mutual fund unit. You buy it directly from the Asset Management Company or through a platform, you do not need a demat account, and you can start a SIP for as little as Rs 100 or Rs 500 depending on the scheme. You always transact at the net asset value (NAV) calculated after the market closes. You never see a live ticker, and you cannot place a limit order.

An ETF is a listed security. It has a trading symbol, it sits in your demat account, and it moves second by second on the NSE just like a share of Reliance or HDFC Bank. You buy and sell through a broker, you can place market or limit orders, and your fill depends on what other participants are quoting at that moment, not on the end of day NAV.

Index Funds Explained

A Nifty 50 index fund pools money from thousands of investors and holds all 50 Nifty constituents in their index weights, so roughly the same percentage in Reliance, HDFC Bank, ICICI Bank, Infosys and TCS as the index itself carries. When the index rebalances twice a year (NSE reviews it in March and September), the fund quietly adjusts its holdings to match. You do nothing.

The big appeal is the SIP, a Systematic Investment Plan. You set up an auto debit of, say, Rs 5,000 on the 5th of every month, and the AMC allots units at that day's NAV. You never time the market, you never watch a screen, and there is no brokerage on each purchase. Expense ratios on the cheapest direct plan Nifty 50 index funds in India are commonly in the 0.10% to 0.30% per year range, among the lowest cost equity products available to a retail investor.

The one cost to watch is the exit load. Many index funds charge around 0.25% if you redeem within 7 to 15 days, to discourage in and out trading. After that window there is no exit load. There is no STT on the purchase of a mutual fund unit, only on equity oriented redemptions, which is built into the process and small.

ETFs Explained

An ETF holds the same basket but issues units that list on the exchange. The oldest Indian equity ETF is Nippon India ETF Nifty 50 BeES, which trades under the symbol NIFTYBEES and launched back in 2001. Other large, liquid Nifty 50 ETFs include SBI Nifty 50 ETF (symbol SETFNIF50), ICICI Prudential Nifty 50 ETF and UTI Nifty 50 ETF. For the banking index there is Nippon India ETF Nifty Bank BeES and similar products. For gold exposure there are gold ETFs, and for debt there are liquid and G-Sec ETFs, but the comparison here focuses on equity index ETFs.

Because an ETF is a traded security, its market price can drift slightly above or below the true value of the underlying basket, called the iNAV or indicative NAV. Large institutions called Authorised Participants run an arbitrage that pulls the price back toward fair value, but in thinly traded ETFs the gap can widen, especially in the first and last few minutes of the session. This is the single biggest practical risk an ETF investor faces in India.

ETFs let you do things an index fund cannot. You can place a limit order to buy NIFTYBEES only if it dips to a level you like, you can sell instantly during a midday crash instead of waiting for the close, and you can build a lump sum position in seconds. The trade off is that you must manage liquidity, spread and order type yourself.

Head to Head Comparison

The table below sets out the practical differences. Notice that the tax treatment is the same for both, because under Indian law both a Nifty index fund and a Nifty ETF are equity oriented schemes (more than 65% in domestic equity), so they share one tax regime.

• Both are passive and aim to match the same index, so before costs the returns are nearly identical.
• The index fund hides all friction inside a single expense ratio, which is why beginners find it simpler.
• The ETF can be cheaper on expense ratio but adds brokerage, STT and spread, which only pay off if you hold large amounts or trade rarely.
• Liquidity matters far more for an ETF. A poorly traded ETF can cost you more in spread than you save in expense ratio.

Tax Rules After Budget 2024: The Numbers That Actually Apply Now

This is the part most older articles get wrong, so read it carefully. The Union Budget 2024 changed equity capital gains tax with effect from 23 July 2024. For both equity index funds and equity ETFs, the rules are now identical and as follows.

• Long Term Capital Gains (LTCG): units held for more than 12 months. Gains are taxed at 12.5% on the amount above a Rs 1.25 lakh exemption per financial year. The old 10% rate and the old Rs 1 lakh exemption no longer apply.
• Short Term Capital Gains (STCG): units held for 12 months or less. Gains are taxed at a flat 20%. The old 15% rate no longer applies.
• Securities Transaction Tax (STT): paid on the sale of an ETF on the exchange and on the redemption of an equity mutual fund unit. It is a small fraction of a percent and is deducted automatically.
• A 4% Health and Education Cess applies on the tax, and surcharge may apply at high income levels.

Because both products are equity oriented, there is no difference in capital gains tax between a Nifty index fund and a Nifty ETF. Anyone who tells you ETFs are more tax efficient on capital gains in India is repeating an old myth. The only tax nuance is dividends, which are taxed at your slab rate in both wrappers if the scheme pays them out, though most index funds and ETFs are growth oriented and reinvest internally.

A Fully Worked Example With Real Numbers

These numbers are illustrative and not a prediction of returns. Suppose you have Rs 5,00,000 to invest in the Nifty 50 and you want to compare buying the NIFTYBEES ETF versus a UTI Nifty 50 Index Fund. Assume NIFTYBEES quotes at a market price of Rs 250 per unit, which is roughly one tenth of the Nifty level, and you hold for 14 months, then sell after the Nifty has risen 15%.

ETF path. At Rs 250 you can buy 2,000 units, costing Rs 5,00,000. Say your discount broker charges a flat Rs 20 brokerage per order on both buy and sell, so Rs 40 round trip. On the buy you also pay a tiny bid ask spread. If the best ask is Rs 250.10 against an iNAV of Rs 250.00, that 4 paise per unit spread on 2,000 units is about Rs 200 of slippage. STT on the sell side of an equity ETF is small, on the order of Rs 50 on this size. After 14 months at 15% growth, your 2,000 units are worth about Rs 5,75,000, a gain of Rs 75,000.

Index fund path. The same Rs 5,00,000 buys units at the day end NAV with no brokerage and no spread. After 14 months at the same 15%, the value is about Rs 5,75,000, a gain of Rs 75,000. The expense ratio difference is real but tiny. If the ETF charges 0.05% and the index fund charges 0.20%, the extra cost on Rs 5 lakh over 14 months is roughly Rs 875, which the ETF roughly gives back through brokerage and spread on a single lump sum.

Now the tax, which is the same for both because the holding period is over 12 months. The gain of Rs 75,000 is long term. It sits below the Rs 1.25 lakh annual LTCG exemption, so if this is your only equity sale in the year, the LTCG tax is zero. If instead you had booked, say, Rs 2,00,000 of long term gains across all your equity sales that year, the taxable part would be Rs 2,00,000 minus Rs 1,25,000, which is Rs 75,000, taxed at 12.5% equals Rs 9,375 plus 4% cess of Rs 375, for a total of Rs 9,750. Had you sold inside 12 months instead, the entire Rs 75,000 would be short term and taxed at 20%, that is Rs 15,000 plus cess, a much heavier bill that rewards patience.

Tracking Error and Tracking Difference

Neither product perfectly mirrors its index. The gap between the fund's return and the index's return is called tracking error, and it comes from cash drag, the expense ratio, rebalancing costs and dividend timing. Across good Nifty 50 funds and ETFs this is usually small, but it is worth comparing the tracking error disclosed in the scheme documents rather than just the headline expense ratio.

ETFs carry one extra source of slippage that index funds do not: the gap between the ETF's traded price and its iNAV. In NIFTYBEES this gap is usually tiny because it is heavily traded, but in a small or niche ETF the gap can be larger than the entire expense ratio you were trying to save. Always check the ETF's average daily traded volume and the live spread before buying, especially near the open and the close.

• For an index fund, judge it by tracking error and expense ratio, nothing else to manage.
• For an ETF, judge it by tracking error, expense ratio, daily volume and the live bid ask spread.
• Prefer ETFs with high average daily volume so your order does not move the price.
• Avoid placing market orders in an ETF in the first and last five minutes, when spreads are widest.

Common Mistakes Indian Investors Make

The most expensive mistake is buying a thinly traded ETF to save 0.10% on the expense ratio, then losing 0.50% or more on a wide spread every time you trade. The expense ratio is paid slowly over a year, but the spread is paid in full on every single trade. For a buy and hold investor with monthly contributions, a plain index fund is usually the better deal precisely because it has no spread and no per buy brokerage.

A second mistake is treating an ETF like a trading instrument and churning it. Every round trip in an ETF triggers brokerage, STT and spread, and if you sell within 12 months you also hand over 20% short term capital gains tax instead of the 12.5% long term rate. The whole point of a passive index product is to hold it, not to trade it.

A third mistake is ignoring the difference between direct and regular plans in index funds. A regular plan pays a commission to a distributor and can cost 0.5% to 1% more per year than the direct plan of the very same fund. Over ten years that gap compounds into a meaningful amount. Always choose the direct plan if you are comfortable investing without an intermediary.

SEBI Oversight and Investor Protection

Both index funds and ETFs are regulated by the Securities and Exchange Board of India (SEBI) under the Mutual Funds Regulations. SEBI requires daily NAV disclosure, monthly portfolio disclosure, a cap on total expense ratio, and clear labelling of the scheme's risk through the riskometer. For ETFs, SEBI has also pushed AMCs to publish live iNAV and to maintain market makers so that on screen liquidity stays reasonable.

Your units, whether held in a folio or in demat, are held in trust and are ring fenced from the AMC's own balance sheet, so the failure of the fund house does not put your holdings at risk in the way an unregulated product might. This regulatory floor is one reason index funds and ETFs are considered suitable core holdings for most retail portfolios.

Which One Should You Pick?

If you invest a fixed amount every month, do not have or want a demat account, and prefer to never look at a live price, the index fund is almost always the right tool. The SIP automation, the absence of per buy costs, and the simplicity outweigh the slightly higher expense ratio. This describes most long term Indian retail investors building a Nifty 50 core.

If you already trade, hold a demat account, want to deploy a lump sum at a specific intraday level, and you understand how to read a spread and check daily volume, the ETF gives you precision and a marginally lower expense ratio. It also suits investors who want to park surplus cash quickly into the market and pull it out the same day if needed. Just stick to large, liquid names like NIFTYBEES, SETFNIF50 or large bank ETFs, and avoid obscure low volume products.

For many investors the honest answer is that the choice barely matters compared to two things that matter far more: keeping costs low by choosing direct plans and liquid ETFs, and holding for more than 12 months so your gains are taxed at the lower long term rate of 12.5% rather than the short term 20%.

Sources and Further Reading

For authoritative data and current rules, refer to AMFI, the Income Tax Department and SEBI Investor Education. Tax rates, expense ratios, exit loads and ETF liquidity change over time, so always confirm the current numbers and the specific scheme document on the official source before you invest. Nothing here is investment advice or a guarantee of returns.

Sources and Further Reading

For authoritative data and further reading on this topic, refer to AMFI, Income Tax Department and SEBI Investor Education. Always confirm current rules, rates and contract specifications on the official source before you trade.