The verdict in three sentences
An application pentest is no longer optional when you sell to enterprises: it is an entry condition demanded by their security teams. In 2026, budget EUR 6,000-20,000 depending on scope, with an OWASP-aligned report and a remediation plan. That budget is a commercial investment: it unlocks far bigger contracts.
Audit cost by scope
2026 order of magnitude, ex-VAT, for a London business web application.
| Audit type | Scope | Cost | Timeline |
|---|---|---|---|
| Automated scan | Known vulnerabilities | EUR 1,500-4,000 | 3-5 days |
| Black-box pentest | App without code access | EUR 6,000-12,000 | 2-3 weeks |
| Grey-box pentest | App + test accounts | EUR 10,000-18,000 | 3-4 weeks |
| Full audit + code review | App + infra + code | EUR 15,000-30,000 | 4-6 weeks |
| Post-remediation re-test | Fix verification | EUR 2,000-5,000 | 1 week |
To unlock a first enterprise client, the grey-box pentest (EUR 10,000-18,000) is the 2026 standard: it covers the OWASP Top 10 and provides a report presentable to the client's procurement team.
Commercial impact and frequency
The audit does not only cut risk: it speeds up the sales cycle and reassures buyers.
| Benefit | Without audit | With annual audit |
|---|---|---|
| Enterprise deals reachable | Often blocked | Frequently unblocked |
| Sales cycle length | +4-8 weeks (questionnaires) | Shortened (report ready) |
| Cyber insurance premium | High | Cut 10-25 % |
| Recommended frequency | - | Annual + each major release |
| Average annualised cost | 0 | EUR 8,000-15,000/yr |
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Mini case study
Thomas, head of a 15-person B2B SaaS vendor in London, is refused a EUR 90,000/yr contract by an industrial enterprise: their security team demands a recent pentest. He orders a grey-box pentest at EUR 14,000, 3-week timeline, plus EUR 4,000 for a re-test after fixing 2 medium flaws. Total cost: EUR 18,000. Result: the EUR 90,000/yr contract is signed, and the same report unlocks two other enterprise prospects within the year (about EUR 120,000/yr combined). Payback: the pentest pays for itself in under a month of billing. Verdict: audit profitable from the first deal.
FAQ
What is the difference between a scan and a pentest? An automated scan detects known vulnerabilities for EUR 1,500-4,000; a pentest adds human expertise that finds logic flaws and attack chains, for EUR 6,000-20,000. Enterprises demand the pentest.
How often should I audit? At least once a year, plus a targeted test at each major release. A report older than 12 months is often judged obsolete by procurement teams in 2026.
Is the OWASP report essential? Yes: the OWASP Top 10 is the reference expected by most security teams. A report structured to that standard is directly usable by your client.
Is remediation included? The report lists the flaws and recommends fixes, but developing them is usually separate. Budget for the fixes and a re-test of EUR 2,000-5,000 to validate.
Does an audit guarantee no flaws? No, no audit guarantees zero risk. It sharply reduces the attack surface and proves your diligence, which is exactly what your clients and insurers ask for.
Let's scope your project. Describe your application, its stack and the enterprise client to reassure, and we will scope the pentest and price audit + re-test. 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.
