Expense ratio: what 2% a year costs

The expense ratio is the share of your money a fund takes each year to run it. Two things make it bite harder than it looks: it's charged on the whole balance, not just the year's gain, and it's charged every year, winning or losing.

Take 100,000 that grows 5% to 105,000 before the fee. A 2% fee is 105,000 × 0.02 = 2,100 — which is 42% of the 5,000 of growth. After the fee you hold 102,900, an effective 2.9% for the year, not 5%.

A fee quoted as a small percentage of your money is a large percentage of your return, because the return is the small part. That gap is the whole reason a 2% fee and a 0.3% fee are not close.

A yearly fee doesn't just cost this year's slice — every hryvnia it takes stops growing for all the years that follow. That is why fees compound, and why two fee levels that look close pull apart like scissors over time.

Dana's plan: 36,000 a year for 20 years, 5% assumed before fees. The dataset's last row shows 1,205,453 with a 0.3% fee and 985,323 with 2% — a gap of 220,130. After 10 years the gap was only 44,389; it more than quintupled in the second decade, although nothing about the fees or contributions changed.

So a fee's damage grows with the time horizon. Over a few years 1.7% is minor; over twenty it is a sum larger than six years of Dana's contributions.

A fee measured against your whole balance looks trivial; measured against your growth — the only part the fee competes with — it shows its real size.

Dana puts in 720,000 over twenty years. With no fee she'd end at 1,249,893, so the growth is 529,893. The 2% fee leaves 985,323, meaning it took 1,249,893 − 985,323 = 264,570. As a share of growth: 264,570 / 529,893 ≈ 49.93% — about half. The 0.3% fee takes only about 8.39%.

Always compare a fee with the return, not the balance. "2% a year" sounds like a rounding error on your money; on the growth your money actually produces, it can be half.

A fee is certain; the return is not. In a weak market a flat yearly fee can swallow all of the real growth and then some, leaving you with less than you put in.

With 2% a year before fees, a 2% fee leaves 1.02 × 0.98 = 0.9996 of the balance each year — just below break-even. Over Dana's twenty years of contributions that turns 720,000 into 716,984 with the 2% fee, against 862,917 with a 0.3% fee. The fund "earned" something before fees, yet the investor lost ground.

This is why a high fee is never justified by a hoped-for high return: the extra return is a maybe, the fee is a certainty. A fee you can't avoid should be as small as possible, especially when the market itself is thin.

Before a first purchase, list every cost, not just the headline fee. Each one quietly takes a slice:

• the fund's yearly fee (the biggest over decades),
• a one-off entry fee to join the fund,
• the broker's commission on each purchase,
• the exchange spread when hryvnias become dollars or euros,
• tax on the gain when you sell.

One thing on the consultant's pitch is not a cost: last year's return. It's a sales point, it takes nothing from you, and it says little about the next twenty years.

You can't control what the market returns, but costs are one of the few things you do control. A clear list of them, totted up before you buy, is worth more than any promise about performance.