Maturity Assessment vs Audit: What's the Difference?

When someone suggests "having a look at how well we do X", two very different exercises come to mind. One is an audit: an independent check of whether controls and processes meet a defined standard. The other is a maturity assessment: a structured look at how well developed a capability is, and what the next stage of improvement looks like.

They overlap, and they can complement each other. But they ask different questions, use different methods and produce different outputs. Using the wrong one leads to predictable disappointment: an audit report that says little about how to improve, or a maturity score that gives a regulator no assurance at all.

The short version

• An audit asks: "Does this meet the required standard, and is it working as intended?"
• A maturity assessment asks: "How well developed is this capability, and what would better look like?"

An audit gives assurance. A maturity assessment gives direction.

Purpose

Audits exist to provide independent assurance to someone, usually a board, an audit committee, a regulator or a customer, that risks are being managed and controls are effective. The audience is often outside the team being audited.

Maturity assessments exist to help an organisation understand where it stands and decide what to improve. The audience is usually the team or leadership responsible for the capability.

Independence

Audits rely on independence. Internal auditors report to an audit committee precisely so they can give an objective view, and external auditors are independent by design.

Maturity assessments can be done independently, by an adviser, but are very often self-assessments. Their value comes from honesty and shared understanding rather than independence. A well-run self-assessment involving people at different levels often surfaces issues that an outsider would miss, as long as people feel safe answering candidly.

Method

Audits test against criteria using evidence. Auditors sample transactions, inspect records, re-perform controls and document what they find. The question is whether the evidence supports a conclusion that controls are designed and operating effectively.

Maturity assessments compare current practice against descriptions of each maturity level. They rely more on informed judgement, often from several people, and focus on patterns of behaviour rather than individual transactions. They are quicker and cheaper, but they do not provide tested evidence.

Output

An audit produces findings, usually rated by severity, with agreed management actions and deadlines. It may also give an overall opinion, such as "satisfactory" or "needs improvement".

A maturity assessment produces a profile: where each part of the capability stands today, where you want it to be, and what the gap looks like in practice. The output is a starting point for an improvement plan, not a verdict.

Tone and behaviour

Because audits can lead to critical findings reported to senior leaders, people naturally approach them carefully. They present evidence, explain controls and, sometimes, put their best foot forward.

Maturity assessments work best in a more open, improvement-focused atmosphere. If people believe the score will be used to judge them, they will inflate it, and the assessment loses its value. Our article on avoiding bias in self-assessments covers how to keep answers honest.

When to use which

Use an audit when:

• You need assurance for a board, regulator, customer or certification body.
• You need to know whether specific controls are working, with evidence.
• There has been an incident and you need an objective view of what went wrong.

Use a maturity assessment when:

• You want to understand overall strengths and weaknesses in a capability.
• You are planning an improvement programme and need to set priorities.
• You want to build shared understanding across a team or leadership group.
• You want to track progress over time in a consistent way.

How they work together

The two are most powerful in combination:

• Assessment before audit. A maturity assessment helps a team find and fix weaknesses before an audit, so the audit spends its time on genuinely difficult issues.
• Audit findings feed assessment. Recurring audit findings often point to a capability that is immature. A maturity assessment can show the broader pattern behind individual findings.
• Audit on maturity. Internal audit functions increasingly comment on how mature a capability is, not just whether individual controls pass, which gives leaders more useful insight.
• Assessment of audit itself. Internal audit is a capability too. Audit committees and heads of audit can assess the maturity of their own function: its independence, risk focus, methods, reporting, people and quality.

Updated October 2026: we have since added an Internal Audit & Assurance assessment for exactly that purpose. It covers mandate and independence, risk-based planning, audit execution and evidence, reporting and follow-up, people and resourcing, and quality and assurance coordination.

An example

Imagine a mid-sized organisation preparing for an external review of its risk management.

First, the risk team and a few leaders complete the Risk Management assessment. The results show that risk identification and assessment are reasonably consistent, but early warning indicators are weak and risk information rarely shapes decisions. They agree three improvements and start work.

Six months later, internal audit tests a sample of risks, controls and reports. The audit confirms that registers are maintained and reviewed, but finds two risks where controls were not operating as described. Management agrees actions with deadlines.

The assessment gave direction. The audit gave assurance. Each made the other more useful.

Frequently asked questions

Can a maturity assessment replace an internal audit?

No. A maturity assessment does not provide tested evidence or independent assurance. It is a planning and improvement tool, not a substitute for audit.

Can auditors use maturity models?

Yes. Many internal audit teams use maturity scales to describe how developed a capability is, which helps leaders see the bigger picture beyond individual findings.

How often should we do each?

Audit frequency should follow the risk-based audit plan. Maturity assessments are most useful every six to twelve months for capabilities you are actively improving.