What fund fees really cost you over 30 years
A 1% yearly fee sounds harmless. Over 30 years, it can quietly eat a third of what you would otherwise have kept.
👉 Change the numbers above — it’s your money, your assumptions.
How a small % becomes thousands
Put in €10,000 for 30 years at a 6% assumed return. A fund charging 0.20% a year leaves you with noticeably more than one charging 1.0% — often several thousand euros more, on this single lump sum alone. Slide the fee in the tool above from 0.1% to 1.0% and watch the red 'lost to fees' bar grow.
The fee is the Le coût annuel de fonctionnement du fonds, exprimé en % de votre argent. 0,20 € pour 100 € par an à 0,20 %. Plus bas est moins cher. More → — the fund's yearly running cost, taken automatically whether the fund goes up or down.
Why the gap grows every single year
A fee is not a one-off. Each year it is skimmed off your whole balance — including all the growth from previous years. So the euro amount the fee takes gets bigger as your pot gets bigger, and the money it removes never gets the chance to compound for you. That is why a 0.8% difference looks trivial in year one and enormous by year 30.
What counts as cheap?
For a broad, plain index ETF (think a whole-world or S&P 500 tracker), a Le coût annuel de fonctionnement du fonds, exprimé en % de votre argent. 0,20 € pour 100 € par an à 0,20 %. Plus bas est moins cher. More → of about 0.05% to 0.25% a year is normal and cheap. Niche, actively managed or thematic funds often charge 0.5%-1.5%+. A higher fee is not automatically 'bad' — but it is a real, guaranteed cost you pay every year regardless of performance, so it deserves a reason.
