Financial Planning Guide: Belgium for British Expats and International Investors

Belgium sits at the heart of Europe — geographically, economically, and politically. As the home of the EU institutions, NATO headquarters, and a significant multinational corporate base, Brussels draws a large population of internationally mobile professionals and executives. Belgium has three official languages (French, Dutch, and German), excellent transport links, and a well-developed private school network. Financially, it presents one of Europe's most interesting — and sometimes underestimated — planning landscapes: very high income tax rates have long coexisted with the absence of capital gains tax for private investors (though a new 10% solidarity contribution on financial-asset gains applies from 1 January 2026), and a specific expat regime provides a meaningful benefit for qualifying employees.

Belgian Tax Residency

Belgian tax residency is established when you register with the local commune (gemeentehuis or maison communale), which triggers automatic registration with the Belgian Federal Public Service Finance. Residency is also imputed on a facts-and-circumstances basis if Belgium is the centre of your personal and financial interests, even without formal registration.

Belgian tax residents are taxed on worldwide income. Belgium has an extensive network of double tax treaties (over 100 in force) that governs how foreign income is taxed and prevents double taxation in most cases.

Belgian Income Tax: IRPP/IPP

Belgian income tax on individuals (impôt des personnes physiques / personenbelasting) is progressive:

• 25% on the first band (income up to approximately €15,200)
• 40% on the second band (approximately €15,200–€26,830)
• 45% on the third band (approximately €26,830–€46,440)
• 50% on income above approximately €46,440

These are among the highest marginal income tax rates in Europe. Municipal surcharges add a further 6–9% on top of the federal rate depending on the commune — so in practice, the effective top marginal rate can reach approximately 53–55% for employment income in cities such as Brussels or Ghent.

Social security contributions (both employee and employer share) are also substantial. The total tax-on-labour burden in Belgium is consistently ranked among the highest in the OECD.

The New Expat Regime (2022 Onwards)

Belgium's expat tax regime was substantially reformed in 2022, replacing the former system that had been in operation for several decades with stricter qualification criteria but a cleaner, more transparent framework.

The new regime in outline: qualifying internationally mobile employees can receive a tax-free lump sum equal to the lower of:

• €90,000 per year, or
• 30% of gross remuneration

This amount is treated as a non-taxable reimbursement of recurring extraterritorial costs (housing abroad, cost-of-living differential, travel to and from the home country). For a highly paid executive earning €250,000 gross, the tax-free allowance is capped at €90,000 — saving approximately €45,000–€50,000 in income tax and social charges compared with full Belgian taxation.

Qualification requirements:

• Recruited directly from abroad, or transferred by an international group to a Belgian entity
• Not Belgian tax resident in the five years immediately preceding employment in Belgium
• Not Belgian social security-insured in the ten years preceding employment
• Gross annual remuneration of at least €75,000 (excluding the expat allowance itself)

Duration: five years initially; extendable to a maximum of eight years on application.

Administration: the regime is employer-administered. The employer must file a request within three months of the employee's start date. Self-employed individuals and company directors are not eligible — the regime applies only to employees in a traditional employment relationship.

Unlike the Netherlands' 30% ruling, the Belgian new expat regime does not provide for partial non-resident taxpayer status on investment income. Belgian tax residents under the expat regime are taxed on worldwide investment income in the same way as other Belgian residents, subject to double tax treaty protections.

Capital Gains Tax in Belgium: A Long-Standing Advantage, Now Narrowed

For decades, Belgium's most distinctive tax feature for investors was the absence of any capital gains tax on private investment portfolios. A Belgian resident who held shares, bonds, investment funds, or other securities as part of their personal wealth — and who was not operating as a professional trader — paid no Belgian tax when selling those assets at a profit, regardless of the size of the gain.

That position has changed. From 1 January 2026, Belgium introduced a new 10% "solidarity contribution" on capital gains realised by private individuals on financial assets. Crucially, the charge applies only to gains that accrue from 1 January 2026 onwards (there is no retroactive taxation of earlier growth; for assets held before that date a 31 December 2025 reference value can generally be used), and an annual exemption of around €10,000 (indexed) is available, with unused allowance partly carried forward. Even so, the headline "no CGT" advantage no longer holds in full, and the impact on a planned large disposal should be modelled carefully.

The 10% rate still compares favourably with the UK (CGT of 18–24% on investment gains), France (flat tax of 30%), and Germany (Abgeltungsteuer of approximately 26.4%).

Important caveats:

• Professional investor risk: the Belgian tax authorities can reclassify an investor as a professional if their investment activity resembles a business — through high frequency, leverage, use of credit, or scale that implies professional intent. Gains from professional activity are taxed as professional income at up to ~55%. This is a genuine risk for highly active traders and should be managed carefully through appropriate documentation of investment rationale and strategy.
• Belgian real estate: gains on the disposal of Belgian property held for less than five years are subject to tax (12.5% for property held under 5 years). Property held for longer is generally exempt for private individuals.
• Dividends and interest: Belgian-source dividends and interest are subject to a 30% withholding tax (précompte mobilier / roerende voorheffing), which is generally a final tax for Belgian resident individuals (no top-up required).

UK Pensions in Belgium

Under the UK-Belgium Double Tax Treaty, private and occupational UK pension income is taxed in Belgium (the state of residence). The treaty does not provide for the lump sum exemptions available in some other countries. Key practical steps:

• Apply for an HMRC NT code to prevent UK withholding at source.
• Belgian income tax applies at IRPP rates on the full pension income received.
• The rente (pension) income deduction reduces the effective rate for many pensioners.
• UK government and civil service pensions remain UK-taxable under the treaty's government service article.

The Belgian state pension (pensioen / pension) accrues through social security contributions during Belgian employment. Expats on shorter assignments may not accumulate meaningful Belgian state pension entitlement.

Belgian Property

Belgium has a stable residential property market with strong owner-occupancy rates, particularly in Flanders. For internationally mobile clients, Brussels offers a deep rental market and high-quality housing stock.

Purchase costs for residential property vary by region:

• Flanders: registration duty of 3% for a primary residence meeting certain conditions; 12% for second homes and investment property
• Wallonia and Brussels: 12.5% for most residential purchases (reductions available for primary residence meeting conditions)

Notary fees add approximately 1–1.5% of the purchase price. Total acquisition costs are significant and should be factored into investment return calculations.

Property taxation: ongoing Belgian property is subject to the précompte immobilier (property tax), assessed on a notional cadastral income. There is no annual wealth tax on property.

Belgian Inheritance Tax: A Serious Planning Consideration

Belgian inheritance tax is administered at the regional level — and the rates differ meaningfully between Flanders, Wallonia, and Brussels. For clients resident in Brussels or Wallonia:

Between spouses / direct descendants in Brussels (indicative):

• 3% on the first tranche; rising to 30% on amounts above €500,000

Between unrelated individuals in Brussels:

• Rates rise to 80% for amounts above €75,000

Flemish rates are broadly similar for direct-line transfers but have been subject to progressive reform; the Flemish government has made reducing inheritance tax a policy priority.

Belgian inheritance tax applies to the worldwide assets of Belgian-resident deceased persons, and also to Belgian immoveable property for non-residents. This is a significant planning consideration for clients with Belgian real estate or who establish long-term Belgian residency. Trusts are not recognised under Belgian law and may be subject to adverse tax treatment — specialist advice on estate structuring is essential.

Practical Steps for Belgium-Bound Clients

• Document investment strategy and holding rationale to support private investor status and mitigate professional investor reclassification risk.
• Engage employers to apply for the new expat regime within three months of the start date.
• Apply for an HMRC NT code for UK pension income.
• Commission Belgian estate planning advice before establishing long-term residency — the inheritance tax rates and absence of trust recognition make early planning critical.
• Model property acquisition costs carefully — the 12.5% registration duty in Brussels and Wallonia substantially affects investment returns.
• Maintain offshore banking and investment relationships alongside Belgian day-to-day banking.

This guide reflects the position as of mid-2026 and should not be treated as tax advice. Belgian tax law is complex and subject to regional variation. The value of investments can fall as well as rise. Seek qualified professional advice before making decisions.

How Global Investments can help

Global Investments supports internationally mobile clients considering Belgium with pre-arrival financial structuring, pension planning, and cross-border estate strategy. We work alongside Belgian tax specialists to ensure that the capital gains position (including the new 2026 solidarity contribution) is managed correctly, the new expat regime is claimed efficiently, and inheritance planning structures are in place before long-term residency is established. Contact us to arrange an initial consultation.