Index Funds and ETFs for NRIs: The Cost-Drag Maths, the NSE Liquidity Catch, and the PFIC Trap That Should Stop US and Canada Investors Cold

A reader in New Jersey put Rs 30 lakh into three Indian Nifty 50 index funds over four years, proud that he was getting India exposure at a 0.2% expense ratio while his American friends paid 0.6% for the same index through a US ETF. He was right about the expense ratio and wrong about almost everything that mattered. Each of those funds is a Passive Foreign Investment Company in American eyes, so he owes a Form 8621 per fund every year, his long-term gains will be taxed at his top ordinary rate rather than the 12.5% Indian equity rate, and an interest charge has been quietly accruing on the deferred tax since the day he bought. The cheaper-looking fund is the more expensive holding by a wide margin. This guide is about which index product an NRI should actually own, and the answer turns entirely on which passport you carry.

The 30-second answer: NRIs can buy Indian index funds and ETFs (Nifty 50, Sensex, Nifty Next 50, Nifty Bank) through an NRE or NRO account; index funds need no demat, ETFs need an NRI demat and trading account. An equity ETF is taxed like an equity fund: 12.5% long-term above Rs 1.25 lakh, 20% short-term, for transfers on or after 23 July 2024. On cost, total drag is expense ratio plus tracking error, not the headline TER alone, and Indian Nifty funds run 0.02% to 0.30% all-in. The decisive point is home-country tax: a US resident faces the PFIC regime (Form 8621, ordinary rates, an interest charge) and a Canadian resident faces harsh foreign-fund tax, so both should hold a US-domiciled India ETF (INDA, FLIN, EPI) or a GIFT City structure instead. UK and UAE NRIs can simply buy the Indian fund.

This guide assumes you already know the NRE versus NRO distinction and broadly how an NRI buys Indian mutual funds; if not, start with the mutual fund eligibility guide. What follows is the part that decides real returns: how to read the true cost of an index product rather than the headline expense ratio, when an ETF on the NSE actually trades well enough to use, the equity-versus-other tax split that catches people on gold and international ETFs, and the single largest fork in the road, the PFIC trap that should change what a US or Canada NRI buys entirely.

Why an index fund, and why the passive case is stronger for an NRI than a resident

The passive case in India is the same one made everywhere: most active funds fail to beat their benchmark after fees over a decade, and you cannot reliably pick the few that will in advance. The large-cap space is where this bites hardest, because the Nifty 50 and Sensex are so heavily researched that a manager's edge is thin and the fee gap is wide. A resident reading this knows the argument already. What is different for you is that two of the active manager's traditional advantages, the ability to chase the next theme and the comfort of a human at the wheel, are worth even less when you are eight time zones away and cannot babysit a portfolio. A rules-based index holding that you fund by standing instruction and ignore is a better fit for an absentee owner than a fund you feel obliged to monitor.

The mechanics for an NRI are straightforward and worth stating precisely because people overcomplicate them. An index fund is an open-ended mutual fund scheme. You buy it directly from the asset management company at the day's NAV, through your NRE or NRO bank account, with no demat account and no Portfolio Investment Scheme (PIS) approval required. An ETF is a listed security. You buy and sell it on the NSE or BSE at live prices, which means you need an NRI demat and trading account, and NRE-funded purchases route through the PIS framework that the buying Indian stocks guide covers in detail. One regulatory limit to note: an NRI may hold equity, debt and gold ETFs, but not currency or commodity ETFs. That rules out, for instance, a crude-oil or a rupee-pair ETF, but leaves every Nifty, Sensex and sector-index product open to you.

Read the total cost, not the expense ratio on the brochure

Here is the number that surprises people: two funds tracking the identical Nifty 50, both advertising a 0.2% expense ratio, can deliver returns that differ by 0.3% or more a year. The expense ratio is only one of three drags, and on a cheap index fund it is often not the largest. The figure that captures all of them is tracking error, the gap between what the index did and what the fund actually returned.

Three things open that gap. The first is the expense ratio (TER) itself, deducted daily from NAV. On Indian Nifty 50 products the direct-plan TER now spans a wide range: the ICICI Prudential Nifty 50 ETF sat at 0.02% as of June 5, 2026, while the Tata Nifty 50 Index Fund was at 0.19% as of April 30, 2026, and the UTI Nifty 50 Index Fund at 0.26% as of May 22, 2026. That is a tenfold spread on the same index, and paying 0.26% for a Nifty 50 fund when 0.05% versions exist is simply lighting money on fire over a holding period measured in decades.

The second drag is cash drag. An index fund must keep a slice of assets in cash to meet redemptions, and cash earning the overnight rate underperforms an equity index in a rising market, so the fund lags by the difference on that sliver. The third, and the one nobody on a brochure mentions, is rebalancing impact cost. When the index reconstitutes, twice a year for the Nifty, the fund must buy the entrants and sell the leavers, and large orders move prices against the fund, a slippage the index itself never suffers because the index is a paper construct that rebalances at a single theoretical price. A fund taking heavy inflows or outflows during a volatile week pays this cost in real money, which is why a larger, steadier fund often tracks better than a tiny one even at the same TER.

Put real numbers on the drag over a long horizon. Take Anjali, a UK-based NRI, who invests Rs 50,00,000 in a Nifty 50 index fund and leaves it for 20 years, with the index compounding at an assumed 11% a year. If her fund carries a total drag (TER plus tracking error) of 0.10%, her money grows to roughly Rs 3,93,00,000. If instead she had bought the lazy default, a fund with a 0.50% total drag, the same Rs 50 lakh grows to about Rs 3,64,00,000. The difference is close to Rs 29,00,000, on a fund that tracks the very same 50 companies. The lesson is not that 0.4% sounds small; it is that 0.4% a year compounded over two decades is a flat in a tier-two city. When you choose between two Nifty funds, the cheaper, larger, lower-tracking-error one is not a marginal call, it is the whole decision.

ETF liquidity on the NSE: the spread is a hidden fee you pay on every trade

ETFs look cheaper than index funds on the TER line, and the ICICI Nifty 50 ETF at 0.02% genuinely is. But an ETF has a cost an index fund does not: the bid-ask spread, the gap between the price at which you can buy and the price at which you can sell at the same instant. On a heavily traded ETF that gap is trivial. On a thin one it can swallow several years of the TER saving in a single round trip.

The relevant concept on the NSE is impact cost, the exchange's own measure of liquidity: the cost you bear, beyond the quoted price, to actually fill an order of a given size. For a stock to even qualify for the Nifty 50 it must have traded at an average impact cost of 0.50% or less for a Rs 10 crore basket. ETFs themselves vary enormously. A flagship Nifty 50 or Nifty Bank ETF trades tight, with spreads and impact cost in the low single-digit basis points, because authorised participants arbitrage any gap against the underlying basket. A narrow thematic or smart-beta ETF can show spreads of half a percent or worse, especially in the first and last fifteen minutes of the session, and especially in size.

For an NRI this matters more than for a local trader, because you are often investing lumpy remittances rather than a daily SIP, and a large single order is exactly what a thin ETF cannot absorb. The practical rules are concrete. Trade only ETFs with deep daily volume, the large-AMC Nifty 50, Sensex and Nifty Bank products, not the obscure sector or factor ones. Avoid the opening and closing fifteen minutes, when spreads are widest. Use limit orders pegged near the indicative NAV (iNAV) the AMC publishes through the day, never a market order that fills against whatever thin quote is sitting on the book. And if your order is large relative to the ETF's daily turnover, accept that an index fund, bought at a single clean NAV with zero spread, is the better instrument despite its slightly higher TER. The spread is a fee you pay twice, on the way in and on the way out, and on a thin ETF it dwarfs the headline cost advantage.

Equity ETF versus everything else: the tax split that trips people up

All Nifty and Sensex ETFs are equity ETFs in the eyes of the Income Tax Act, meaning they hold 65% or more in Indian equities, and they are taxed exactly like an equity mutual fund. Gains on units held 12 months or less are short-term, taxed at 20%. Gains above that holding period are long-term, taxed at 12.5% on the amount over Rs 1.25 lakh a year, for transfers on or after 23 July 2024, with surcharge capped at 15% and 4% cess. That is the friendliest tax treatment in the Indian system, and it applies in full to your Nifty index fund or ETF. The detailed mechanics, including the surcharge cap and the basic-exemption trap that hits NRIs specifically, are in the capital gains guide.

Where people get hurt is by assuming the same soft treatment applies to non-equity ETFs. A gold ETF, an international-index ETF (one tracking the S&P 500 or Nasdaq 100 from an Indian wrapper), and a debt ETF are not equity ETFs, and they no longer enjoy the gentle long-term rate. After the Finance Act 2024 overhaul, the holding period and rate for these depend on the asset class and your purchase date, and for a specified debt-heavy fund bought on or after 1 April 2023 every gain is treated as short-term at slab rate under Section 50AA, with no long-term benefit and no indexation at all. So a US-tracking ETF you bought through your Indian account to get dollar exposure is taxed far more harshly than the Nifty ETF sitting next to it in the same demat, even though both look like "ETFs" on your statement.

The point that follows is a portfolio one, not just a tax one. If you want global equity exposure and you are taxed in India, getting it through an India-domiciled international ETF buys you the worst of both worlds: a heavier Indian tax treatment and, for US and Canada NRIs, the PFIC overlay below. The cleaner route to the S&P 500 is almost always to buy a US-listed S&P 500 ETF in your home brokerage, not an Indian feeder. Reserve your Indian index holdings for Indian indices, where the equity tax rate actually works in your favour.

The PFIC trap: why a cheap Indian fund is the wrong holding for a US NRI

This is the fork that overrides everything above. If you are a US tax resident, an Indian mutual fund or index fund is a Passive Foreign Investment Company, and the US tax code treats PFICs with a hostility reserved for almost nothing else in the personal-tax world. Under IRC Section 1297 a foreign corporation is a PFIC if 75% or more of its income is passive or 50% or more of its assets produce passive income, and a mutual fund, by its nature, fails both tests instantly. Every Indian fund qualifies: equity, debt, hybrid, index, ETF, sectoral, all of them. There is no Nifty index fund clever enough to escape this; the structure itself is the problem.

What the PFIC label does to you depends on whether you make an election, and none of the three outcomes is good. The default regime under Section 1291, which applies if you do nothing, is the punitive one. When you finally sell or receive an "excess distribution," the gain is allocated rateably across every year you held the fund, taxed at the highest ordinary rate in force for each of those years, and then charged interest as if you had underpaid tax all along. A long-held position can see an effective rate well north of the 12.5% you would have paid in India, with the interest charge alone turning a good investment into a mediocre one. The mark-to-market election under Section 1296 is the usual escape: you report the rise in the fund's value each year as ordinary income, taxed at rates up to 37% federal, even in years you sell nothing, in exchange for no interest charge and clean annual reporting. You give up the preferential long-term capital gains rate entirely. The third option, the QEF election under Section 1295, would let you keep capital-gains character, but it requires the fund to provide US-format annual PFIC statements, and Indian AMCs do not, so QEF is effectively unavailable for a retail Indian fund.

On top of the tax, the compliance is relentless. You file a separate Form 8621 for each PFIC you hold, every year, and a missed 8621 keeps your entire return open by suspending the statute of limitations indefinitely. Three Indian index funds is three forms a year, forever, plus your FBAR and FATCA reporting. The cost of preparing these often exceeds any expense-ratio saving the cheap Indian fund gave you in the first place.

Put it in numbers against the alternative. Take Vikram, a US-resident NRI, who wants Rs 40,00,000 of Nifty 50 exposure. Route one: an Indian Nifty index fund at 0.05% TER. The headline cost is Rs 2,000 a year, and he feels clever. But he is now a PFIC holder. Assume the fund doubles over ten years to Rs 80,00,000 and he sells. Under the Section 1291 default, his Rs 40,00,000 gain is spread back across ten years and taxed near his top ordinary rate, say 35%, plus an interest charge that can add several percentage points of effective tax, landing him at an effective rate that can exceed 40%, call it roughly Rs 16,00,000 to Rs 17,00,000 of US tax, before any Indian TDS and credit mechanics. Route two: he buys the iShares MSCI India ETF (INDA), a US-domiciled fund, in his ordinary US brokerage. It is not a PFIC because it is a US corporation, so there is no Form 8621, no excess-distribution maths. The same doubling is a long-term capital gain taxed at the US long-term rate, say 15% to 20%, roughly Rs 6,00,000 to Rs 8,00,000. INDA's expense ratio is 0.61%, vastly higher than the Indian fund's 0.05%, and Vikram still comes out far ahead, because a 0.56% annual fee gap is trivial against a 20-plus percentage-point tax gap and an annual compliance bill. The cheap fund was the expensive choice.

The US-domiciled India ETFs, and which one to actually buy

For a US (and largely Canadian) NRI, the right vehicle for India exposure is a US-listed India ETF, which gives you the index without the PFIC machinery. Three names dominate, and they are not interchangeable. The iShares MSCI India ETF (INDA) is the largest and most liquid, tracking the MSCI India index, with an expense ratio of 0.61% and over USD 10 billion in assets; its scale means tight spreads and easy fills. The Franklin FTSE India ETF (FLIN) tracks the FTSE India index and is the cost leader at just 0.19%, a third of INDA's fee, and it is the one that pays a distribution; for a buy-and-hold investor the lower fee makes FLIN the default choice on cost. The WisdomTree India Earnings ETF (EPI) is the outlier: it weights by earnings rather than market cap, which is a genuine strategy difference, but it charges a steep 0.84%, has shown meaningful tracking divergence from the broad market, and ceased distributions in 2024, so it suits only an investor who specifically wants its earnings tilt. There is also the iShares India 50 ETF (INDY), tracking the Nifty 50 itself, useful if you want the exact Nifty index American investors talk about, with a 30-day median bid-ask spread around 0.07% as of June 5, 2026, a reminder of how liquid these large funds are.

The honest trade-off to name out loud: a US-domiciled India ETF will track the Indian market less perfectly than an India-domiciled Nifty fund, because of the higher fee, currency layering and the ETF's own index choice, and you lose the 12.5% Indian equity tax rate in favour of US rates. You accept that worse tracking and that different tax rate to escape PFIC. For a US person it is not close: FLIN at 0.19% or INDA at 0.61%, held in a normal brokerage, beats a 0.05% Indian fund wrapped in Form 8621 every single time.

GIFT City: the feeder fund that does not solve PFIC, and the structure that does

GIFT City, India's International Financial Services Centre regulated by the IFSCA, is increasingly pitched to NRIs as the clean way to get India exposure, and the retail momentum is real: the investor base in IFSC retail schemes rose roughly 177% quarter-on-quarter to about 3,438 by March 2026. In September 2025 Tata Asset Management received IFSCA approval for the first retail inbound feeder, letting an NRI invest from GIFT City into a mainland Indian equity strategy with a minimum as low as USD 500. For many NRIs this is a genuinely good route: dollar-denominated, no PIS friction, and certain Category III AIF gains routed through GIFT City into Indian equity are exempt from Indian capital gains tax under Section 10(4D).

But here is the trap inside the solution, and it is the most important sentence in this section for a US or Canada reader: a GIFT City feeder fund or mutual fund is still almost certainly a PFIC. It is a pooled fund holding passive securities, which is the exact definition the IRS uses, so a US person who buys the Tata GIFT City feeder has not escaped Form 8621 at all; they have simply added a layer. The GIFT City wrapper solves Indian-side friction and Indian tax, not US-side PFIC. The structure that does avoid PFIC is a Portfolio Management Service (PMS) or separately managed account, where you own the underlying individual securities directly rather than units of a fund. Direct ownership of stocks is not a PFIC, so a GIFT City PMS can give a US NRI India exposure without the 8621 machinery, at the cost of a high minimum (typically several lakh dollars) and a real management fee. The full picture, including the AIF and PMS routes and the minimums, is in the GIFT City investing guide. The short version: GIFT City is excellent for UAE and UK NRIs and for high-net-worth US NRIs who can use a PMS, but a GIFT City feeder fund is not the PFIC escape it is sometimes sold as.

The choice, laid out by where you live

You are tax-resident in	Best India index vehicle	Why	The thing to watch
UAE	Indian Nifty/Sensex index fund or ETF via NRE	No PFIC equivalent; Indian equity tax can even be zero on shares under the treaty	Pick lowest total-drag fund; use TRC and Form 10F for treaty relief
UK	Indian Nifty/Sensex index fund or ETF via NRE/NRO	No PFIC; report on UK return, claim foreign tax credit	UK reporting-fund status and dividend/gain timing; low TER matters most
USA	US-domiciled India ETF (FLIN, INDA) or GIFT City PMS	Indian funds are PFICs; US ETFs and direct-holding PMS are not	Never buy an India-domiciled fund; a GIFT City feeder is still a PFIC
Canada	US-domiciled India ETF, or direct holdings	Harsh foreign-fund tax plus T1135 reporting on Indian funds	Foreign property over CAD 100,000 triggers T1135; funds add complexity

Edge cases

Canada is not quite the US, but close enough to act the same way. Canada has no PFIC regime by that name, but it taxes many foreign mutual funds unfavourably and requires Form T1135 once your specified foreign property, including Indian fund units, costs more than CAD 100,000, with penalties of CAD 25 a day up to CAD 2,500 a year for late filing, and far more if the CRA finds gross negligence. The mark-to-market-style treatment Canada applies to some offshore funds, plus the reporting burden, lands a Canadian NRI in roughly the same place as an American: a US-domiciled India ETF or direct holdings beat an Indian fund. Confirm the specific fund's Canadian treatment with a cross-border accountant before you buy.

The NRO-only investor and ETFs. If you invest from an NRO account rather than NRE, index funds are still simple, but ETF trading still needs the demat and trading account, and the PIS rules differ between NRE and NRO routing. NRO money is also non-repatriable beyond the USD 1 million annual limit, so think about whether you will want the proceeds abroad before you lock gains into NRO-funded ETFs.

Moving to or from the US mid-holding. The PFIC clock is unforgiving. If you buy an Indian index fund while UK-resident and later move to the US, those units become PFICs the moment you become a US person, and the years of holding before the move can still feed the Section 1291 calculation. If a US move is on your horizon, do not accumulate India-domiciled funds in the years before it; a planned "purge and rebuy" into a US ETF before you land can save a great deal, but it must be done with advice and before you become a US resident.

International and gold ETFs bought through India. As covered above, these are non-equity for Indian tax and lose the soft long-term rate, and for US and Canada NRIs they are also PFICs. There is almost no case for getting S&P 500 or gold exposure through an India-domiciled ETF if you live in the US, the UK or Canada; buy those in your home market instead and keep your Indian account for Indian indices.

The closing read

The honest read is that "which index fund" is the wrong first question for an NRI. The first question is "where am I taxed," and the answer reorders everything. For a UAE or UK NRI, the textbook advice holds cleanly: buy an India-domiciled Nifty 50 or Sensex index fund, choose the one with the lowest total drag (TER plus tracking error, not the brochure expense ratio), and if you prefer ETFs, stick to the large, liquid Nifty and Sensex products and trade them with limit orders away from the open and close. A 0.4% drag difference is Rs 29 lakh over twenty years on Rs 50 lakh; treat the cost choice as seriously as the asset-allocation choice it sits inside, which the asset allocation guide covers next.

For a US or Canada NRI, the recommendation is firmer and it cuts against intuition: do not buy an India-domiciled fund at all, however cheap it looks. The PFIC regime, with its ordinary-rate taxation, interest charge and annual Form 8621, will cost you many multiples of any expense-ratio saving, and it never stops. Buy a US-listed India ETF instead, FLIN at 0.19% if cost is your priority or INDA at 0.61% for maximum liquidity, hold it in your ordinary brokerage, and accept slightly worse tracking as the price of escaping a punitive tax. If you are a high-net-worth US NRI who genuinely wants India-domiciled exposure, a GIFT City PMS that holds individual securities, not a feeder fund, is the one structure that avoids PFIC. The exception to all of this is the investor with a US move on the horizon: stop buying Indian funds now, and plan the switch before you become a US resident, not after. The one mistake to never make is the New Jersey reader's: choosing the fund with the lowest expense ratio while ignoring the tax regime that decides your actual return. On India exposure, your passport is the expense ratio that matters.

Related guides

• NRI mutual fund eligibility and the PFIC trap
• Direct equity versus mutual funds for NRIs
• Buying Indian stocks as an NRI: the PIS route
• Capital gains tax for NRIs on shares and mutual funds
• NRI portfolio and asset allocation
• GIFT City investing for NRIs
• All Investments guides
• All Taxation guides

This guide is educational and general in nature. It is not individual investment or tax advice. Fund expense ratios, ETF liquidity and tax rules change, and the US PFIC and Canadian foreign-fund positions are complex and fact-specific, so confirm your own situation with a qualified financial adviser and a cross-border tax professional before you invest.