The verdict in three sentences
A penetration test (pentest) before going live costs EUR 3,500 to 12,000 in 2026 depending on scope; a code audit EUR 2,000 to 8,000. The real deliverable isn't the report, it's the prioritized remediation of critical vulnerabilities. Security is an ongoing discipline: an annual audit plus a pentest at every major release, not a one-off check before launch.
Scope and budget of a security audit
Budget tracks scope: number of roles, business complexity, presence of payments or sensitive personal data. A black-box pentest (no code access) is cheaper than a white-box audit combining pentest and code review.
| Service | Scope | 2026 cost |
|---|---|---|
| Black-box pentest | Standard application | EUR 3,500 - 6,000 |
| Grey/white-box pentest | Multiple roles, payments | EUR 6,000 - 12,000 |
| Code audit | Static review + secrets | EUR 2,000 - 8,000 |
| Guided remediation | Assisted fixes | 20 - 40 % of project |
| Post-fix re-test | Verification | EUR 1,000 - 3,000 |
What an OWASP pentest covers
A serious pentest relies on the OWASP framework and covers the most exploited vulnerabilities in 2026. The report ranks each flaw by severity and provides a remediation plan.
| OWASP category | Example risk | Typical severity |
|---|---|---|
| Broken access control | Access to another account's data | Critical |
| Injection (SQL, XSS) | Data theft or corruption | Critical |
| Poor secrets management | Exposed API key | High |
| Security misconfiguration | Missing CSP headers | Medium |
| Vulnerable components | Outdated dependency | Medium to high |
| Insufficient logging | Undetected attack | Medium |
GDPR, secrets and headers
Beyond application flaws, three tracks are unavoidable in 2026: secrets management (no plaintext keys in code), security headers (CSP, HSTS) and GDPR compliance (minimization, encryption, processing register). An app handling personal data without these basics exposes itself to sanctions and lost customer trust.
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Mini case study
Karim, IT director of a services SME in Toulouse, must secure a business app before going live. Scope: grey-box pentest at EUR 8,500, code audit at EUR 4,000, guided remediation at EUR 5,000. Total: EUR 17,500. The pentest reveals two critical access-control flaws; exploiting them would have exposed 3,200 customers' data. The cost of a breach (notification, sanctions, customer loss) is estimated above EUR 100,000: the audit shows obvious ROI from the first incident avoided.
FAQ
How much is a penetration test in 2026? Between EUR 3,500 and 12,000 depending on scope: black-box for a simple app, white-box for an app with multiple roles and payments.
Pentest or code audit: which one? Ideally both. The pentest simulates a real attacker; the code audit finds structural flaws before they're exploitable. A code audit costs EUR 2,000 to 8,000.
How often should you audit? An annual audit at minimum, plus a pentest at every major release or significant architecture change.
Is remediation included? Rarely in the pentest price. Plan 20 to 40 % of the project for fixes and a re-test of EUR 1,000 to 3,000 to validate them.
What does a non-GDPR-compliant app risk? Sanctions, but above all lost customer trust. Encryption, data minimization and a processing register are the minimum baseline in 2026.
Let's scope your project. Describe your application (roles, payments, sensitive data) and your go-live date: we'll frame the pentest and audit scope (EUR 3,500-12,000). Detailed quote within 48 h. WhatsApp +221 77 596 93 33.
Mohamed Bah
Fondateur, Kolonell
Passionate about digital and entrepreneurship in Africa, Mohamed has been helping Sénégalese businesses with their digital transformation since 2020. Founder of Kolonell, he believes every SME deserves a professional and accessible online présence.
