How Often Should You Do a Penetration Test?
If you’re wondering how often to conduct a penetration test, the answer depends on one thing:
How much risk can your business afford to ignore?
In a 2025 world of cloud-native apps, ransomware gangs, and evolving compliance frameworks, penetration testing is no longer optional — and it’s no longer annual-only.
This guide walks you through:
- Industry best practices
- Compliance-driven frequency
- Risk-based testing schedules
- How to plan an effective cadence
- When you need more than once a year
Industry Best Practices: What the Top Companies Do
According to the SANS Institute, most security-conscious companies conduct penetration tests at least once per year. But leading tech firms, financial institutions, and critical infrastructure providers follow more frequent cadences.
| Company Size / Risk Level | Recommended Frequency |
|---|---|
| Small business (low risk) | Annually |
| Mid-size SaaS or regulated | Every 6–12 months |
| Enterprise / high-risk | Quarterly or ongoing (PTaaS) |
| Post major changes | Immediately after launch |
“The moment your environment changes, your last test becomes outdated.”
— NIST SP 800-53 (source)
Compliance Requirements for Penetration Testing Frequency
Different standards and laws mandate different frequencies:
PCI DSS
- Requirement 11.4: External and internal pen tests at least annually, or after any significant change.
View PCI DSS v4.0 →
SOC 2
- Not prescriptive, but auditors often expect annual pen testing and proof of remediation.
HIPAA
- Requires “regular technical assessments” — typically interpreted as yearly, plus post-change.
ISO/IEC 27001
- Requires security testing as part of risk treatment — often scoped as annual or biannual.
FedRAMP / NIST 800-115
- Agencies must conduct tests at least annually and after system changes.
Risk-Based Testing: It’s Not One-Size-Fits-All
Frequency should match the sensitivity of your systems and rate of change. Use this model:
| Factor | Test More Often If… |
|---|---|
| You push code weekly | High CI/CD velocity = frequent unknowns |
| You handle PII, PHI, cardholder data | Risk = target value to attackers |
| You’re cloud-native or hybrid | Constant config drift = new exposures |
| You use open-source components | Frequent vulnerabilities, rapid updates |
| You operate globally | More regulations = more scrutiny |
When You Should Schedule a Penetration Test
Use these trigger events to drive testing — regardless of your regular schedule:
- Launching a new web application
- Major codebase or infrastructure changes
- Migrating to cloud or new environment
- After a security incident or breach
- New compliance audit or certification year
- Mergers, acquisitions, or partnerships
Continuous Testing with Pen Test as a Service (PTaaS)
For companies with agile or DevSecOps pipelines, a once-a-year test won’t cut it.
Pen Test as a Service (PTaaS) platforms offer:
- On-demand testing
- Rapid retesting
- Always-on dashboards
- Shorter remediation cycle
Learn more about PTaaS from providers like:
Summary: So, How Often Should You Do a Pen Test?
| Your Situation | Recommended Frequency |
|---|---|
| No changes + low risk | Once per year |
| Regulated (PCI, SOC 2, HIPAA) | Every 6–12 months, plus post-change |
| High-risk targets | Quarterly or continuous |
| Deploying code often | Test quarterly or use PTaaS |
| Major system changes | Immediately afterward |
Don’t just do it to check a box. The goal is to:
- Catch issues before attackers do
- Strengthen incident response
- Support compliance and build trust