Index Funds vs Active Funds: Which Is Better in India?

Index funds usually win on cost and predictability, while active funds offer a chance, not a promise, of beating the market. For Indian large-cap investing, the data so far has favoured index funds: most active large-cap funds have trailed their benchmark over five and ten years. In mid-cap, small-cap and flexi-cap categories the picture is more mixed, so the right answer depends on which part of the market you are buying.

If you are new to passive investing, start with our explainer on index funds for beginners. This article is the head-to-head comparison.

The core difference

An index fund buys every stock in an index, such as the Nifty 50, in the same weights, and aims to match the index return minus costs. An active fund has a fund manager and research team who choose stocks to try to beat a benchmark.

What the data says: SPIVA India

S&P Dow Jones Indices publishes the SPIVA India Scorecard, which counts how many active funds trailed their benchmark. In the year-end 2025 scorecard, the share of Indian large-cap equity funds that underperformed the S&P India LargeMidCap index was:

Two caveats matter. First, SPIVA now compares Indian large-cap funds with the S&P India LargeMidCap index, which is broader than the top-100 universe SEBI requires large-cap funds to invest in, so some analysts argue the comparison is imperfect. Second, past underperformance does not mean every active fund will lag in future. Still, when three out of four funds trail across several periods, picking a future winner in advance is hard.

Why large caps are hard to beat

SEBI's categorisation rules require a large-cap fund to keep at least 80% of its assets in the top 100 companies by full market capitalisation, as of October 2026. Those stocks are heavily researched, so mispricing is rare. The manager has limited room to differ from the index, yet charges several times more. That combination makes outperformance after costs difficult.

Mid-cap (ranks 101-250) and small-cap (rank 251 onwards) stocks are less researched, and active managers there have more room to add value. They also have more room to get it wrong, and results across funds are widely spread.

Costs: the gap you can measure

From 1 April 2026, SEBI's new Mutual Funds Regulations replaced the old all-inclusive total expense ratio caps with a base expense ratio (BER) plus brokerage and statutory levies charged separately. As of October 2026, the BER cap for index funds and ETFs is 0.90%, while active equity schemes have higher slab-based caps that fall as fund size rises. These are ceilings; most large index funds charge far less. Always check the actual TER on the AMC website.

Worked example: what costs do over 20 years

Illustrative example. You invest a ₹10 lakh lumpsum for 20 years. Assume the underlying stocks earn 11% a year before costs, and ignore tracking error and taxes.

Calculation: ₹10,00,000 × (1.108)^20 = ₹77,76,698, and ₹10,00,000 × (1.10)^20 = ₹67,27,500.

The 0.8 percentage-point cost difference costs about ₹10.5 lakh over 20 years in this illustration. For the active fund to merely match the index fund, the manager must beat the market by at least 0.8% a year, every year, before costs. If the manager does beat it by 1% a year (12% gross, 11% net), the illustrative value would be ₹80,62,312, so skill can pay, but only if it is consistent.

These numbers are illustrative only and not a forecast. Run your own scenarios in the lumpsum calculator. The regular-plan row shows why the plan choice matters too; see direct vs regular mutual funds.

Risks of each

Index fund risks

• Market risk: you get the full fall of the index in a crash, with no manager moving to cash.
• Tracking error: returns can lag the index slightly because of costs, cash holdings and rebalancing.
• Concentration: the Nifty 50 is weighted towards a few sectors, such as financials, and its top holdings make up a large share.
• Narrow or thematic indices: sector, smart-beta and factor index funds can be far more volatile than broad indices.

Active fund risks

• Manager risk: a poor run of stock picks, or a change of fund manager, can hurt returns.
• Style drift: a fund can move away from what you bought it for, within the category limits.
• Higher costs: the fee is charged whether or not the fund beats its benchmark.
• Selection risk for you: last few years' top performers often do not stay at the top.

How to decide

Ask three questions:

1. Which segment am I buying? For large-cap exposure, an index fund on the Nifty 50, Sensex or Nifty 100 is a reasonable default given the data. For mid and small caps, either approach can work, but costs still matter.
2. Will I monitor an active fund? Active funds need a yearly review against their benchmark and category. If you will not do that, a low-cost index fund is easier to hold.
3. What am I paying? Compare direct-plan TERs. A cheap active fund with a long record may be reasonable; an expensive one has a high bar.

Many investors use a core and satellite mix: a low-cost index fund as the core (for example 60-70% of equity) and one or two active funds as satellites. Whichever you choose, investing regularly matters more than the label. See SIP vs lumpsum for how to deploy money.

Tax: no difference

Equity index funds and active equity funds are both equity-oriented funds. As of October 2026, in FY 2026-27:

• Long-term gains (units held over 12 months) are taxed at 12.5% above ₹1.25 lakh a year (old Section 112A, now Section 198 of the Income-tax Act, 2025).
• Short-term gains are taxed at 20% (old Section 111A, now Section 196).

Index funds may be slightly more tax-efficient inside the fund because of low turnover, but this does not change your own tax bill, since mutual funds do not pass capital gains through to investors until you redeem.

Key takeaways

• Index funds aim to match the market at low cost; active funds try to beat it at a higher cost.
• SPIVA India's year-end 2025 data shows 84.4% of large-cap active funds trailed their benchmark over five years and 76.3% over ten.
• A 0.8% yearly cost gap can cost about ₹10.5 lakh on ₹10 lakh over 20 years in an illustrative 11% scenario.
• Active funds have more scope in mid and small caps, but results vary widely and nothing is assured.
• Tax treatment is identical; the decision rests on cost, the market segment and how much monitoring you will do.