Guides10 min readUpdated 2026-04-13

Belgian Grants β€” The 10 Most Common Mistakes SMEs Make

Avoid the 10 most common mistakes Belgian SMEs make when applying for grants: late applications, wrong NACE codes, poor project descriptions, and more practical tips.

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Why Belgian SMEs keep missing out on grants

Belgian grant agencies distribute billions of euros each year, yet a large portion of SME applications get rejected β€” not because companies are ineligible, but because they make avoidable mistakes. After analysing hundreds of applications, the same ten errors keep coming up.

Every one of these mistakes is preventable. If you are preparing a grant application, use this guide as your pre-submission checklist.

Mistake 1 β€” Applying too late

Many grants have fixed submission windows, and even rolling grants have budget ceilings. The most common timing mistake is starting the process when the deadline is already tight. Grant applications require financial projections, project descriptions, and supporting documents that cannot be rushed.

Start preparing at least 6-8 weeks before any deadline. For complex innovation grants, allow 3 months.

Mistake 2 β€” Wrong NACE code

Your NACE code determines eligibility for many Belgian grants. Companies registered years ago may have a code that no longer reflects current activities. A software company registered as general consultancy might be excluded from innovation grants.

Check your code in the KBO/BCE and update it before applying. Use the BelGrant eligibility checker to see how it affects your options.

Mistake 3 β€” Vague project description

Grant evaluators can immediately tell the difference between a carefully crafted description and one written in a rush. Describing what you want to buy rather than what problem you solve is the most common weakness.

Structure your description around the problem, proposed solution, methodology, expected results, and business impact. Use specific numbers wherever possible.

Mistake 4 β€” Forgetting co-financing

Most grants cover 25% to 60% of costs. Many SMEs apply without budgeting for the remainder.

Calculate total project cost and confirm you can fund the uncovered portion before applying.

Mistake 5 β€” Combining incompatible grants

Applying for multiple grants covering the same costs triggers repayment obligations.

Map which costs are covered by which grant and ensure no overlap. Check de minimis caps.

Mistake 6 β€” Not tracking de minimis aid

The de minimis cap is €300,000 over three rolling years. Many SMEs exceed it unknowingly.

Maintain a tracking spreadsheet and verify headroom before each new application.

Mistake 7 β€” Starting before approval

Most grants require you not to start before submitting the application. Pre-start costs are not reimbursed.

Read conditions carefully for the eligible start date. Do not sign contracts or begin work before it.

Mistake 8 β€” Poor record-keeping

Agencies require timesheets, invoices, and progress reports. Poor records lead to clawbacks during audits.

Set up project administration from day one. Keep documents for at least 10 years.

Mistake 9 β€” Applying for the wrong program

Belgium has hundreds of programs. SMEs often apply for the first one they find rather than the best fit.

Use the BelGrant assistant to match your situation with the most appropriate grants.

Mistake 10 β€” Going it alone

Large innovation grants have complex requirements where professional help significantly increases success.

For grants over €100,000, consider a specialised consultant. The fee is often a fraction of the potential grant.

FAQ

What is the biggest reason Belgian grant applications fail?

Vague project descriptions that describe purchases rather than problems solved. Evaluators need clear problem statements, specific methodology, measurable results, and demonstrated business impact.

How do I track de minimis aid in Belgium?

There is no central registry. Track all de minimis grants received across your company and group entities over three rolling fiscal years in a spreadsheet. The total must stay under €300,000.

Can I start a project before grant approval?

Most Belgian grants require that you do not start before submitting the application. Some require waiting for formal approval. Always check the specific program conditions for the eligible start date.

Grants mentioned in this article

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