Can You Combine Multiple Belgian Grants? Double-Funding Rules Explained
Many Belgian businesses receive grants from multiple sources. But is it legal to combine them? This guide explains Belgium's double-funding rules, when you can stack grants, and when doing so would disqualify your application.
What is double funding?
Double funding (also called "cumul" in French or "dubbelfinanciering" in Dutch) occurs when the same project costs are financed by more than one public subsidy. Belgian and EU regulations strictly limit this to prevent companies from profiting from public funds beyond the actual cost of their project.
The core rule: total public funding from all sources combined cannot exceed 100% of eligible project costs. In practice, most grant programs set their own lower limits (typically 70–80% maximum total public aid).
When can you combine grants in Belgium?
Combining grants is allowed in many situations, as long as the total aid stays within limits:
- Different cost categories — e.g., one grant covers personnel, another covers equipment
- Different project phases — e.g., a feasibility study grant and a separate R&D project grant
- Regional + federal — regional grants and federal tax incentives often explicitly allow cumulation
- Regional + EU — Horizon Europe grants can typically be combined with regional support for complementary activities
- Different projects — if you run genuinely separate projects, each can have its own grant
When is it NOT allowed?
Double funding is forbidden when:
- The same costs are claimed under two grants — this is the most common violation
- Total public aid exceeds the maximum intensity set by EU State Aid rules (varies by region and company size)
- The grant terms explicitly exclude cumulation — some programs state "non-cumulable"
- The funding covers the same personnel hours on the same project under two different subsidies
- You fail to declare other grants received — non-disclosure is treated as fraud
Examples of allowed combinations
These are common, legitimate grant combinations used by Belgian businesses:
VLAIO R&D project subsidy + federal partial exemption of withholding tax for R&D personnel
Innoviris SME R&D grant + EU Horizon Europe grant (for different project activities)
SPW investment aid (equipment) + SPW innovation voucher (feasibility study) — different cost categories
VLAIO ecology premium (green investment) + federal energy investment deduction
Regional export grant (AWEX/FIT) + federal tax credit for international trade fairs
Examples of forbidden combinations
These scenarios would violate double-funding rules:
Claiming the same researcher's salary under both a VLAIO R&D grant and an Innoviris grant
Using two regional grants from the same body for identical cost items in the same project
Receiving 60% VLAIO co-financing + 50% EU co-financing on the same costs (exceeding 100%)
Applying for the same feasibility study at both SPW and Innoviris
Not declaring a federal tax incentive when applying for a regional grant that limits total aid intensity
How to check if your combination is allowed
Follow these steps before combining grants:
- Read the grant terms carefully — look for "cumulation" or "cumul" clauses
- Calculate total aid intensity: add up all public funding as a percentage of eligible costs
- Check EU State Aid maximum intensities for your region and company size
- Ensure no cost overlap — map each cost item to exactly one grant
- Declare all other grants in your application — transparency is required
- Contact the grant body's advisor if in doubt — they prefer to clarify upfront
Ask Lucas to check for double-funding risks
Not sure if your grant combination is allowed? Lucas, our AI grant expert, can analyze your situation and flag potential double-funding risks. Describe your company, your grants, and your project — Lucas will check the rules for you.
Ask Lucas nowFrequently asked questions
What happens if I accidentally double-fund?▼
If discovered during the project, you'll typically be asked to return the excess funding. If discovered after completion (during an audit), you may need to repay the full grant amount plus interest. In severe or intentional cases, you could be excluded from future grant programs and face legal consequences.
Do I need to declare grants from other countries?▼
Yes. EU State Aid rules apply across all member states. If you receive funding from another EU country (e.g., through a subsidiary), you must declare it when it applies to the same project or costs. Non-EU grants generally don't fall under cumulation rules but should still be disclosed.
Can I combine a grant with a subsidized loan?▼
Yes, but the grant equivalent of the subsidized loan counts toward total aid intensity. For example, if a loan has a 2% interest rate subsidy, the net present value of that subsidy is added to your total public aid. Your grant body can help calculate this.
Is the federal withholding tax exemption for R&D considered "state aid"?▼
Yes, it is classified as a tax incentive under EU State Aid rules. However, it's specifically designed to be cumulated with regional R&D grants — the combined total just can't exceed maximum aid intensity thresholds. This is one of the most common and safest combinations in Belgium.