How pension fees compound

Updated 12 June 2026

Pension charges look small — 1% here, 0.75% there. But an annual management charge is taken from your whole fund, every year, for decades, and that changes its character entirely.

The mechanics

An AMC reduces your effective growth rate. A fund growing at 5% a year with a 1% AMC actually compounds at roughly 3.95% — the charge is applied to the whole balance, not just the gains. Run that gap for 30 years and the arithmetic is stark:

€100,000 left invested for 30 years at 5% annual growth becomes about €432,000 with no charges, about €324,000 with a 1% AMC, and about €243,000 with a 2% AMC.

The difference between 1% and 2% in that example is over €80,000 — roughly a quarter of the final fund. Nothing about the investment changed; only the charge did.

Contribution charges work differently

A contribution charge is a one-off percentage taken from each payment before it is invested. A 5% contribution charge means €95 invested per €100 paid in — equivalent to losing 5% of every contribution’s entire future growth. It hits hardest on money contributed early, which has the longest to compound.

Three things follow

Time horizon multiplies the effect. The same AMC difference matters far more at 30 than at 60, because it compounds over more years.
Percentages hide the scale. “1% AMC” sounds like 1% of something small. Expressed in euro over a saving lifetime — as our fee calculator does — the published ranges differ by tens of thousands.
Charges are knowable in advance. Future investment returns are uncertain; published charges are a fact, listed for every approved PRSA in the Pensions Authority’s register.

Charges are still only one factor. A fund’s investment mix, your contribution level, and your time horizon typically matter more to the final outcome than the charge alone — and weighing all of them for your situation is a job for a regulated advisor.

This guide is general information, not financial advice or a product recommendation. The worked examples are mathematical illustrations at an assumed constant growth rate, not projections of any product. ComparePensions is not regulated by the Central Bank of Ireland.