By Meghna Sharma When investors compare mutual funds, they often look at returns, expense ratios, fund size and risk measures. Another useful metric is the Portfolio Turnover Ratio (PTR). It indicates how frequently a mutual fund’s portfolio is bought and sold during a particular period.
Portfolio turnover matters because frequent trading can generate additional brokerage and transaction costs. These costs can affect the fund’s overall expenses and, ultimately, the returns received by investors. However, a high turnover ratio does not automatically mean that a mutual fund is expensive or poorly managed. The impact depends on the fund’s strategy, trading efficiency, transaction costs and whether the additional trading generates enough value to justify those costs.
What Is Portfolio Turnover Ratio?
Portfolio Turnover Ratio measures the extent to which securities in a mutual fund portfolio are bought and sold during a specified period.
A commonly used approach is to calculate turnover using the lower of purchases or sales divided by the fund’s average assets or corpus over the relevant period. Some fund disclosures provide the turnover ratio along with other scheme information.
For example, if a fund has a PTR of 100%, it broadly indicates that trading activity equivalent to the fund’s average portfolio size has occurred under the calculation methodology used.
A lower ratio generally suggests a more buy-and-hold-oriented portfolio, while a higher ratio indicates more frequent portfolio changes.
Why Does Portfolio Turnover Affect Expenses?
Every time a mutual fund buys or sells securities, the transaction can involve costs.
These may include:
- Brokerage
- Exchange-related charges
- Clearing and settlement charges
- Regulatory levies
- Other execution-related transaction costs
- Taxes or statutory charges applicable to transactions
SEBI’s current mutual-fund framework specifically permits certain brokerage and transaction costs associated with executing trades to be charged to schemes, subject to prescribed limits and conditions. For example, brokerage for trade execution can be charged up to specified limits of trade value, while transaction costs include applicable regulatory levies and expenses charged by exchanges, clearing corporations and clearing houses.
Therefore, when a portfolio trades more frequently, the fund can incur more trading-related expenses.
Portfolio Turnover and Total Expense Ratio
The Total Expense Ratio (TER) represents the expenses charged to a mutual fund scheme relative to its assets. AMFI explains that TER includes the costs associated with operating and managing a scheme and that the expenses have a direct effect on the scheme’s NAV.
It is important, however, to understand that portfolio turnover and TER are not the same thing.
TER primarily captures the expenses charged under the applicable regulatory framework. Trading activity can create brokerage and transaction costs that have their own treatment under SEBI’s rules.
Under the current 2026 framework, the total expenses charged to a scheme can include the applicable base expense ratio, permitted brokerage costs, execution-related transaction costs and statutory levies.
This means investors should not assume that a fund with a 1% TER has no other economic impact from trading activity.
How Frequent Trading Can Reduce Investor Returns
Suppose a mutual fund buys and sells securities frequently. Even if every individual trade seems inexpensive, hundreds or thousands of transactions can add up.
Imagine a portfolio generates strong gross returns, but frequent trading creates substantial execution costs. These costs reduce the amount of value remaining for investors.
For example:
- Gross portfolio return: 12%
- Trading and other applicable expenses: 0.50%
- Other fund expenses: 1.00%
The investor’s effective return would be lower than the 12% gross return.
This is why evaluating a mutual fund only on its gross investment performance can provide an incomplete picture.
Does a High Portfolio Turnover Ratio Always Mean Higher Costs?
Not necessarily.
A high PTR means the portfolio has experienced substantial trading activity, but the relationship between turnover and total expenses is not perfectly proportional.
A fund manager may trade frequently because of:
- Changes in market valuations
- Portfolio rebalancing
- Changes in investment opportunities
- Risk management
- Corporate actions
- Changes in the fund’s investment thesis
- Investor inflows and redemptions
If the trades generate sufficient additional returns or improve portfolio risk management, the additional costs may be justified.
For example, a fund with a 150% turnover ratio could potentially outperform a lower-turnover fund by enough to compensate for its additional trading costs.
Therefore, turnover should be evaluated alongside performance rather than viewed in isolation.
Low Turnover Does Not Automatically Mean Better
A low-turnover fund may have fewer trading-related expenses, but that does not automatically make it a better investment.
Suppose Fund A has a 30% turnover ratio and earns 9%, while Fund B has a 120% turnover ratio and earns 14%.
Fund B may incur more trading costs, but investors could still receive better net performance if the additional trading creates sufficient value.
The correct question is not simply: “Does this fund have a high turnover ratio?”
Instead, investors should ask: “Has the fund’s trading activity historically added enough value to justify its associated costs?”
Portfolio Turnover in Different Fund Strategies
Turnover can vary considerably depending on the investment strategy.
Passive Funds
Index funds generally follow a benchmark and may have relatively limited trading, except when the index changes or the portfolio needs rebalancing.
Active Equity Funds
Actively managed funds may buy and sell stocks more frequently as fund managers adjust their portfolios.
Sector and Thematic Funds
These funds may experience higher turnover when the manager changes exposure based on sector or theme expectations.
Arbitrage Strategies
Some strategies can involve frequent buying and selling because their objective depends on exploiting price differences between markets or securities.
Therefore, comparing PTR across completely different categories can be misleading.
Portfolio Turnover and Fund Size
Fund size can also influence trading efficiency.
A very large fund may need to execute substantial transactions when entering or exiting positions. In some securities, particularly those with lower liquidity, large orders can affect execution prices.
This creates another potential cost: market impact.
Market impact occurs when a large trade influences the price at which the transaction is executed. It may not appear simply as a separate line item called “portfolio turnover cost,” but it can affect the effective performance of the portfolio.
Therefore, turnover should be considered together with the liquidity of the securities being traded.
Turnover Ratio vs Expense Ratio
These two metrics answer different questions.
| Metric | What It Indicates |
| Portfolio Turnover Ratio | How actively the portfolio’s securities are being bought and sold |
| Expense Ratio / TER | Expenses charged to the scheme under the applicable framework |
| Brokerage | Cost associated with executing trades |
| Transaction Costs | Applicable exchange, clearing and regulatory execution costs |
| Net Return | What remains after applicable costs and expenses |
A fund can have a relatively high turnover ratio but a competitive TER. Conversely, a fund with low turnover can still have a relatively high TER because expenses include many other components.
How Investors Should Use Portfolio Turnover Ratio
Investors can use PTR as a supporting metric, not as a standalone fund-selection tool.
When comparing funds, consider:
- Compare similar schemes. A turnover ratio that is normal for one strategy may be unusual for another.
- Check long-term consistency. One year’s turnover may be affected by exceptional market conditions.
- Compare turnover with returns. Higher trading activity is more meaningful if it has contributed to stronger net performance.
- Check TER separately. Turnover does not replace the need to examine the fund’s expense ratio.
- Consider liquidity. Trading in less-liquid securities can create higher execution costs.
- Review the investment strategy. Turnover should make sense in the context of the fund’s stated objective.
AMFI notes that frequent transactions can increase transaction costs, while also recognising that such trading may potentially generate additional profits. This is why estimating the precise future cost of portfolio turnover can be difficult.
How Investors Can Find the Relevant Information
Mutual fund investors can review a scheme’s portfolio disclosures, fact sheets, scheme documents and expense information to understand its trading activity and costs.
AMFI states that mutual funds are required to disclose TER information on their websites and on the AMFI website.
Investors should therefore examine PTR, TER, historical returns and the fund’s investment strategy together rather than relying on any single figure.
Conclusion
The Portfolio Turnover Ratio is an important indicator of how actively a mutual fund manages its portfolio, and frequent trading can increase brokerage, transaction and execution-related costs. These costs can ultimately affect the economic return available to investors.
However, a high turnover ratio is not automatically bad. Active trading may be justified when portfolio changes generate sufficient additional returns, improve risk management or help the fund implement its stated strategy effectively.
The key is to evaluate turnover in context. Investors should compare the fund’s portfolio turnover, TER, trading-related costs, net performance, strategy, liquidity and risk characteristics with comparable schemes.
In simple terms, portfolio turnover tells investors how much trading is taking place, while the expense ratio tells them about the expenses charged to the scheme under the applicable framework. Understanding the relationship between the two can help investors determine whether a fund’s active management is adding value or simply creating additional costs.