If you’ve spent any time looking into mutual funds in India, you’ve almost certainly come across index funds being recommended. And you’ve probably wondered: aren’t index funds just a type of mutual fund? Why is everyone treating them as if they’re opposites? The confusion is understandable — and this post will clear it up completely.
They are not opposites — one is a subset of the other
Here’s the thing most comparisons get wrong at the start. Index funds are mutual funds. They are a specific category within the mutual fund universe. When people say “index funds vs mutual funds,” what they actually mean is index funds vs actively managed mutual funds. That distinction matters because it shapes everything else in this comparison.
All index funds are mutual funds. Not all mutual funds are index funds. The real question is: should you invest in passively managed index funds or actively managed equity funds?
How each type works
Expense ratio: typically 0.1% – 0.2%
Expense ratio: typically 0.5% – 1.5%
The mechanics lead to a key difference in cost. Index funds have very low expense ratios because there is no active decision-making involved. Actively managed funds charge more because you are paying for the fund manager’s expertise and the research infrastructure behind the fund.
Why expense ratio is not just a small detail
A difference of 1% in annual expense ratio sounds trivial. Over a long SIP, it is anything but.
Net return: ~11.8% ≈ ₹88 lakh
Net return: ~10.8% ≈ ₹77 lakh
Can active funds consistently beat the index?
This is the central question — and the honest answer is: most cannot, over long periods. SPIVA India reports (Standard & Poor’s Indices Versus Active) consistently show that a majority of large-cap active funds underperform their benchmark index over 5 and 10 year periods. Some funds do outperform, but picking them in advance is difficult, and past outperformance is not a reliable predictor of future outperformance.
The picture is somewhat different in mid-cap and small-cap categories. Active fund managers have historically added more value in these segments because the market is less efficient — there is more opportunity to find under-researched companies before the broader market catches up. Index funds in these categories also tend to have higher tracking errors and costs compared to large-cap index funds.
For large-cap investing, the evidence strongly favours index funds. For mid-cap and small-cap, active funds still have a reasonable case — though not guaranteed.
A side-by-side comparison
| Factor | Index funds | Active funds |
|---|---|---|
| Cost | Very low (0.1–0.2%) | Higher (0.5–1.5%) |
| Return goal | Match the market | Beat the market |
| Fund manager risk | None — no active decisions | Depends on manager skill and continuity |
| Transparency | Very high — you know exactly what you own | Portfolio disclosed monthly with a lag |
| Best suited for | Large-cap, Flexi allocation | Mid-cap, small-cap segments |
| Tax treatment | Same — LTCG at 12.5% above ₹1.25 lakh | Same — LTCG at 12.5% above ₹1.25 lakh |
| Effort required | Minimal — set SIP and leave it | Periodic review of fund performance needed |
Two real examples
Which one should a salaried investor choose?
How to get started
If you are new to investing, start with 100% large-cap via a Nifty 50 or Nifty 100 index fund. Add mid-cap and small-cap funds once your large-cap SIP is running consistently.
Look for a direct plan with an expense ratio under 0.2% and a low tracking error (the difference between the fund’s actual returns and the index). Both are available on platforms like MF Central or Zerodha Coin.
Check 5 and 10-year returns relative to the category benchmark, not just absolute numbers. Also check if the fund manager has been consistent. A fund that changed managers recently is a higher-risk pick.
Regular plans pay a commission to your distributor or broker — this is embedded in a higher expense ratio. Direct plans have no such commission and compound better over time. The difference compounds significantly over 15–20 years.
The bottom line
Index funds are not a new or niche concept — they are the default starting point for most long-term equity investors globally, and increasingly in India too. For salaried investors who want their money working efficiently without spending hours tracking funds, a Nifty 50 or Nifty 100 index fund is hard to beat for the large-cap portion of their portfolio.
Active funds still have a place — particularly in mid and small-cap categories where skilled managers can add value. The most sensible approach for most salaried investors is to combine both: index funds at the core, active funds at the edges where they’re most likely to earn their fee.
Once you know which type of fund suits you, the next step is setting up a systematic investment plan. Read our guide on how to start investing on a small salary to put this into practice.
This post is for educational purposes only and does not constitute financial advice. For personalised guidance, consult a SEBI-registered investment adviser.