Investor Corner/The asset classes/Mutual Fund Core Concepts
2.3.7 Expense Ratio (TER)
The expense ratio, or TER, is the annual fee a fund charges, expressed as a percentage of its assets. It is deducted daily from the fund's returns, not billed separately, which makes it easy to overlook.
A cost you never see charged directly
Unlike a brokerage fee that appears as a line item, the expense ratio is built directly into a fund's NAV calculation every single day. An investor never receives a bill for it, and the fund's quoted return is already net of this cost, which is exactly why the fee is so easy to underestimate its cumulative impact.
The expense ratio, formally called the Total Expense Ratio (TER), is the annual fee that a mutual fund charges to manage your money. It covers the AMC's management fee, custodian charges, audit fees, registrar expenses and distribution costs (in Regular plans). It is expressed as a percentage of assets under management and is deducted daily from the fund's NAV. An expense ratio of 1.5% means that for every ₹1 lakh invested, approximately ₹1,500 per year goes toward fund expenses.
You never see this deduction as a separate line item. It is embedded in the NAV calculation: the fund's gross return minus the expense ratio equals the net return that shows up in your portfolio. This invisibility makes the expense ratio easy to ignore, but its compounding effect over long periods makes it one of the most important numbers in fund selection.
Why even a small difference compounds meaningfully
A fund charging 1.8% a year versus one charging 0.8% a year is giving up an extra 1 percentage point of return every single year, for as long as the money stays invested. Over two or three decades, that difference compounds into a genuinely large gap in final wealth, even though the two figures look close together on paper.
SEBI caps the maximum TER based on the fund's AUM size, with slabs that reduce the permitted expense ratio as AUM increases. For equity funds, the maximum ranges from 2.25% for the first ₹500 crore in AUM down to 1.05% for AUM above ₹50,000 crore, with additional permitted charges for certain expenses. Direct plans must have a lower TER than Regular plans by at least the distribution commission component. In practice, Direct plan TERs for large equity funds are typically 0.5-1.0%, and for index funds they can be as low as 0.05-0.20%.
The difference between a 0.10% expense ratio (a cheap index fund) and a 1.50% expense ratio (an actively managed Regular plan) is 1.4% annually. Over 25 years on a ₹1 crore corpus, that 1.4% annual drag amounts to roughly ₹40-50 lakh in lost wealth, assuming a 12% gross return. This is not a theoretical calculation; it is the actual cost difference that millions of investors pay without realising it. The expense ratio is the one factor in mutual fund investing that is both precisely known in advance and entirely within the investor's control.
How to use the number well
Expense ratio should be judged relative to the category a fund belongs to, since active equity funds naturally cost more to run than index funds or debt funds. Within any single category, a meaningfully higher expense ratio than peers is a cost that needs to be justified by genuinely better, sustained performance, not simply accepted without comparison.
How PriLytics helps. PriLytics tracks the true return on every fund after all costs, giving you the honest, net performance figure rather than a headline number. See holdings and returns.
When comparing funds, always compare expense ratios within the same category and plan type (Direct to Direct, Regular to Regular). A Direct equity index fund at 0.10% and an active Regular equity fund at 1.80% are not directly comparable on expense alone because they offer fundamentally different value propositions. But within the active large-cap category, choosing a Direct plan with a 0.60% TER over one with a 1.20% TER, assuming similar performance, is a straightforward improvement.