Mutual fund investors often blame market volatility for weak long-term returns. However, recent research suggests a different reality: costs, not markets, are the biggest drag on investor wealth. Over long periods, commissions embedded in Regular plans quietly but significantly reduce final outcomes—even when fund performance is identical.
To understand how this happens, it’s important to first see what cost compounding actually does.
How Commissions Create a 25% Wealth Gap (Illustrative Example)
Direct vs Regular Plan: Same Fund, Same Portfolio
| Investment Assumption | Direct Plan | Regular Plan |
| Initial Investment | ₹1,00,000 | ₹1,00,000 |
| Gross Annual Return (Portfolio) | 12% | 12% |
| Expense Ratio (TER) | 1.0% | 2.5% |
| Net Annual Return | ~11.0% | ~9.5% |
| Value After 10 Years | ₹2.84 lakh | ₹2.13 lakh |
| Wealth Gap | — | ~25% lower |
What this shows:
A seemingly small 1.5% annual cost difference compounds into a 25% loss of wealth over 10 years, despite identical portfolio performance.
What the Research Found
A study by 1 Finance Research confirms that this example reflects real investor outcomes.
Key findings include:
- Over a 10-year holding period, more than 80% of equity mutual fund schemes delivered at least 25% lower wealth to Regular-plan investors compared with Direct plans.
- Nearly one in five schemes showed wealth erosion exceeding 50%, purely due to higher expense ratios.
- Even over five years, 53% of schemes showed a return gap of 15% or more caused entirely by costs.
The analysis covered actively managed equity funds across large-cap, mid-cap, small-cap, and flexi-cap categories, using benchmark data recognised by AMFI.
Why the Gap Widens Over Time
The wealth erosion caused by commissions does not grow evenly. Instead:
- Costs compound every year
- The return base shrinks annually
- The gap accelerates with longer holding periods
This explains why the difference between Direct and Regular plans may appear manageable in the short term but becomes substantial over a decade or more.
Same Fund, Different Investor Outcomes
An important insight from the report is that this underperformance is not due to fund quality.
- Same fund house
- Same fund manager
- Same portfolio
Yet outcomes differ sharply based solely on the plan chosen. As the study notes, the erosion in Regular plans is structural, not episodic—it persists across market cycles regardless of performance conditions.
The Investor Discipline Paradox
The data reveals a counterintuitive pattern:
| Holding Period Behaviour | Regular Plans | Direct Plans |
| Investments held > 5 years | ~21.2% | ~7.7% |
Regular-plan investors actually stay invested longer. However, higher expense ratios reverse the benefit of long-term discipline, resulting in lower final wealth despite patience and consistency.
Final Takeaway
The message from the data is unambiguous:
Small annual costs compound into large long-term losses.
A difference that looks insignificant in a single year can translate into a 25–50% wealth gap over time. For long-term mutual fund investors, understanding expense ratios is not a technical detail—it is a core part of investment decision-making.
