What is e-invoicing?
The Tax Authority defines e-invoicing as issuing invoices electronically in a standard digital format. The invoice goes automatically between the seller, the buyer and the Tax Authority for validation. It replaces paper and PDF invoices. The national programme is called Fawtara.
A PDF that you email to a customer is not an e-invoice in this sense. The Tax Authority FAQ states that invoices must be issued in XML format as the mandatory structured format. A person can still read the invoice, but the data travels in a form that systems can check.
Who must comply, and when?
The Tax Authority FAQ lists four phases:
- Phase 1: one hundred large VAT-registered companies, from August 2026.
- Phase 2: all large VAT-registered companies, from February 2027.
- Phase 3: all remaining VAT-registered taxpayers, from August 2027. The FAQ confirms that small and medium enterprises are in this phase.
- Phase 4: government institutions and entities, from February of a year that is still to be announced.
The first phase was selected on criteria such as revenue size, annual invoice volume and technical readiness. A company outside the first phase may adopt the system early on a voluntary basis. The Tax Authority says it contacts rollout participants at least six months before their onboarding date, and its portal has a rollout checking service where you can look up your assigned period.
How the five-corner model works
Fawtara uses a five-corner model. Each corner is one party in the exchange:
- The supplier issues the invoice.
- The supplier's service provider receives it.
- The invoice is validated and exchanged with the customer's service provider.
- The customer receives the invoice data.
- At the same time, the invoice data goes to the Tax Authority system.
The exchange runs on Peppol, an international delivery network. The Tax Authority FAQ says taxpayers can connect with any Peppol access point that the Tax Authority has accredited. It also says a business can keep its current ERP system, based on the arrangement it makes with its accredited service provider. The technical rules are in the PINT Oman specification.
What changes on the invoice itself
- The data must follow a fixed structure, so every field has one meaning. Names, addresses, tax numbers and line amounts must be complete and consistent.
- A QR code is required on the human-readable invoice. The FAQ says the QR code is mandatory for all business-to-consumer transactions, whether the invoice is full or simplified.
- Invoices must follow the date of supply and invoice issuance rules in the VAT legislation. You cannot use the new system to backdate invoices.
VAT basics that still apply
E-invoicing changes how an invoice travels. It does not change the tax itself. The Tax Authority VAT FAQs state that the standard rate is 5% on most goods and services, with a few exceptions. Some supplies are zero-rated or exempt, so your software must let you set the correct treatment for each item instead of assuming one rate for everything.
How to prepare now
- Confirm your VAT registration details and your VATIN. You need them to check your rollout period.
- Look up your phase on the Tax Authority portal, and note the date in your calendar.
- Clean your customer records. Business customers need a correct legal name, address and tax number.
- Set the VAT treatment on each product and service. Do not rely on one default rate.
- Ask your software provider three questions: can it produce invoices in the PINT Oman structure, which accredited service provider does it work with, and when will this be ready for your phase?
- Keep your paper and PDF process working until your go-live date, and test the new flow before it becomes mandatory.
Where Q+ stands today
We want to be exact here. Q+ is not an accredited Fawtara service provider, and Q+ does not submit invoices to the Tax Authority today. Q+ applies your VAT rate once you record your VAT registration and VATIN, prints your VATIN and the VAT total on tax invoices, keeps invoice lines in a structured form and calculates money in Omani rials to three decimal places. Q+ applies one rate per document, so check with your accountant how to invoice zero-rated or exempt items. We will update this page when Fawtara support is live and tested. If your business is in Phase 1 or Phase 2, talk to an accredited service provider now.