Oman's Fawtara e-invoicing mandate: a detailed look at the Gulf region's Peppol-based system

Context

Oman's Fawtara e-invoicing mandate is structured around a four-phase rollout, commencing with a pilot phase on 1 August 2026. The Oman Tax Authority (OTA) has set specific criteria for selecting participants in the initial phase, focusing on large VAT-registered companies. These criteria include company size, invoice volume, sector representation, technical readiness, and tax compliance history.

The mandate's decentralized Peppol five-corner model distinguishes it from clearance-based systems in the Middle East and Africa. Under this system, suppliers issue invoices through Accredited Service Providers (ASPs) connected to the Peppol network, while Tax Data Documents (TDDs) are reported separately to the OTA. This approach shifts compliance responsibilities onto businesses and their ASPs, rather than relying on a centralized authority for invoice clearance.

What's changing in practice

The Fawtara mandate introduces several key changes to Oman's e-invoicing landscape:

Peppol network integration

Only invoices exchanged via the Peppol network through an ASP will be legally valid for B2B transactions. This requirement ensures that all VAT-registered businesses must register an ASP through the Fawtara Portal to obtain Peppol network access.

B2C and human-readable invoices

B2C invoices must be reported to the OTA within 24 hours in structured XML format. Human-readable B2C invoices are delivered outside the Peppol network but must comply with specific QR code requirements. These QR codes must encode six data fields: seller name, seller VAT number, timestamp, invoice total with VAT, VAT total, and Seller UUID.

Technical specifications

Invoice formats must adhere to OM PINT and TDD XML schemas, both UBL-based. The OTA will not generate QR codes or issue clearance invoice numbers; these responsibilities fall on businesses and their ASPs.

Broad scope

The mandate covers B2B, B2C, and B2G transactions, as well as exports, imports, and multiple document types. This includes tax invoices, simplified invoices, credit notes, debit notes, self-billed invoices, and TDDs. Non-resident VAT-registered taxpayers are also included in the scope.

Implications for businesses

Businesses operating in Oman must prepare for several key changes:

Compliance requirements

Companies must register an ASP through the Fawtara Portal to obtain Peppol network access. This registration is crucial for ensuring that invoices exchanged via the Peppol network are legally valid for B2B transactions.

Technical readiness

Businesses must ensure their systems can generate invoices in compliance with OM PINT and TDD XML schemas. Additionally, they must implement QR code generation for B2C and human-readable invoices, encoding the required six data fields.

Reporting obligations

B2C invoices must be reported to the OTA within 24 hours in structured XML format. This reporting obligation adds a layer of compliance that businesses must integrate into their existing processes.

Non-resident taxpayers

Non-resident VAT-registered taxpayers must also comply with the Fawtara mandate. This includes ensuring that their invoices meet the technical specifications and reporting requirements outlined by the OTA.

Outlook and what to watch

As of late June 2026, regulatory documents for the Fawtara mandate are still emerging. Businesses should closely monitor updates from the OTA to stay informed about any changes or additional requirements.

Near-term milestones

The pilot phase launches on 1 August 2026, targeting 100 large VAT-registered companies. Phase 2, extending the mandate to all remaining large VAT-registered businesses, is scheduled for 1 February 2027. Phase 3, covering all VAT-registered businesses including SMEs, is set for 1 August 2027. Government transactions (G2B) are expected to follow in 2028.

Open questions

Businesses should remain vigilant about any updates to the technical specifications and regulatory documents. The OTA's role in generating QR codes or issuing clearance invoice numbers remains unclear, placing the responsibility on businesses and their ASPs.

Second-order effects

The decentralized Peppol five-corner model may influence other Gulf region countries considering e-invoicing mandates. The success of Fawtara could set a precedent for similar systems in the Middle East and Africa.