Index funds vs active funds in India

By Navprabhat K·Updated 28 July 2026·9 min read

This is not a question with one answer. It has a different answer for large caps than it does for small caps, and the reason is structural.

What you are actually choosing between

An index fund buys the constituents of a published index in the published weights. Nobody is deciding what to own. If the Nifty 50 adds a company, the fund adds it. The manager's job is operational: replicate the index as closely and as cheaply as possible.

An active fund employs a manager and a research team to select holdings they believe will beat a benchmark. You pay a higher fee for that judgment. The bet you are making is that the manager's skill will exceed their fee, consistently, over your holding period.

Note the shape of that bet. Before costs, active investors as a group must earn roughly the market return, because collectively they largely are the market. After costs, the group must underperform by the amount of those costs. This is arithmetic, not opinion. It does not mean no manager can win, but it does mean that the average active rupee loses to the index by roughly the fee, and your job is to identify a specific winner in advance.

Two rule changes that reshaped the debate

Indian active funds had a strong track record for a long time, and older articles still lean on it. Two regulatory changes make that history a poor guide to the present.

1. Total Return Index benchmarking (2018)

Until 2018, most Indian funds were measured against a Price Return Index, which tracks only price movement and ignores dividends. The fund itself received those dividends. So a fund that merely matched the market appeared to beat its benchmark, by roughly the dividend yield, every year, purely because of how the comparison was drawn.

SEBI required a shift to the Total Return Index, which includes dividends. That removed a persistent scoring advantage of roughly one to one and a half percentage points a year. Outperformance records that look impressive from before 2018 should be discounted accordingly.

2. Scheme categorisation (2017)

SEBI's categorisation circular forced every scheme into a defined bucket with mandated holding rules. The one that matters most here: a large-cap fund must hold at least 80% of its assets in the top 100 companies by market capitalisation.

Before this, a "large-cap" fund could quietly hold mid caps and pick up the extra return that came with them, while still being compared to a large-cap benchmark. That escape hatch is now closed. Large-cap managers must compete inside the most heavily analysed 100 stocks in the country, where a genuine informational edge is scarce.

Large caps: the argument is mostly over

S&P's SPIVA India scorecards, which measure active funds against their benchmarks and correct for survivorship bias by accounting for funds that closed or merged, have repeatedly shown a majority of Indian large-cap active funds trailing their benchmark over five and ten year horizons. The proportion moves from report to report, but the direction has been consistent since TRI benchmarking arrived.

Three structural reasons, in order of importance:

• •Cost. An active large-cap direct plan often charges around 1% more than an index fund tracking the same universe. That is a full percentage point of guaranteed drag against an uncertain benefit.
• •A narrow universe. Every one of the top 100 Indian companies is covered by dozens of analysts. Finding mispricing there is genuinely hard.
• •Size. A large fund cannot take a meaningful position in a smaller company without moving the price, so as a successful fund grows, it drifts closer to the index while still charging active fees. This is sometimes called closet indexing, and you are paying 1.5% for something that behaves like an index fund.

Mid and small caps: where a fee can earn its keep

The picture genuinely changes as you go down the market cap ladder, and anyone telling you passive always wins is overselling it.

• •Coverage is thin. Plenty of Indian small caps are followed by one analyst or none. Doing original work there can produce a real edge, in a way that it cannot for a large bank everyone models to the rupee.
• •Dispersion is enormous. The gap between the best and worst small-cap performers in a given year is vast, so stock selection has far more to work with.
• •Quality screening has value. A small-cap index takes everything that meets the inclusion rules, including companies with weak balance sheets and governance problems. An active manager can decline to own those. In this segment, avoiding disasters is a large part of the return.

The counterweights are real too. Small-cap funds are capacity constrained, so a fund that grows too large loses the nimbleness that made it good, and several AMCs have restricted lump-sum inflows into small-cap schemes for exactly this reason. Liquidity is thinner, so exits in a falling market are costlier. And outcomes vary far more between managers, so the penalty for choosing badly is larger.

The cost gap, in rupees

Typical direct plan costs in India, as a rough guide:

On a ₹10,000 monthly SIP running 20 years at 12% before costs, a one percentage point difference in annual cost works out to roughly ₹12 lakh less at the end, on ₹24 lakh invested. So the honest question is not "can this manager beat the index?" It is "can this manager beat the index by more than one percentage point a year, after tax, for twenty years, and can I identify them now?"

For large caps, that is a demanding bar. For small caps, it is a reasonable one.

What is identical either way

A few things people assume differ, and do not:

• •Taxation. Both are equity-oriented schemes and are taxed identically. Post the July 2024 changes, short-term capital gains on equity funds are taxed at 20% and long-term gains at 12.5% above the annual exemption threshold. Rates change with each Budget, so confirm the current position before you plan around it.
• •Risk of loss. An index fund is not safer. It holds equities and will fall with the market. It removes manager risk, not market risk.
• •Exit loads and SIP mechanics. Broadly the same, though specific schemes vary.
• •Regulatory protection. Both sit under the same SEBI framework, the same custodial arrangements and the same daily NAV disclosure.

A framework for deciding

A defensible default for most people, rather than a recommendation for you specifically:

1. Index the large-cap portion. This is where the evidence is strongest and the fee is hardest to justify. A low-cost Nifty 50 or broad-market index fund covers it.
2. Consider active for mid and small caps, if you are willing to do the work of selecting a manager and to tolerate wider outcomes. If you are not, index these too. An indexed small-cap allocation beats an actively chosen one you abandon after a bad year.
3. Fix your asset allocation before your fund selection. How much you hold in equity versus debt will drive your outcome far more than whether the equity portion is active or passive. This is the decision people spend the least time on.
4. Keep the number of funds small. Eight equity funds do not give you diversification, they give you an expensive index fund with overlapping holdings. Three or four is usually plenty.
5. Whatever you choose, choose the direct plan unless you are getting real advice for the commission.

What to check before buying an index fund

Index funds are not interchangeable just because they track the same index. Before you buy:

• •Expense ratio of the direct plan. Among funds tracking the identical index, this is the single biggest differentiator. See the expense ratio guide for the detail.
• •Tracking difference, then tracking error. A cheap fund that tracks its index sloppily can end up costing more than a slightly pricier one that tracks it well. How to read tracking error covers how to compare these properly.
• •Fund size. Very small index funds carry higher costs and more operational friction. Larger schemes generally track more tightly.
• •Which index, exactly. A Nifty 50 fund, a Nifty Next 50 fund and a Nifty 500 fund are three genuinely different products with different risk profiles. The Next 50 in particular is considerably more volatile than the headline index, and is often mis-sold as a large-cap equivalent.
• •Index fund or ETF. ETFs can be cheaper on paper but add bid-ask spreads, a demat account and the risk of trading at a premium or discount to fair value. For SIPs, a plain index fund is usually the simpler choice.

Fund Explorer ranks index and active funds side by side on cost, returns, tracking error and assets under management, so you can see what an active fee is actually buying you in a given category before you commit to it.