Belgium's corporate tax rate is 25% standard, with a reduced 20% rate for SMEs on the first €100,000. This guide covers all rates, deductions, incentives, and tax planning opportunities.
Understanding the Belgian corporate tax rate is essential for any business operating in Belgium. As part of our accounting and tax services, LawSupport helps international companies navigate Belgium's corporate tax system — from the standard 25% rate and SME relief to powerful deductions like the innovation income deduction and notional interest deduction.
Standard Rate
25%
On all taxable corporate income
SME Reduced Rate
20%
On first €100,000 (qualifying SMEs only)
Belgian Corporate Tax Rates (2026)
Taxable Income
Standard Rate
SME Rate
First €100,000
25%
20%
Above €100,000
25%
25%
The SME reduced rate saves €5,000 on the first €100,000 of taxable income (€100,000 × 5% difference). This applies automatically if the company meets all qualifying criteria.
SME Reduced Rate — Qualifying Criteria
To qualify for the 20% rate on the first €100,000, a company must meet ALL of the following:
"Small company" under the CSA — does not exceed 2 of 3 thresholds:
Annual turnover ≤ €9,000,000 (excl. VAT)
Balance sheet total ≤ €4,500,000
Annual average employees ≤ 50
Minimum director's remuneration — at least one director must receive a salary of minimum €45,000/year (or equal to the company's taxable income if lower than €45,000)
Not a financial holding — the company does not qualify as a "financial company" (investment vehicles, holding companies with primarily financial assets)
Ownership structure — shares are not held 50%+ by one or more other companies (preventing artificial SME status in groups)
Dividend distribution — does not distribute dividends exceeding 13% of paid-up capital at the start of the fiscal year
Key Tax Deductions & Incentives
Innovation Income Deduction (IID)
One of Belgium's most powerful tax incentives. Companies can deduct up to 85% of net income derived from:
Patents and supplementary protection certificates
Plant breeders' rights
Orphan drug designations
Copyrighted software (developed in-house)
Data exclusivity rights
Effective tax rate: as low as 3.75% on qualifying innovation income (25% × 15% = 3.75%).
Notional Interest Deduction (NID)
Companies can deduct a fictional interest charge calculated on the incremental increase in equity (risk capital). The NID rate is set annually based on 10-year Belgian government bond yields. For 2026, the rate is approximately 0.2–0.4% (SMEs receive a 0.5% premium). While the benefit has decreased as bond yields have been low, it still provides incremental tax savings on retained earnings.
Investment Deduction
SMEs can claim an enhanced investment deduction on certain qualifying investments:
Investment Type
Deduction Rate (2026)
General investments (SMEs only)
8%
Digital investments
13.5%
Energy-saving investments
13.5%
R&D investments
13.5%
Patents
13.5%
Dividends Received Deduction (DRD)
Dividends received from qualifying participations are 100% exempt from corporate tax. Conditions: minimum 10% shareholding (or €2.5M investment value) held for at least 12 months, and the subsidiary must be subject to a "normal" tax regime.
R&D Tax Credit
Companies can claim a tax credit for R&D activities instead of an investment deduction. The credit equals 13.5% of the acquisition value of qualifying R&D assets, spread over the depreciation period. Alternatively, a one-time deduction may be chosen.
Withholding Taxes
Payment Type
Standard Rate
Treaty/EU Relief
Dividends
30%
0–15% (treaty-dependent); 0% under EU Parent-Subsidiary Directive
Interest
30%
0–15% (treaty-dependent); 0% under EU Interest & Royalties Directive
Royalties
30%
0–15% (treaty-dependent); 0% under EU Interest & Royalties Directive
Belgium has 95+ double tax treaties that reduce or eliminate withholding taxes on cross-border payments. Our tax advisory team helps structure international payments to minimise withholding tax exposure.
Loss Carry-Forward Rules
Carry-forward: Unlimited in time
Basket rule: Losses fully offset the first €1,000,000 of taxable income; only 70% of income above €1M can be offset by carried-forward losses
Carry-back: Not permitted in Belgium
Change of control: Losses may be forfeited if a change of ownership is not justified by legitimate financial or economic needs (anti-abuse rule)
Belgium vs EU Neighbours — Corporate Tax Comparison
Country
Standard Rate
SME/Reduced Rate
Belgium
25%
20% (first €100K)
Netherlands
25.8%
19% (first €200K)
Luxembourg
24.94% (combined)
—
Germany
~30% (combined)
—
France
25%
15% (first €42.5K)
Ireland
15%
12.5% (trading income)
Belgium's effective rate for innovative companies (via IID) can be as low as 3.75%, making it highly competitive for IP-intensive businesses. Use our Belgium tax calculator to estimate your tax liability.
The standard Belgian corporate tax rate is 25% (since 2020). Small and medium-sized enterprises (SMEs) that meet specific criteria benefit from a reduced rate of 20% on the first €100,000 of taxable income. Income above €100,000 is taxed at the standard 25%.
To qualify, a company must meet ALL of these criteria: be classified as a 'small company' under the CSA (not exceeding 2 of 3 thresholds: €9M turnover, €4.5M assets, 50 employees), pay a minimum director's salary of €45,000/year (or equal to taxable income if lower), not be a financial holding company, and not have shares held 50%+ by another company.
The innovation income deduction (IID) allows companies to deduct up to 85% of net innovation income from their taxable base. This applies to income from patents, supplementary protection certificates, plant breeders' rights, orphan drug designations, and copyrighted software. The effective tax rate on qualifying income can be as low as 3.75%.
Belgium implemented the EU Pillar Two minimum tax (15%) from 2024 for multinational groups with consolidated revenue exceeding €750 million. For smaller companies, there is no minimum tax, but certain deductions and carried-forward losses are capped at 70% of taxable income exceeding €1 million (the 'basket rule').
Dividends received by a Belgian company from a qualifying participation (minimum 10% shareholding or €2.5 million investment, held for at least 1 year) are 100% exempt under the Dividends Received Deduction (DRD). Dividends paid to shareholders are subject to 30% withholding tax, reduced under tax treaties or the EU Parent-Subsidiary Directive.
Yes. Belgian tax losses can be carried forward indefinitely. However, the 'basket rule' limits the use of carried-forward losses: they can fully offset the first €1 million of taxable income, but only 70% of income exceeding €1 million. Loss carryback is not permitted in Belgium.
The notional interest deduction (NID) allows companies to deduct a fictional interest on their equity, reducing the effective tax rate. The rate is based on 10-year Belgian government bond yields. For 2026, the NID rate is approximately 0.2–0.4% (adjusted annually). SMEs receive a 0.5% premium on top of the base rate.
The corporate tax return (aangifte vennootschapsbelasting/déclaration à l'impôt des sociétés) is typically due in September or October of the year following the financial year-end (exact deadline varies annually and is set by Royal Decree). Companies with a December 31 year-end usually file by late September.
Optimise Your Belgian Corporate Tax
Our tax advisory team helps you leverage SME rates, innovation deductions, and treaty benefits.
