When planning your cybersecurity budget, the most frequent question we hear at Attack Vector is straightforward: how much should we budget for a penetration test this year? It is a critical question for businesses aiming to secure their infrastructure or achieve compliance standards like ISO 27001.
The reality is that pricing is not a flat fee. In the UK market, the cost of a penetration test is almost exclusively determined by two things: the day rate of the security consultant and the number of days required to cover your specific scope.
Understanding UK Day Rates in 2026
To budget accurately, start with current market day rates. For penetration testing in 2026, UK day rates sit anywhere between £600 and £1,200 per day.
That is a wide range, and there is a reason for it. Penetration testing has become a crowded market: everyone from independent consultancies and generalist IT providers through to large accredited security firms now offers some form of testing service, and their pricing reflects very different business models, methodologies, and reporting quality.
It is tempting to assume the day rate tracks the skill of the tester, but that is often not the case. A higher rate does not automatically buy you a better tester. Large consultancies carry significant overheads, and a chunk of their day rate goes towards project management layers, sales processes, and account teams rather than time spent actually testing. For smaller and simpler engagements, you can end up paying for services you never needed. Meanwhile, some of the most experienced testers in the industry run their own consultancies with minimal overheads, and charge lower rates than firms whose testing is delivered by far more junior staff.
What actually matters is who is doing the testing and how. A practitioner holding a chartered title such as ChCSP (Chartered Cyber Security Professional), awarded through the UK Cyber Security Council, or recognised certifications from accrediting bodies like The Cyber Scheme, gives you assurance that the work meets stringent UK government and industry standards. That level of expertise is what uncovers the complex logic flaws automated tools simply cannot see, regardless of the size of the company behind the quote.
Scope and Time Requirements
Once the day rate is established, the total cost depends entirely on how many days the engagement takes. A standard brochure website might need only three days of testing, whereas a bespoke web application with complex user roles and backend databases could take a week or more. Accurate scoping is what turns a vague estimate into a reliable price.
If a provider quotes a suspiciously low total price, exercise caution. In almost all cases, an exceptionally low quote means the provider is running an automated vulnerability scan and packaging the output as a manual report. That kind of report rarely survives scrutiny from an auditor or compliance assessor.
Calculate Your Indicative Price with Attack Vector
Waiting days for a scoping call just to get a rough idea of costs is frustrating. That is why Attack Vector built an automated pricing calculator: enter a few simple details about your digital estate and it instantly returns indicative pricing and clear day rates tailored to your exact needs.
As a specialist consultancy, our day rates pay for testing, not account management. Get your indicative price in minutes, not weeks, with our instant quote calculator.
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