What is Audit Documentation?

Audit documentation is the written record of the audit procedures performed, evidence obtained, judgments made, and conclusions reached during an engagement. It supports the auditor’s opinion by showing how the work addressed identified risks, material account balances, disclosures, and relevant assertions. Documentation may include audit programs, schedules, confirmations, correspondence, analytical reviews, test results, memos, and review notes. It should be detailed enough for an experienced auditor with no prior connection to the engagement to understand what was done, who performed and reviewed the work, when it was completed, and what conclusions were reached. Strong documentation also supports supervision, quality control, regulatory inspection, and defense of the auditor’s work if questions later arise. Poor documentation weakens the credibility of the audit.

Why Audit Documentation is Needed

The proper preparation of audit documentation is critical for several reasons, including the following:

It can be used as a defense if the auditor is ever accused of negligence.
It is easier for a reviewer to examine.
It represents a better level of quality control over an audit.
It shows auditors in later years how the audit was conducted.
It can be used as a training tool for junior auditors.

Types of Audit Documentation

The types of audit documentation that should be assembled include the following:

Physical analyses conducted. Auditors routinely conduct a physical examination of the more expensive assets listed in a client’s accounting records, to verify that they exist. This most commonly applies to fixed assets and inventory.
Confirmation letters. Auditors use third parties to confirm that assets and liabilities exist, and document their statements with confirmation letters. This can include all types of confirmations, including bank, loan, and consigned inventory confirmations.
Representation letters. This is a form letter written by a company's external auditors, which is signed by senior company management. It attests to the accuracy of the financial statements that the company has submitted to the auditors for their analysis.
Records of oral interviews. This is documentation of any discussions with the client regarding business procedures, transactions, and so forth.
Documentation of analytical procedures. Auditors summarize the results of their analytical procedures, including the nature of the procedures conducted and their findings and conclusions.
Documentation of substantive procedures. Auditors summarize the results of their substantive procedures, including the observation of a physical inventory, examining specific control points for efficacy, and confirming cash balances with banks.

In the interests of keeping the audit documentation down to a manageable length, it is not necessary to include corrected copies, duplicates, notes regarding preliminary conclusions, and superseded drafts.

Terms Similar to Audit Documentation

Audit documentation is also referred to as audit working papers.

Audit Documentation FAQs

How long must audit documentation be retained?

Audit documentation must typically be retained for a minimum of five to seven years, depending on the jurisdiction and applicable regulations. In the United States, PCAOB standards require a retention period of seven years from the date the auditor’s report is released. This retention ensures records are available for regulatory review, legal inquiries, or quality control inspections.