Cyber threats aren’t something that just happen to big enterprises anymore. If you’re running a business in the UK, you’re a target. And it’s not because you’re special and hackers see you as a high value target, it’s usually because you’re an easy target.
That’s backed up in the data too, as according to the UK Government’s Cyber Security Breaches Survey 2025, 43% of businesses reported a cyber breach or attack in the last 12 months. That’s approximately 612,000 businesses in the UK that have identified a cyber attack in the previous 12 months.
So, how prepared are you for should you become a target?
How does Penetration Testing help UK businesses?
Penetration Testing (often shortened to Pen Testing) is when you hire experts to try and hack into your systems on purpose. It’s controlled, legal, and done by professionals. This is often referred to as Ethical Hacking.
The goal is to find weaknesses before someone else does. And the tester will pick up on any breadcrumbs or pull on any threads within the digital environment that aren’t properly secured to emulate what would happen in a real-world attack.
Because a penetration test identifies real-time vulnerabilities within architecture, there are industries where an annual penetration test is a regulatory requirement, such as financial services, public sector bodies, critical national infrastructure, healthcare and telecoms.
It’s additionally also advisable for technology and SaaS providers, manufacturing businesses, and any companies working with regulated companies to carry out annual penetration testing.
At Incursion Cyber Security after we perform the penetration test, we’ll then provide you with actionable reports and workshops to close security gaps before they are exploited.
Penetration Testing vs. Vulnerability Assessments
This is something that gets asked a lot. But the main difference between the two is usually time and scope. And that makes a difference with what you’re trying to achieve.
A vulnerability test is a piece of software that runs in the background by itself and checks for software updates and known bugs. It’s automated and it’s quick.
A penetration test is a top to bottom assessment in which a human being replicates the actions of an attacker over the course of a few days. A vulnerability scan will be used, among other actions, within a full penetration test to see what a hacker would see.
Both have value. But they’re not interchangeable.
We usually use the cleaning up the house analogy to explain the difference between the two. You need to tidy up your house and want to do it quickly as you have people coming over, so you’ll pick up all of the books and toys off the floor, put them away and everything looks great. That’s a vulnerability assessment.
But with a penetration test you’re not only putting away the books and toys, you’re cleaning behind the sofa, under the fridge, inside the oven, and under beds. You find items that you thought you’d lost, a grand total of £3.50, and some items that could be hazardous lying around.
Key Business Benefits of Penetration Testing
Outside of having to do it because of regulatory requirements, the benefits of penetration testing are technical, but also commercial. Firstly, it helps you prevent breaches. That’s the obvious one. But more importantly, it helps you avoid the cost and disruption that come with them.
According to IBM’s Cost of a Data Breach Report 2025, the average cost of a data breach is $4.4m. While that’s down from 2024, it’s still such a huge amount for businesses of any size to take on.
Secondly, a penetration test will ultimately protect your reputation as customers and partners expect you to take security seriously and you can prove to them that you do. It only takes one incident to undo years of trust.
Thirdly, it gives you clarity. Instead of guessing where your risks are, you get a clear, prioritised view of what actually matters and what needs fixing right now.
So if you’re asking why do I need a pen test, the answer is pretty straightforward. It’s cheaper to find the problem before someone else with less than good intent does.
Meeting Compliance and Winning Business
This is the bit that often gets overlooked.
In many cases, penetration testing isn’t optional. For example, If you process card payments, PCI DSS Requirement 11.3 requires regular penetration testing.
But beyond compliance and regulatory matters, there’s also the commercial angle which comes into play as more companies are looking to do business with others that take their cybersecurity seriously.
More and more businesses are being asked about their security posture as part of the procurement process. If you’re working in a supply chain, especially with larger organisations, you will get asked:
- Have you had a recent pen test?
- Can you show the results?
- What did you fix?
In the UK market, being able to demonstrate this level of due diligence can be the difference between winning and losing a deal.
The different types of Penetration Testing
There six different types of pen test, depending on what it is that you need testing:
- Infrastructure Assessments – this is where we assess servers and networks to identify vulnerabilities
- Web App Assessments – which is where we test websites for vulnerabilities like SQL injection and insecure authentication.
- Cloud Security Reviews – where we assess encryption and access controls to identify security risks.
- Physical Assessments – Which is where we evaluate barriers and surveillance to prevent unauthorised entry to buildings or locations.
- Wireless Assessments – this is where we test Wi-Fi encryption and controls to identify exploitable vulnerabilities.
- Build and Config Reviews – where we examine servers and devices to identify flaws and non-compliant settings.
What does the Penetration Testing process look like?
A typical Penetration Testing process looks like this:
- Scoping
This is where you define what’s being tested. Systems, applications, networks. Nothing happens without this step being nailed down. - Rules of Engagement
This is a formal agreement that sets boundaries. What’s in scope, what’s out of scope, when testing happens, and how far testers are allowed to go. It protects both sides and keeps everything controlled. This is standard practice across the industry and supported by bodies like CREST. - Testing
This is where your tester looks for weaknesses and attempts to exploit them. - Reporting
You get a detailed report outlining what was found, how serious it is, and how to fix it. - Remediation and Retesting
You fix the issues. Then, if needed, they’re tested again to confirm they’ve been properly resolved.
From Vulnerable to Resilient
Penetration testing isn’t a box ticking exercise. It’s a service designed to show all vulnerabilities and the requirements needed to be secure and remain compliant.
A penetration test doesn’t just show you where you’re weak. It gives you a prioritised, actionable roadmap to becoming stronger.
That’s where the real value is.
And if you want to discuss penetration testing for your company, you can get in touch here.