The term "security audit" gets thrown around a lot, usually by people trying to sell you something expensive. As an Australian small business owner, you've probably been told you need one. Maybe several. Choosing the right type for your business can be confusing, as not every audit is necessary for every owner.
The ACSC recorded 87,400 cybercrime reports in 2023-24. That's one every six minutes. Small businesses now average $56,600 per incident according to the latest ASD report. Those numbers are real, and they're growing. But the answer isn't necessarily a $50,000 audit. Sometimes the best phishing test software Australia has available will do more for your security than a fancy compliance certificate.
The 9 Types of Security Audits (and What They Actually Do)
1. Compliance Audits
A compliance audit checks whether you're meeting specific legal or regulatory requirements. For Australian businesses, this usually means the Privacy Act 1988 and the Notifiable Data Breaches scheme.
Who needs this: Businesses handling personal information (which is most of us), healthcare providers, financial services, and anyone working with government contracts.
What it costs: $5,000 to $30,000 depending on your size and the standard being assessed.
2. Vulnerability Assessments
This is an automated scan of your systems looking for known security holes. Think of it like a building inspector checking for obvious structural problems before looking at the wiring.
Who needs this: Any business with a website, cloud systems, or a network. The good news is basic vulnerability scanning is often included in managed IT services.
What it costs: $500 to $5,000 for a standalone assessment.
3. Penetration Testing
A penetration test (or "pen test") is where someone actually tries to break into your systems. They're looking for weaknesses that automated scans miss. A skilled tester thinks like an attacker.
Who needs this: Businesses with customer-facing web applications, e-commerce sites, or sensitive data. Also required for some government contracts and is strongly recommended for ISO 27001 certification.
What it costs: $3,000 to $50,000 depending on scope.
4. Social Engineering Audits
This tests your people, not your technology. Auditors might call your staff pretending to be IT support, send phishing emails, or even try to walk into your office with a fake ID badge.
Who needs this: Everyone. Your staff are your biggest security variable. According to research on phishing training effectiveness, regular testing significantly reduces click rates over time.
What it costs: $2,000 to $15,000 for a full social engineering project. Or as little as A$19 per month for ongoing automated phishing simulations.
5. Cloud Security Audits
If you use Microsoft 365, Google Workspace, AWS, or any cloud services (you probably do), a cloud security audit checks whether they're configured correctly. Default settings are rarely secure settings.
Who needs this: Any business using cloud services. Which in 2026 means almost everyone.
What it costs: $2,000 to $20,000 depending on how complex your systems are.
6. Configuration Audits
This examines how your systems are set up against best practices. Are your firewalls configured properly? Are default passwords changed? Is unnecessary software disabled?
Who needs this: Businesses with on-premises servers, custom software, or complex networks. Less relevant if you're fully cloud-based.
What it costs: $1,500 to $10,000.
7. Risk Assessments
A risk assessment looks at what could go wrong, how likely it is, and what the impact would be. It's less technical than other audits and more about business planning.
Who needs this: Every business should do some form of risk assessment. It helps you prioritise where to spend your security budget.
What it costs: $2,000 to $15,000 for a formal assessment. Free if you do a basic version yourself.
8. Internal Audits
Your own staff (or an internal audit team) review security controls. This is ongoing monitoring rather than a point-in-time check.
Who needs this: Larger businesses with compliance requirements. Small businesses can do informal versions by regularly reviewing who has access to what.
What it costs: Staff time, or $5,000+ if you hire external help to set up the process.
9. External Audits
An independent third party examines your security setup. This is what insurers, enterprise clients, and regulators typically want to see.
Who needs this: Businesses seeking cyber insurance, government contracts, or enterprise clients with security requirements.
What it costs: $10,000 to $100,000+ depending on scope and certifications required.
Where Email Security Testing Fits In
Most security breaches start with email. A fake invoice. A password reset request that isn't real. A "shared document" that installs malware. Your technical controls might be perfect, but if someone in accounts clicks the wrong link, none of that matters.
This is why cyber security training for small business often delivers better returns than expensive technical audits. A hospital phishing simulation study found that regular testing dramatically reduced the risk of successful attacks over time.
Email security testing falls under social engineering audits, but you don't need to hire a consultant for $15,000. Automated phishing simulation platforms let you test your staff regularly for a fraction of the cost. The best ones adapt difficulty based on how each person performs and automatically provide training to anyone who fails.
What Most Australian Small Businesses Actually Need
Here's a practical starting point based on business size:
- Under 10 employees: Regular phishing simulations, basic vulnerability scanning (often included with managed IT), and an informal risk assessment.
- 10-50 employees: Add a formal risk assessment, cloud security review, and consider penetration testing if you have customer-facing systems.
- 50+ employees: Full compliance audit that fits your industry requirements, annual penetration testing, and documented internal audit processes.
The ASD Essential Eight is increasingly required by insurers and enterprise supply chains. Even if you're not required to comply, it's a sensible checklist for any business. One of the eight controls is user application hardening, but the real gap for most small businesses is the human element.
Getting Started Without the Big Price Tag
You don't need to spend $50,000 to improve your security level. Start with what matters most: your people.
Phishing Training Australia is free for up to 15 staff, which lets you send yourself a test phishing email. It takes about two minutes to set up, no IT skills required. You'll see exactly how the simulation works before rolling it out to your team.
The platform handles everything automatically. Add your staff, choose how often you want tests sent, and the system does the rest. It tracks who clicks, provides training to those who need it, and adjusts difficulty over time. Monthly reports show you how your team is improving.
Free for up to 15 staff, or A$19 per month for up to 25, you get ongoing protection that addresses the most common method of attack. That's less than the cost of a single hour of consultant time, running continuously.
See how your team handles a phishing attempt by sending yourself a test email. Start free and experience the simulation for yourself. You might be surprised what slips through.
