Web App Penetration Test and Security Audit: Cost in Dublin (2026)

The verdict in three sentences

A professional penetration test (pentest) on a B2B web application runs between EUR 4,000 and 15,000 in Dublin in 2026, depending on scope and depth. The real hidden cost is not the audit but remediation, which represents 20 to 40% of the initial budget. Plan for 2 to 4 weeks between kickoff and final report, plus a retest to validate fixes before showing it to your enterprise client.

Why an enterprise client demands a pentest

Procurement and security teams at large accounts have standardized their security requirements. A SaaS vendor or business application connected to their systems must prove it resists OWASP Top 10 attacks (injection, broken authentication, sensitive data exposure, and so on). Without a recent audit report, your bid is rejected before commercial negotiation even starts.

A pentest is not an automated scan. A human auditor reproduces an attacker's behaviour: privilege escalation, authentication bypass, horizontal access to other tenants' data. This manual dimension is what reassures the client and justifies the budget.

How much a pentest costs in Dublin in 2026

Grey-box offers the best coverage-to-price ratio for a B2B application: the auditor has test accounts and saves time on mapping, which increases the real depth of testing.

What each level actually covers

Always require a report with CVSS severity, reproducible proof, and a prioritized remediation plan. A report without an action plan will not get you through the vendor audit.

Mini case study

Thomas runs an SME that publishes HR management software in Dublin (18 staff). A large listed group makes a EUR 140,000/year contract conditional on a pentest report less than 12 months old. Thomas orders a grey-box pentest at EUR 8,500. The auditor surfaces 3 critical flaws (an IDOR exposing payslips between clients) and 7 medium ones. Remediation ties up his team for 9 days, roughly EUR 3,200 of internal time, then a retest at EUR 1,800 validates the fixes. Total budget: EUR 13,500 to secure a EUR 140,000/year contract. The ROI is immediate in year one.

FAQ

How much does a web application penetration test cost in 2026?

Expect EUR 4,000 to 7,000 for a black-box pentest, and EUR 6,000 to 11,000 for grey-box (the recommended approach). Add 20 to 40% of budget for remediating the flaws found.

How long does a full security audit take?

Between 2 and 4 weeks: roughly 5 to 15 days of testing depending on the level, then report writing. The validation retest happens once your fixes are deployed, typically 3 to 6 weeks later.

Do I need to redo the pentest every year?

Yes. Most enterprise clients require a report less than 12 months old. An annual pentest plus a quarterly automated scan is a solid baseline for EUR 6,000 to 12,000/year.

What if the audit reveals critical flaws?

That is the normal scenario: a first audit almost always surfaces flaws. What matters is the prioritized remediation plan and the retest proving everything is fixed. That document is what unlocks the contract.

Is an automated scan enough to reassure an enterprise client?

No. A scan detects known vulnerabilities but misses business logic (IDOR, privilege escalation, multi-tenant access). CISOs require a manual pentest with reproducible proof.

Let's scope your project. Describe your application (stack, number of endpoints, client requirements) and we will scope the right pentest level, from scan to white-box audit, with costed remediation. Detailed quote within 48 h. WhatsApp +221 77 596 93 33.