Belgium Corporate Tax Guide

Standard Corporate Tax Rate — 25%

• Headline rate: Belgian corporate income tax (vennootschapsbelasting/VennSt/BWC) is levied at a flat rate of 25% on worldwide taxable profits for resident companies. Non-resident companies are taxed on Belgian-source income only.
• Crisis surcharge (crisisbelasting/crise): An additional 2% surcharge (the "crisisbijdrage") applies to companies with taxable profit exceeding €1,000,000, bringing the combined marginal rate to approximately 25.5% (25% × 1.02). This surcharge was introduced as a temporary measure but has been repeatedly renewed.
• Effective rate comparison: The headline 25% rate is among the higher corporate rates in the EU, but the availability of the notional interest deduction (NID), VVPR-bis regime, investment deduction, and patent income deduction can reduce the effective rate to as low as 5–12% for well-structured SMEs and IP-holding companies.

SME Reduced Rate — 20% on First €100,000

• Qualification — KMO criteria: A company qualifies as an SME (KMO/PME) for the reduced rate if it meets all of the following: (a) annualised taxable profit before deductions ≤ €322,000 in the prior tax year, (b) total assets ≤ €4,500,000 or annual turnover ≤ €9,000,000, (c) average annual FTE headcount ≤ 50, (d) no more than 20% of shares held by one or more companies (with exceptions for certain holdings), and (e) the company is not a financial institution, insurance company, or investment company.
• Mechanics: The first €100,000 of taxable profit is taxed at 20% (reduced from 20.4% in 2024 — the rate has been gradually decreasing). The excess above €100,000 is taxed at the standard 25% rate. The reduced rate is effectively a targeted relief for genuinely small businesses.
• Director salary requirement: For the reduced rate to apply, at least one director must receive a minimum annual salary of €45,000 (2026 figure, indexed). If the company has no or insufficient director salary, the reduced rate is denied. This rule exists to prevent conversions of salary income into lower-taxed corporate profits.
• Gradual phase-out: The €100,000 base is reduced proportionally if the tax year is shorter than 12 months. The reduced rate is also pro-rated if the company's taxable period exceeds 12 months.

Notional Interest Deduction (NID) — Notionele Interestaftrek

• The NID (Déduction pour Intérêt Notionnel / Notionele Interestaftrek): The NID provides a deemed interest deduction on a company's adjusted equity (risk capital). The deduction is calculated as the average equity (adjusted for certain items) multiplied by the 10-year Belgian government bond rate (rolling average). For 2026, the NID rate is estimated at approximately 1.2–1.8% (the rate has declined significantly from the 3–4% range available before 2018 as bond yields have fallen).
• Adjusted equity calculation: Equity in the balance sheet is adjusted upward by: tax-exempt reserves, capital subsidies, investment deductions carried forward, certain tax-free revaluation surpluses, and prior-year losses (post-2018). Adjusted downward by: the net book value of own shares held, the net book value of permanent establishments whose income is exempt, the net book value of qualifying shareholdings (participation exemption), and the net book value of assets generating exempt patent income.
• NID reduced form (pre-2018 vs post-2018): The NID was significantly restricted in 2018. For new equity capital contributed from tax years starting after 1 January 2018, the NID is calculated at a reduced rate (not the full bond rate). For equity that existed before 2018, the old regime continues to apply (historically higher rate of 3–4%). This grandfathering is gradually phasing out as pre-2018 equity is replaced.
• Carry-forward: Unused NID can be carried forward indefinitely but cannot exceed the higher of €1,000,000 or 70% of taxable profit in any given year (consistent with the interest limitation rule).

VVPR-bis — Liquidation Reserve Regime

• Overview: The VVPR-bis regime (Wet van 30 juli 2013 / VVPR-bis / VVPR-ter) is a uniquely Belgian mechanism that allows SMEs to retain profits in a liquidation reserve (liquidatiereserve) at a favourable tax rate. The retained profit is taxed at 10% at the corporate level (the "afzonderlijke aanslag" — separate assessment) — and when subsequently distributed as a dividend (liquidation bonus), only 5% withholding tax applies. The total combined tax burden is approximately 14.5% (10% + 5% × 90%) versus the normal 30% WHT on dividends.
• Qualification: The regime is available to micro- and small-enterprises (KMO — same criteria as the reduced rate: ≤50 FTE, ≤€9M turnover/€4.5M assets, ≤20% corporate shareholding). The company must also meet the minimum director salary requirement (€45,000).
• Mechanics: Each year, the company can allocate part of its after-tax profit to the liquidation reserve. This allocation is subject to a 10% separate tax (the "taxe VVPR-bis"). The reserve is not available for distribution during a 5-year holding period (the "sperperiode"). After 5 years, the reserve can be distributed as a liquidation dividend subject to 5% WHT (reduced from the standard 30%).
• Sperperiode (lock-up period): The liquidation reserve must be maintained on the balance sheet for at least 5 years from the end of the tax year in which it was created. Early distribution triggers a penalty — the 10% regime is reversed, and the profit is re-taxed at the standard corporate rate (25%) plus interest. The 5-year period can be shortened in certain cases (e.g., company dissolution or restructuring).
• Cap on reserve: The annual allocation to the liquidation reserve cannot exceed the distributable profit after the standard corporate tax. There is no aggregate cap on the total accumulated reserve.

Investment Deduction (Investeringsaftrek)

• General mechanism: The investment deduction (investeringsaftrek/déduction pour investissement) allows companies to deduct a percentage of the acquisition or investment cost of qualifying fixed assets from their taxable profit. The deduction is available in addition to normal depreciation.
• Rates (2026): (a) General rate: 8% for investments in R&D, energy-saving equipment, security equipment, and digital assets; (b) Digital transformation: 13.5% for investments in digital assets (software, data infrastructure, cybersecurity); (c) Security: 20% for investments in security equipment (alarms, surveillance, anti-theft); (d) Energy-saving: 20% for qualifying energy-saving investments (LED lighting, high-efficiency boilers, heat pumps, insulation); (e) Transport: 15% for zero-emission trucks and buses; (f) Patent income: See separate section below.
• One-off or spread: The company can choose between a one-off deduction in the year of acquisition (the "eenmalige aftrek") or a spread over the depreciation period (the "gespreide aftrek"). The one-off deduction is limited to the taxable profit in the given year; excess can be carried forward indefinitely.
• Eligible assets: New and used tangible assets (machinery, equipment, vehicles, buildings — land excluded) and certain intangible assets (patents, know-how, software). The asset must be held for at least 3 years (or 5 years for certain R&D assets).

Patent Income Deduction (Innovatie-aftrek)

• The deduction: Belgium offers an 85% exemption on qualifying patent income (the "innovatie-aftrek" / déduction pour innovation). This means only 15% of the net patent or IP income is included in taxable profit — an effective rate of 3.75% (25% × 15%) for non-SMEs or 3% (20% × 15%) for SMEs on the first €100K.
• Scope (post-BEPS nexus approach): The regime has been reformed to comply with the OECD's modified nexus approach (BEPS Action 5). Qualifying IP includes patents, copyrighted software, supplementary protection certificates, and orphan drug designations. Marketing-related IP (brands, trademarks) does NOT qualify. The deduction is limited to the ratio of qualifying R&D expenditures to total R&D expenditures (the nexus ratio). Outsourced R&D to related parties is subject to the 30% uplift cap (limited to 30% of qualifying R&D expenditures without outsourcing).
• Grandfathering: IP assets acquired or developed before 30 June 2016 are subject to transitional rules. The old regime (80% exemption for all IP) was phased out by 30 June 2021 for most taxpayers.

Participation Exemption (DVV / RDB)

• The exemption: Dividend income from qualifying shareholdings is 95% exempt from corporate tax (the "deelnemingsvrijstelling" / DVV — participation exemption). Only 5% of the dividend is taxable as a "forfaitaire kost" (deemed non-deductible expense). The effective tax rate on qualifying dividends is therefore 5% × 25% = 1.25%.
• Conditions: The shareholding must meet: (a) ≥10% ownership or acquisition cost ≥ €2,500,000, (b) holding period ≥ 12 months (can be satisfied by intent), (c) the subsidiary is subject to a corporate income tax (or similar foreign tax) — not required for EU/EEA subsidiaries, (d) the shares are held as fixed financial assets (not trading book).
• Capital gains exemption: Capital gains on qualifying shareholdings are also exempt (the "meerwaardevrijstelling"), provided the shares meet the DVV conditions. The exemption does not apply if the shares are held as trading stock (stock de négoce/handelsvoorraad).

Loss Carry-Forward and Limitations

• Carry-forward: Tax losses can be carried forward indefinitely. There is no expiry of tax losses in Belgian corporate tax. However, an annual cap applies: losses brought forward can offset a maximum of €1,000,000 plus 70% of the excess above €1,000,000 in any given year (consistent with the ATAD interest limitation rule). This means that for a company with €2,000,000 of profit, the first €1,000,000 is fully offset, and only 70% of the remaining €1,000,000 (€700,000) can be offset — total offset: €1,700,000, leaving €300,000 taxable.
• Carry-back: Belgium does NOT allow loss carry-back. Losses can only be carried forward.
• Change of control (anti- misuse rules): If more than 50% of the shares change hands, the company's tax losses may be restricted if (a) the company's activity changes significantly, or (b) the losses were generated more than 3 years before the change of control. This applies to losses incurred after 1 January 2019. Pre-2019 losses are subject to the old rules (more generous grandfathering).

ATAD Implementation — Interest Limitation, CFC, Hybrid Mismatches

• Earnings-stripping rule (30% EBITDA): Net borrowing costs (interest expense minus interest income) are deductible up to the higher of €3,000,000 or 30% of tax EBITDA (taxable profit before tax, net interest, depreciation, and amortisation). This is Belgium's implementation of the ATAD interest limitation rule (art. 4 ATAD 1). Any excess can be carried forward indefinitely (no carry-back) and used in future years when the limit is not fully used.
• CFC rules (ATAD 2): Controlled foreign company (CFC) rules apply to Belgian companies that control a foreign entity (legal entity or PE) in a low-tax jurisdiction (effective tax rate <50% of the Belgian rate — i.e., <12.5%). If more than 50% of the CFC's income is passive (interest, royalties, dividends, IP income, leasing, insurance, banking), that passive income is attributed to the Belgian parent and taxed in Belgium (with a foreign tax credit for any tax paid abroad). The CFC rules apply to both subsidiaries and permanent establishments.
• Hybrid mismatches (ATAD 2): Belgium has implemented the anti-hybrid rules (ATAD 2) targeting arrangements that exploit differences in the tax treatment of entities, instruments, or permanent establishments between two jurisdictions. Deductions in Belgium for payments that are not included in income in the payee jurisdiction (deduction/no-inclusion) are denied. Similarly, double deduction arrangements are neutralised.
• GAAR (algemene anti-misbruikbepaling): Belgium has a general anti-abuse rule (art. 344 §1 WIB 92 / art. 344 §1 CIR 92) that allows the tax authorities to re-characterise transactions that have no valid economic purpose (the "substance over form" doctrine). The burden of proof shifts to the taxpayer if the authorities demonstrate that the transaction is primarily tax-motivated. A "ruling" (advance tax ruling) from the Service des Décisions Anticipées (SDA/DVB) provides legal certainty.

Tax Compliance and Key Deadlines

• Tax year vs accounting year: Belgian corporate tax is assessed on the income of the accounting year ending in the preceding calendar year. For example, a company with FY ending 31 December 2025 files for tax year 2026 (aanslagjaar 2026).
• Corporate tax return: The annual corporate tax return (Vennootschapsbelastingaangifte/déclaration ISOC) must be filed within 6 months of the balance sheet date (extended to 7 months for electronic filing). Filing is mandatory online via the BizTax/Belcotax portal (or Your Belgium / MyMinfin for smaller companies). The return is in the format of the "Vennootschapsbelasting 2" form (or "275 ISOC" for larger groups).
• Voorafbetalingen (prepayments): Companies must make quarterly prepayments (voorafbetalingen/versements anticipatifs) of estimated corporate tax by 10 April, 10 July, 10 October, and 20 December. Insufficient prepayments attract a penalty of 6.75% (increasing to 9% from 2027) on the shortfall. The penalty is computed as a percentage of the unpaid prepayment versus the final tax liability. The penalty cannot be recovered — it is a genuine increase in the effective tax rate for companies that fail to prepay.
• Payment deadlines: Final tax payment (after filing) is due within 2 months of the assessment notice (aanslagbiljet/avis d'imposition). Interest at 4.5% (2026 rate, reviewed semi-annually) accrues on late payments.
• Transfer pricing documentation: Belgian companies with related-party transactions exceeding €1,000,000 (for goods/services) or €100,000 (for intangible/management fees) must maintain a master file and a local file. The documentation must be filed with the tax return if the company exceeds the thresholds. Belgium applies the OECD TP Guidelines. Penalties for non-compliance: €1,250 per missing document (adjusted annually).

Group Taxation and Restructuring

• No tax consolidation: Belgium does NOT have a group tax consolidation regime (fiscale eenheid/régime de groupe). Each legal entity is taxed separately. However, a limited "groepsbijdrage" (group contribution) regime exists for intra-group profit transfers — only available for companies subject to Belgian corporate tax within a qualifying group (≥90% ownership, all Belgian-resident). The contribution is deductible up to certain limits.
• Reorganisations: Mergers, demergers, and asset contributions can be carried out on a tax-neutral basis under the EU Merger Directive (implemented in Belgian law). Qualifying reorganisations must have valid economic reasons (the "legitimate economic purpose" test). Advance rulings are available and recommended given the strict substance requirements.
• Liquidation: Upon liquidation, the company's remaining reserves (including the VVPR-bis liquidation reserve) are distributed to shareholders. The liquidation dividend is subject to 5% WHT (30% standard rate for non-VVPR-bis reserves). Capital losses on liquidation are generally deductible (subject to anti-abuse rules).

Tax-Free Capital Increases and Reserves

• Capital increases: Contributions of capital (in cash or in kind) are tax-free at the corporate level. The paid-in capital (gestort kapitaal/capital libéré) is recorded on the balance sheet and is not subject to corporate tax upon repatriation (return of capital is tax-free for the shareholder, reducing the tax basis).
• Revaluation reserves (herwaarderingsmeerwaarden/plus-values de réévaluation): Tax-free revaluation of fixed assets (tangible and financial) is permitted under strict conditions (the asset must have a definitive and sustainable increase in value). The revaluation surplus is recorded as a tax-free reserve but becomes taxable upon realisation (sale) of the asset. Depreciation on the revalued amount is not deductible.

For related reading, see our Personal Tax Guide →, VAT/BTW Guide →, Starting a Business Guide →, and Cross-Border Tax Guide →.