A financial audit, or more accurately, an audit of financial statements, is the verification of the financial statements of a legal entity, with a view to express an audit opinion. The audit opinion is intended to provide reasonable assurance that the financial statements are presented fairly, in all material respects, and/or give a true and fair view in accordance with the financial reporting framework. The purpose of an audit is to enhance the degree of confidence of intended users in the financial statements.

Financial audits are typically performed by firms of practicing accountants who are experts in financial reporting. The financial audit is one of many assurance functions provided by accounting firms. Many organizations separately employ or hire internal auditors, who do not attest to financial reports but focus mainly on the internal controls of the organization. External auditors may choose to place limited reliance on the work of internal auditors.

Internationally, the International Standards on Auditing (ISA) issued by the International Auditing and Assurance Standards Board (IAASB) is considered as the benchmark for audit process. Almost all jurisdictions require auditors to follow the ISA or a local variation of the ISA.