How a security audit differs from an IT audit
An IT audit checks how a company's infrastructure works: which systems are in use, whether they are up to date, and whether documentation matches reality. A security audit goes a step further and answers a different question: could someone unauthorised get into the company's data or damage it. It checks security configuration, access permissions, backups, and traces of earlier intrusion attempts. Some companies order both audits together, since the results of one often explain gaps found in the other.
When a security audit makes sense
The decision is usually triggered by a specific situation rather than the simple passage of time:
- the company changed its IT provider or moved to new infrastructure and no one checked whether the configuration is secure;
- the number of employees and vendors with access to systems has grown and permissions have not been reviewed in a long time;
- an incident occurred, for example a phishing attempt or a suspicious login, and it needs to be confirmed whether a breach took place;
- a client or business partner asks about the company's security before signing a contract.
How a security audit works step by step
The details vary between providers, but most audits follow the same stages.
- Defining the scope. Which systems, locations and processes will be checked, and what risk is acceptable during testing, for example whether production can be tested during business hours.
- Reviewing configuration and permissions. Checking who has access to what, whether accounts are deactivated after an employee leaves, and whether backups actually work.
- Technical testing. Attempting to find real weaknesses in systems and applications, usually in an agreed time window and without interrupting the company's work.
- Analysing the results. Assessing which findings are urgent and which can wait for the next maintenance window.
- Report and recommendations. Describing the findings in plain language, with priorities and proposed actions, not just a list of technical issues.
What determines the duration and scope of an audit
Every company has different infrastructure, so the duration of an audit depends on several factors: the number of systems and locations covered, whether it is a first audit or a repeat one, since repeats are usually faster, and the availability of documentation and a person on the company's side who knows the infrastructure. A provider should give a quote only after the scope has been defined, not before discussing what exactly will be checked.
What to look for when choosing a provider
A good audit ends with a report that can actually be used, not just a list of warnings copied from a scanning tool. It is worth asking a provider what a sample report looks like, whether a follow-up call explaining the results is included, and whether the company also helps implement the recommendations or ends its involvement at the report.
Summary
A security audit is not a one-off formality. It checks whether what a company believes is protected actually is. It delivers the most value when it ends not only with a report, but also with a clear plan for what to do next. A company that has never gone through such an audit before usually ends up learning more about its own infrastructure than it expected, including how many accounts and vendor integrations were forgotten along the way.