IT Audit: What It Is and What It Should Include

In the Mexican market, “IT audit” and “computer audit” refer to the same service—but many companies search using one term or the other, and not all providers appear in both searches. Here is the complete definition, regardless of what your team calls it.

What exactly is an IT audit?

It is a systematic review of a company’s IT systems, processes, and controls—including production servers, databases, domain controllers, endpoints, networks, and security configurations—with the goal of identifying risks, compliance gaps, and opportunities for improvement before they turn into incidents.

What It Should Include — The Actual Scope

A thorough IT audit covers, at a minimum:

• Infrastructure: servers, databases, networks and segmentation, firewall configurations
• Security and Access: privilege management and administrative accounts, MFA on critical accounts, authentication logs
• Patches and Configuration: Critical Patch Application Deadlines, System Hardening, Unauthorized Software
• Backup and Continuity: Restoration Tests (Not Just Copying), Minimum Retention, RTO/RPO Validation
• Licensing and Inventory: Software Licenses and Versions, Contract Compliance, Hardware Assets
• Documentation: policies, procedures, change history

The deliverable is not a list of issues: it is a report with findings categorized by severity and a remediation plan with deadlines—which we explore in detail through 15 typical findings from an IT audit of subsidiaries.

How to Do It: The 4-Step Process

1. Inventory — the starting point for any serious audit: what hardware, software, and access points actually exist, not what the diagram from two years ago shows. 2. Technical review — analysis of configurations, vulnerability testing, log review. 3. Interviews and validation — cross-checking the technical findings with how the team actually works. 4. Report and plan — findings prioritized by severity, with realistic remediation deadlines.

When Should You Conduct an IT Audit?

Four typical scenarios: on an annual basis as a preventive measure; before a major compliance event (certification, due diligence, group audit); when opening or restructuring a subsidiary in Mexico; and after any security incident, to verify that no similar vulnerabilities remain unaddressed.

For a subsidiary of an international group, an IT audit is usually conducted for a specific reason: the parent company requires it as part of its own compliance efforts (SOX, ISO 27001, GDPR if European data is involved). A report in the format expected by a European parent company—rather than just a local checklist—saves weeks of back-and-forth communication.

Keptos Conducts comprehensive IT audits for companies and subsidiaries in Mexico. See details about the service under " IT Audits for Companies in Mexico."