E-invoicing in Oman (Fawtara): what businesses need to know

Oman is moving from paper and PDF invoices to structured, government-validated electronic invoicing under the Oman Tax Authority's (OTA) "Fawtara" programme. Following the OTA's consultative workshops in early 2026, the technical direction is now clear: a Peppol-based model with centralized oversight and mandatory coverage across all transaction types. If your business is VAT-registered, here is what it means and how to get ready.

What e-invoicing is

E-invoicing means issuing invoices in a structured electronic format (XML or JSON) that systems generate, exchange and validate automatically — not a PDF or a scan. Each invoice is reported to the OTA, improving accuracy, speed and tax compliance.

The Peppol 5-Corner Model

Oman has adopted a Peppol-based 5-Corner model — the international standard also used elsewhere in the region. In practice:

The OTA operates a centralized Peppol Service Metadata Publisher (SMP); businesses and providers cannot run their own.
All invoice data must be routed through OTA-accredited Peppol Access Points.
The OTA (the "fifth corner") keeps full visibility and governance over every invoice exchanged.

Crucially, a direct ERP-to-OTA connection is not allowed — every business must send and receive invoices through an OTA-accredited service provider (ASP).

Mandatory for B2B, B2C and B2G

Unlike countries that phase by transaction type, Oman is making e-invoicing mandatory at once for business-to-business (B2B), business-to-consumer (B2C — so POS systems must be upgraded) and business-to-government (B2G). Every VAT-registered entity is in scope.

The rollout timeline

Q1 2026 — service-provider registration and accreditation opens.
Q2 2026 — testing and compliance checks for service providers.
Q3 2026 — pilot phase with selected large taxpayers.
Q1 2027 — mandatory go-live for all large taxpayers.
Q1 2027 onward — mandatory go-live for other taxpayers, with the programme completing through 2027–2028.

Timelines and technical details can be refined by the OTA, so always confirm the latest guidance for your category.

What your invoices will need

Compliant invoices follow a structured data dictionary based on the UBL 2.1 standard, with defined fields, validation rules, a mandatory QR code and an XAdES-based digital signature. We break this down in our Oman e-invoicing data dictionary guide.

How to prepare now

Check whether your ERP/POS can export structured UBL 2.1 XML/JSON and connect via API.
Confirm your VAT configuration and master data are clean and accurate.
Plan to work with an OTA-accredited service provider (ASP) — engage early to avoid the rush.
Review data-residency and hosting to meet Omani requirements.

How WITSOLS helps

We get your Odoo or ERPNext system ready for Fawtara — clean data, correct VAT setup, structured invoice output, and integration with an accredited service provider, so e-invoicing becomes part of your normal sales flow. Contact us for an e-invoicing readiness assessment, and see our VAT compliance guide.