EInvoicing in Oman

Mandatory Electronic Invoicing in Oman

Learn how to get your company ready to exchange documents in accordance with Oman requirements with the support of Comarch

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Oman is on the Road to E‑invoicing

The Fawtara e-invoicing pilot has been live in Oman since August 2026. Under Tax Authority Decision No. 189/2026, e-invoicing becomes mandatory from April 1, 2027, following a pilot with around 100 selected large taxpayers launched in August 2026.

E-Invoicing Implementation timeline

Implementation timeline

The system is implemented through a pilot and two mandatory phases, with government entities to follow:

  • Pilot: Around 100 selected large VAT-registered companies; live since August 2026 (no mandatory compliance before 1 April 2027).
  • Phase 1: Businesses with annual supplies exceeding OMR 5 million, mandatory from April 1, 2027.
  • Phase 2: All remaining VAT-registered businesses (annual supplies not exceeding OMR 5 million), mandatory from October 1, 2027.

Companies outside the pilot group can adopt the system voluntarily before their mandatory date.

E-invoicing process description

E-invoicing process description

OTA has adopted a Peppol-based 5-corner model. This framework ensures real-time reporting to the tax authority (the 5th corner) while maintaining seamless interoperability between business partners, aligning Oman with international standards used in the UAE and Singapore.

Who is obliged to use e‑Invoicing in Oman

E-invoicing is currently voluntary in Oman (pilot since August 2026), with mandatory obligations from April 1, 2027 (annual supplies above OMR 5 million) and October 1, 2027 (all other VAT-registered taxpayers), and B2G requirements expected to follow in 2028.

Archiving requirements for e‑invoicing in Oman

The required storage period is 10 years (5 years in the system and 5 years in an electronic archive).

How we can help

Comarch is officially recognized as an Accredited Service Provider (ASP) in Oman. We ensure seamless integration with the OTA's 5-corner model, enabling our clients to meet Omani regulations efficiently.

Why is Comarch the best choice?

We have 20+ years of experience in carrying out various EDI, e-invoicing, and other document exchange projects around the world. In those years, we have successfully connected more than 130,000 entities from over 60 countries.

  • 1. Legal compliance

    Full compliance with the latest data exchange regulations and modern data transfer standards

  • 2. Digitization

    Applying new technologies and IT solutions in order to streamline workflows and automate activities and procedures

  • 3. Individual approach

    Tailor-made solutions based on processes specific to each company – own road map and a suitable pace of changes

  • 4.Security

    Highest level of security for all sensitive and important company data

    Read more about Comarch e-invoicing

    Legal regulation changes in Oman

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