Belgium has a well-established, relatively complex tax system in which employers are responsible for withholding income tax and social security contributions directly from employees' salaries. The system operates across federal, regional, and local levels, with progressive taxation and extensive social security coverage.
An individual is considered a tax resident in Belgium if their main home or centre of personal and economic interests is located in the country. Tax residents are taxed on their worldwide income, while non-residents are taxed only on Belgian-sourced income.
Personal income taxes: Belgium applies a progressive income tax system based on income levels:
- 25% on income up to €16,320.
- 40% on income from €16,320 to €28,800.
- 45% on income from €28,800 to €49,840.
- 50% on income above €49,840.
A personal tax allowance applies to the first portion of income (€10,910 for 2025), reducing the overall taxable base.
Withholding and contributions:
- Dividends: Generally taxed at a flat 30%, with a tax-free allowance of €859 per year.
- Interest income: 30% flat tax, with exemption on savings accounts up to €1,050 (2025).
- Capital gains: Typically not taxed for private individuals under normal asset management. Exceptions apply in some cases.
Tax allowances and non-taxable benefits: Belgium provides a personal tax allowance that reduces the portion of income subject to personal income tax. For the 2025 income year, the basic tax-free allowance is €10,910, and it can increase depending on the taxpayer’s personal and family situation. Additional exemptions apply for dependants:
- 1 child: + €1,980
- 2 children: + €5,110
- 3 children: + €11,440
- 4 children: + €18,510
- Other dependants: + €1,980
Disabled dependants count as two dependants. For each child under 3 years old, the exemption increases by €740 if childcare expenses are not claimed. These exemptions are applied to the lowest taxed portion of income.
Belgium also allows income splitting between spouses (marital quotient):
- Up to 30% of income can be allocated to the lower-earning or non-working spouse.
- Capped at €13,460, with higher limits in specific self-employment cases.
- Applies when one partner earns significantly more than the other.
Employment-related deductions further reduce the taxable base:
- Social security contributions are fully deductible.
- Work-related expenses can be deducted if justified.
- If not, a standard deduction applies:
Employees: 30% of gross income, capped at €5,930
Directors: 3% of income, capped at €3,130.
In addition to social security contributions and work expenses, some personal expenses can also be deducted.
Deductions and tax reliefs: Belgian tax residents can benefit from a range of deductions and tax reductions that lower their overall tax liability.
Maintenance payments (alimony):
- 80% of qualifying payments to a former spouse or close relatives are deductible.
- Non-residents can claim this only if the recipient is a Belgian resident (unless a tax treaty states otherwise).
Federal tax reductions include:
- Pension savings contributions,
- Employee contributions to group insurance,
- Recognised charitable donations,
- Life insurance premiums,
- Childcare expenses.
Regional tax reductions (vary by region) may apply to:
- Mortgage repayments,
- Service vouchers,
- Renovation or security investments.
The exact thresholds, percentages, and eligible expenses are defined by federal and regional tax laws and are updated regularly.
