Most firms believe their systems are secure. An IT security audit is what turns that belief into evidence — an independent, structured check that the technology your firm runs on is actually controlled, and that you can prove it. For an Isle of Man regulated firm, that evidence is not a nice-to-have: it is what stands behind your Technology Risk Assessment, your systems-and-controls obligations, and the answer you give when a supervisor asks how you know your environment is sound.

It helps to be clear about the term. An "IT audit" in the wider world often means a career path or a financial-systems review. What a regulated firm needs is narrower and more practical: an IT security audit — an assessment of whether the controls protecting your systems and data are designed well and actually working.

What an IT security audit actually covers

A good IT security audit is not a vulnerability scan or a box-ticking checklist. It examines the controls that determine whether your environment is genuinely defensible, typically across:

• Access control — who can get into which systems, whether access is least-privilege, how leavers are removed, and whether privileged accounts are controlled.
• Change management — whether changes to systems are assessed, authorised and recorded, rather than made on the fly.
• Backups, recovery and continuity — whether your data is backed up, whether restores are actually tested, and whether you could recover a critical system in a realistic timeframe.
• Network and endpoint security — patching, malware protection, segmentation, and the basics that frameworks like the NCSC's Cyber Essentials were built around.
• Third-party and outsourced systems — the controls (and assurance) around the suppliers running systems on your behalf, where the risk remains yours.
• Logging, monitoring and data integrity — whether you would actually detect a problem, and whether the data your compliance and reporting depend on can be trusted.

Recognised frameworks — the NIST Cybersecurity Framework (identify, protect, detect, respond, recover) and ISO/IEC 27001 — give the audit a consistent backbone, so the findings are structured and comparable year on year rather than one person's opinion.

Why a regulated Isle of Man firm needs one

The Isle of Man framework already expects this, even if it doesn't use the phrase "IT security audit". The Financial Services Rule Book 2016 requires effective systems and controls (rule 8.27) and an internal-audit capability (rule 8.34) — and the FSA's Supervisory Priorities 2025–2027 single out internal audit as a key component of good governance, alongside a clear focus on cyber. The FSA's own cyber-security guidance sets the expectation that firms understand and manage their technology risk, not assume it away.

There is also the direct compliance link. The AML/CFT Handbook requires a Technology Risk Assessment of the systems you rely on. An IT security audit is what gives that assessment teeth: instead of asserting that your controls are adequate, you can point to an independent review that tested them. It is the same principle as a defensible business risk assessment — evidence beats assertion. And it is the practical counterpart to strong IT governance: governance sets the expectation, the audit checks reality against it.

Internal, external, and how often

Smaller firms rarely have the in-house independence to audit their own IT credibly — the people who run the systems cannot objectively assess them, which is precisely the gap rule 8.34 and the FSA's internal-audit focus are getting at. An independent IT security audit, scoped to the firm's size and risk, fills that gap. As a rule of thumb it should be done at least annually, after any material change to your systems or suppliers, and whenever your Technology Risk Assessment or operational resilience work flags an area that needs assurance.

Knight provides independent IT security audits for Isle of Man regulated firms — scoped to your environment, mapped to the Rule Book and your AML/CFT Technology Risk Assessment, and delivered as clear, prioritised findings your board can act on.

Frequently asked questions

What's the difference between an IT audit and an IT security audit?

In a regulated-firm context, an IT security audit focuses specifically on whether the controls protecting your systems and data are well designed and working — access, change, backups, third parties, monitoring. It is narrower and more practical than a generic "IT audit", and it produces the assurance your Technology Risk Assessment and systems-and-controls obligations need.

Does the Isle of Man FSA require an IT security audit?

Not by that name, but the expectation is built in. The Financial Services Rule Book 2016 requires effective systems and controls (8.27) and internal audit (8.34); the FSA's 2025–2027 supervisory priorities highlight internal audit and cyber; and the AML/CFT Handbook requires a Technology Risk Assessment. An independent IT security audit is the most credible way to evidence all three.

How often should we have one?

At least annually, and additionally after any material change to your systems or key suppliers, or where your Technology Risk Assessment or operational-resilience work identifies an area needing independent assurance.