State Aid in Belgium — Understanding EU Rules

Every grant, subsidy, or tax incentive that a Belgian company receives from public authorities is potentially classified as State Aid under EU law. The European Commission controls State Aid to prevent governments from giving unfair competitive advantages to specific companies, which would distort the EU's internal market.

For Belgian SMEs, this means there are legal limits on how much public support you can receive. Understanding these limits is essential if you are applying for multiple grants, combining regional and federal support, or accessing EU funding alongside Belgian programs. Exceeding State Aid limits can result in clawback — meaning you could be required to repay grants you have already received.

This guide explains the key EU State Aid rules as they apply to Belgian grants in practical terms. If you are unsure how State Aid limits affect your specific situation, consult the BelGrant assistant for guidance.

The de minimis regulation is the simplest State Aid framework. It allows public authorities to grant small amounts of aid to companies without needing prior European Commission approval, because the amounts are considered too small to distort competition. As of 2024, the de minimis ceiling is €300,000 per single undertaking over a rolling three fiscal year period (increased from the previous €200,000 threshold).

Most small Belgian grants — KMO-portefeuille, Chèques-entreprises, small advisory subsidies — are awarded under the de minimis regulation. When you apply for these grants, you are typically asked to declare how much de minimis aid you have received in the current and two preceding fiscal years. If the new grant would push you over the €300,000 ceiling, the granting authority cannot approve it.

An important nuance: the de minimis ceiling applies to the "single undertaking," which includes your company and any companies linked to it through ownership or control. If your company is part of a group, the de minimis aid received by all companies in the group counts toward the shared ceiling. This catches many companies by surprise, especially those with parent companies or sister entities that have also received public support.

Larger grants that exceed de minimis thresholds typically fall under the General Block Exemption Regulation (GBER). GBER allows EU member states to grant State Aid for specific purposes — R&D, innovation, environmental protection, training, regional development — without requiring individual European Commission approval, as long as the aid meets predefined conditions.

Most Belgian R&D grants from VLAIO, Innoviris, and SPW are awarded under GBER provisions. The GBER sets maximum aid intensities (the percentage of eligible costs that can be covered by public funding) depending on the type of activity and the company size. For example, industrial research can receive up to 50% aid intensity for SMEs, while experimental development can receive up to 25% for large companies and up to 45% for small enterprises.

GBER also defines which costs are eligible, what documentation is required, and what reporting obligations apply. When a grant program is designed under GBER, these conditions are built into the program rules. As an applicant, you primarily need to ensure that your company meets the size criteria (micro, small, medium, or large enterprise) and that your project genuinely falls within the funded activity category.

Cumulation rules determine how different sources of public funding interact. The core principle is that the same eligible costs cannot receive more public funding than the maximum aid intensity allowed under the applicable framework. If GBER allows 50% aid intensity for your project and you already receive a 30% grant from VLAIO, you can receive at most an additional 20% from another source for the same costs.

De minimis aid can generally be cumulated with GBER aid, but only up to the maximum aid intensity set by GBER for the specific activity. De minimis aid for different eligible costs (not overlapping with the GBER-funded costs) can be received without affecting the GBER aid intensity calculation.

This is where grant strategy becomes important. If you structure your project so that different cost categories are funded by different programs, you can often access more total support than if you apply for multiple grants covering the same costs. Personnel costs might be partially covered by one grant, equipment by another, and advisory services by a third — each with its own aid intensity limit.

Belgian grant programs typically ask applicants to disclose all other public support received or applied for. Providing inaccurate or incomplete information about other aid can lead to grant rejection, recovery orders, or legal penalties. Always maintain a complete overview of all public support your company and its linked entities have received. See also our guide on double funding rules for more detail on combining Belgian grants.

For most Belgian SMEs, State Aid rules are manageable but require attention. Keep a running record of all public support received, including the legal basis (de minimis or GBER), the amount, the date, and the granting authority. This record is essential for completing State Aid declarations in future applications.

If you are a small company applying for one or two grants per year, you are unlikely to hit State Aid ceilings. The rules become more important when you are systematically combining multiple funding sources — for example, a VLAIO R&D grant plus a federal tax credit plus Horizon Europe funding plus regional investment support. Each of these may have different State Aid implications, and keeping track is your responsibility as the beneficiary.

Companies that are part of a group should pay special attention to the "single undertaking" concept. If your parent company or a sister company in Belgium has received grants, those amounts may count toward your de minimis ceiling or affect your GBER aid intensity limits. Consult a grants advisor if your corporate structure is complex.

Finally, be aware that State Aid rules can change. The current GBER regulation runs until 2026 with possible extensions. The de minimis regulation was updated in 2024. Monitoring updates to these frameworks is important if your business relies heavily on public funding. For a personalized assessment of how State Aid rules affect your grant strategy, use the BelGrant assistant.