SME security audits cost $1,500–$7,500 depending on scope, with most small businesses paying $2,000–$3,500 for a comprehensive assessment.
The real question isn't whether you can afford an audit — it's whether you can afford the breach that happens without one.
What's Included in a Security Audit
A proper SME security audit covers six critical areas:
| Area | What's Checked | Risk If Skipped |
|---|---|---|
| Infrastructure | DNS, SSL/TLS, headers, CDN configuration | Man-in-the-middle attacks, header injection |
| Email Security | SPF, DKIM, DMARC records | Email spoofing, phishing, domain impersonation |
| Exposed Secrets | API keys, tokens, credentials in code/repo | Full system compromise |
| Subdomain Takeover | Orphaned subdomains with dangling CNAMEs | Complete domain hijacking |
| Third-Party Risk | Dependency vulnerabilities, supply chain | Indirect breaches via trusted services |
| Application | Authentication, authorization, input validation | SQL injection, XSS, privilege escalation |
|------|---------------|----------------|
| Infrastructure | DNS, SSL/TLS, headers, CDN configuration | Man-in-the-middle attacks, header injection |
|---|---|---|
| Exposed Secrets | API keys, tokens, credentials in code/repo | Full system compromise |
| Subdomain Takeover | Orphaned subdomains with dangling CNAMEs | Complete domain hijacking |
| Third-Party Risk | Dependency vulnerabilities, supply chain | Indirect breaches via trusted services |
| Application | Authentication, authorization, input validation | SQL injection, XSS, privilege escalation |
| Email Security | SPF, DKIM, DMARC records | Email spoofing, phishing, domain impersonation |
|---|---|---|
| Subdomain Takeover | Orphaned subdomains with dangling CNAMEs | Complete domain hijacking |
| Third-Party Risk | Dependency vulnerabilities, supply chain | Indirect breaches via trusted services |
| Application | Authentication, authorization, input validation | SQL injection, XSS, privilege escalation |
| Exposed Secrets | API keys, tokens, credentials in code/repo | Full system compromise |
|---|---|---|
| Third-Party Risk | Dependency vulnerabilities, supply chain | Indirect breaches via trusted services |
| Application | Authentication, authorization, input validation | SQL injection, XSS, privilege escalation |
| Subdomain Takeover | Orphaned subdomains with dangling CNAMEs | Complete domain hijacking |
|---|---|---|
| Application | Authentication, authorization, input validation | SQL injection, XSS, privilege escalation |
| Third-Party Risk | Dependency vulnerabilities, supply chain | Indirect breaches via trusted services |
|---|
| Application | Authentication, authorization, input validation | SQL injection, XSS, privilege escalation |
|---|
The Hidden Costs Most Audits Miss
Not all audits are equal. Budget audits often skip:
- Business logic flaws — the vulnerability that lets someone abuse your pricing or access other users' data
- Configuration drift — settings that were secure at deploy but have since changed
- Social engineering vectors — how an attacker would actually get in (spoiler: it's usually not the firewall)
- Compliance gaps — GDPR, HIPAA, SOC 2 requirements that aren't optional in your industry
How to Evaluate If an Audit Is Worth It
Calculate your breach exposure:
1. What's the value of the data you store? (customer PII, payment data, health records)
2. What's the regulatory penalty for a breach? (GDPR: up to €20M or 4% of revenue)
3. What's the reputational cost? (lost customers, negative press, partner trust)
4. What's the remediation cost? (average: $120K–$1.24M for small businesses)
If your breach exposure exceeds 100x the audit cost, the audit is a no-brainer.
Ground Zero LLC's Approach
Our SME Security Audit is $2,500 flat with a 7–10 business day delivery:
- Infrastructure review (DNS, SSL, headers, CDN)
- Email security (SPF, DKIM, DMARC)
- Exposed secrets scan
- Subdomain takeover check
- Third-party dependency risk
- Prioritized fix list with executive summary
No surprises. No scope creep. You know exactly what you're getting before we start.
Frequently Asked Questions
How much does an SME security audit cost?▼
A comprehensive SME security audit costs $1,500–$7,500 depending on scope, with most small businesses paying $2,000–$3,500. At Ground Zero LLC, our SME Security Audit is $2,500 flat with a 7–10 business day delivery.
What does a security audit include?▼
A proper audit covers infrastructure review (DNS, SSL, headers, CDN), email security (SPF, DKIM, DMARC), exposed secrets scan, subdomain takeover check, third-party dependency risk, and a prioritized fix list with executive summary.
How often should I get a security audit?▼
At minimum, annually. But if you're shipping new features, deploying infrastructure changes, or operating in a regulated industry (healthcare, fintech), quarterly audits are recommended.
Can I do a security audit myself?▼
DIY tools catch 30–40% of vulnerabilities. Professional audits catch 85–95%. The gap is where breaches happen. DIY is fine for baseline hygiene; professional audits are essential before launch or compliance certification.
What's the ROI of a security audit?▼
The average cost of a data breach for small businesses is $120,000–$1.24 million. A $2,500 audit that prevents even one vulnerability from being exploited pays for itself 48–496x over.