Expense Ratio Impact

Investments

The compounding impact of expense ratios on long-term wealth is one of the most underappreciated facts in personal finance. A 1% difference in annual expense ratio destroys 20-25% of the final corpus over 20 years. This is the primary reason to choose index funds and direct plans.

In detail

Visualising the damage:nRs 10L invested at 12% gross return for 20 years:n0% expense (impossible): Rs 96.5Ln0.1% expense (index fund): Rs 94.7Ln0.5% expense (good active): Rs 87.3Ln1.0% expense (typical active): Rs 80.1Ln2.0% expense (expensive): Rs 68.4LnnAt 0.1% vs 2.0%: Rs 26.3L difference on Rs 10L invested. The fund manager takes Rs 26.3L of your Rs 84.7L wealth growth just from fees.nnOver a 30-year career of SIP investing, this difference multiplies further -- the fee drag on compounding is exponential.

Formula

After-fee return = Gross return - Expense rationFinal corpus at t years = Principal x (1 + after_fee_return)^t

Real-life example

🇮🇳 India example

Two brothers start identical Rs 5,000/month SIPs at age 25 for 35 years (to age 60). Arun: index fund at 0.1% ER. Vijay: active fund at 1.2% ER. Both earn 13% gross return. Arun's corpus at 60: Rs 5.12 Cr. Vijay's: Rs 3.98 Cr. The 1.1% expense difference costs Vijay Rs 1.14 Cr over 35 years. One decision at age 25.

Frequently asked questions

Are there any cases where higher expense ratio is justified? ▼

Yes -- if the fund manager consistently generates 2%+ alpha (above-benchmark returns) over 10+ years. Subtract the 1.2% expense from that 2%+ alpha: still 0.8%+ net advantage over index. A small number of Indian mid/small-cap managers have achieved this. Large-cap active managers almost never justify their fees long-term. Check 10-year rolling alpha before paying for active management.