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For a long-term equity SIP in India, a broad, low-cost index fund is a reasonable default if you want market exposure without depending on a fund manager to beat a benchmark. That is not a guarantee it will outperform: index funds can be concentrated, track imperfectly and lose value, while some active funds may outperform. Compare funds within the same category, check their costs and risks, and choose an equity allocation you can stick with through market declines.
At a glance
| Name | Best for | Key distinction | Checked |
|---|---|---|---|
| Broad index fund | Investors seeking market exposure without relying on manager selection | Follows an index; costs and implementation can cause it to lag that index | November 2026 |
| Active equity fund | Investors who want a manager to select securities in an attempt to beat a relevant benchmark | Manager discretion may add value or detract from benchmark returns; expenses are typically higher | November 2026 |
What is the difference between an active equity fund and an index fund?
An active equity fund gives its manager discretion to choose securities with the aim of outperforming a benchmark. An index fund instead aims to replicate a named index’s constituents and weights. Neither approach guarantees a particular return, and the label alone does not tell you whether a fund suits your goal.
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SEBI describes active funds as funds that “attempt to generate higher returns than their benchmark index by actively managing the portfolio.” An index fund’s job is different: to follow the index, not to make a discretionary call that it can beat it. Its returns will not necessarily match the index exactly, because expenses and implementation create a gap.
| What to compare | Active equity fund | Index fund |
|---|---|---|
| Portfolio method | Manager chooses securities within the scheme’s mandate, seeking to beat its benchmark | Seeks to replicate a chosen index’s constituents and weights |
| Costs | Typically higher than passive funds, although the actual expense depends on the scheme and plan | Typically lower, but not zero; costs still affect the investor’s return |
| Performance question | Did its net return beat an appropriate benchmark and comparable peers? | How closely did it follow its index after costs? |
| Main source of variation | Manager choices can help or hurt relative performance | Index design, portfolio implementation and tracking gap affect results |
| What you are choosing | A mandate, manager-led approach and portfolio | An index methodology, its holdings and a fund’s execution of it |
These are broad differences, not rules about every scheme. Fund mandates, benchmarks, expenses and portfolios vary. An active fund should not be judged against an unrelated index, and an index fund should not be judged as if beating its index were its purpose.
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Which is better for a long-term SIP?
If your priority is broad market exposure at relatively low cost, an index fund can be a defensible default. If you are considering an active fund, the question is whether its approach, record against a suitable benchmark, costs and risks make it a reasonable choice—not whether active management can ever work.
Long-run category-level evidence gives a reason to be cautious about assuming that an active fund will outperform. In its mid-year 2025 scorecard, S&P Dow Jones Indices reported that, over the 10 years ending June 30, 2025, 73.27% of Indian Equity Large-Cap funds underperformed the S&P India LargeMidCap; 86.84% of Indian ELSS funds underperformed the S&P India BMI; and 81.67% of Indian Equity Mid-/Small-Cap funds underperformed the S&P India SmallCap. These results are specific to the categories, benchmarks and period in that SPIVA India Mid-Year 2025 Scorecard.
A separate SPIVA India Year-End 2024 scorecard found that 88% of Indian Equity Mid-/Small-Cap funds lagged the S&P India SmallCap and 84% of Indian ELSS funds underperformed over the 10 years ending December 2024. Those figures use a different endpoint from the mid-year 2025 results, so they should not be blended or presented as one continuous statistic. See the SPIVA India Year-End 2024 Scorecard.
These percentages describe how many funds in specified categories underperformed a specified benchmark during historical periods. They do not tell you the size of each fund’s underperformance, identify a future winner, or show that every active fund lagged. Historical results can inform a decision, but they are not a forecast. An index fund is not certain to outperform in the next decade, either.
For an SIP, the contribution schedule does not change those uncertainties. SIP means investing through periodic contributions; it is a way to invest, not a guarantee against loss or a substitute for deciding how much equity risk is appropriate. A long horizon may make equity exposure relevant to a goal, but it does not remove market risk or ensure profit.
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Why might an index fund be the simpler default?
A broad index fund makes its objective easier to evaluate: it seeks to track a stated index. You do not need to rely on a manager’s future ability to outperform for the strategy to make sense. It is also typically less expensive than an active fund, because passive funds generally have lower fund-management costs. SEBI’s July 2025 review describes passive expenses as typically lower; it does not set a universal fee difference for every pair of schemes.
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Scan for outdated or missing drivers - takes under a minuteDriver Scan →Clear out junk files and repair common Windows errorsFree Scan →Fix the driver behind crashes, sound loss and screen glitchesFind Drivers →Lower cost does not mean no cost, nor does it ensure the best result. An index fund’s return can fall short of its index because of its total expense ratio (TER) and the practical costs and constraints of running the portfolio. To assess the actual scheme, look at the TER and its tracking quality—not just the index’s headline return.
There is another trade-off: an index is a portfolio designed by rules, not a guarantee of balanced exposure. A market-cap-weighted index gives larger companies more weight, so its leading stocks or sectors can account for a substantial share of the portfolio. NISM reported that financial services represented about 35% of the Nifty 50’s weight as of March 2026. That figure applies to the Nifty 50 at that date; it should not be generalized to other indices. Check the index you are considering and understand what its methodology holds and weights.
When could an active fund make sense?
An active fund can be considered if you understand its mandate and want a manager to make portfolio choices in an attempt to outperform a relevant benchmark. The possibility of outperformance is not evidence that a particular scheme will deliver it after expenses, or that its past performance will continue.
Assess the fund against peers in its own category and the benchmark stated for its mandate. Compare periods consistently, and consider the portfolio and risk measures alongside returns. Do not infer skill from a short period of outperformance or compare a large-cap active scheme with a mid- or small-cap index: the strategies have different exposures, so the comparison would not answer whether the manager added value.
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An active fund may also have a different portfolio from a broad index. That difference can produce a different path of returns, for better or worse. A fund that has lagged for a stretch is not automatically a poor choice, just as a fund that has led is not automatically likely to keep leading. The relevant question is whether the mandate and risks still fit your plan, and whether you have a sound reason to expect the strategy to serve that plan.
How should you compare funds before starting an SIP?
Compare like with like, then decide whether either strategy fits your goal. SEBI’s investor guidance encourages comparing schemes with peers in the same category and equity schemes with relevant benchmarks. AMFI’s investor material points investors to scheme factsheets and metrics such as TER, SIP returns, tracking error, and risk measures.
- Match category and benchmark. First identify the scheme category and its stated benchmark. Compare an active fund to that relevant benchmark and to similar schemes—not to an index chosen simply because its name is familiar. An index scheme should be assessed against the index it is intended to follow.
- Use the same plan and option. Compare the same plan type (such as direct with direct, or regular with regular) and the same growth or distribution option. Different costs or payout treatment can make unlike comparisons misleading.
- Keep the period and return basis consistent. Review the same time periods and return conventions across the funds being compared. Past returns describe a period that has already happened, not what the SIP will earn in the future. SPIVA also cautions that past performance does not guarantee future results.
- Check the current TER in the factsheet. TER is an ongoing cost that affects returns. Check the current plan-level figure in the scheme factsheet rather than assuming every active or passive scheme has the same expense. AMFI advises investors to analyze TER and directs them to scheme factsheets.
- For an index fund, check tracking measures as well as cost. SEBI defines tracking error as “the annualized standard deviation of the difference in daily returns between the underlying index and the NAV of the Index.” In practical terms, it describes how variable the fund’s daily deviation from the index has been. Tracking difference is the realized return gap over a selected period. Check both measures, and make sure the fund and index figures use compatible return conventions.
- Look beyond returns at risk and holdings. AMFI’s listed comparison metrics include standard deviation, beta, Sharpe ratio, portfolio turnover and portfolio data. These can help put returns in context, but no single measure is a verdict. Review the portfolio and index construction too, especially concentration in a few stocks or sectors.
- Ask whether you can stay invested through declines. Equity values can fall, and a SIP does not protect against that. Consider the goal, time horizon, and your capacity to withstand losses before choosing an equity allocation. If you need advice tailored to your circumstances, consider an appropriately qualified adviser.
SEBI’s FAQs for Mutual Fund Investors explain index funds and tracking error. AMFI’s investor material on factsheets and comparison metrics is a place to review scheme information, including TER and risk measures. Check the scheme’s own current factsheet for its latest data.
What can go wrong with either choice?
With an index fund, the investor may mistake index returns for fund returns. Replication is an aim, not an exact match: compare the scheme’s actual tracking difference, tracking error and TER with the index’s results. A fund can have low expenses and still have a meaningful return gap over the period you care about. Also check whether the index itself is concentrated or mismatched to the exposure you want.
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Repair common Windows errors and clear accumulated junk for a smoother, more stable PC - no reinstall needed.Free scan · no reinstallWith an active fund, the risk is assuming that manager discretion necessarily adds value. It can instead result in underperformance, and expenses are typically higher than for passive funds. Assess net returns against the right benchmark and peers, and remember that a category-level underperformance rate cannot identify which individual scheme will outperform next.
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With either approach, investors can take on more equity risk than they can tolerate, or treat a contribution schedule as a promise of a positive result. A SIP spreads contributions over time, but the value of the investment remains exposed to market movements. If a goal or personal circumstances change, revisit the broader allocation and suitability rather than focusing only on whether the fund is active or passive.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.How should you use the SPIVA figures?
Use them as evidence about the difficulty many active funds have had in beating specified benchmarks over a specified historical period—not as a forecast or a fund shortlist. The mid-year 2025 figures cover 10 years through June 30, 2025; the year-end 2024 figures cover 10 years through December 2024. Their endpoints differ, and results can change with the measurement period.
They also answer a category-level question: what proportion of funds underperformed. They do not say how far each fund lagged or establish that an index fund is the better choice for every investor. The benchmark matters: a comparison only has meaning if it is appropriate to the fund category and exposure. Read the scorecard’s methodology and category definitions before using a percentage to inform a decision.
The available SPIVA evidence cited here runs through June 30, 2025. Before treating these as the latest available statistics, check whether S&P has published a newer official scorecard. In all cases, keep the report date and endpoint attached to the figures rather than describing them as current fund returns.
So which one should you choose?
For a long-term Indian equity SIP, an appropriately broad, low-cost index fund is a sensible starting point if your aim is market exposure and you do not want to rely on manager selection. Check its index composition, current TER and tracking quality. An active fund can still be a deliberate choice, but evaluate it against a relevant benchmark and peers, account for its costs and risks, and do not treat past outperformance as a promise.
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Neither strategy settles the more important portfolio question: how much equity risk belongs in your plan. Choose an allocation suited to your goal, horizon and ability to tolerate losses. A SIP is a contribution method—not a profit guarantee, a risk-control mechanism, or individualized investment advice.
Frequently Asked Questions
Is a SIP in an index fund safe?
An index fund is still an equity investment, so its value can fall when its holdings fall. Regular contributions do not guarantee profit or protect the invested amount from market losses.
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1Clear out junk files and repair common Windows errors2Fix the driver behind crashes, sound loss and screen glitches3Repair Windows errors before they cause bigger problemsCan an active mutual fund beat an index over 20 or 30 years?
It is possible, but the cited SPIVA results cover 10-year periods, not a promise about 20- or 30-year outcomes. The evidence here does not establish what any specific scheme will return over those longer horizons.
Does a lower tracking error always mean a better index fund?
Not by itself. Tracking error measures the variability of the fund’s daily return differences from its index; it does not state the size of the return gap over a whole period, so consider tracking difference and TER too.
Are SIP returns directly comparable with a fund’s one-year return?
Not necessarily: an SIP involves contributions made at different times, while a one-time investment return reflects a different cash-flow pattern. Compare figures that use the same return convention and period before drawing conclusions.
