Last updated: 20 October 2026
Picture two ways to get to the office. One is the metro: same route every day, cheap ticket, no surprises. The other is a cab with a driver who says, "Trust me, I know a shortcut." Some days he does beat the metro. Many days he gets stuck at the same signal, and you still pay the cab fare.
That, in a nutshell, is the choice between an index fund and an actively managed fund. Let's break it down.
What is an index fund?
An index fund simply copies a market index. An index is a ready-made list of companies, like the Nifty 50 (India's 50 big companies) or the Sensex (30 big companies).
If a company makes up 10% of the Nifty 50, a Nifty 50 index fund puts about 10% of your money in it. Nobody at the fund house is picking "winners". The fund just follows the list, and when the list changes, the fund changes too.
So an index fund won't beat the market. Its whole job is to be the market, minus a small fee.
What is an actively managed fund?
An actively managed fund has a fund manager and a research team who pick which shares to buy, how much and when to sell. Their goal is to beat a benchmark index.
For example, a large-cap fund has to keep at least 80% of its money in large-cap companies, which SEBI defines as India's top 100 listed companies by market value. Within that, the manager is free to choose. If their picks do better than the index, you win. If not, you've paid extra for the effort.
Index funds vs active funds: the cost difference
Paying a team of experts costs money, and that comes out of your returns through the expense ratio (the yearly fee a fund takes, already built into its NAV).
Under SEBI's mutual fund rules in force from 1 April 2026, the maximum base expense ratio is:
| Fund type | Maximum base expense ratio (per year) |
|---|---|
| Actively managed equity funds | 2.10% for the smallest funds, falling in slabs to 0.95% for the largest |
| Index funds and ETFs | 0.90% |
These are ceilings. Many index funds, especially direct plans, charge far less than 0.90%. You can check any scheme's actual fee on the fund's page or on AMFI's TER list.
A 1% or 1.5% gap sounds like nothing. It's the price of one samosa on a ₹100 plate. But it gets taken every single year, from your whole investment.
How much does the fee gap cost over 20 years?
Let's say you run a ₹10,000 a month SIP for 20 years, so you put in ₹24 lakh in total. Assume the market (the index) grows at 12% a year before fees.
| Fund | Yearly fee (example) | Return after fees | Value after 20 years |
|---|---|---|---|
| Index fund (direct plan) | 0.2% | 11.8% | about ₹97 lakh |
| Active fund (regular plan) that only matches the index before fees | 1.7% | 10.3% | about ₹80 lakh |
| Same active fund, direct plan | 0.7% | 11.3% | about ₹91 lakh |
| Active fund that beats the index fund by 1 percentage point a year after fees | n/a | 12.8% | about ₹1.11 crore |
Illustration only: these returns are assumptions, not a forecast for any fund. The fees are rounded from real figures: 0.2% is what HDFC Index Fund Nifty 50 charges in its direct plan (October 2026), and 1.7% and 0.7% are close to the June 2026 averages for active large-cap funds' regular (1.73%) and direct (0.73%) plans. The maths: return after fees = 12% minus the fee, and value = ₹10,000 × [(1 + r)^240 − 1] ÷ r × (1 + r), where r is the yearly return ÷ 12 and each SIP is invested at the start of the month. At 11.8%, r = 0.983% a month, which gives about ₹97.2 lakh; at 10.3% it gives about ₹79.6 lakh, and at 11.3% about ₹90.9 lakh.
Fintelligent
So the active fund has to do more than "be good". It has to beat the index by more than its extra fee, for years, just to break even with a cheap index fund. If it manages that, great. If it doesn't, the fee gap between the regular plan and the index fund here costs you about ₹17.6 lakh (₹97.2 lakh minus ₹79.6 lakh). Even in the cheaper direct plan, the 0.5-point gap costs about ₹6.3 lakh.
Do active funds actually beat the index in India?
Some do. Most don't, at least not for long.
S&P Dow Jones Indices publishes a regular report called the SPIVA India Scorecard, which counts how many active funds trailed their benchmark. Its Mid-Year 2026 edition (data to 30 June 2026, the latest edition as of October 2026) compared each category with an S&P index: the S&P India LargeMidCap for large-cap funds, the S&P India BMI for ELSS funds and the S&P India SmallCap for mid- and small-cap funds. It found (figures rounded):
| Fund category | Underperformed over 5 years | Underperformed over 10 years |
|---|---|---|
| Large-cap funds | 85% | 74% |
| ELSS (tax-saving) funds | 71% | 80% |
| Mid- and small-cap funds | 55% | 82% |
Fintelligent
In plain words: over the 10 years to June 2026, roughly three out of four active large-cap funds (74.03%) did worse than their SPIVA benchmark, the S&P India LargeMidCap, an index of large and mid-sized companies.
Two fair points on the other side:
- The picture changes with the market. In the one year to June 2026, only 15% of active mid- and small-cap funds trailed their benchmark. Active managers tend to have more room in smaller companies, where fewer analysts are watching.
- Some experts argue SPIVA's benchmarks aren't a perfect match for every fund category. Even so, most comparisons, including those by Indian research firms, show the majority of large-cap funds lagging over five years.
The tricky part isn't that good active funds don't exist. It's picking them in advance, because last few years' star fund is often not the next few years' star.
What to check before buying an index fund
Index funds are simple, but not all are equal. Look at:
- Expense ratio: two Nifty 50 index funds hold the same shares, so the cheaper one usually wins.
- Tracking error: how closely the fund follows its index day to day. SEBI requires equity index funds and ETFs to keep it at or below 2% a year and to publish it daily on the fund house and AMFI websites. Lower is better.
- Tracking difference: the actual gap between the fund's return and the index's return over 1, 3, 5 and 10 years, published monthly. This is the closest thing to "how much did I really lose to costs".
- Which index: a Nifty 50 fund, a Nifty Next 50 fund and a smallcap index fund behave very differently. Pick the index first, then the fund.
How are index funds and active funds taxed?
Good news: no difference here. Equity index funds and active equity funds are taxed the same way.
From 1 April 2026, the new Income-tax Act, 2025 applies. If you sell equity fund units after holding them for more than 12 months, gains above ₹1.25 lakh in a tax year are taxed at 12.5% (this is Section 198 of the new Act, earlier Section 112A). Sell within 12 months and the gain is taxed at 20% (Section 196, earlier Section 111A). These rates have applied since 23 July 2024, Budget 2026 did not change them, and surcharge and 4% cess are added on top.
"Equity fund" here means an equity-oriented fund, one that keeps at least 65% in Indian listed shares. That covers Nifty and Sensex index funds and active equity funds, but not an index fund that tracks a US index or bonds, which is taxed differently.
Index fund or active fund: which one should you pick?
A simple way to think about it:
An index fund suits you if:
- You're just starting and want something simple and cheap.
- You don't want to track fund managers, ratings and changes every year.
- You're investing for a long goal like retirement and want "the market's return" without the guesswork.
An active fund might suit you if:
- You're happy to research and review your fund at least once a year.
- You're looking at mid- and small-cap stocks, where active managers have had a better record in some periods.
- You're comfortable with the risk that your fund may trail the index for years.
Plenty of people do both. A common approach is to keep the core of your portfolio, say most of your equity money, in a broad index fund, and put a smaller slice in one or two active funds you believe in. That way, the metro gets you to work every day, and you take the occasional cab when you think it's worth it.
Common mistakes to avoid
- Chasing last year's top fund. Past returns are the most-quoted and least-reliable reason to buy.
- Ignoring the expense ratio. It matters even more over 15 to 20 years than over one.
- Buying the regular plan by default. If you invest on your own, the direct plan of the same fund costs less.
- Owning five funds that hold the same 50 companies. That's not diversification, it's the same plate of chai, five times.
- Stopping your SIP when the market falls. That's true for both types. The falls are when your SIP buys more units for the same money.
The bottom line
An index fund copies the market at a low cost. An actively managed fund tries to beat the market and charges more for trying. In India, most active large-cap funds have trailed their index over 5 and 10 years, so for many people a low-cost index fund is a sensible default, with active funds as an optional extra if you're willing to research them. Whichever you choose, keep costs low, stick with it, and let time do the heavy lifting.
Related reads
Sources (checked 20 October 2026): S&P Dow Jones Indices, SPIVA India Scorecard, Mid-Year 2026 (data as of 30 June 2026; large-cap funds vs S&P India LargeMidCap: 85% underperformed over 5 years and 74% over 10 years; ELSS vs S&P India BMI: 71% and 80%; mid/small-cap vs S&P India SmallCap: 55% and 82%, and 15% over 1 year); Basunivesh, on SPIVA India benchmarks (benchmark change from mid-2024); The Hindu BusinessLine, analysis of ACEMF data (71% of large-cap funds trailed benchmarks over five years to July 2026); SEBI, SEBI (Mutual Funds) Regulations, 2026 (effective 1 April 2026; Regulation 66 base expense ratio limits, as quoted in fund-house addenda such as Tata Mutual Fund, March 2026); SEBI, Master Circular for Mutual Funds, 20 March 2026 (large-cap funds at least 80% in large caps; large cap = 1st to 100th company by full market capitalisation; in force from 1 April 2026); SEBI, Circular on Development of Passive Funds, 23 May 2022 (tracking error of equity index funds and ETFs capped at 2%, disclosed daily; tracking difference disclosed monthly); Income Tax Department, Income-tax Act, 2025 as amended by the Finance Act, 2026 (Section 198: 12.5% on LTCG above ₹1.25 lakh, equity-oriented fund = at least 65% in domestic listed equity; Section 196: STCG 20%; in force from 1 April 2026) and Tax on long-term capital gains (12-month holding period for equity-oriented fund units); PIB, CBDT FAQ on Budget 2024 capital gains changes, 24 July 2024 (from 23 July 2024: STCG on equity funds 15% to 20%, LTCG 10% to 12.5%, exemption ₹1 lakh to ₹1.25 lakh); Tata Mutual Fund, Post-Budget 2026 tax map (Budget 2026 left equity fund rates and the ₹1.25 lakh limit unchanged); The Hindu BusinessLine, same article as above (June 2026 average base expense ratios: active large-cap 1.73% regular, 0.73% direct); Business Today, HDFC Index Fund Nifty 50 Direct Plan (expense ratio 0.20%, October 2026). SIP figures are illustrative calculations with assumed returns (monthly rate = yearly rate ÷ 12, invested at the start of each month), not a forecast for any fund.
