What a fund’s yearly fee really costs you over time

Every fund charges a small yearly running cost called the TER (total expense ratio). On a broad index ETF it is often well under 0.25% a year. That sounds like a rounding error, so it is easy to ignore. Over a long savings horizon, though, it is the one cost you can see and control before you ever buy.

Why does a number under 1% still matter?

The fee is charged every single year, on your whole balance, whether the market rises or falls. A 0.20% fund and a 0.80% fund tracking the same index differ by 0.60% a year. On a balance that grows for decades, that gap quietly compounds, because the money paid in fees is also money that never gets the chance to grow.

How can I picture the difference?

The clearest way is to put real numbers in. Our fee calculator lets you set a monthly amount, a rough growth assumption and a fee, then shows what the fee adds up to over the years — no maths required. Try the same plan with two different TERs and watch the gap.

What this does not mean

A lower fee is not the same as a better fund, and it is never a recommendation. Two cheap funds can track very different things. The fee is one honest, comparable number among several — use it as a starting point, then look at what the fund actually holds and whether it fits what you are trying to do. This is education, not advice.