IAASB issues new amendments on using the work of external experts

In January 2026, the International Auditing and Assurance Standards Board (IAASB) issued Narrow-Scope Amendments to IAASB Standards Arising from the IESBA’s Using the Work of an External Expert Project (the Targeted Amendments) in response to the International Ethics Standards Board for Accountants’ (IESBA) recently approved revisions to its International Code of Ethics for Professional Accountants (including International Independence Standards) (the IESBA Code) to add provisions for using the work of an external expert to the IESBA Code.

The Targeted Amendments affect the following standards:

• ISA 620, Using the Work of an Auditor’s Expert
• ISRE 2400 (Revised), Engagements to Review Historical Financial Statements
• ISAE 3000 (Revised), Assurance Engagements Other than Audits or Reviews of Historical Financial Information
• ISRS 4400 (Revised), Agreed-upon Procedures Engagements

The Targeted Amendments are effective for audits and reviews of financial statements for periods beginning on or after December 15, 2026, and for other assurance and related services engagements beginning on or after December 15, 2026.