Oman — OTA and Fawtara

The Oman Tax Authority (OTA) is rolling out an e-invoicing programme branded Fawtara, built on the Peppol 5-corner (DCTCE) model where the tax authority is the fifth corner. The announced timeline schedules a pilot in August 2026, a mandate for large taxpayers in February 2027, then extension to all VAT-registered taxpayers in August 2027. As of this page (June 2026) no mandate is yet in force: the status is planned.

Regulatory timeline

• 16 October 2020 — Royal Decree 121/2020. Oman's VAT Law is enacted.
• 16 April 2021 — VAT goes live. Standard rate of 5%, administered by the Oman Tax Authority (OTA).
• 2024-2025 — E-invoicing programme design. The OTA selects the Peppol 5-corner model and consults software vendors and service providers.
• January 2026 — Peppol Authority. The OTA becomes the Peppol Authority for Oman, anchoring the Fawtara programme in the Peppol ecosystem (reported; to confirm with OpenPeppol).
• April 2026 — PINT OM specification. Announced publication of an Oman-specific PINT profile (PINT OM) and service-provider accreditation standards (to confirm).
• August 2026 — Pilot / Phase 1. Planned start with around 100 large VAT-registered taxpayers selected by the OTA.
• February 2027 — Phase 2. Mandate for all large VAT-registered taxpayers.
• August 2027 — Phase 3. Extension to all remaining VAT-registered taxpayers (B2B).
• Later — B2G / public institutions. A separate timeline for the public sector, to be announced (to confirm).

Technical schema

The Fawtara programme is built on the Peppol framework. The target format is the PINT OM profile (Peppol International Invoice adapted for Oman), a UBL 2.1 syntax aligned with the PEPPOL BIS Billing semantics. The detailed specification is being published by the OTA (to confirm).

• Syntax: UBL 2.1 XML (Invoice and CreditNote), PINT OM profile; a human-readable PDF/A-3 may accompany the exchange in some scenarios.
• VAT identifiers: the Omani VATIN identifies seller and buyer; routing uses Peppol identifiers (Participant ID).
• Currency: OMR (Omani rial); standard VAT rate 5%, plus 0% and exempt categories under the VAT Law.
• Integrity: handled by the Peppol network and accredited Access Points rather than an issuer XAdES signature (unlike the Saudi model).

Minimal PINT/UBL invoice example (illustrative — the final PINT OM profile prevails):

<Invoice xmlns="urn:oasis:names:specification:ubl:schema:xsd:Invoice-2">
  <cbc:CustomizationID>urn:peppol:pint:billing-1@om-1</cbc:CustomizationID>
  <cbc:ProfileID>urn:peppol:bis:billing</cbc:ProfileID>
  <cbc:ID>INV-2026-0001</cbc:ID>
  <cbc:IssueDate>2026-08-15</cbc:IssueDate>
  <cbc:InvoiceTypeCode>380</cbc:InvoiceTypeCode>
  <cbc:DocumentCurrencyCode>OMR</cbc:DocumentCurrencyCode>
  <cac:AccountingSupplierParty>
    <cac:Party>
      <cac:PartyTaxScheme>
        <cbc:CompanyID>OM1100000000</cbc:CompanyID>
        <cac:TaxScheme><cbc:ID>VAT</cbc:ID></cac:TaxScheme>
      </cac:PartyTaxScheme>
    </cac:Party>
  </cac:AccountingSupplierParty>
</Invoice>

Submission flow

Fawtara is built on the Peppol 5-corner model (DCTCE — Decentralized CTC and Exchange). Unlike a blocking clearance model, the OTA receives the invoice in near real time without signing or returning it as a condition of validity — it is a post-audit-style CTC report grafted onto the Peppol 4-corner exchange.

• Corner 1 — Seller: issues the invoice from its ERP/software.
• Corner 2 — Seller's Access Point: an OTA-accredited provider that validates the PINT OM format.
• Corner 5 — OTA / Fawtara: receives a copy of the invoice for tax control (the fifth corner of the model).
• Corner 3 — Buyer's Access Point: receives and routes the invoice.
• Corner 4 — Buyer: receives the invoice in its system.

Seller ─> Seller AP ──> Buyer AP ─> Buyer
  (C1)      (C2)           (C3)       (C4)
              \
               \─> OTA / Fawtara (C5)  CTC reporting

The August 2026 pilot validates this flow with a small group of large taxpayers before the February 2027 mandate.

Validation

• OTA portal: tms.taxoman.gov.om — tax services, VAT registration and e-invoicing publications.
• PINT OM specification: Oman's Peppol International (PINT) profile, to publish/consult on the OTA portal and the OpenPeppol site (to confirm).
• OpenPeppol: peppol.org — directory of Peppol Authorities and PINT profiles.
• Service-provider accreditation: OTA criteria (Oman registration, minimum capital, ISO/IEC 27001, MFA and encryption) to verify in the official accreditation call.

Common pitfalls

1. Mistaking Fawtara for a clearance model. Oman follows the Peppol 5-corner (CTC reporting) model, not a Saudi-style blocking clearance: the invoice does not need a signed OTA response to be valid. Copying a ZATCA Phase 2 architecture would be over-engineering.
2. Dates are still provisional. Pilot (Aug 2026), large taxpayers (Feb 2027) and full rollout (Aug 2027) are announced but may slip. Treat these milestones as planned and watch OTA publications.
3. Picking a non-accredited Access Point. Only OTA-accredited providers may transmit to Fawtara. Verify accreditation (minimum capital, ISO/IEC 27001) before contracting.
4. Assuming an issuer signature. At this stage integrity relies on the Peppol network and Access Points, not an issuer XAdES signature. Do not reuse a signing module designed for Saudi Arabia as-is.
5. Forgetting it is B2B first. The mandate targets B2B transactions of VAT-registered taxpayers; B2C and B2G follow a separate timeline (to confirm). Scope the affected flows before investing.

Cross-links

• PEPPOL — the network and PINT profiles underpinning Fawtara (5-corner model).
• Saudi Arabia — GCC neighbour, but a ZATCA Phase 2 clearance model (useful contrast).
• United Arab Emirates — another Gulf Peppol 5-corner programme.
• Qatar and Bahrain — other GCC jurisdictions harmonising VAT/e-invoicing.