Oman e-invoicing (Fawtara): Are you ready for implementation?

Implementation dates and practical readiness steps

The Sultanate of Oman is introducing mandatory e-invoicing under Decision No. 189/2026. Taxpayers should understand their implementation date and begin preparing their processes, data and systems.

Oman e-invoicing (Fawtara)

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This guide provides:

The mandatory implementation timeline and Oman Tax Authority (OTA) implementation checker.
The key steps taxpayers should take to prepare for e-invoicing.
How Deloitte can support your e-invoicing implementation, including InTax by Deloitte as your Accredited Service Provider (ASP).

Mandatory implementation timeline

If a taxpayer’s annual supplies falls below OMR 5 million in a later year, the e-invoicing obligation will continue to apply.

August 2026

Pilot rollout for approx. 150 selected companies

1 April 2027

Total value of supplies exceeds OMR 5 million based on supplies from 1 April 2026 to 31 March 2027 or expected supplies for the year after

1 October 2027

Total value of supplies does not exceed OMR 5 million based on supplies from 1 April 2026 to 31 March 2027 and expected supplies for the year after

Your e-invoicing readiness journey: we can assist in the implementation journey with a phased approach

Assess transaction scope

Identify which transactions are subject to e-invoicing

Define the required data

Determine the data fields required to populate a compliant e-invoice

Update master data and processes

Create new data fields and update master data, accounts receivable and related processes

Create organizational awareness

Inform relevant teams about the new e-invoicing requirements and their responsibilities

Configure and test systems

Build the requirements into your systems, test the configuration and update related processes

Select an approved ASP

Such as InTax by Deloitte, to interface your systems with the OTA

Build and test the integration

Complete the technical integration and end-to-end testing

Go live

Start issuing e-invoicing and monitor the process

Yes

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Oman e-invoicing (Fawtara): Are you ready for implementation?