How Often Should You Run a Penetration Test?
The traditional answer is "once a year." That answer comes from a time when software shipped a few times a year. If your team deploys every day, an annual pentest tests a version of your product that stopped existing months ago.
The minimum: compliance baselines
Most frameworks converge on a similar floor:
| Framework | Typical expectation |
|---|---|
| PCI DSS 4.0 | At least every 12 months and after significant change |
| SOC 2 | Commonly annual, as evidence for monitoring criteria |
| ISO 27001 | Risk-based, commonly annual |
| HIPAA (proposed rule) | At least every 12 months |
| Enterprise vendor reviews | A report from the last 12 months |
Annual testing is the minimum that keeps auditors and customers satisfied. It is rarely enough to keep attackers out.
Signals you need to test more often
- You deploy weekly or faster. Every release can introduce a new access control bug or injection point.
- You handle sensitive data: payments, health, financial or identity data.
- You recently changed architecture: new APIs, a move to microservices, a cloud migration or a new authentication provider.
- You are growing quickly. More customers means a bigger target and more value in your data.
- You use a lot of AI-generated code. Generated code ships fast and often skips authorisation checks.
Event-driven testing
Beyond a schedule, test after events that change your risk:
- Launching a new product or major feature.
- Adding a new user role or permission model.
- Opening a public API.
- Integrating a new third-party service with access to your data.
- Fixing a critical vulnerability, to confirm the fix works and nothing similar remains.
The case for continuous testing
Continuous testing means running automated security tests on every deploy or on a short cycle, such as weekly. The benefits are practical:
- Bugs are cheaper to fix when the developer who wrote them still remembers the code.
- Compliance evidence accumulates naturally across the audit period.
- No surprises. Your annual manual test confirms good hygiene instead of discovering a backlog.
Historically, continuous testing meant only shallow scanning. AI pentesting agents change that: they can authenticate, explore workflows, chain findings and verify exploitability, which used to require a human.
A sensible schedule for a SaaS startup
- Every deploy or weekly: automated AI pentesting of your app and APIs.
- Continuously: attack surface monitoring for new subdomains, open ports and leaked keys.
- Annually: a deeper review of your most sensitive workflows, plus a report for customers and auditors.
SecurityInfinity runs on demand, so you can test on every release and produce a fresh report whenever a customer asks. Start free with 100 credits.
Frequently asked questions
Is quarterly pentesting worth it?
For teams that ship often or handle sensitive data, yes. Quarterly testing cuts the window in which a new vulnerability goes unnoticed from a year to a few months.
Does continuous testing replace an annual pentest?
It can for many startups, if it is deep enough to include authenticated testing and verified findings. Some customers or regulators still require a specific annual test.
What counts as a significant change?
New internet-facing applications, major features touching authentication or payments, infrastructure changes and new integrations with access to sensitive data.