How often should you get a penetration test? It’s one of the most common questions we hear, and the honest answer is: it depends. But that answer, while accurate, isn’t particularly helpful. So let’s break down what actually drives testing frequency and how to build a schedule that matches your risk profile.
The wrong answer is “once, three years ago.” The second wrong answer is “annually, because compliance says so.” Compliance-driven testing schedules treat security as a checkbox rather than a continuous process, and they leave long gaps where new vulnerabilities go undetected.
What Should Drive Your Testing Schedule
Several factors should influence how frequently you test. The rate at which your infrastructure changes matters most. An organisation that deploys new applications monthly needs more frequent testing than one running a stable, rarely modified environment.
Your threat profile matters too. Organisations in financial services, healthcare, and critical national infrastructure face more persistent and sophisticated threats than those in lower-risk sectors. Higher threat levels justify more frequent testing.
William Fieldhouse, Director of Aardwolf Security Ltd, comments: “Annual penetration testing is the minimum, not the target. Organisations that test after every significant infrastructure change, after major application releases, and before key compliance deadlines maintain a much stronger security posture than those that treat testing as an annual checkbox.”
Different Tests for Different Purposes
Not every test needs to be a full-scope engagement. Build a testing programme that includes different types of assessments at different intervals.
Annual comprehensive penetration tests provide thorough coverage. Quarterly vulnerability scans maintain ongoing visibility. Application-specific tests after major releases catch new vulnerabilities before they reach production. And ad hoc testing after significant infrastructure changes ensures new systems don’t introduce unexpected weaknesses.
Choosing a best penetration testing company that offers flexible engagement models lets you scale your testing programme to match your needs without paying for more scope than you require.
The Compliance Angle
Most regulatory frameworks specify minimum testing frequencies. PCI DSS requires annual penetration testing and quarterly vulnerability scans. ISO 27001 requires regular testing without prescribing a specific interval. Cyber Essentials Plus includes an annual technical verification.
These requirements set a floor, not a ceiling. Meeting compliance minimums keeps auditors satisfied but may not keep attackers out. Build your testing programme around your actual risk profile and let compliance requirements become a natural byproduct.
Getting Started or Getting More From Your Testing
If you’re testing annually, consider adding quarterly scans and post-change assessments to close the gaps between tests. If you’re not testing at all, start with a baseline assessment to understand your current security posture.
Getting a penetration test quote is a straightforward first step regardless of where you are in your security journey. Understanding the scope, approach, and cost of professional testing helps you plan a programme that fits your budget and your risk appetite. Security testing is an investment that pays dividends every time it finds a vulnerability before an attacker does.
