How Much Does a Cyber Security Audit Cost in Australia? (2026)

Why security audit pricing varies so much

Search for "cyber security audit Australia" and you will find quotes ranging from a few hundred dollars for an automated scan to $50,000 or more for an enterprise engagement. For a small business owner, this range is useless. It tells you nothing about what you actually need or what you should pay for it.

The variation exists because "security audit" covers fundamentally different things depending on your business size, industry, and risk profile. An audit for a 500-person financial services firm with complex infrastructure is not the same product as an audit for a 15-person professional services business running Microsoft 365.

This guide focuses on what small businesses — typically 5–100 staff, using cloud services like Microsoft 365 and Azure — should expect to pay, what is included at each price point, and what to watch out for.

What types of security audit exist for small businesses?

Essential Eight gap analysis

The ACSC Essential Eight is the Australian government's recommended baseline security framework. An Essential Eight audit assesses your current posture against the eight controls across three maturity levels and produces a gap report with remediation priorities.

This is the right starting point for most Australian small businesses. It is framework-aligned, widely recognised by insurers and government procurement, and directly actionable. A quality Essential Eight audit for a small business environment costs between $900 and $1,500.

Cloud security configuration review

A review of your Microsoft 365, Azure, or AWS configuration against security baselines — checking for misconfigurations, excessive permissions, legacy authentication, weak email security settings, and backup gaps. Often bundled with an Essential Eight audit. Adds $300–$600 to the base price for a small business environment.

Penetration test

A penetration test actively attempts to exploit vulnerabilities in your systems to see how far an attacker could get. This is a different product from a configuration audit — more expensive, more disruptive, and more appropriate for businesses that have already addressed basic configuration hygiene.

For most small businesses, a configuration audit is the right starting point. There is limited value in testing how exploitable your gaps are before you close them. Penetration tests for small business environments typically start at $3,000–$5,000.

Compliance-specific audit

If you need audit output for a specific framework — ISO 27001, PCI DSS, SOC 2, or government-specific requirements — the scope and cost increase accordingly. These are specialist engagements that go beyond the Essential Eight and typically cost $5,000–$20,000+ depending on framework and organisational complexity.

What does a $900 Essential Eight audit get you?

A well-structured Essential Eight audit at this price point should include all of the following for a business of up to around 50 staff running Microsoft 365 and Azure:

• Review of all eight controls against your current environment
• Maturity level scoring for each control (ML0–ML3)
• Risk register with findings rated Critical, High, Medium, and Low
• Prioritised remediation plan with specific actions for each finding
• Optional mapping to ISO 27001, NIST CSF, ASD ISM, or CIS Controls
• Written report suitable for cyber insurance applications, client due diligence, or government tender pre-qualification
• 30-minute debrief and Q&A session

What it does not include at this price: active penetration testing, social engineering assessment, physical security review, or compliance certification. Those are separate engagements with different scope and significantly higher costs.

What drives the cost up?

Business size and infrastructure complexity

The scope of review increases with the number of users, devices, cloud services, and custom configurations. A 10-person business with standard Microsoft 365 is simpler to assess than a 100-person business with hybrid infrastructure, multiple Azure subscriptions, and custom applications. Expect the price to scale accordingly — typically $1,500–$3,000 for 50–150 staff.

Regulated industries

If you operate in financial services, healthcare, or legal, your audit scope may need to include industry-specific requirements — APRA CPS 234, the Privacy Act, or sector-specific guidelines. These add scope, time, and cost. Expect a 30–50% premium over base pricing for regulated industry engagements.

Remediation included

Some providers bundle audit and remediation together. This is efficient — the person who identifies the problem also fixes it — but the combined price will naturally be higher. Expect to pay $1,900–$2,800 for an audit plus M365 hardening, and $2,800–$4,000 for audit plus full remediation including Azure.

Certification requirements

If you need a formal certification or attestation letter — for a government contract or enterprise supply chain requirement — the engagement needs to follow specific methodologies and produce specific documentation. This adds cost. Standard audits produce a risk report; certification audits produce a compliant attestation. Get clear on which you actually need before committing.

What does a cyber security audit cost compared to not having one?

The ACSC reports the average cost of a cyber security incident for an Australian SME at $46,797. This covers direct financial loss, incident response, recovery costs, regulatory notification, and operational disruption. It does not account for reputational damage or lost business.

For a business with 20 staff, a $900 audit that identifies and closes three critical misconfigurations — legacy authentication enabled, admin accounts without MFA, unsecured external SharePoint sharing — is not a cost. It is a straightforward risk reduction investment with a clear return.

Cyber insurance claims are also increasingly being contested where insurers determine that the business lacked adequate controls. A documented audit with a remediation plan strengthens your insurance position and may reduce your premium.

How to get value from a security audit

The audit itself is not the outcome — the remediation is. A risk report that sits in a folder delivers no security value. Before commissioning an audit, be clear on what you will do with the findings. Either plan to implement the remediation plan yourself, or engage the same provider to do it, or hand it to your MSP or IT team with a clear brief and timeline.

The most common waste in security audit spending is paying for a report that identifies the same problems year after year without action. A $900 audit followed by $1,200 in remediation delivers more security value than a $2,000 audit followed by inaction.

Frequently asked questions

How much does a cyber security audit cost in Australia?

For small businesses, an Essential Eight gap analysis typically costs between $900 and $2,500 depending on scope and business size. Penetration tests start at $3,000–$5,000 for a small environment. Enterprise-scale audits and compliance certifications cost significantly more.

What is included in a cyber security audit?

A standard small business security audit includes a review of your cloud configuration (M365 and Azure), identity and access management, device and endpoint posture, email security, and backup configuration. You receive a written risk report with a prioritised remediation plan and a maturity level score for each Essential Eight control.

How long does a cyber security audit take?

For most small businesses, the assessment takes 2–3 business days from initial access to final report delivery. The business continues operating normally during the assessment — it is non-disruptive remote configuration review, not active testing.

Do I need a penetration test or a security audit?

For most small businesses that have not yet done a formal security review, a configuration audit is the right starting point. Close the known gaps first. A penetration test is appropriate once you have addressed basic configuration hygiene and want to test the resilience of what remains — or if a client or insurer specifically requires it.

Can a security audit help with cyber insurance?

Yes. A formal Essential Eight audit with a written report and maturity level scoring is accepted by most Australian cyber insurers as evidence of security controls. Some insurers offer premium reductions for businesses that can demonstrate Essential Eight compliance. The report is also useful for client due diligence and government tender pre-qualification.