How often is tax law amended and what is the process?
-There is no fixed amendment cycle, and the pace of legislative change varies considerably depending on policy developments, international commitments and practical issues arising from implementation.
The Ministry of Finance typically leads the development of proposed tax legislation and its supporting policy rationale. Primary tax legislation is enacted through Federal Laws or Federal Decree-Laws in accordance with the applicable constitutional procedures and published in the Official Gazette. Increasingly, the Ministry also consults publicly before finalising major reforms, as it did for the implementation of the Pillar Two global minimum tax rules and for the Crypto-Asset Reporting Framework.
Detailed rules may also be introduced through Cabinet and Ministerial Decisions under powers conferred by the legislation. The Federal Tax Authority (“FTA”) issues guides and public clarifications. Since 1 January 2026, the FTA may also issue decisions on the application of tax legislation that bind both the FTA and taxpayers. As a result, many material developments in the tax framework arise through implementing decisions and administrative guidance without requiring amendments to the primary legislation itself.
When broader reform is needed, changes can be made at several levels at once. The tax administration reforms that took effect in 2026, for instance, combined amendments to the VAT Law and the Tax Procedures Law (Federal Decree-Laws No. 16 and 17 of 2025) with a revised penalty regime (Cabinet Decision No. 129 of 2025) and amendments to the Executive Regulation of the Tax Procedures Law (Cabinet Decision No. 17 of 2026).
A further feature of the evolving UAE tax framework is that amendments may, in some cases, take effect retrospectively. This can require taxpayers to revisit positions taken in earlier periods under the rules then in force. For example, amendments to the VAT Executive Regulation introduced by Cabinet Decision No. 100 of 2024 exempted the transfer and conversion of virtual assets with effect from 1 January 2018. More recently, Ministerial Decision No. 229 of 2025, issued on 28 August 2025, revised the rules governing Qualifying Activities for Free Zone Persons but expressly took effect from 1 June 2023. Retroactive changes may be favourable to taxpayers, but they can also create practical uncertainty where historic positions have already been filed or otherwise treated as settled.
A related issue of legal certainty may arise where legislation is published only after its stated effective date, leaving taxpayers limited time to identify and implement new obligations.
