Belgium taxes residents on worldwide income and non-residents on Belgium-source income only. Belgium operates an administrative assessment system: taxpayers file a return, but the tax administration calculates the final liability and issues a formal assessment notice (avertissement-extrait de role / aanslagbiljet) rather than the taxpayer's own self-calculated figure being final.
The Belgian tax year is the calendar year. The standard individual filing deadline is around 30 June for paper returns and somewhat later (varies annually, historically into July) for online filing via Tax-on-Web/MyMinfin, confirmed each year by the FPS Finance; a separate, later deadline applies to specific 'complex' income categories (self-employment profits, director's fees, foreign professional income).
The standard corporate tax rate is 25%. A reduced 20% rate applies to the first EUR 100,000 of profit for qualifying small and medium-sized companies meeting specific ownership and activity conditions.
Belgium imposes a progressive personal income tax with a top marginal rate of 50%, applying above approximately EUR 46,440 of taxable income (bracket adjusted annually for inflation). A municipal surcharge (typically 0-9%, averaging around 7%) applies on top of the federal tax.
The standard VAT rate is 21%, with reduced rates of 12% and 6% applying to specified goods and services (certain foodstuffs, pharmaceuticals, books, and social housing, among others).
An individual is a Belgian tax resident if their domicile (actual dwelling) or "seat of wealth" (center of economic interests) is in Belgium - a factual determination, not a formal declaration. Two legal presumptions apply: anyone entered in Belgium's National Register is presumed resident unless they prove otherwise, and married individuals are irrebuttably presumed resident where their family actually lives. Spending more than 183 days in Belgium in a calendar year is a strong practical indicator, though not itself the formal legal test. Residents are taxed on worldwide income (foreign-source income taxed abroad under an applicable treaty is exempt with progression - it still affects the marginal rate on Belgian income); non-residents are taxed only on Belgian-source income.
A non-Belgian entity has a Belgian permanent establishment through a fixed place of business or a dependent agent habitually concluding contracts in Belgium on the entity's behalf, following the OECD Model Treaty definition as applied under Belgian domestic law and any applicable tax treaty.
Belgium's CFC regime (in force since January 1, 2019, implementing EU ATAD) applies where a Belgian company holds, directly or indirectly, at least 50% of the voting rights, capital, or profit entitlement of a foreign entity, and that entity is untaxed or taxed at less than half of what Belgian corporate tax would be on the same profit (this catches not just traditional havens but also certain regimes in jurisdictions like Luxembourg, Malta, or specific Swiss cantons). Since a 2023/2024 reform, Belgium applies an entity-approach ("Model A") test: undistributed passive income is included in the Belgian parent's tax base unless a safe harbor applies - either the CFC has less than one-third of its income from passive sources, or it is a regulated financial institution deriving one-third or less of its income from transactions with the Belgian controlling company. A non-refundable foreign tax credit is available for foreign tax the CFC has already paid on the attributed profits.
Belgium layers three separate interest restrictions. A strict 1:1 debt-to-equity ratio applies to loans from individual directors and shareholders. A 5:1 ratio applies to older (pre-June 17, 2016) related-party loans and to any loan from a lender based in a tax haven - interest on debt exceeding these ratios is non-deductible and reclassified as a dividend, triggering dividend withholding tax. Since tax year 2020, a general ATAD-based rule additionally caps net interest expense at the higher of 30% of fiscal EBITDA or EUR 3 million (assessed on a Belgian group-consolidated basis where applicable); disallowed interest carries forward indefinitely, and unused EBITDA capacity can be transferred among group companies.
Belgium does not use an elective check-the-box classification system; entity classification generally follows the entity's actual legal characteristics. Belgium has implemented ATAD2-aligned anti-hybrid rules denying deductions for payments producing a hybrid mismatch outcome involving a related party or structured arrangement.
A Belgian resident must disclose the existence (account number, country, and financial institution) of any foreign bank account on their annual personal income tax return, and separately register that account with the Central Point of Contact (Point de Contact Central) maintained by the National Bank of Belgium - a distinct notification requirement on top of the tax-return disclosure. This is an account-existence disclosure requirement rather than a full balance/transaction reporting regime, but it is Belgium's own genuine domestic foreign-account reporting mechanism, distinct from Belgium's separate participation in CRS automatic exchange described under Treaty Network below.
Belgium provides a participation exemption (DBI/RDT regime, Definitief Belaste Inkomsten / Revenus Definitivement Taxes) for qualifying dividends: a Belgian company holding at least 10% of a subsidiary's capital (or an acquisition value of at least EUR 2.5 million) for a continuous minimum one-year period can deduct 100% of qualifying dividends received from taxable income, subject to the subsidiary meeting a subject-to-tax condition.
Belgium's relief from double taxation is more commonly an EXEMPTION rather than a conventional foreign tax credit - under most of its tax treaties, Belgium applies an exemption-with-progression method for foreign-source income already taxed abroad, removing it from the Belgian tax base (while still counting it for rate-progression purposes) rather than granting a credit against Belgian tax. A narrower foreign tax credit mechanism (Quotite Forfaitaire d'Impot Etranger, QFIE/FBB) applies in specific, limited circumstances, mainly for certain foreign-source interest and royalty income. This is a materially different mechanism from a straightforward ordinary credit and should not be assumed equivalent to the US/Canada/UK-style FTC model.
Belgium has concluded double tax treaties with more than 150 countries though the number actually modified by the MLI is lower since both treaty partners must have ratified and matched their positions.