The Real Cost of a Data Breach for a Belgian SME in 2025

When Belgian SME owners think about cybersecurity investment, the conversation usually stalls at cost. "We're too small to be targeted." "We can't afford it right now." "We'll deal with it if something happens."

The problem with this reasoning is that it dramatically underestimates what "dealing with it" actually costs.

Here are the real numbers — and they are not theoretical.

The Global Benchmark

IBM's 2024 Cost of a Data Breach Report puts the global average cost of a data breach at USD 4.88 million — the highest figure on record. For SMEs with fewer than 500 employees, the average is lower, but still devastating in proportion to their revenue: the report identifies SME breach costs regularly exceeding EUR 1 million when all factors are included.

ENISA's 2023 Threat Landscape report confirms that ransomware and data exfiltration attacks against European SMEs have increased sharply, with Belgian organisations specifically appearing in incident statistics at rates disproportionate to their size — largely because SMEs are used as stepping stones into larger supply chains.

What the Cost Actually Includes

Most SME owners think of a breach in terms of IT recovery costs. That is only a fraction of the real picture.

Direct costs:

• Incident response and forensics: EUR 15,000 to EUR 80,000 for a credible IR firm
• System restoration and data recovery: EUR 10,000 to EUR 150,000 depending on infrastructure complexity
• Ransomware payment (if paid): median demand for SMEs in 2024 was approximately EUR 200,000 per Sophos research — with no guarantee of key delivery
• Legal and regulatory counsel: EUR 10,000 to EUR 50,000 minimum

Regulatory costs:

• GDPR fines under Article 83 can reach EUR 10 million or 2% of global annual turnover for standard violations, and EUR 20 million or 4% for the most serious. The Belgian DPA (GBA) has issued fines against SMEs — this is not theoretical.
• NIS2 adds administrative fines of up to EUR 7 million (for important entities) or EUR 10 million (for essential entities) for non-compliance with reporting obligations.

Operational costs:

• Downtime: the average ransomware recovery time is 22 days according to Coveware. At EUR 5,000 per day lost revenue for a 50-person SME, that is EUR 110,000 before you count staff cost.
• Customer notification: mandatory under GDPR Article 34 when there is high risk to individuals. The administrative and communication cost is significant.
• Cyber insurance excess and premium increase: expect your premium to double or triple post-breach.

Reputational costs:

• Customer churn: Verizon's DBIR data consistently shows that 60% of SMEs that suffer a significant breach lose a major customer within 12 months.
• Lost tender opportunities: public sector and enterprise procurement increasingly require security certifications. A recent breach disqualifies you from many processes.
• Key staff departure: security incidents create internal trust crises. Losing a key technical or commercial employee post-breach is common and expensive.

A Conservative Belgian SME Scenario

Consider a 40-person professional services firm in Brussels. A phishing email compromises an employee account. The attacker spends three weeks inside the network, exfiltrates client contracts and personal data, then deploys ransomware.

Conservative cost estimate:

• IR and forensics: EUR 35,000
• System restoration: EUR 25,000
• Legal and DPA counsel: EUR 20,000
• Downtime (15 days at EUR 4,000/day): EUR 60,000
• GBA fine (proportionate, negotiated): EUR 40,000
• Customer notification and PR: EUR 15,000
• Lost contracts (2 clients, conservative): EUR 120,000

Total: EUR 315,000 — for a company that probably had an annual IT budget of EUR 30,000.

Prevention Is Not Expensive. Recovery Is.

A structured cybersecurity programme for a Belgian SME — covering risk assessment, basic controls, staff awareness training, and a tested incident response plan — typically costs EUR 15,000 to EUR 40,000 annually when managed through an experienced advisor. That is less than 10% of the conservative breach cost above.

The question is not whether you can afford cybersecurity. The question is whether you can afford not to have it.