In short: The total cost of owning an ETF extends beyond its ongoing charge (TER). While internal fund management costs are deducted continuously from fund assets, an investor may encounter exchange bid-ask spreads, broker order commissions, platform custody charges, and currency conversion fees. Tracking difference measures actual return relative to the benchmark index, rather than an extra fee.
What does investing in an ETF actually cost?
When you invest in an ETF, costs arise at three distinct layers. Understanding these layers prevents surprises and clarifies how fees affect long-term wealth accumulation:
- Costs inside the fund: The recurring ongoing charges (TER or OCF) and internal portfolio transaction costs. These are deducted automatically from fund assets, meaning you never receive an invoice.
- Costs during execution: The broker order fee and the stock exchange spread incurred each time you buy or sell fund units.
- Costs of the account: Ongoing platform, custody, or currency conversion charges billed by your broker or depository.
The ETF cost map: all fee layers at a glance
This cost map summarises each fee category, who collects it, how it is deducted, and where to inspect detailed explanations:
| Cost category | Charged by | How you pay it | Deep explanation |
|---|---|---|---|
| Ongoing fund charges (TER) | Fund manager | Deducted daily from Net Asset Value | What is TER? |
| Internal transaction costs | Fund portfolio | Deducted within fund during rebalancing | Factsheet & KID guide |
| Tracking difference | Fund vs index | Net annual performance gap | Tracking difference |
| Bid-ask spread | Stock exchange | Half-spread upon buy and sell orders | How spreads work |
| Broker order fee | Broker platform | Transaction commission per trade | Order fee details |
| Custody / platform fee | Broker platform | Periodic fee for holding account | Custody fees |
| Currency (FX) fee | Broker platform | Spread markup on foreign exchange | Currency fee guide |
| Dividend leakage | Tax treaties | Withholding tax drag inside the fund | Dividend leakage |
What is TER or OCF, and what is included?
The Total Expense Ratio (TER), frequently labelled ongoing charges in Europe, is the annual percentage of a fund’s assets deducted to cover fund operations. It covers portfolio management, administration, custody of underlying securities, independent auditing, legal registration, and the benchmark index licence.
Ongoing charges are deducted incrementally each day from the fund’s Net Asset Value. The price you see on your exchange screen already reflects these subtractions. However, the TER does not cover everything: internal portfolio trading costs, synthetic swap fees, broker dealing fees, and currency conversions are excluded.
Which costs arise when an ETF buys and sells shares or bonds?
Beyond operating overhead, an ETF trades underlying securities when index constituents change or when new investor capital is deployed. These internal transaction costs include explicit broker commissions, transfer taxes, and implicit market impact costs incurred within the fund.
Under EU PRIIPs regulatory technical standards (Commission Delegated Regulation (EU) 2017/653 as amended by Delegated Regulation (EU) 2021/2268), UCITS funds have disclosed portfolio transaction costs as a stand-alone line in the Key Information Document (KID) since 1 January 2023. Because of prescribed arrival-price formulas, this calculation can occasionally produce a negative figure in a given year, reflecting price movements during order execution rather than trading profits.
Is tracking difference another fee?
No. Tracking difference is not a separate fee, commission, or invoice. It is an ex-post performance comparison measuring the difference between the ETF’s net total return and the total return of its underlying index over a specific observation period.
While ongoing charges reduce returns, tracking difference can be positive or negative. Factors influencing this gap include management expenses, cash drag, replication methods, securities lending income, and the handling of foreign withholding taxes to reduce dividend leakage. In contrast, tracking error measures the volatility (annualised standard deviation) of return differences over time, rather than the total return gap itself. Past performance does not guarantee future results.
This is general information, not tax or investment advice. For your own situation, consult a qualified tax adviser, a financial adviser licensed by the AFM (the Dutch financial markets authority) or the Belastingdienst.
What is the bid-ask spread when buying or selling on an exchange?
When you place an order on an exchange, you encounter two prices: the bid price (the highest price buyers offer) and the ask price (the lowest price sellers accept). The difference between the two is the spread. It represents an implicit trading cost resulting from market transactions.
When purchasing at the ask price, you pay approximately half the spread relative to the midpoint; upon selling at the bid price, you pay another half. Designated market makers ensure spreads remain competitive on electronic order books. Spreads vary significantly depending on underlying market liquidity, execution venue, and trading hours, widening noticeably outside primary market trading sessions.
What broker costs can apply when you trade?
To acquire ETF units, retail investors use an authorised broker. A broker fee schedule can contain various terms, but most fees fall into eight core concepts detailed in our how a broker works guide:
- Order fee: The per-transaction commission billed for routing and executing a trade. A zero-commission offer does not mean trading is entirely free of spread or exchange costs.
- Spread: The price gap between buyer and seller quotes on the exchange.
- Currency (FX) fee: Conversion charges applied when buying an instrument denominated in a foreign currency.
- Custody or platform fee: Periodic administrative charges for holding securities in custody accounts.
- Settlement fee: External clearing or regulatory fees passed on upon completing an order.
- Savings plan: Automated scheduled investing plans that frequently reduce or waive dealing commissions.
- Fractional shares: The facility to purchase portions of whole fund units by monetary value.
- Investor compensation scheme: Statutory protection frameworks that protect segregated client holdings if an institution fails.
Stazora does not name, rank, or recommend individual brokers on this page. Fee structures differ across providers. For an independent overview of custody rules and platform features, consult our neutral broker comparison.
When do foreign-exchange (FX) conversion costs apply?
Foreign exchange fees apply when your brokerage account currency differs from the trading currency of the ETF on the exchange. In that event, the platform converts funds and typically charges a currency conversion fee or markup.
Importantly, buying a fund that invests in international assets (such as US equities) but trades in euros on European exchanges does not trigger a broker currency conversion charge. Under European MiFID II rules, investment firms must disclose the currencies involved, applicable conversion rates, and conversion costs before executing your trade.
Where are costs shown in the ETF KID?
Under European Union PRIIPs legislation, fund manufacturers must produce a standardised Key Information Document (KID) of maximum three pages before retail investors buy a fund. The document includes a dedicated “What are the costs?” section:
- Costs over time table: Demonstrates the cumulative monetary and percentage impact of total fund costs across different holding periods (such as 1 year and recommended holding periods).
- Composition of costs breakdown: Separates costs into one-off entry and exit charges (usually 0% on secondary-market exchange trades), ongoing charges (management and administrative expenses), portfolio transaction costs, and incidental performance fees.
The KID focuses on product-level costs. It excludes distribution and broker charges paid directly by the investor to their broker, which are disclosed separately under MiFID II.
What is the difference between a PRIIPs KID and MiFID II cost reporting?
The PRIIPs KID and MiFID II cost disclosures serve complementary functions in European investor protection:
- PRIIPs KID (Product costs): Prepared by the fund issuer (such as Vanguard or iShares) using regulatory technical standards. It outlines the internal costs of the fund itself.
- MiFID II ex-ante disclosure (Pre-trade estimate): Provided by your broker before you execute a trade. It aggregates both product costs and investment service charges (order commissions, custody, and currency conversions) for that specific financial instrument and transaction size.
- MiFID II ex-post statement (Annual review): Provided by your broker at least annually, showing the actual aggregated costs and charges incurred over the prior year.
Worked example: how ongoing fund charges (TER) compound over 10 years
Here is what happens when you combine trading friction with ongoing fund costs in a concrete example. Note that this simulation computes ongoing fund charges (TER) only: broker transaction commissions, custody charges and bid-ask spreads are not included in the calculation.
Imagine you buy for €10,000. The bid is €99.98 and the ask is €100.02. The midpoint is €100.00 and the spread is €0.04, which equals 0.04%. Buying at the ask costs you half the spread against the midpoint: 0.02% of €10,000 is €2. If ongoing charges are 0.20% a year, holding €10,000 costs about €20 in the first year. If portfolio transaction costs inside the fund are 0.02% a year, that adds about €2. Together in year one, you pay about €24 in fund-level costs, plus whatever order fee your broker charges.
Over longer periods, ongoing costs compound across your entire portfolio balance. Below is what our simulation engine calculates for a one-off deposit of €10,000 with no monthly deposits over a period of 10 years, assuming 6% a year before costs, an illustrative assumption, not a forecast. In the comparison, 0.14% represents the ongoing charge of our default global fund (VWCE), while 1.50% represents a typical actively managed fund:
| Ongoing costs | 0.14% | 1.50% |
|---|---|---|
| Deposited | €10,000 | €10,000 |
| Without costs | €18,194 | €18,194 |
| After costs | €17,942 | €15,670 |
| Costs in total | €252 | €2,524 |
Sources
- Tracking error definition and disclosure: ESMA, Guidelines on ETFs and other UCITS issues, checked 19 October 2026.
- Ongoing costs of 0.14%: Vanguard FTSE All-World UCITS ETF, key information document, checked 19 October 2026.
- Figures computed with the site’s own calculation engine, explained on How it works.
Investing involves risk of loss. The figures presented by this calculator are for illustrative purposes only and do not constitute financial advice. Past performance does not guarantee future results.
You can adjust these numbers and enter your own fund costs in the ETF calculator:
Which documents should you check before placing an order?
Before confirming an order, review these primary documents to verify all cost layers:
- The fund KID: Review the three-page Key Information Document on the issuer’s website or broker portal to check the ongoing charges and portfolio transaction costs.
- The broker ex-ante cost estimate: Check the pre-trade cost summary generated before confirming your order. It outlines order commissions, settlement fees, and applicable currency conversion costs.
- The exchange order book: Verify current bid and ask prices during active European exchange trading hours to minimise spread drag.
Frequently asked questions about ETF costs
Is the TER the only cost when investing in an ETF?
No. The TER covers internal fund management and operational expenses. In addition to the TER, investors may encounter broker order commissions, exchange bid-ask spreads, custody fees, internal portfolio transaction costs, and currency conversion markups. Consult our FAQ on costs for further details.
Do investors receive an annual invoice for ongoing fund charges?
No. Ongoing charges are deducted incrementally from the fund’s net asset value each day. Quoted exchange prices and fund performance figures already reflect these deductions, so you never receive an invoice or direct bank debit for the TER.
Are broker commissions included in the ETF Key Information Document?
No. The PRIIPs KID outlines product costs incurred within the fund. Dealing commissions, custody fees, and account charges billed by your broker are separate service fees disclosed under MiFID II regulations.
How do trading hours affect bid-ask spreads?
Spreads are generally narrowest when underlying constituent markets and European exchanges are both open simultaneously. Trading outside regular exchange hours or during periods of heightened market volatility typically results in wider spreads and higher trading friction.
Related pages and tools
- ETF Calculator: calculate the compounding drag of different cost levels over time.
- Compare ETF costs: compare ongoing charges of two funds side by side.
- How to read a factsheet and KID: a section-by-section walkthrough of official fund disclosures.
- How a broker works: an explanation of order fees, spreads, and custody terms without marketing.
- ETF Glossary: definitions of core investing terms from TER to tracking difference.
- FAQ: Funds and brokers: practical questions about selecting and purchasing funds.
Where do these cost figures and rules come from?
- European Commission: Key Information Documents for Packaged Retail and Insurance-based Investment Products (Regulation (EU) No 1286/2014, Delegated Regulations (EU) 2017/653 and (EU) 2021/2268).
- European Securities and Markets Authority (ESMA): Q&A on MiFID II investor protection (costs and charges disclosures).
- Vanguard and iShares (BlackRock): UCITS ETF prospectuses, Key Information Documents, and investor education resources on replication methodology and tracking difference.
- Stazora calculation engine, verified against standard closed-form compound growth formulas.
Facts checked on 12 October 2026.
Source of the figures: the ETF calculator's own calculation engine, under the assumptions in the text. How the calculator works Source of the fund data: the issuers' factsheets and KIDs. Where the data comes from