Fawtara E-Invoicing in Oman: Is Your Business Ready?

Oman is introducing a mandatory national e-invoicing system called Fawtara. It is built on the Peppol five-corner model, and it will eventually apply to every VAT-registered business in the country.

The rollout is phased, which means most businesses have time. It also means most businesses will underestimate how much has to change before their phase begins.

Who must comply with Fawtara, and when?

The Oman Tax Authority is introducing Fawtara in three phases:

Phase	Date	Who is affected
Phase 1	August 2026	Approximately 100–153 of Oman’s largest VAT-registered taxpayers, individually notified by the OTA
Phase 2	February 2027	All other large taxpayers
Phase 3	August 2027	All remaining VAT-registered businesses, including SMEs

If you are not certain which phase applies to you, the Tax Authority has published a self-check tool on its portal: enter your VAT identification number and it will return your rollout phase.

What is Fawtara, in plain terms?

Fawtara replaces the invoice you currently issue with a structured electronic invoice that is validated in real time before it reaches your customer.

Invoices must be issued in structured XML, UBL 2.1, following the PINT-OM specification the OTA published in April 2026, with a human-readable PDF/A-3 copy. Businesses transact through an Accredited Service Provider (ASP) approved by the Tax Authority, which handles validation and transmission.

The Oman Tax Authority became the country’s official Peppol Authority in January 2026.

What does a business actually need to do?

Four things, in roughly this order.

Confirm your phase. Use the OTA self-check tool. Phase 3 businesses have until August 2027, but the work required is not trivial.

Select an accredited service provider. You cannot transact directly; an ASP is required. Availability and integration lead times will tighten as each phase approaches.

Adapt your accounting or ERP system. Your system must produce compliant structured invoices containing every mandatory field. For many businesses this is the longest part of the project and the one most often started too late.

Fix your archiving. Invoices must be retained for ten years under Article 70 of the VAT Law, five years in-system and five in electronic archive. Invoices relating to real estate must be retained for fifteen years.

What happens if we are not ready?

E-invoicing is not a reporting formality. Once your phase begins, an invoice that fails validation is not a valid tax invoice. That affects your customer’s ability to recover input VAT as much as your own compliance position, which means readiness becomes a commercial issue with your customers, not only a regulatory one.

Where to start

The businesses that will find this straightforward are the ones treating it as a systems project rather than a filing change, and starting a full phase ahead of their deadline.

If you would like help establishing which phase applies to you, assessing what your current system can and cannot produce, or selecting an accredited service provider, get in touch.