What a 1% expense ratio really costs you over 10 years
It sounds trivial. Because it compounds against you every year, a 1% ratio quietly erased ~8.6% of the corpus.
An expense ratio sounds trivial. "1% a year" — how much can that matter? The answer, because it compounds against you every single year, is: a lot more than the number suggests. Here is exactly what different expense ratios cost on a ₹10 lakh investment growing at 12% a year for 10 years.
| Expense ratio | Net return | Corpus after 10 yrs | Cost vs zero-fee |
|---|---|---|---|
| 0.0% (reference) | 12.0% | ₹31.06 L | — |
| 0.5% | 11.5% | ₹29.71 L | ₹1.35 L |
| 1.0% | 11.0% | ₹28.39 L | ₹2.67 L |
| 1.5% | 10.5% | ₹27.14 L | ₹3.92 L |
| 2.0% | 10.0% | ₹25.94 L | ₹5.12 L |
Why 1% becomes lakhs
The fee doesn't just take 1% of your money once. It takes roughly 1% every year, and — worse — it takes it from a base that would otherwise have kept compounding. Each year's fee removes a little principal and all the growth that principal would have earned in every subsequent year. Over a decade that lost compounding snowballs: a 1% ratio quietly erased about 8.6% of the final corpus in the example above. Stretch it to 20 years or a larger sum and the proportion grows.
The cheapest alpha in Indian mutual funds
This is why the single most reliable way to improve your returns isn't finding a better fund — it's paying less for the one you hold. Two levers:
- Direct plans over regular plans. Regular plans bake in a distributor commission, typically adding around 1% to the expense ratio versus the direct plan of the exact same fund. Same portfolio, same manager, ~1% cheaper — which, per the table above, is roughly ₹2.67 lakh over a decade. Every fund StockLearn tracks is the direct-growth plan for precisely this reason.
- Index funds where active managers don't earn their fee. In efficient segments (large cap especially), a low-cost index fund's expense ratio can be a fraction of an active fund's — and that fee gap is a head start the active manager has to overcome every year just to break even.
The one-line version
A percent of expense ratio is not a percent of your money — it's a percent of your money every year, compounded. Minimising it is the closest thing to free money in fund investing, and switching from a regular to a direct plan captures most of it in a single decision.
Key takeaways
- On ₹10 L at 12% over 10 years, a 1% expense ratio costs ~₹2.67 L — about 8.6% of the corpus.
- The fee compounds against you every year, so its impact grows with time and corpus size.
- Regular plans typically cost ~1% more than the direct plan of the same fund — a large, avoidable drag.
- Direct plans and low-cost index funds are the cheapest, most reliable return improvement available.
- StockLearn tracks direct-growth plans specifically to reflect the lower-cost reality.
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Browse today's scan →This article reports figures computed from StockLearn's own fund dataset (AMFI NAV data, direct-growth plans) over a specific period. It is educational research, not investment advice or a recommendation to buy or sell any fund. Past performance does not predict future returns.