Choosing between active and passive portfolio management is an important consideration when building an investment portfolio, whether you manage it yourself or use a Portfolio Management Service. An active strategy attempts to outperform a benchmark through security selection and portfolio decisions, while a passive strategy aims to track a market index. The difference affects more than potential returns. It can also influence investment costs, portfolio risk, diversification and the range of possible outcomes.
Understanding how passive portfolio management affects return and risk can help investors decide where an index fund, Exchange Traded Fund (ETF), or another passive investment fits within their overall portfolio, including one managed through a Portfolio Management Service.
What Is Passive Portfolio Management?
A passive portfolio management strategy aims to replicate the performance of a selected market index rather than outperform it. For example, a fund tracking the Nifty 50 generally invests in the companies included in the index and follows their respective index weights.
The portfolio is managed according to predefined rules. It does not involve a fund manager making frequent decisions based on individual company valuations, sector expectations, or market forecasts.
Active wealth management follows a different approach. An active fund manager researches securities and makes investment decisions to outperform a benchmark after accounting for costs.
This difference in approach affects both potential returns and the types of risks an investor takes.
Impact on Portfolio Returns
A passive fund is designed to track its benchmark, so its return before expenses is expected to remain broadly aligned with the index. It does not seek to generate additional returns through security selection.
An active strategy, by contrast, can outperform its benchmark. However, it can also underperform because of investment decisions, portfolio positioning or higher costs.
Data from the SPIVA India Scorecard illustrates how difficult it is to consistently outperform benchmarks. For the year ending December 2025, 75.0% of Indian equity large-cap funds underperformed the S&P India LargeMidCap, while 69.2% of ELSS funds underperformed the S&P India BMI. Mid- and small-cap funds showed stronger relative performance during the year, with 12.1% underperforming the S&P India SmallCap.
Over a longer period, active fund performance remained mixed. During the 10 years ending December 2025, 76.3% of large-cap funds, 82.9% of ELSS funds and 79.0% of mid- and small-cap funds underperformed their respective benchmarks.
These figures do not mean that active management cannot generate higher returns. Skilled managers may outperform their benchmarks. However, they highlight the challenge of identifying and consistently selecting funds that will outperform over extended periods.
Passive management therefore generally offers benchmark-linked returns rather than the possibility of significant outperformance. Actual returns can still differ from the benchmark because of expenses, tracking differences and other factors. Past performance does not indicate future returns.
Impact on Investment Costs
Cost is a key difference between passive and active management. Passive funds generally require less research and portfolio turnover because they follow an index. This can result in lower expense ratios than many actively managed funds.
Under the applicable mutual fund framework, regulators set limits on expense ratios. The actual expense ratio charged by a fund depends on its structure, assets and other applicable factors.
Even a small difference in annual costs can affect long-term investment outcomes because the amount saved on expenses remains invested and can potentially generate further returns.
For illustration, consider an investment of ₹10 lakh over 20 years. At an assumed annual return of 12%, the investment could grow to approximately ₹96.46 lakh. At an annual return of 11%, the value would be around ₹80.62 lakh.
This example does not represent actual fund performance. It simply demonstrates how a one-percentage-point difference in annual return can affect long-term compounding.
Unlike potential outperformance, lower costs are a relatively predictable feature of many passive investment products. Investors should therefore consider the expense ratio, tracking difference and other applicable costs when evaluating a passive fund.
Impact on Portfolio Risk
Passive portfolio management does not eliminate market risk. Instead, it changes the types of risks associated with wealth management.
Market Risk
A passive fund remains exposed to the market represented by its benchmark. If the underlying index declines significantly, a fund tracking that index can also decline. The strategy does not normally allow the portfolio manager to move substantially into cash simply because the market appears expensive or volatile.
Manager Risk
Passive investing reduces the risk associated with active security selection and individual fund-manager decisions. Since the portfolio follows predefined index rules, a change in the fund manager generally has less impact on the investment strategy.
However, this also means investors do not benefit from a manager successfully identifying securities that could outperform the index.
Concentration Risk
Passive funds inherit the composition of their underlying index. In a market-capitalisation-weighted index, companies with larger market capitalisations generally receive higher weights.
If a small number of companies or sectors represent a substantial portion of the index, investors in a passive fund tracking that index remain exposed to that concentration.
Tracking Difference
A passive fund may not exactly match its benchmark’s return. The difference can arise from expenses, cash holdings, transaction costs, rebalancing and other operational factors.
Tracking difference and tracking error can therefore be useful measures when comparing passive funds that follow the same benchmark.
Selection Risk
Investors choosing between active funds face the risk of selecting a fund that underperforms its benchmark or peers. When comparing passive funds tracking the same index, strategy differences are generally smaller, making factors such as cost and tracking quality more relevant.
Where Can Passive Investing Fit?
Passive strategies may suit investors seeking diversified exposure to a particular market index without relying on active security selection.
They can be particularly relevant in large-cap segments where many companies are widely researched and consistently outperforming the benchmark can be difficult after accounting for costs.
Active strategies may have a role in segments where investors believe skilled management can potentially add value. Market segments with greater differences between companies may provide more opportunities for active managers, although higher potential for outperformance also comes with the possibility of underperformance.
An investor does not necessarily need to choose one approach exclusively. A portfolio can combine passive and active investments based on investment objectives, risk tolerance, time horizon and asset allocation.
Passive vs Active: Key Differences
The following table highlights the key differences between passive and active wealth management across objectives, costs, risks and potential returns.
| Factor | Passive Management | Active Management |
| Objective | Track a benchmark | Attempt to outperform a benchmark |
| Investment decisions | Based primarily on index rules | Based on manager research and views |
| Cost | Generally lower | Generally higher |
| Market risk | Remains | Remains |
| Manager risk | Relatively lower | Higher |
| Outperformance potential | Limited relative to the benchmark | Possible |
| Underperformance risk | Mainly due to tracking difference and costs | Can result from investment decisions and costs |
Conclusion
Passive portfolio management can offer a structured approach to investing by tracking a chosen benchmark while generally keeping portfolio costs relatively low. It reduces reliance on active security selection and fund-manager decisions, but it does not remove market, concentration or tracking risks. Returns are expected to remain broadly aligned with the underlying index, subject to expenses and tracking differences.
Whether passive investing is appropriate depends on an investor’s financial goals, risk tolerance, investment horizon and preferred level of involvement. A portfolio may also combine passive and active strategies where appropriate. Regardless of the management style selected, asset allocation, diversification and investment discipline remain important factors in determining overall portfolio risk and long-term outcomes.