A fund charging 1% more in annual fees than another sounds like a rounding error — barely worth thinking about. But compounded silently over twenty or thirty years, that single percentage point can quietly eat a genuinely large slice of your final corpus, simply because fees are deducted every single year, compounding their drag right alongside your returns.
Here's the concrete comparison. ₹5,000 invested monthly for thirty years at a 10% return, with a 0.5% annual fee, might grow to a noticeably larger corpus than the identical investment in a fund charging 1.5% — a full percentage point higher. The difference isn't dramatic in any single year; it's the accumulation, year after year, of slightly less of your money working for you, that eventually adds up to a meaningfully smaller final number, sometimes amounting to several years' worth of contributions.
Why this matters more than most investors realise: market returns are unpredictable and largely outside your control — nobody can guarantee what a fund will earn next year. Fees, on the other hand, are knowable in advance and entirely within your control. Choosing a lower-cost fund is one of the few investing decisions where you can be certain of the benefit before a single rupee is invested.
The practical habit: before investing in any mutual fund, check its expense ratio — it's published and easy to compare across similar funds. Two funds tracking the same broad market can have meaningfully different fees, and over decades, the lower-cost one usually wins simply by getting out of its own way.