Deloitte and the Oman Tax Authority will co-host the Oman Tax Conference 2026 in Muscat on 15 September, gathering business leaders to discuss the Sultanate’s fast-changing tax landscape. The agenda, from the GCC’s first personal income tax to mandatory e-invoicing, reflects how quickly Oman is reshaping its tax system under Vision 2040.

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For most of its modern history, Oman, like its Gulf neighbours, asked very little of individuals and businesses in tax. On 24 August 2026, Deloitte confirmed it will co-host the Oman Tax Conference 2026 with the Oman Tax Authority in Muscat on 15 September, bringing together business leaders, large taxpayers and officials to make sense of a changing tax landscape that looks very different from the one they knew a few years ago.

The agenda reads like a map of Oman’s fiscal reforms. It covers personal income tax, e-invoicing, the use of artificial intelligence in tax administration, indirect tax, and transfer pricing. Two of those are not distant possibilities but imminent realities, and they are what make the event more than a routine industry gathering.

The Reforms Behind the Agenda

The headline reform is personal income tax. Under Royal Decree 56/2025, Oman will levy a 5% tax on individuals earning more than OMR 42,000 a year, roughly $109,000, from 1 January 2028. It is a modest rate with a high threshold, but its significance is outsized. Oman is the first country in the Gulf Cooperation Council to tax personal income at all, breaking with a regional model long defined by the absence of such taxes. Because the threshold sits so high, the Oman Tax Authority estimates roughly 99% of the population will fall outside it, leaving the levy aimed squarely at top earners.

The second live change is e-invoicing. Oman, which introduced a 5% value-added tax in April 2021, is now rolling out a mandatory electronic invoicing system branded Fawtara, built on the international Peppol framework. The first phase became mandatory in August 2026 for the country’s 100 largest VAT-registered companies, with further phases extending into 2027 and 2028. For finance teams, the shift from paper and PDF invoices to structured digital ones is already under way.

A Push to Move Beyond Oil

Behind both moves is the same logic: Oman has spent years trying to reduce its reliance on oil revenue and put its budget on steadier footing, a goal formalised in Vision 2040, which aims to lift non-oil revenue to around 18% of GDP by 2040. Building a broader, more digital tax system is central to that plan, and it is why the government and its advisers are keen to bring businesses along rather than surprise them.

“This conference marks an important milestone in the continued development of Oman’s tax system and reflects the Tax Authority’s commitment to strengthening collaboration with all stakeholders. By bringing together representatives from the public and private sectors, the conference will provide a valuable platform to exchange perspectives, discuss key tax developments, and support transparency, voluntary compliance, and the continued evolution of Oman’s tax landscape in line with Oman Vision 2040,” said Abdul Aziz Al Rawahi, Director General of the Tax Compliance Directorate at the Oman Tax Authority.

For Deloitte, which has advised across the region since 1926, the event is also part of a push to deepen its tax practice in Oman.

“The Oman Tax Conference 2026 reflects our continued commitment to supporting Oman’s evolving tax ecosystem through close collaboration with the Oman Tax Authority. By bringing together policymakers and the business community, the conference will provide practical insight into regulatory developments while helping organizations navigate change with confidence. At Deloitte, we are proud to work hand in hand with OTA as a trusted advisor, supporting transparency, informed decision-making, and sustainable economic growth,” said Muhammad Bahemia, Middle East Tax Leader at Deloitte.

The conference itself will last a day, but the changes it addresses will shape how businesses in Oman operate for years. A country that once stood out for how little it taxed is steadily assembling a full modern tax system: value-added tax, excise, corporate tax, digital invoicing and, from 2028, a tax on personal income. For the companies in the room on 15 September, the message is straightforward enough. The rules are moving, the timelines are short, and the moment to prepare is now.

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