How Often Should Your Organization Conduct Penetration Testing?

The Baseline: Annual Testing

For most organizations, annual penetration testing is the recommended minimum. A year is long enough for meaningful changes to accumulate — new services, configuration drift, new attack techniques, newly-disclosed vulnerabilities — that a fresh test will find new issues even if last year's findings have been fully remediated.

When to Test More Frequently

• Compliance requirements — PCI DSS requires annual external testing and testing after significant changes. CMMC and financial regulations may require similar frequency.
• High-risk industries — Financial services, healthcare, legal, and government contractors often justify semi-annual or quarterly testing cycles.
• Rapid environment change — If your infrastructure or application stack changes significantly, test again after those changes — don't wait for the annual cycle.
• Following a security incident — After a breach or near-miss, testing should occur as part of the remediation and validation process.
• Mergers and acquisitions — Before integrating an acquired organization's network, test it independently.
• Cyber insurance requirements — Some insurers now require periodic penetration testing as a policy condition.

Building a Testing Program

The most mature security programs treat penetration testing as an ongoing program rather than a one-time event. Grid32 offers multi-engagement and recurring testing packages for organizations building structured programs. Contact us to discuss program options →