Financial Planning in Belgium: A Guide for Expats and International Investors

Belgium's financial planning environment is characterised by apparent paradox. Until recently there was no general capital gains tax on the disposal of shares held as a private investor; from 1 January 2026 a new 10% tax applies to gains on financial assets (above an annual exemption). There is no wealth tax and no inheritance tax at national level (though regional succession taxes apply). Yet Belgium has one of the highest effective tax burdens in the OECD for employment income, a 30% withholding tax on dividends and interest, and a sophisticated anti-avoidance regime — the Kaaimantaks — specifically designed to neutralise the use of offshore structures by Belgian residents.

For HNW individuals, Belgium demands careful structuring advice before arrival and ongoing vigilance. Its appeal as a European base is real — Brussels is the de facto capital of the EU, Antwerp is a global diamond and logistics hub, and Ghent and Bruges offer exceptional quality of life — but the tax system rewards those who plan well and penalises those who arrive unprepared.

This guide is for general information only. Belgian tax rules are subject to change; individual circumstances vary. Always obtain professional advice from Belgian and UK-qualified advisers before making decisions.

Tax Residency Rules

Belgian tax residence is based on domicile or principal establishment. An individual is presumed to be a Belgian resident if registered in a Belgian municipal register. The presumption is rebuttable, but the bar is high — Belgian tax authorities take a substance-over-form approach and will look at where family life is centred, where minor children live and attend school, and where the individual's economic activities are managed.

Belgian residents are subject to Belgian personal income tax (Personenbelasting / Impôt des personnes physiques) on their worldwide income. Non-residents pay Belgian tax only on Belgian-source income.

Income Tax

Belgian income tax operates on a progressive scale:

• 0–€16,720: 25%
• €16,720–€29,510: 40%
• €29,510–€51,070: 45%
• Above €51,070: 50%

A tax-free allowance (currently around €11,180, increased for dependent children) applies before these bands; the thresholds are indexed annually for inflation.

Municipal surtaxes (opcentiemen / centimes additionnels) are levied by each municipality at rates that vary but typically add a further 6–9% to the federal tax liability. Brussels municipality levies among the higher rates. The effective combined top rate typically reaches 53–54% for high earners.

Social security contributions are levied separately at rates that vary between employed, self-employed, and company director status.

Capital Gains Tax on Shares

Belgium's longstanding general exemption for gains realised within the normal management of private wealth (normaal beheer van privévermogen) was significantly curtailed by a new capital gains tax that took effect from 1 January 2026. Under the new regime, gains on financial assets (including listed and unlisted shares, bonds, and investment funds) realised by private investors are taxed at a flat rate of 10%, with an annual exemption of €10,000 (indexed, with a limited carry-forward of unused allowance). Higher effective rates apply to substantial shareholdings under a separate tiered scale.

Gains that fall outside normal private wealth management — that is, transactions deemed speculative or conducted as a business activity — continue to be taxed as miscellaneous income at 33%, as they were before the 2026 reform. (The earlier standalone "Speculatiebelasting" on listed shares sold within six months, which had been introduced in 2016, was abolished with effect from 1 January 2017 and no longer applies.)

The interaction of the new 10% tax with the speculative-income rules is complex; private investors with material portfolios should obtain Belgian tax advice on the precise treatment of planned disposals.

Dividend and Interest Withholding Tax

Dividends and interest received by Belgian residents are subject to a 30% withholding tax (Roerende Voorheffing / Précompte Mobilier), which is generally final — meaning no additional income tax is due on these amounts. Belgian paying agents withhold automatically; for foreign-source dividends and interest, the taxpayer must self-declare, and credit for foreign withholding tax is available under treaty provisions.

A dividend received deduction (DBI/RDT regime) applies for qualifying corporate investors holding significant stakes, but not for individual private investors.

Kaaimantaks (Look-Through Tax)

The Kaaimantaks — named colloquially after "caiman" (a New World crocodile) in reference to offshore jurisdictions — is Belgium's statutory look-through regime for offshore structures. Introduced in 2015 and significantly expanded subsequently, it treats Belgian residents as if they directly received the income earned inside certain non-Belgian legal structures.

Structures caught include trusts, private foundations, and companies located in jurisdictions with an effective income tax rate below 15% or appearing on Belgian blacklists. The regime is comprehensive: undistributed income inside a caught structure is taxed in the Belgian resident's hands as if distributed, and distributions are taxed as dividends (at 30%).

For HNW individuals who have historically used offshore trusts, foundations, or holding companies as part of their wealth structuring, Kaaimantaks analysis must be performed before Belgian residency is established. Existing structures may need to be restructured or dissolved prior to arrival.

Securities Account Tax

A tax of 0.15% per annum is levied on the value of taxable financial instruments held in securities accounts where the average value exceeds €1 million over the assessment year. The tax applies to Belgian residents' accounts held in Belgium and abroad, and to non-residents' accounts held in Belgium.

Instruments in scope include listed shares, bonds, and investment funds. Certain instruments (notably non-listed shares and cash) are excluded. The tax is calculated and withheld by Belgian financial institutions on Belgian-held accounts; self-reporting is required for foreign accounts.

Inheritance and Succession Tax

Belgium has no federal inheritance tax. Succession taxes are levied at the regional level by the three Belgian regions (Brussels Capital, Flanders, and Wallonia), each with different rate schedules. Rates in Brussels on amounts above €500,000 passing to non-direct heirs can reach 80%; rates between spouses and direct line heirs are more modest.

There is no gift tax at federal level, but regional gift taxes apply to real property. Cash and moveable assets can be donated to children or grandchildren free of gift tax under certain conditions, particularly if donations are structured three or more years before death. Regional rules vary.

Proper succession planning — structuring assets through Belgian law-compliant vehicles before death — is an important element of the financial planning picture for Belgian residents.

Key Visa and Residency Route for HNW Individuals

Belgium does not operate a formal investment or wealth-based visa programme. EU and EEA nationals have freedom of movement; third-country nationals must apply for a long-stay visa under a category appropriate to their circumstances (employment, self-employment, family reunification, or retirement/independent means).

For non-EU HNW individuals without an employment nexus to Belgium, the pathway is typically through a self-employment or entrepreneur visa, or through a multinational intra-company transfer. The process involves engagement with the relevant regional authorities (RVoA in Flanders, ACTIRIS in Brussels, FOREM in Wallonia).

After five years of legal residence, a long-term EU residence permit can be obtained; citizenship after a further period is possible.

Banking

Belgium's major banks include BNP Paribas Fortis (former Fortis), KBC, Belfius, and ING Belgium. The private banking sector is active — BNP Paribas Wealth Management, Degroof Petercam, and Delen Private Bank are the principal institutions, with international players also well represented.

Belgium participates in the EU deposit guarantee scheme (€100,000 per institution). Belgian banks must comply with CRS and FATCA and report foreign account information to the relevant authorities.

Pension Considerations for UK Expats

UK state pension entitlements continue to accrue on the basis of National Insurance records; voluntary contributions (Class 2 or 3) should be maintained. The UK–Belgium DTA allocates taxing rights on private pensions to the state of residence (Belgium) once pension income is drawn, with UK government pensions retaining UK primary taxing rights.

Belgian residents are also covered by the Belgian social security system, which includes a statutory pension entitlement (the rustpensioen / pension de retraite) based on contribution years. Self-employed individuals and company directors make contributions through a separate scheme.

UK–Belgium Double Taxation Agreement

The UK–Belgium DTA (1987, as amended) covers income taxes and provides:

• Dividends: 10% withholding (5% for corporate beneficial owners holding 10%+ of capital)
• Interest: 15% withholding (reduced to 10% in certain cases)
• Royalties: 0% withholding
• Capital gains: generally residence-based, with immovable property exception

Practical Expat Community Observations

Brussels hosts the largest concentration of EU civil servants, international diplomats, and NGO workers in Europe, creating a large, cosmopolitan English-speaking community. NATO's headquarters adds a further multinational dimension.

The Belgian school system is high quality; the European School network in Brussels is available to children of EU institution employees. International private schools serve the broader expat community. Property in the Ixelles and Uccle districts of Brussels is popular with senior expatriates; Woluwe-Saint-Pierre offers a quieter suburban alternative with good school proximity.

Belgium's healthcare system (social security funded) is consistently rated among Europe's best; access is good for residents who register with a mutualist fund. Cost of living is moderate by Western European capital standards.

How Global Investments Can Help

We advise internationally mobile individuals and families establishing Belgian residency or managing Belgian assets. We can help you assess the Kaaimantaks implications of existing offshore structures, review your UK pension and investment arrangements for Belgian tax efficiency, and coordinate with Belgian legal and tax counsel on succession planning. Contact us to discuss your situation.