Top 10 Signs Your Company Needs a Penetration Test

Cyber threats are no longer the sole concern of IT teams. For business leaders, understanding when to commission a penetration test is essential for safeguarding data, meeting regulatory obligations, and protecting reputation. Knowing the signs that your company needs testing can prevent small weaknesses from becoming costly breaches.

1. You’re Launching a New Application, Service or Product

Whenever you roll out a new web or mobile app, integrate a new API, or introduce a service that processes payments or personal data, you are creating new attack surfaces. Without a pen test, flaws in authentication, input validation or authorisation may persist. Testing early helps catch these issues before they are exploited.

2. Major Changes to Infrastructure or Technology Stack

If you migrate to the cloud, adopt microservices architecture, deploy IoT devices, or change your network topology, the risk landscape shifts. Old configurations, credentials or dependencies may become weak points. Recent infrastructure changes are consistently identified as a trigger for penetration testing (EliteSec, 2023).

3. Mergers, Acquisitions or Significant Business Restructuring

When you acquire or merge with another company, you take on their systems, networks and data stores. Such integrations often expose unassessed vulnerabilities. Conducting a pen test helps ensure that any inherited systems meet your security standards and do not create easy entry points for attackers.

4. Regulatory, Legal or Contractual Requirements

If you are in a regulated industry such as finance, healthcare, telecoms or payments, pen testing may be a legal or contractual requirement. In the UK, obligations under the Data Protection Act 2018, UK GDPR and the Telecoms Security Act make regular security testing essential (SecurityScorecard, 2025).

5. You’ve Not Had a Pentest for a Long Time

Security is not static. Threats and attacker tactics evolve constantly. If your last penetration test was more than a year ago, there is a strong chance new vulnerabilities have emerged (EliteSec, 2023). Regular reviews are best practice to ensure controls remain effective.

6. You’ve Had a Security Incident or Near-Miss

If your business has experienced a breach, data leakage, or even a near-miss, then a pen test is vital. Testing will identify unseen vulnerabilities that were exploited or could have been exploited and provide evidence for remediation planning.

7. Expanding Digital Footprint or Entering New Markets

Scaling up—through new offices, remote working, supply chain integrations or new jurisdictions—expands your attack surface. More endpoints and integrations mean more opportunities for attackers. Additionally, new markets may impose stricter compliance standards

8. You Handle Sensitive or Personal Data

If your organisation processes personal data, payment data, or health records, you must ensure security by design. Pen testing helps to identify weaknesses in data handling, such as insecure storage, poor encryption or improper access control, which could otherwise result in costly breaches (NCSC, 2023).

9. Clients or Partners Demand Proof

Clients, suppliers or insurers may request evidence of security testing or require certification. Having recent penetration testing results is often a contractual requirement and can provide a competitive advantage (EliteSec, 2023).

10. You Want to Maintain Reputation and Build Trust

Even when regulation is not driving the requirement, proactive security demonstrates responsibility. The reputational and financial costs of a data breach can be significant. Regular pen testing shows you take cyber security seriously, which strengthens trust with customers and partners (Bulletproof, 2024).

What “When to Pentest” Means in Practice

• Schedule regular tests: At least annually for many organisations, more frequently for high-risk sectors (Bulletproof, 2024).
• Event-driven pen testing: Triggered by changes such as new applications, infrastructure updates or incidents (Gov.UK, 2023).
• Scoping correctly: Define systems to be tested and risk priorities.
• Qualified testers: Ensure testing is performed by accredited professionals and that legal authorisations are in place (NCSC, 2023).

Why AJC Recommends Penetration Testing

At AJC we believe that knowing your vulnerabilities before attackers do is central to fraud prevention, regulatory compliance and protecting your bottom line. A pen test is not only a technical exercise but also a business decision that helps:

• Reduce the risk of fraud losses and penalties
• Demonstrate due diligence to regulators, clients and insurers
• Prioritise security investment where it matters most
• Maintain customer and stakeholder trust

If you recognise any of the signs above, it is time to consider a penetration test. AJC can work with you to scope a test that matches your business risks and compliance obligations.

How AJC Can Help

At AJC, our penetration testing team combines deep technical expertise with practical business insight. We deliver tailored testing programmes across networks, applications, cloud services, wireless environments, and physical security.

Our specialists go beyond automated tools to identify vulnerabilities in real-world context, ensuring organisations not only discover risks but also understand how to mitigate them effectively. By aligning testing outcomes with business objectives and regulatory requirements, we help client’s close gaps and strengthen resilience.

Contact us on 020 7101 4861 or email us at info@ajollyconsulting.co.uk if you think we can help.

Sources:

• Bulletproof (2024). Penetration Testing Frequency: Industry-specific Best Practices. Bulletproof. www.bulletproof.co.uk 
• EliteSec (2023). 6 Signs Your Organisation Needs a Professional Penetration Test. EliteSec. elitesec.io 
• Gov.UK (2023). Vulnerability and Penetration Testing Guidance. HM Government. gov.uk 
• National Cyber Security Centre (NCSC) (2023). Penetration Testing Guidance. NCSC. ncsc.gov.uk
• SecurityScorecard (2025). Cybersecurity Laws in the UK: What Businesses Need to Know. SecurityScorecard. securityscorecard.com

Image accreditation: Getty Images from Unsplash.com+. Last accessed on 1st October 2025. Available here.