If your organisation has achieved Cyber Essentials Plus, congratulations, you've taken an important step towards demonstrating your commitment to cybersecurity. But if you're now considering ISO 27001, you're probably asking the same question many organisations do: How big is the gap between the two?

The short answer? It's far more than a few additional controls. Moving to ISO 27001 represents a significant step up in the maturity of your organisation's approach to information security.

A Change in Mindset

The first thing to understand is that transitioning to ISO 27001 requires a fundamental shift in how you think about information security.

Cyber Essentials Plus focuses primarily on technical controls. It asks questions such as: Are your systems configured securely? Are vulnerabilities patched? Are firewalls correctly implemented? These controls are essential for protecting against common cyber threats, and Cyber Essentials Plus provides independent assurance that they are in place.

ISO 27001 takes a much broader approach. Rather than simply asking what security controls exist, it also examines why they exist, how they are managed, who is responsible for them, and how they are continually reviewed and improved.

In other words, ISO 27001 is about much more than technology, it's about governance, risk management and embedding a culture of information security throughout the organisation.

Where Are the Biggest Gaps?

Below are five of the biggest differences organisations encounter when progressing from Cyber Essentials Plus to ISO 27001.

1. Risk Management

One of the most significant differences is the emphasis placed on risk.

Cyber Essentials Plus focuses on implementing a defined set of technical controls to defend against common cyber threats. It does not require organisations to carry out formal information security risk assessments.

ISO 27001 is fundamentally risk-based. Every security control should be selected because it addresses an identified business risk. Organisations are expected to identify information assets, assess threats and vulnerabilities, evaluate risk, and document how those risks will be treated and monitored.

2. Policies and Documentation

Documentation is another area where expectations increase significantly.

Cyber Essentials Plus requires relatively little formal documentation. ISO 27001, however, requires organisations to establish and maintain a comprehensive Information Security Management System (ISMS).

This includes documented policies, procedures, risk assessments, defined roles and responsibilities, asset inventories, incident response processes and business continuity arrangements.

The emphasis shifts from proving that controls exist to demonstrating that information security is managed consistently across the organisation.

3. Organisation-Wide Involvement

Cyber Essentials Plus is often led by the IT team, with support from an external assessor where required.

ISO 27001 requires engagement across the entire business. Senior leadership must actively support the ISMS, employees must receive regular security awareness training, and departments such as HR, Legal and Operations all have important roles in maintaining compliance.

Information security becomes a business responsibility rather than simply an IT function.

4. Audit Depth

The certification process is also considerably more comprehensive.

Cyber Essentials Plus involves a technical verification that your security controls have been implemented correctly.

ISO 27001 certification is carried out in two stages. The first reviews your documentation and readiness for certification, while the second assesses how effectively your ISMS operates in practice. Auditors will expect to see evidence that your policies are embedded into day-to-day business activities—not simply documented.

5. Continual Improvement

Perhaps the biggest change is recognising that ISO 27001 is an ongoing management system rather than an annual certification exercise.

Cyber Essentials Plus provides an annual assessment against a defined security baseline.

ISO 27001 requires continual monitoring, internal audits, management reviews and regular improvement of your ISMS. Organisations must demonstrate that they are continually identifying opportunities to strengthen their information security management practices.

Conclusion

Moving from Cyber Essentials Plus to ISO 27001 is more than an incremental step, it represents a significant advancement in how your organisation manages information security.

While Cyber Essentials Plus demonstrates that strong technical controls are in place, ISO 27001 shows customers, partners and regulators that information security is embedded throughout your organisation. It strengthens trust, supports regulatory compliance, improves risk management and provides a scalable framework for continual improvement.

For organisations looking to demonstrate security leadership rather than basic compliance, ISO 27001 is the natural next step.

At Intrepid, we help organisations bridge the gap between Cyber Essentials Plus and ISO 27001. Whether you need a gap assessment, support designing your Information Security Management System, or guidance through certification, our security specialists can help every step of the way.

If you’d like to hear more about Intrepid’s Security and Technology offerings, please contact us at sales@beintrepid.co.uk to set up a free consultation and Q&A session about potential security frameworks you’d like to pursue.