Internal vs. External Audit: Procedure, What It Is, How to Conduct, and Purpose

Managing both internal and external audit procedures is essential for businesses operating in Dubai. Internal audit work supports a company’s financial health from within, helping identify and address financial stress before it becomes serious. External audit, by contrast, is an independent process that gives stakeholders confidence in the company’s financial stability through an outside opinion, not by fixing a company’s own mistakes for it. Strict standards apply to both, ensuring a detailed, accurate audit process either way. An approved top audit firm in Dubai can run an efficient, compliant audit process for your company under the applicable regulations and laws.

What Is an Internal Audit System?

An internal audit system is the function that evaluates and monitors a company’s internal financial controls, accounting processes, and corporate governance. It’s a structured, disciplined process built to assess internal operations systematically, manage risk, surface insights for improving results, and help safeguard company assets.

What Is an External Audit System?

An external audit involves an independent third party examining a company’s financial records to form an opinion on whether they’re fairly presented. External auditors assess a company’s overall financial management and processes, and offer recommendations for improvement. This examination has to be carried out by a CPA-certified outsider, not an employee of the company, to keep the results genuinely unbiased.

Read more: How to Prepare for an External Audit: The Ultimate Guide

How to Conduct an Audit Procedure in Dubai

A complete audit procedure generally runs through six stages:

• Audit planning
• Building the client relationship
• Preliminary survey
• Fieldwork and transaction testing
• Reporting draft
• Follow-up report

Procedures of Internal and External Audit

1. Audit Planning

The planning phase kicks off the audit. The auditor and client meet to discuss scope, risk factors, and audit objectives. Relevant information and data are gathered, and the rest of the audit is planned out in detail.

2. Building the Client Relationship

Establishing trust with the client is an essential part of planning the audit properly. The plan sets out how the auditor will approach the work and identifies the key areas that need closer inquiry.

Also check: Statutory Audit Services in Dubai

3. Preliminary Survey

This stage builds a general overview of operations, gathering further data and reviewing it with key personnel before fieldwork begins.

4. Fieldwork and Transaction Testing

The steps identified during planning and the preliminary survey are put into practice. The auditor’s main focus here is transaction testing, validating whether the data gathered actually holds up, so the final report reflects only genuinely significant findings.

5. Reporting Draft

Once fieldwork wraps up, a draft report covering recommendations, opinions, and significant findings is shared with the client for review, along with a timeline for addressing any issues before the report is finalized.

6. Follow-Up Report

The final stage tracks progress against the client’s response to the draft findings. Any findings still unresolved at this stage are typically reported to the relevant oversight committee, often as part of annual reporting.

Related: Compliance Audit Services in Dubai

Purpose of Internal and External Audit Procedures

Internal and external audits share a broadly similar overall objective and process, with real differences in scope and procedure. Internal audit focuses on internal assessment and process improvement, producing findings the company uses to improve itself from within. External audit operates within a more narrowly defined statutory scope, centered on the financial statements themselves, so the two ultimately serve different purposes even where their methods overlap.

Internal Audit vs. External Audit

Aspect	Internal Audit	External Audit
Performed by	In-house team, or self-selected department team	Independent, CPA-certified outsider
Certification required	Not required, though many hold professional certification	CPA certification required
Scope	Broad, covers operations, controls, and governance	Defined, centered on the financial statements
Audience	Internal management and the board	Shareholders, regulators, lenders
Frequency	Ongoing or periodic	Typically annual, often statutory

Role and Stages of Internal Audit

• Internal audit plays a significant role in governing a company’s internal controls and corporate governance
• Its reports are generally used within the company to improve internal management systems
• Only a targeted department or a self-selected audit team is typically involved, and CPA certification isn’t required for internal audit work
• Internal audits help maximize resource use and identify opportunities for cost reduction
• Employee errors can be identified and corrected quickly, improving overall effectiveness

Role and Stages of External Audit

• An external auditor must be CPA-certified and independent of the company being audited
• Their central role is forming an opinion on whether the financial statements give a true and fair view of the company’s financial position, which may involve reviewing internal audit files as part of that work
• They confirm the audit itself is thorough and free from error, and report any indications of fraud alongside the overall audit findings, typically on an annual basis

Also check: Financial Statement Audit Services in Dubai

Worked Example

A Dubai manufacturing company runs an internal audit each quarter covering procurement and inventory controls, catching a recurring stock discrepancy in month three that gets corrected before it compounds further. At year-end, the company’s external auditor conducts the statutory audit of the financial statements, reviewing the internal audit’s working papers as part of understanding the company’s control environment, but still independently testing transactions and forming its own opinion. The two processes complement each other without duplicating the same work.

Common Mistakes When Managing Internal and External Audits

• Treating internal audit findings as equivalent to an external audit opinion. They serve different purposes and audiences, one doesn’t substitute for the other.
• Assuming internal auditors need CPA certification. Internal audit work doesn’t require it, though many practitioners hold relevant professional credentials regardless.
• Skipping the preliminary survey stage. Jumping straight to fieldwork without a general operational overview often means missing context that shapes what testing actually matters.
• Not tracking follow-up on unresolved findings. Findings left open without a follow-up process tend to resurface in the next audit cycle unresolved.

Frequently Asked Questions

Do internal auditors need CPA certification?

No. CPA certification is required for external auditors specifically, internal audit work doesn’t carry the same certification requirement, though many internal auditors hold relevant professional credentials.

How is the scope of an internal audit different from an external audit?

Internal audit typically covers a broader range of operations, controls, and governance matters. External audit has a more defined scope centered specifically on the fairness of the financial statements.

Can the same findings from an internal audit be used in an external audit?

External auditors may review internal audit working papers as part of understanding the company’s control environment, but they still perform independent testing and form their own opinion rather than relying solely on internal findings.

How often should internal and external audits be conducted?

Internal audit is often ongoing or periodic, run at whatever cadence suits the business. External audit is typically annual, and often a statutory requirement.

What happens to unresolved findings after an audit?

They’re tracked through a follow-up report and, where still unresolved, typically reported to the relevant oversight committee, often as part of annual reporting.

Getting the Most From Both Audit Types

Internal and external audit aren’t competing processes, they work best when the internal function catches issues early enough that the external audit becomes a confirmation exercise rather than a source of surprises.

Audit Firms in Dubai can run both internal and external audit engagements for your business, managing your financial statements accurately and in full compliance with UAE law.