Investment charges are quoted as small annual percentages, which makes them sound negligible. Over long periods they compound against you in exactly the way returns compound for you.
This describes how the arithmetic works. It is not advice about what anybody should hold, and anybody making decisions about their own money should be speaking to a regulated adviser.
The mechanism
A charge levied annually as a percentage of the amount invested is deducted from the balance, which means it reduces both this year's value and every subsequent year's growth on that value.
Which is compounding, applied in reverse.
The consequence is that the total cost over a long holding period is far larger than the annual figure suggests, because you lose the charge and the growth the charge would have produced.
The scale over decades
Worth seeing arithmetically rather than described.
Consider two otherwise identical investments over thirty years, one charging half a percent annually and one charging one and a half percent.
The difference is one percentage point a year, which sounds small.
Over thirty years, that difference compounds into a substantial proportion of the final balance — analyses of this consistently find the gap running to a quarter or more of the total, depending on the assumed return.
Regulators in several jurisdictions have published exactly this comparison, precisely because the annual figure understates the effect so badly.
The charges that exist
More numerous than the headline figure suggests.
The fund's own ongoing charge, covering management and operation.
Platform or administration charges, levied by whoever holds the investment.
Transaction costs within the fund, which arise from buying and selling holdings and are separate from the ongoing charge.
Adviser charges, where advice is provided.
And in some products, exit charges, performance fees and bid-offer spreads.
The total is what matters, and disclosure regimes in several jurisdictions now require an aggregate figure precisely because the components were previously scattered.
What the disclosure documents show
Worth knowing where to look.
Standardised disclosure documents are required for many retail investment products, stating charges and illustrating their effect over defined periods.
These are frequently short and are almost never read.
The figure to find is the total ongoing cost including transaction costs, rather than the headline management charge, since the two can differ meaningfully.
What charges buy
Being fair, since low cost is not automatically better.
Active management, where a manager selects holdings, costs more and may or may not deliver a return that justifies it. The evidence on this is discussed elsewhere and is not encouraging in aggregate.
Advice, which for people with complex circumstances has genuine value and is a separate service from the investment itself.
Administration, custody and regulatory compliance, which are real costs and are not zero.
Which means the question is not whether charges are low but whether what they buy is worth what it costs, and that is answerable rather than rhetorical.
The comparison that is actually useful
Total cost as a percentage, across everything, compared between the options actually available to you.
Regulators publish comparison tools in some markets, and disclosure documents allow the calculation elsewhere.
Doing it once, for whatever you currently hold, is an hour and frequently reveals a total considerably above what the person holding it believed.
The behavioural point
Which is larger than the arithmetic for many people.
Costs are certain and returns are not, which is why cost is the one variable in investing that can be controlled with confidence.
It is also the variable that receives least attention, because a percentage point of charges is invisible while a percentage point of market movement is reported daily.
That asymmetry in attention is worth correcting, and correcting it requires nothing but reading a document that already exists.
Where to find the actual number
Practical, since it is rarely presented prominently.
Standardised disclosure documents state ongoing charges and illustrate their effect, and providers are generally required to make them available before purchase.
Annual statements in many jurisdictions must show charges in currency terms rather than only as a percentage, which is considerably more legible.
Platform charges appear separately from fund charges and must be added together, which is the step most often skipped.
Adding the components once, for whatever you hold, produces a total that is frequently higher than expected and is the only figure worth comparing.
The comparison to make
Not whether a charge is low in absolute terms, but what the equivalent product costs elsewhere for the same service, and whether the difference over your intended holding period justifies staying.
Transaction costs within a fund
The component most often missed entirely.
A fund incurs costs when it buys and sells holdings, and those are borne by the fund rather than appearing in the headline management charge.
Funds that trade more incur more, which is one reason turnover is worth looking at alongside cost.
Disclosure regimes in several jurisdictions now require transaction costs to be reported, which makes the total visible where it previously was not.
The figure is generally small relative to the ongoing charge and is not zero, and it compounds in the same way as everything else.