How should Belgian residents declare foreign public pensions, accounts and real estate in the 2026 Belgian tax return?
Foreign public pension in Belgium? Treaty relief may apply, but pensions, accounts, dividends and foreign property still need correct Belgian disclosure.
For the 2026 Belgian tax return, relating to income year 2025, a Belgian tax resident must generally declare worldwide income, foreign accounts and foreign real estate, even where a double tax treaty gives another country the right to tax part of the income. Foreign public pensions may be treaty-exempt in Belgium, often with progression, but the correct treatment depends on the exact pension category and the taxpayer’s individual situation.
The figures and deadlines below are illustrative and relate mainly to income year 2025 / assessment year 2026, with a separate note for taxpayers whose Belgian residence status changes during income year 2026 / assessment year 2027.
Belgian tax residence: why the starting point matters
For Belgian income tax purposes, the first question is whether the person is a Belgian tax resident.
Belgium generally looks at the taxpayer’s domicile or centre of economic interests. Registration in Belgium creates an important presumption of Belgian residence, and for married persons the tax domicile is usually linked to where the household is established.
This is especially important where someone moves from a special or diplomatic status into ordinary Belgian tax residence. In that type of transition year, the tax file should not be treated as a simple Belgian-only return. The taxpayer may need to distinguish between:
the period before ordinary Belgian residence begins;
the period after Belgian tax residence begins;
the spouse’s own residence position;
the impact of any diplomatic or special status documents.
Once a person is treated as a Belgian resident, Belgium generally requires disclosure of worldwide income and foreign assets, even if a tax treaty later reduces or removes Belgian taxation on some of that income.
Foreign public pensions: taxable abroad, but still declared in Belgium?
Foreign public pensions are often misunderstood. The fact that a pension is taxed abroad does not automatically mean it can be ignored in Belgium.
For a Belgian resident receiving a foreign public pension, the Belgian treatment depends on the applicable double tax treaty and on the legal nature of the pension.
For example, under the Belgium–Iceland double tax treaty, a government-service pension paid by Iceland, one of its political subdivisions or a local authority for services rendered to Iceland may, depending on the details, be taxable only in Iceland. The treaty also contains a rule for pensions and allowances paid under social legislation or a general social welfare scheme, which can also allocate taxation to the paying State.
In Belgian tax terms, this often leads to exemption with progression. This means Belgium should not tax the pension itself as ordinary Belgian pension income, but Belgium may still take it into account to determine the tax rate applicable to other income taxable in Belgium.
The same logic can arise for certain German public pensions. Under the Belgium–Germany double tax treaty, some public pensions or social-security-type pensions may remain taxable in Germany, while Belgium grants treaty relief. Depending on the type of pension, Belgium may still take the exempt income into account for progression and, in some cases, for municipal or additional tax purposes.
The key practical point is this: the pension certificate matters. A “foreign pension” can be:
a civil-service pension;
a statutory social security pension;
a public-law pension;
a private occupational pension;
a pension from a former employer;
or another type of retirement benefit.
Each category can lead to a different Belgian tax treatment.
Belgian occupational pensions remain a separate issue
A Belgian occupational pension is not treated in the same way as a foreign public pension.
Where a Belgian resident receives a Belgian occupational pension from a former employer or pension institution, that pension is normally taxable in Belgium. It may be pre-filled in the Belgian tax return if paid by a Belgian pension institution, but it should still be checked, especially where earlier Belgian returns were not filed.
This distinction is important in cross-border pension files. A taxpayer may have:
a foreign public pension that is treaty-exempt in Belgium;
a Belgian occupational pension taxable in Belgium;
foreign investment income taxable under separate movable-income rules;
and foreign assets that must be reported even if they do not create Belgian taxable income.
Treating all pensions as one category is a common source of mistakes.
Late Belgian tax returns: why regularisation should be handled year by year
If a Belgian resident has not filed Belgian tax returns for several years, the file should generally be regularised year by year.
For the 2026 Belgian tax return, relating to income year 2025, the ordinary online filing deadline mentioned in the source analysis is 15 July 2026, unless a specific extended deadline applies.
Late filing or non-filing can lead to:
administrative fines;
tax increases;
assessment based on information available to the tax administration;
and, in some cases, a heavier burden on the taxpayer to prove the correct income.
Where illness or another serious personal circumstance explains the delay, it may be useful to document it. This does not automatically remove penalties, but it can be relevant when communicating with the Belgian tax authorities.
A practical regularisation file should normally include, for each missing year:
Belgian pension statements;
foreign pension certificates;
foreign tax documents;
annual bank and investment statements;
dividend and interest summaries;
foreign withholding tax details;
information about foreign accounts;
information about foreign real estate;
and any Belgian tax notices or correspondence already received.
Dividends, savings and foreign investment accounts
Foreign dividends and investment income raise a different issue from foreign pensions.
Belgian withholding tax on dividends and interest is generally 30%, unless a reduced rate or exemption applies. If a Belgian bank has withheld Belgian withholding tax, the withholding tax is often final and the income does not always have to be declared.
By contrast, dividends or interest received through a foreign bank without Belgian withholding tax generally need to be declared in Belgium, unless a specific exemption applies.
For income year 2025 and income year 2026, the analysis refers to the Belgian dividend exemption for the first EUR 833 of qualifying ordinary dividends per taxpayer. If Belgian withholding tax was withheld on those exempt dividends, a refund can be claimed through the tax return, with a maximum refund of EUR 249.90 per taxpayer at the 30% rate.
However, not all distributions qualify. Certain fund distributions, for example, may be excluded. The annual bank statements should therefore be reviewed carefully.
For foreign investment accounts, the taxpayer should collect documents showing:
gross dividends;
foreign withholding tax;
any local surcharges;
net amounts received;
account ownership;
and whether the income belongs to one spouse or to both spouses.
Under the Belgian statutory matrimonial regime, interest and dividends may be treated as common income and divided between spouses, even where the account is legally in one spouse’s name. This should be checked carefully, especially for years where one spouse’s Belgian residence status changed.
Foreign bank and securities accounts must be reported
Belgian residents must report foreign bank accounts and foreign securities accounts both:
to the Central Point of Contact of the National Bank of Belgium; and
annually in the Belgian tax return.
This obligation can apply even if the foreign account was open only for a short period during the year.
A Belgian bank account is not a foreign account for this purpose. But accounts held with banks in Germany, Iceland or any other foreign country may need to be reported if the taxpayer is a Belgian resident and is the account holder.
A power of attorney is not always the same as being the account holder. The bank documents should therefore be reviewed to determine whether the taxpayer is:
sole holder;
joint holder;
beneficial owner;
attorney-in-fact only;
or otherwise legally entitled to the account.
Foreign life-insurance contracts, branch 21/23 products or foreign pension-investment products may also have separate Belgian reporting obligations.
Foreign real estate: declaration is required even if it is not rented out
Belgian residents who own foreign real estate must generally mention it in the Belgian tax return, even if the property is not rented out.
If the property is located in a country that has a double tax treaty with Belgium, Belgium may grant exemption with progression, depending on the treaty and the facts. This means the property may not be taxed in Belgium as ordinary rental income, but it can still affect the tax rate applicable to other Belgian-taxable income.
Belgian residents with foreign real estate must also ensure that the Belgian administration has the information needed to allocate a Belgian cadastral income to the foreign property. This cadastral income is then used in the Belgian return.
For a foreign property, the relevant documents usually include:
acquisition deed;
acquisition date;
ownership split;
acquisition price or current value;
foreign property tax documents;
foreign cadastral or valuation documents;
and any evidence showing whether the property is rented or not.
If the spouses own the property under a community property regime, each spouse normally declares their share.
Double taxation: the solution is correct disclosure, not omission
The main risk in cross-border pension and asset files is double taxation. But the solution is not to leave foreign income out of the Belgian return.
The correct approach is usually:
declare the foreign income in the Belgian return;
identify the correct treaty category;
apply treaty exemption or treaty relief where available;
ensure Belgian progression and municipal tax rules are correctly handled;
coordinate the Belgian return with any foreign tax return.
For public pensions from countries such as Germany or Iceland, the decisive question is whether the treaty gives the taxing right to the foreign State. If it does, Belgium should not simply tax the income as an ordinary Belgian pension. But the income may still need to be declared in the correct foreign-income section.
For dividends, the position is different. Foreign withholding tax and Belgian movable-income tax are not always fully neutralised by treaty relief. The taxpayer may need to check whether foreign withholding tax can be credited, limited or reclaimed, and how the Belgian 30% movable-income tax applies.
Practical checklist for a cross-border Belgian tax file
A taxpayer in this type of situation should generally organise the file in this order:
Confirm Belgian tax residence for each spouse and each relevant year.
Identify which Belgian tax returns are missing.
File the current-year return before the deadline where possible.
Prepare voluntary regularisation for previous years.
Obtain pension certificates for every pension and every year.
Classify each pension as public, social security, occupational or private.
Collect Belgian and foreign bank statements.
Report foreign accounts to the Central Point of Contact if required.
Declare foreign accounts annually in the Belgian tax return.
Review dividends, interest and withholding taxes.
Verify the Belgian cadastral income for foreign real estate.
Coordinate the Belgian treatment with foreign tax advisers where another country also files a return.
Frequently asked questions
Do I have to declare a foreign public pension in Belgium if it is taxed abroad?
Yes, in many cases a Belgian resident must still declare the foreign pension in Belgium. If a double tax treaty gives the other country the right to tax it, Belgium may grant exemption, often with progression.
What does exemption with progression mean?
Exemption with progression means Belgium does not tax the exempt foreign income itself, but may use it to determine the tax rate on other income taxable in Belgium.
Are German or Icelandic public pensions always exempt in Belgium?
No. The result depends on the exact pension category, the treaty wording, nationality exceptions, residence status and pension certificate. A civil-service pension, statutory pension and private occupational pension can be treated differently.
Do foreign bank accounts have to be reported even if they produce no income?
Yes. Belgian residents generally have to report foreign bank and securities accounts to the Central Point of Contact and mention them annually in the Belgian tax return, even if the account produces little or no income.
Is foreign real estate declared in Belgium if it is not rented out?
Yes. Belgian residents must generally declare foreign real estate even if it is not rented out. Belgium may grant treaty exemption with progression, but the property still needs correct disclosure and cadastral-income treatment.
Can late Belgian tax returns be fixed voluntarily?
Often yes, but they should be handled carefully and year by year. Voluntary regularisation should be supported by pension certificates, foreign tax documents, bank statements, foreign account details and any relevant explanation for the delay.
Sources
FPS Finance — Coming to Belgium: tax return — https://fin.belgium.be/en/private-individuals/international/coming-to-belgium/tax-return
FPS Finance — Foreign income — https://fin.belgium.be/en/private-individuals/international/foreign-income-accounts/income
FPS Finance — Tax return 2026 — https://fin.belgium.be/en/private-individuals/tax-return/tax-submission/tax-return
FPS Finance — Foreign bank accounts — https://fin.belgium.be/en/private-individuals/international/foreign-income-accounts/accounts
FPS Finance — Foreign real estate income — https://fin.belgium.be/fr/particuliers/habitation/revenus-immobiliers/etranger
FPS Finance — Cadastral income of foreign immovable property — https://fin.belgium.be/en/private-individuals/property/cadastral-income/abroad
Belgium.be — Matrimonial property regimes — https://www.belgium.be/en/family/marriage/matrimonial_property_regimes
FPS Finance — Savings and investments income — https://fin.belgium.be/fr/particuliers/declaration-impot/revenus/epargne-placements
FPS Finance — Dividend exemption — https://fin.belgium.be/fr/particuliers/avantages-fiscaux/exoneration-dividendes
Belgium–Germany double tax treaty — German Bundestag — https://dserver.bundestag.de/btd/05/030/0503006.pdf
FPS Finance — Belgium–Germany municipal tax note — https://finance.belgium.be/sites/default/files/downloads/Grensarbeiders_Duitsland_fr.pdf
Belgium–Iceland double tax treaty — UN Treaty Series — https://treaties.un.org/doc/Publication/UNTS/Volume%202228/v2228.pdf
This article provides a general framework and is not a personalised tax opinion. Tax rules, filing deadlines and treaty interpretation can change from year to year, and the correct treatment depends on the exact pension documents, residence status, asset ownership and personal situation.
Need tax advice tailored to your situation?
Have a similar situation? Befiscal has already handled files like this one. To get a written tax analysis tailored to your own figures and situation, click the “Ask your question” chat button on the right of this page: our assistant takes over, gathers the information needed and guides you through to your personalised written analysis.