Many organisations treat penetration testing as an annual compliance requirement. The test happens in March, the report arrives in April, a few critical findings get patched by June, and everyone forgets about security until the following year. This approach made sense a decade ago. It does not reflect the threat landscape of 2026.
Attack surfaces change constantly. Development teams push code updates weekly. Cloud infrastructure scales up and down based on demand. Employees install new SaaS tools without IT approval. Each change introduces potential vulnerabilities that an annual test will not catch for months.
The Gap Between Tests
Consider a business that completes its annual penetration test in January. A critical vulnerability in a widely used framework gets disclosed in February. The next scheduled test is twelve months away. That leaves almost a full year during which attackers can exploit a known weakness while the organisation assumes its test results still reflect reality.
William Fieldhouse, Director of Aardwolf Security Ltd, comments: “Annual testing gives you a photograph of your security posture on one specific day. Everything that changes between tests, and that includes new deployments, infrastructure modifications, and freshly disclosed CVEs, goes unexamined. We recommend quarterly testing at a minimum, supplemented by continuous vulnerability scanning to bridge the gaps.”
A Smarter Approach to Testing Frequency
Replace the annual cycle with a programme that matches your rate of change. Organisations running agile development with frequent releases benefit from quarterly or even monthly targeted tests. Pair these with vulnerability scanning services that run continuously and flag new exposures within days rather than months.
Prioritise what you test based on risk. Customer-facing web applications and internet-exposed infrastructure deserve more frequent attention than isolated internal systems. Focus your budget where the impact of a breach would hurt most.
Getting Started
Review your current testing schedule and ask whether it matches your deployment cadence. If your development team ships weekly but security testing happens annually, you have a gap that attackers can exploit.
Request a penetration test quote and discuss a tailored programme rather than a one-off engagement. Good security consultancies work with clients to design testing schedules that fit both budget and risk appetite. The goal is continuous assurance, not a compliance tick-box.
The same logic applies to infrastructure changes. A new web application deployed in April, a cloud migration completed in July, or a VPN appliance added in September all introduce risk that sits untested until the following January. Each represents a potential entry point existing completely outside the testing window.
Budget is often cited as the barrier to more frequent testing. In reality, spreading testing across the year often costs less than a single large annual engagement because scope can be targeted to recent changes rather than retesting the entire environment from scratch every time.
Threat intelligence feeds publish new CVEs daily. If your scanning and testing cadence cannot keep pace with the rate at which new vulnerabilities appear, your security posture degrades a little more with each passing week. Continuous testing bridges this gap by catching new exposures as they emerge rather than discovering them months later.
Security threats do not operate on an annual cycle. Your defences should not either.