Oman E-Invoicing Rollout: Timeline & Fawtara Portal

March 27, 2026

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As part of the nationwide implementation of the e-invoicing system, the Oman Tax Authority (OTA) launched the e-invoicing platform. This marks a significant step in the country's four-stage gradual rollout process, designed to give businesses time to adapt. Moreover, the launch of the national e-invoicing platform aligns with the previously set timeline for both the platform's launch and the imposition of e-invoicing requirements.

The Fawtra Portal and Following Steps

In December 2025, OTA announced the implementation timeline for the Fawtara system, stating that the service provider registration portal will open in Q1 of 2026. Now, when the portal is launched, service providers may apply for accreditation. In Q2 2026, potentially in May, the test environment is expected to be available to service providers. Finally, from Q3 2026, a taxable person will be able to exchange, receive, and report e-invoices to OTA via their service providers, in accordance with the specified roll-out scheme.

This timeline for launching a fully operational Fawtara Portal aligns with the four-stage implementation timeline for different categories of taxable persons. According to this plan, from August 2026, the 100 largest VAT-registered companies will become subject to mandatory e-invoicing.

The next two phases, scheduled for February 2027 and August 2027, will bring all other large VAT-registered companies and the remaining VAT-registered companies under the scope of the e-invoicing regulations, respectively. Companies participating in Phase 2 have started receiving notifications confirming their inclusion, along with a requirement to complete a detailed survey by April 2, 2026. The fourth and final phase will require government entities to exchange e-invoices. However, the implementation date has not yet been set.

Conclusion

The OTA is making firm steps towards the planned introduction and implementation of a nationwide e-invoicing system. However, while OTA released a draft Data Dictionary outlining the structure and content requirements for e-invoices and held multiple workshops with both taxable persons and prospective service providers to clarify expectations and gather feedback, it has not yet released the final version of the e-invoicing data dictionary. Once the final version is released, taxable persons will have a clear set of requirements, scope, and business rules.

Source: Fawtara Portal, KPMG, VATabout

What is the Oman e-invoicing rollout timeline?

Oman’s e-invoicing rollout follows a four-stage process. The Fawtara Portal opens for service provider registration in Q1 2026, testing begins in Q2 2026, and live invoicing starts in Q3 2026. Mandatory adoption begins in August 2026 for the largest VAT-registered companies, with further phases extending into 2027.

What is the Fawtara Portal and when will it be available?

The Fawtara Portal is the central platform launched by the Oman Tax Authority to support e-invoicing. Service providers can register starting in Q1 2026, and a test environment is expected in Q2 2026 to allow technical preparation before full implementation.

When will e-invoicing become mandatory in Oman?

E-invoicing becomes mandatory in phases starting in August 2026 for the 100 largest VAT-registered companies. Additional groups of businesses will be included in February 2027 and August 2027, progressively covering all VAT-registered entities.

What are the phases of Oman’s e-invoicing implementation?

he implementation is divided into four phases. The first phase targets the largest VAT-registered companies, followed by other large taxpayers and then all remaining VAT-registered businesses. The final phase will include government entities, although its start date has not yet been confirmed.

What is required from companies selected for Phase 2?

Companies selected for Phase 2 have begun receiving notifications from the Oman Tax Authority and must complete a detailed survey by April 2, 2026. This survey assesses their technical readiness and current systems for e-invoicing compliance.

Has Oman finalized the e-invoicing data dictionary?

No, the Oman Tax Authority has released only a draft Data Dictionary outlining e-invoice structure and requirements. The final version has not yet been published, but once released, it will provide clear technical and compliance guidelines for businesses.

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