Quick Answer
An IT security audit in the UK costs between £2,000 and £15,000 in 2026, depending on scope, business size and audit type. A basic vulnerability assessment for a 20-person office starts at £2,000–£3,500. A full penetration test with compliance reporting costs £5,000–£15,000.
The audit typically takes 2–4 weeks from scoping to final report. Connection Technologies includes annual security reviews as part of managed IT packages, with full penetration testing available as an add-on.
Last updated: March 2026 | Reviewed by: Connection Technologies team
Direct Answer: £2,000-£15,000
Cyber security is no longer optional for UK businesses of any size. In 2026, the average cost of a data breach for a UK SME is £15,300 (DCMS Cyber Security Breaches Survey), and 39% of UK businesses reported a cyber attack in the past 12 months.
The good news: effective protection does not have to be complicated or expensive. A layered approach combining endpoint protection, email security, staff training and regular audits stops most attacks.
Connection Technologies builds security into every managed IT package, providing multi-layered protection from £45/user/month — no bolt-ons, no hidden security charges.
What a Security Audit Covers
A complete it security audit for UK businesses covers multiple layers of protection:
Endpoint protection — next-generation antivirus and EDR (Endpoint Detection and Response) on every device, including laptops, desktops and mobile devices. This goes beyond traditional antivirus to detect behavioural anomalies and zero-day threats.
Email security — advanced filtering to block phishing, malware, business email compromise (BEC) and spam before it reaches your inbox. Email remains the number one attack vector for UK businesses.
Network security — firewall management, intrusion detection/prevention, DNS filtering and network segmentation to protect your internal systems from external threats.
Security awareness training — regular phishing simulations and training modules to educate staff about current threats. Human error causes over 80% of data breaches, making training one of the most cost-effective security investments.
Vulnerability management — regular scanning and patching of systems, applications and firmware to close security gaps before attackers can exploit them.
Connection Technologies bundles all of these services into managed IT packages from £45/user/month, with no separate security charges.
Need help with this? Connection Technologies offers a free technology assessment for UK businesses. Book your free consultation or call 0330 440 4247.
Types of Audit Compared
Cyber security is a critical concern for every UK business in 2026, regardless of size or industry. The threat landscape continues to evolve, with ransomware, phishing, business email compromise and supply chain attacks becoming more sophisticated and more targeted at SMEs.
The statistics are sobering: 39% of UK businesses reported a cyber attack in the past 12 months (DCMS Cyber Security Breaches Survey 2025).
The average cost of a breach for an SME is £15,300, but for businesses that suffer ransomware, the figure can reach six figures when you factor in downtime, data recovery, regulatory fines and reputational damage.
Small and medium businesses are increasingly targeted precisely because attackers know they often have weaker defences.
The days when cyber criminals only went after big corporations are long gone — automated attack tools now scan millions of businesses simultaneously, exploiting any vulnerability they find.
Effective protection follows well-established principles:
- Defence in depth — multiple layers so no single failure is catastrophic
- Least privilege — users only access what they need
- Regular patching — keep all software current
- Employee training — build security awareness
- Backup and recovery — tested plans for the worst
The most important decision is choosing a provider that builds security into the foundation of your IT, not one that bolts it on as an expensive add-on.
If your IT provider charges extra for endpoint protection, email filtering or patch management, they are treating security as a profit centre rather than a fundamental responsibility.
Connection Technologies builds these principles into every managed IT package, providing multi-layered cyber security from £45/user/month with no separate security charges or bolt-on fees.
We include endpoint protection, email security, monitoring, patch management and security awareness training as standard.
Step-by-Step Process
Here is a step-by-step guide to the typical it security audit process:
Step 1: Discovery and audit — your provider should conduct a thorough audit of your current setup, including infrastructure, software, security posture and pain points. This typically takes 1–2 weeks and should be free of charge.
Step 2: Solution design — based on the audit, your provider designs a solution tailored to your business needs, size and budget. This should include a detailed service specification, pricing breakdown and implementation timeline.
Step 3: Agreement and planning — once you approve the solution, your provider creates a detailed implementation plan with milestones, responsibilities and a communication schedule. This is also when contracts are signed.
Step 4: Implementation — the actual migration or setup, typically conducted in phases to minimise disruption. Critical systems are migrated during off-peak hours, and your provider should have a rollback plan for every change.
Step 5: Testing and handover — thorough testing of all systems before going live, followed by user training and documentation. Your provider should be available for intensive support during the first 2–4 weeks.
Step 6: Ongoing management — regular service reviews (monthly or quarterly), proactive monitoring, continuous improvement and strategic planning. This is where the real value of a managed service becomes apparent.
Connection Technologies follows this exact process for every new client, with a named project manager overseeing the transition and a named account manager for ongoing support.
How to Prepare
Use this six-step checklist before audit day:
- Inventory all IT assets — devices, accounts, cloud services, suppliers.
- Gather existing policies and documentation. Auditors will ask for these first.
- Confirm MFA is on for every admin and email account.
- Verify all devices are encrypted and patched. Run a patch report the day before.
- Test your backups by doing an actual restore, not just checking the dashboard.
- Brief leadership on the audit scope and the questions they will be asked.
Most audits stall at the documentation step. Prep this ahead and you save days of fieldwork.
What Happens After the Audit
You receive a written report listing every finding with a severity rating and recommended remediation. From here the work splits into three streams:
- Quick wins — MFA gaps, missing patches, unused admin accounts. Fix in week one.
- Project items — EDR rollout, MDM coverage, backup overhaul. Plan into the next quarter.
- Strategic changes — identity architecture, supplier onboarding, incident response. Twelve-month roadmap.
Most insurers and certification bodies expect a 30–90 day remediation window before re-testing. Failure does not normally lead to immediate consequences. It does, however, block certification renewals, can breach customer or insurer contracts, and raises your breach risk in the meantime.
We help clients triage findings, fix the easy wins fast, and build a 12-month roadmap for the bigger items so the next annual audit is a confirmation rather than a fresh start.
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Frequently Asked Questions
What is an IT security audit and why does my business need one?
An IT security audit is a structured review of your technology, processes and people against a recognised security framework (Cyber Essentials, ISO 27001, NIST CSF, NCSC 10 Steps). It identifies vulnerabilities, gaps in controls, and opportunities to strengthen defences. UK businesses need audits to meet customer/insurance requirements, qualify for certain contracts (especially government and finance), satisfy regulators (ICO, FCA), and reduce the risk of breach. Most cyber insurers now require an audit annually for renewals.
How much does an IT security audit cost in the UK in 2026?
Typical UK IT security audit costs in 2026:
- Cyber Essentials self-assessment — £300–£500 DIY, or £800–£1,500 with consultant support.
- Cyber Essentials Plus (with hands-on testing) — £1,500–£3,500 depending on environment size.
- ISO 27001 audit (Stage 1 + Stage 2) — £6,000–£15,000.
- Full security posture assessment — £3,000–£10,000.
- Penetration testing on top — £3,000–£10,000 per engagement.
Costs vary greatly with environment complexity and remediation scope.
What does an IT security audit cover?
A complete audit covers:
- Identity and access — MFA, password policy, leaver process.
- Endpoint security — EDR/MDM coverage, encryption, patching.
- Network security — firewalls, segmentation, VPN.
- Email security — spam, phishing, DMARC.
- Backup and recovery — RTO/RPO, immutability.
- Incident response readiness, supplier risk, physical security, and policy/governance documentation.
Each area is benchmarked against the chosen framework and gaps are prioritised.
How do I prepare my business for a security audit?
The six-step prep checklist:
- Inventory all IT assets — devices, accounts, cloud services, suppliers.
- Gather existing policies and documentation.
- Confirm MFA is on for all admin and email accounts.
- Verify all devices are encrypted and patched.
- Test your backups by doing an actual restore.
- Brief leadership on the audit scope and what they will be asked.
Most audits fail at the documentation step. Prep that ahead and you save days of fieldwork.
How long does an IT security audit take?
Cyber Essentials self-assessment: 1–2 weeks of effort. Cyber Essentials Plus: 2–4 weeks including hands-on testing. ISO 27001: 3–6 months for first certification, including the gap analysis and remediation phase.
Full security posture assessment: 4–8 weeks. The actual audit fieldwork is usually 2–5 days of consultant time; the rest is preparation, evidence gathering and remediation.
What happens if my business fails an IT security audit?
You receive a list of findings with severity ratings and recommended remediation. You then have a remediation window (typically 30–90 days) to fix issues and re-test. Failure does not normally lead to immediate consequences but does block certifications, may breach customer/insurer contracts, and increases breach risk. We help our clients triage findings, fix the easy wins fast, and build a 12-month roadmap for the bigger items.
Do I need an IT security audit for cyber insurance?
Increasingly yes. Most UK cyber insurers in 2026 require evidence of basic security controls before issuing or renewing a policy.
Common minimum requirements:
- MFA on all email and remote access.
- Endpoint detection and response (EDR).
- Regular patching.
- Immutable backups.
- Incident response plan.
- Security awareness training.
Cyber Essentials certification meets most insurer requirements. Without these controls, premiums double or coverage is refused.
Should I do an IT security audit annually?
Yes. Most frameworks (Cyber Essentials, ISO 27001) require annual recertification, and most cyber insurers require annual review.
Beyond compliance, an annual audit catches drift: new SaaS apps adopted by departments, leavers whose accounts were never disabled, devices that fell out of MDM, and third-party suppliers added without review. Annual audit plus quarterly internal review is the gold standard for SME security hygiene.
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