An IT security audit is the periodic, structured review that tells you whether your security program is actually working — not just whether it exists on paper.
Risk assessments identify what could go wrong. Penetration tests try to make it happen. An IT security audit steps back and asks: is the overall security program functioning as intended? Are controls documented? Are they actually in place? Are they working? Is the organization meeting its compliance obligations? The audit is the evidence-gathering process that answers those questions formally.
The three terms get conflated constantly. They’re distinct:
A risk assessment is a forward-looking process: identify assets, identify threats, score risk, prioritize remediation. It tells you where you’re vulnerable and what to fix.
A penetration test is an adversarial exercise: attempt to exploit vulnerabilities using the techniques real attackers use. It tells you whether specific defenses hold up under real attack conditions.
An IT security audit is an evidence-based review: examine controls, compare against a standard or framework, document findings, produce a report. It tells you whether your security program meets the requirements it’s supposed to meet and can be demonstrated to do so.
All three serve different purposes. A mature security program uses all three. Which ones are required — and when — depends on your regulatory obligations, your cyber insurance requirements, and what your clients or business partners expect. For more on risk assessments specifically, see What is a compliance risk assessment?
Access controls. Who has access to what? Are access rights appropriate to job functions? Are there accounts for departed employees still active? Are privileged accounts — those with administrator rights — limited to the people who genuinely need them? Are access changes logged and reviewable? The auditor looks at actual configuration, not policy documents.
Authentication. Is MFA enforced across all accounts, or just some? Are password policies configured and enforced, or merely documented? Is SSO in use for centralized identity management?
Endpoint security. Is EDR deployed on every managed device? Are devices enrolled in MDM? Is encryption enabled? Are patches current? The auditor typically pulls device inventory data from the RMM platform and reviews it against the asset inventory.
Network security. Is the firewall configured appropriately for the organization’s size and risk profile? Are firmware versions current? Is network segmentation in place where required (guest WiFi separate from production, payment systems isolated, healthcare workstations segregated)? Are logs being captured and retained?
Data protection. Where is sensitive data stored? Is it encrypted at rest and in transit? Is it backed up? Are backups isolated and tested? Is data retention appropriate for regulatory requirements?
Vendor management. Is there a documented list of technology vendors? Have their security practices been evaluated? Are appropriate agreements (BAAs, data processing agreements) in place? Are vendor access credentials managed and restricted?
Policy and documentation. Do written information security policies exist? Do they reflect actual practice? Are they current? Are employees trained on them and is that training documented?
Incident response. Does an incident response plan exist? Has it been tested? Does the organization know how to invoke it? Is there evidence of prior testing?
IT security audits can be conducted internally (by the organization’s own IT team or compliance staff) or externally (by an independent third party). Compliance frameworks typically distinguish between the two: HIPAA requires both internal and external evaluations at appropriate intervals. SOC 2 requires independent third-party audits to produce a reportable opinion. PCI-DSS has specific requirements around qualified security assessors for certain merchant levels.
For most small and mid-sized businesses, an annual internal audit conducted by the managed IT provider — with periodic independent third-party audits for frameworks that require them — is the appropriate cadence. More frequent reviews are warranted after significant environmental changes: new systems, new locations, significant personnel changes, or a security incident.
A security audit produces a written report with findings organized by category and severity, evidence supporting each finding, comparison to the applicable framework or standard, recommendations for remediation, and a management response section where the organization documents its planned remediation. The report is a compliance artifact — it demonstrates that the review happened, what was found, and what is being done about it.
Critically: the findings don’t have to be perfect for the audit to be valuable. An audit that finds gaps and documents a remediation plan is substantially better than no audit at all — it shows the organization is taking a systematic approach to identifying and addressing issues.
NerdSquad conducts IT security audits for managed IT clients as part of their annual compliance program — reviewing the full control environment against applicable frameworks, documenting findings, and driving remediation. For clients with regulatory requirements that need independent third-party audits, we scope and coordinate those engagements through vetted specialists.
For the broader compliance picture, see What is digital compliance? and Can you help us meet compliance requirements like HIPAA, PCI, and SOC 2?