Tax Authority Updates AEOI Rules to Strengthen International Transparency from 2026

Oman, 05 January, 2026: The Tax Authority has issued Decision No. 388/2025, amending provisions of Decision No. 78/2020 on the Automatic Exchange of Financial Account Information (AEOI), as part of efforts to enhance tax transparency and align with international standards.

The amendments aim to improve the accuracy and quality of financial data exchanged and to streamline information flow between financial institutions and the Tax Authority, strengthening the Sultanate of Oman’s position in global tax transparency and anti–tax evasion frameworks.

Key amendments introduce additional disclosure requirements for financial institutions, including:

• Submission of certified self-certifications for all account holders and controlling persons

• Clear identification of the role and capacity of controlling persons and equity holders

• Classification of accounts as pre-existing or new, and identification of joint accounts

• Enhanced transparency for investment entities, including ownership roles and equity interests

The amended rules will take effect from 1 January 2026, with 2027 being the first reporting year. Reports under the new requirements must be submitted by 30 May 2027.