In short: Dividend leakage (our term, not an official one) is foreign withholding tax that a fund bears on the dividends it receives and does not get back. Vanguard’s prospectus lists this under “Foreign Taxes Risk”. The tax applies to income the fund receives, so it does not depend on whether you hold the accumulating or the distributing share class. It is not part of the TER.
What is dividend leakage and where does it occur?
When you invest in an exchange-traded fund (ETF) that holds international equities, the companies in the fund’s portfolio pay dividends. Foreign countries may withhold tax on those dividends before the fund receives them. Two separate levels of tax are involved:
- Level 1 (fund level): Dividends, interest and capital gains a fund receives may be subject to taxes, including withholding taxes, in the countries where the issuers are located (Vanguard Funds plc prospectus, 15 October 2026). Some funds can get a reduced rate under double taxation agreements; the Vanguard prospectus says its Irish funds may not be able to. We call the withholding tax a fund bears and does not recover dividend leakage.
- Level 2 (your own tax): In the Netherlands, Dutch dividend tax withheld on dividends can generally be credited against income tax, with exceptions. The Belastingdienst allows crediting of Dutch dividend tax only. For foreign tax paid inside a fund we found no official source describing a way for a holder to credit it.
Level 1 tax is not charged to you separately; it reduces the income the fund receives. Over time that can lower the growth of the fund.
Why fund domicile and tax treaties matter
The effect of withholding tax depends on the countries where the portfolio companies are located and on how the fund’s domicile and tax treaties apply. Ireland and Luxembourg are the two largest domiciles for UCITS funds by assets, according to the EFAMA Fact Book 2025 (about 31% and 27% of UCITS net assets at the end of 2024; the figure covers all UCITS, not only ETFs). You can see a fund’s domicile in the first two letters of its ISIN code, such as IE for Ireland or LU for Luxembourg.
The Vanguard Funds plc prospectus says it is anticipated that the company may not be able to benefit from reduced rates of withholding tax in double taxation agreements between Ireland and the countries concerned. Whether another fund can do so is a question for its own prospectus.
A Dutch fiscal investment institution (FBI) can qualify for a special corporate tax regime if it meets conditions, among them distributing its profit to shareholders within eight months of the end of the financial year (Belastingdienst). We do not cover how FBI funds treat foreign withholding tax.
Why accumulating ETFs suffer from dividend leakage too
Withholding tax on dividends is borne by the fund, whichever share class you hold.
Both share classes of the Vanguard FTSE All-World UCITS ETF seek to track the same index. The prospectus describes the tax as applying to income the fund receives, not to a share class:
- In a distributing share class, income is paid out after the tax has been withheld.
- In an accumulating share class, the income stays in the fund, also after the tax has been withheld.
Because the tax is borne at fund level, accumulating and distributing share classes are both affected.
Why dividend leakage is not in the TER
The Total Expense Ratio (TER), shown by Vanguard as the Ongoing Charges Figure, covers the management charge plus running costs such as administration, audit, depositary, legal, registration and regulatory expenses (Vanguard factsheet, 30 September 2026). It is shown in the factsheet and in the fund’s key information document (KID).
Dividend leakage is not included in the TER. Vanguard’s prospectus lists withholding taxes deducted from dividend payments to the fund among the items the ongoing charges do not cover.
Withholding tax is one reason a fund’s return can differ from its index. Vanguard’s prospectus says the effect can be positive or negative for an index-tracking fund compared with the index. The tracking difference can therefore be larger or smaller than the ongoing charges.
What fund issuers say in their official documents
Vanguard’s Funds plc prospectus (15 October 2026, “Foreign Taxes Risk”) says: “Dividends, interest and capital gains … which the Company receives … may be subject to taxes, including withholding taxes, in the countries in which the issuers … are located.” The prospectus also states the fund may not be able to benefit from reduced treaty rates.
An illustrative calculation: the compound impact of cost drag
As an illustrative assumption, not an estimate for any fund, we add 0.20% a year for an unrecovered tax. To see how such an extra cost behaves over long horizons, we can simulate its compounding effect with the site’s math engine.
In the simulation below, we compare an initial investment of €10,000 with zero monthly contributions over 10-year and 20-year horizons, assuming a constant gross annual return of 6% before costs (an illustrative assumption, not a forecast). We contrast a baseline fund charging a standard 0.14% TER against a scenario bearing an illustrative additional cost drag of 0.20% per year (an assumed extra cost), bringing the total drag to 0.34% per year:
| Horizon | Gross (0% costs) | Base TER (0.14%) | With illustrative leakage (0.34%) | Illustrative drag difference |
|---|---|---|---|---|
| 10 years | €18,194 | €17,942 | €17,589 | €353 |
| 20 years | €33,102 | €32,192 | €30,936 | €1,256 |
As the table demonstrates, an illustrative annual drag of 0.20% reduces the 10-year net outcome by €353 (from €17,942 down to €17,589). Over 20 years, compound growth magnifies this gap, widening the lost return to €1,256 (from €32,192 down to €30,936). An extra 0.20% a year has the same arithmetic effect as 0.20% more in costs.
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 test different holding periods and cost levels in our ETF calculator:
Questions to ask an independent financial or tax adviser
Because individual tax circumstances depend heavily on residency, asset allocation, and national tax legislation, retail investors evaluating fund structures may benefit from professional guidance. When consulting a licensed financial or tax adviser, consider asking the following questions:
- Cross-border fund treatment: How does our domestic tax authority treat income and capital growth from foreign-domiciled funds (such as Ireland or Luxembourg) compared to domestic investment vehicles?
- Withholding tax offset eligibility: Can foreign dividend withholding tax deducted at source be credited against my personal domestic income or wealth tax liabilities, or does it stay inside the fund?
- Domestic fund regimes: For Dutch residents, how are fiscal investment institutions (FBI) treated for withholding tax compared with foreign funds?
- Legislative and treaty developments: How might planned or proposed revisions to international tax treaties or national wealth tax laws impact the net holding cost of my international ETFs over my planned time horizon?
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.
Frequently asked questions
Can retail investors reclaim dividend leakage on Irish ETFs?
No. The Belastingdienst allows crediting of Dutch dividend tax only. Foreign tax paid inside a fund reduces the income the fund receives; we found no official source describing a way for a holder to credit it.
Is dividend leakage included in the ETF calculator?
No. The calculator uses the cost rate you enter and does not model withholding tax separately. Withholding tax can contribute to the gap between a fund and its index (tracking difference).
Related pages and terms
- What does an ETF really cost?: comprehensive guide to ongoing charges, trading costs, and tax drag
- How to read a factsheet: understand costs, benchmark tracking, and fund structure
- Glossary: Dividend leakage: definition and fundamental mechanics
- Glossary: Dividend tax: domestic withholding tax and offset rules
- Glossary: Tracking difference: how fees, friction, and taxes affect benchmark tracking
- Glossary: Domicile: why fund registration jurisdiction influences net returns
- Glossary: Accumulating: share class mechanics for dividend reinvestment
- Glossary: Fiscal investment institution (FBI): Dutch investment fund tax regime
- ETF Calculator: simulate the compounding impact of ongoing fund expenses
Open this calculation directly in the calculator and adjust the horizon, deposits, or return to model your own situation.
Sources
- Vanguard Funds plc Prospectus, 15 October 2026, “Foreign Taxes Risk” and “Index tracking” (Vanguard’s website, opened 20 October 2026).
- Vanguard FTSE All-World UCITS ETF (USD) Accumulating factsheet, data as at 30 September 2026 (Vanguard’s website).
- Belastingdienst: pages on crediting dividend tax and on the fiscale beleggingsinstelling (opened 20 October 2026).
- EFAMA, Fact Book 2025: UCITS net assets by domicile (efama.org).