The TER is the number that tells you what owning a fund or an ETF actually costs. It is expressed as an annual percentage of assets, it is deducted day by day from the value of each unit, and it is never charged to your bank account. That is precisely why most savers never notice they are paying it.
Take €10,000 (about $10,800) invested for thirty years at a 7% gross annual return. A TER of 0.20% leaves you with roughly €71,900. A TER of 1.80% leaves you with roughly €45,700. The gap is more than €26,000 — over twice the initial capital — produced by a single small line item that looks, on the subscription document, like nothing more than a number with two decimal places.
Here is what the TER is, how it is calculated, what it covers and, above all, what it never covers.
What the TER is
The TER (total expense ratio) is a cost indicator that measures the overall expenses incurred to run and operate an investment fund, whether a mutual fund or an ETF. In the United States the same metric is usually called simply the expense ratio.
The figure is expressed as an annual percentage of the fund’s assets. A TER of 0.20% means that every year 0.20% of the invested capital is absorbed by the product’s running costs.
The deduction mechanism is the reason this cost stays invisible: it is not billed separately but subtracted daily from the unit value, in proportion to assets. The investor only ever sees the final net figure, never the amount paid along the way.
In European terminology the same concept appears as ongoing charges. The two expressions overlap to a large extent, but they are not perfectly equivalent — and the difference concerns an item that can weigh quite a lot, as we will see.
How the TER is calculated
The calculation is a simple division:
TER = (total fund costs / average fund assets) x 100
The result is the percentage of assets effectively absorbed by costs over a given period, normally the financial year. Because the denominator is the average assets over the period rather than the closing figure, the published TER is a backward-looking number: it photographs what the fund cost over the year just ended, not what it will cost next year.
In small funds, certain fixed expenses — auditing, legal compliance, administrative charges — weigh proportionally more. A fund that grows its asset base tends to see its TER fall, while a fund that bleeds assets sees it rise.
What the TER includes
The TER bundles the fund’s recurring operating costs into a single number:
- management fees, by far the heaviest item, which pay the asset manager and, in products distributed through bank networks, the distributing bank via retrocessions (commission rebates)
- depositary bank fees, for the custody of the securities
- administrative and operating costs: auditing, legal expenses, recordkeeping, publication of mandatory documents, communications to unitholders
Under the European definition of ongoing charges, performance fees — those triggered when a fund beats its benchmark or a preset threshold — are excluded and must be disclosed separately. In Italian market practice, the TER shown in some documents includes them in the total instead.
That means two funds both advertising a «TER of 1.60%» can carry different real costs, if one figure includes the performance fee and the other does not. Check what is inside the number before comparing. With ETFs the problem rarely arises, because performance fees are effectively absent.
What the TER never includes
Now the perimeter of what the indicator does not measure:
- internal transaction costs: what the manager spends buying and selling portfolio securities, including brokerage commissions and spreads. The higher the portfolio turnover, the higher these are — in an actively managed fund they can be worth several tenths of a percentage point
- subscription and redemption fees (front-end and back-end loads), typical of funds sold over the counter, paid once on the way in or on the way out
- the bid-ask spread, the gap between buying and selling price paid on every ETF trade on the exchange
- your broker’s commissions, which depend on the bank or platform you use, not on the product
- Italy’s 0.20% annual stamp duty on the value of the securities account (a local levy with no direct US equivalent)
- taxes on returns: in Italy, 26% on capital gains for most instruments and 12.5% for government bonds and equivalent securities
An ETF with a 0.15% TER bought on a platform that charges €2 per order on a €100 trade costs, in practice, far more than 0.15%: the commission alone burns 2% of every contribution.
Where to find the TER: the KID
Until 2022, summary cost information for UCITS funds was contained in the KIID, the Key Investor Information Document. Since January 1, 2023 the KIID has been replaced by the KID (Key Information Document) established by European Regulation 1286/2014 on PRIIPs, extended from that date to UCITS and open-ended AIFs aimed at retail clients, under resolution no. 22551 of December 21, 2022 issued by Consob, the Italian market regulator.
Anyone looking for the TER today has to open the KID, a short pre-contractual document the manager is required to provide free of charge before subscription, available on the issuer’s website as well as on specialist portals. (US investors will find the equivalent disclosure in the fund prospectus and summary fact sheet.)
The section to open is «What are the costs?», which contains two tables:
- costs over time, with the amount in euros and the annual impact — that is, by how much costs reduce the return each year if you hold the investment for the recommended holding period
- composition of costs, which breaks the total down into entry costs, exit costs, ongoing costs, portfolio transaction costs and incidental charges
The line to look for is «ongoing costs» or «ongoing charges» — that is the one corresponding to the TER. The PRIIPs KID introduced one significant improvement over the old KIID: the explicit disclosure of portfolio transaction costs, which previously remained essentially invisible.
How much does it cost?
A percentage means nothing without a yardstick. These are the typical ranges on the Italian market, broadly in line with the European picture:
| Type of instrument | Indicative annual TER |
|---|---|
| Government bond ETFs | 0.05% - 0.20% |
| Equity ETFs on global or developed-market indexes | 0.10% - 0.25% |
| Unlisted index funds | 0.20% - 0.50% |
| Sector, thematic or emerging-market ETFs | 0.30% - 0.75% |
| Balanced and flexible mutual funds | 1.20% - 2.00% |
| Actively managed equity mutual funds | 1.50% - 2.50% |
| Discretionary managed accounts | 2.00% - 3.00% |
According to the annual report on the costs and performance of retail investment products published by ESMA, the European Securities and Markets Authority, the management costs of an equity ETF sit at around 0.2% a year, against roughly 2% for the total cost of an actively managed equity fund — a ratio of ten to one.
An Italian active fund involves the asset manager that builds the portfolio, the bank that distributes it and collects a retrocession (often the largest slice of the total), and the depositary bank. Every layer takes its cut. An index ETF replicates an index automatically, with no distribution network: the cost structure is incomparably lighter.
It is also fair to say that a higher TER is not a defect in itself, if it corresponds to a service that generates value. The problem is that long-run empirical evidence shows only a very small share of active funds are able to systematically beat their own benchmark net of costs.
The effect of the TER on long-term returns
The impact of the TER grows with time, because every euro taken by costs is a euro that stops compounding.
Take €10,000 invested at a 7% gross annual return, comparing a TER of 0.20% with one of 1.80%, assuming a constant 7% gross annual return, annual compounding and a single lump-sum investment:
| Horizon | TER 0.20% | TER 1.80% | Difference |
|---|---|---|---|
| 10 years | €19,320 | €16,590 | €2,730 |
| 20 years | €37,280 | €27,560 | €9,720 |
| 30 years | €71,970 | €45,750 | €26,220 |
Note: taxes, trading commissions and stamp duty are not included. At an exchange rate of roughly $1.08 per euro, the thirty-year outcomes translate to about $77,700 versus $49,400, a gap of some $28,300.
At ten years the difference is 27% of the initial capital; at thirty years it exceeds 260%. One and six tenths of a percentage point in annual costs, sustained across a working life, eats more than the amount originally invested. It is the same mechanism as compound interest, applied in reverse.
The TER is already reflected in performance
Because the TER is deducted daily from the unit value, the returns published by funds are already net of the TER. A factsheet reporting «+8.4% over the last year» is showing a figure from which ongoing costs have already been subtracted.
Anyone who reads that number and then subtracts the TER again is double-counting. And anyone comparing the historical returns of two different funds is already comparing results net of their respective costs; subtracting the TER difference a second time distorts the comparison.
The TER still matters, because it is what allows you to estimate the future cost of the instrument, at a time when the gross return is unknown.
Tracking difference and total cost of ownership
For ETF investors, stopping at the TER leads to suboptimal choices. Two further concepts are needed.
Tracking difference measures the gap between the index return and the return actually delivered by the ETF over a given period. It therefore captures in a single number everything that happened: ongoing costs, transaction costs, tax efficiency on dividends, securities lending revenue, quality of replication.
An ETF with a 0.10% TER may have a tracking difference of 0.40%, while another with a 0.30% TER may stop at 0.10%: the second one, despite triple the headline cost, has been more efficient. In some cases the tracking difference is even negative — the ETF beat its own index — which happens when securities lending revenue and withholding-tax advantages more than offset management costs.
Not to be confused with tracking error, which measures the volatility of that gap over time, that is, the stability of the replication rather than its cost. For the long-term investor, the priority metric is tracking difference.
TCO (total cost of ownership) adds the product’s internal costs to those that depend on the investor and the broker:
TCO = tracking difference + bid-ask spread + trading commissions + stamp duty + taxation
On large, heavily traded ETFs the spread is contained, but on niche products or those with small asset bases it can become the heaviest item, comfortably exceeding any saving obtained by picking a lower TER.
For those investing small amounts monthly, the variable to watch most closely is instead fixed trading commissions. Two euros of commission on a €100 contribution is worth 2%, ten times the TER of a global equity ETF. Before even choosing the product, it is worth checking whether your platform offers zero-cost accumulation plans (the European equivalent of an automated dollar-cost-averaging plan).
How to use the TER
Summed up as an operating procedure:
- open the product’s KID — or, in the US, the prospectus and summary fact sheet — and read the «What are the costs?» section, checking both ongoing costs and portfolio transaction costs
- check for entry and exit fees, which do not appear in the TER and which can be significant in funds sold over the counter
- compare only homogeneous products: it makes sense to compare two instruments replicating the same index or operating on the same market, not a global equity fund against a bond fund
- for ETFs, check the average tracking difference over the last three years, which is a more faithful approximation of the real cost than the headline TER
- add your own broker’s costs, which on small amounts and frequent contributions weigh more than any other item
Editor’s note
This article was originally published in Italian on money.it by Ufficio Studi Money.it on August 21, 2026 as «Cos’è il TER (Total Expense Ratio), spiegato bene». It has been translated and adapted for an international audience by the Money.it International desk.
