Residence decides, not nationality
If you live in Belgium and are registered here, you are in general a Belgian tax resident, and Belgium taxes your worldwide investment income — dividends, interest and, since 2026, realised capital gains. Your passport plays no role in that. The practical consequence cuts both ways: nothing stops an expat from investing exactly like any other Belgian resident, and nothing exempts an expat from the taxes that come with it.
What an expat meets more often than a local is the foreign layer: a broker kept from the home country, an account abroad, dividends arriving from a third country. Each of those adds a declaration step rather than a prohibition.
Buying the ETF itself
Brokers serving Belgian residents sell UCITS ETFs — the European fund format with a key information document. US-domiciled ETFs are generally not available to retail investors in the EU for that reason, whatever your nationality. The mechanics of the purchase are the same for you as for anyone here: the walkthrough how to buy an ETF as a Belgian resident applies unchanged, and choosing a broker starts with the paperwork — for an expat, doubly so, because the paperwork is where residence questions surface.
One nationality does change things: a US person faces FATCA-driven refusals at many European brokers, and UCITS funds can fall under the US PFIC rules with punitive US taxation. That is US law, not Belgian law — it needs a US tax adviser, not this site.
The taxes you will meet
The same four as every Belgian resident, summarised here with where each one lands:
| Tax | When | Who handles it |
|---|---|---|
| Stock-exchange tax (TOB) | every buy and sell | a Belgian broker withholds it; with a foreign broker you declare and pay it yourself |
| Withholding tax on dividends | when a dividend is paid | a Belgian broker withholds 30%; foreign dividends may also be taxed abroad first |
| Capital gains tax | on gains realised from 2026 | withheld by Belgian intermediaries from June 2026; self-declared otherwise |
| Foreign account reporting | once per account, then yearly in the return | always you |
Which broker withholds what is exactly the kind of fact that differs per broker — the maintained answer is the broker comparison, and the calculator computes the figures from your own transaction history.
The foreign-broker workload, spelled out
Keeping your home-country broker is allowed, if that broker accepts Belgian residents — verify this, because some restrict service after a move. The cost is administrative, and it is recurring:
- The account must be reported once to the National Bank of Belgium and ticked every year in your tax return — the mechanism is in declaring a foreign account.
- The TOB is not withheld for you: you file and pay it yourself, on a two-monthly deadline, with late-filing penalties.
- Dividends may be taxed twice — once abroad, once in Belgium. Treaty relief such as the US W-8BEN reduced rate has to be arranged at the broker; the route is described in foreign dividend withholding.
None of this makes a foreign broker wrong. It makes it a workload decision, and an informed one needs the full list above rather than the first item.
If Belgium is a stop, not the destination
Two timing points matter to anyone planning to move on. Belgian taxes apply to what you realise while resident — the 2026 capital gains tax works from the value on 31 December 2025 for older positions, and your residence at the moment of realisation is what counts. And a move changes which country's rules apply next, which is a question for the tax treaty between Belgium and the destination — country-specific, and outside what this site covers. What it does mean practically: keep your purchase records and year-end valuations, whichever direction you move.
Verify your figures
Belfolio describes these rules for information only — several build on points the administration has not yet confirmed in detail, and cross-border situations add treaty questions this site does not cover. This is not tax advice. Check your situation with the FPS Finance or an adviser familiar with both countries before filing.
Published 29 Aug 2026
Frequently asked questions
- Can I invest in ETFs while living in Belgium as a foreigner?
- Yes. Residence, not nationality, is what matters to brokers serving Belgium and to the Belgian tax rules. As a Belgian tax resident you are taxed here on your worldwide investment income, under the same rules as any other resident.
- Can I keep using the broker from my home country?
- Often yes, if the broker accepts customers residing in Belgium — check that first, as some restrict or close accounts after a move. Tax-wise a foreign broker means more work: no Belgian taxes are withheld for you, and the account itself must be declared to the National Bank and in your tax return.
- I am a US citizen. Does anything change?
- Considerably. Many European brokers do not accept US persons, and UCITS funds can be treated punitively under US tax rules (PFIC). The Belgian side works as described here; the US side needs its own check with a US tax adviser before buying anything.