Oman

This article was last updated on 13 August 2026 to reflect the official enactment of Oman's mandatory electronic invoicing framework under the Fawtara programme, formalised on 3 August 2026 via Tax Authority Decision No. 189/2026. It incorporates the legally binding Executive Regulation amendments, the mandatory implementation roadmap starting 1 April 2027, the licensing framework for Accredited Service Providers, and the finalised technical specifications and Data Dictionary supporting the 5-corner continuous transaction controls (CTC) model.

Introduction & digital tax strategy

Oman is introducing a nationwide electronic invoicing framework through the Fawtara programme, a government-led initiative designed to digitalise invoice exchange, improve VAT compliance and modernise the country's tax administration. Its official portal serves as the central hub for implementing and managing the mandate. The programme forms part of Oman's wider digital transformation strategy and, following an initial pilot phase in the second half of 2026, introduces mandatory electronic invoicing through a phased implementation beginning in April 2027.

The new framework will be administered by the Oman Tax Authority (OTA) and adopt a 5-corner continuous transaction controls (CTC) model, allowing invoices to be exchanged between businesses through accredited service providers while enabling real-time or near real-time reporting to the tax authority.

Unlike some traditional electronic invoicing systems that simply replace paper invoices with PDFs, the Fawtara framework requires structured electronic invoices that comply with the technical specifications published by the OTA. To support implementation, the authority has released technical documentation, including a Data Dictionary, implementation guidance and technical specifications for businesses and solution providers.

This guide explains Oman's electronic invoicing framework, including the legal background, implementation timeline, technical architecture, invoice exchange model, technical requirements and the practical steps in-scope businesses should take to prepare for compliance.

Understanding Oman's e-invoicing reform

Oman is modernising its tax administration through the introduction of Fawtara, a nationwide electronic invoicing programme led by the Oman Tax Authority (OTA). The initiative forms part of the country's broader digital transformation strategy and aims to replace traditional invoicing processes with a standardised electronic framework that supports greater efficiency, transparency and VAT compliance.

Unlike paper invoices or unstructured PDF documents, the new framework requires businesses to exchange structured electronic invoices in accordance with the technical specifications published by the OTA. The system is expected to improve invoice automation while providing the tax authority with greater visibility over commercial transactions.

A phased implementation

Rather than introducing the mandate all at once, Oman intends to implement electronic invoicing through a phased rollout beginning with a pilot in the second half of 2026, and mandatory implementation phases commencing in April 2027.
This phased approach allows businesses, software providers, and the tax authority to prepare their systems and processes, and to test and integrate their systems via Accredited Service Providers (ASPs) before full enforcement takes effect.

Objectives of the Fawtara programme

The introduction of electronic invoicing is intended to support several strategic objectives, including:

• Modernising Oman's invoicing ecosystem.

• Increasing transparency in commercial transactions.

• Improving VAT compliance and tax administration.

• Reducing manual processing and administrative burdens.

• Supporting greater automation through structured electronic invoices.

• Establishing an interoperable digital invoicing framework aligned with international best practices.

A continuous transaction controls (CTC) model

Oman plans to implement electronic invoicing using a 5-corner Continuous Transaction Controls (CTC) model.

Under this approach, businesses exchange invoices through accredited service providers, while invoice data is simultaneously transmitted to the Oman Tax Authority as part of the compliance process. This enables the authority to receive invoice information electronically without requiring a fully centralised government exchange platform.

Official legal and technical baseline

The legal framework for mandatory electronic invoicing was officially enacted into law under Tax Authority Decision No. 189/2026, which amended the VAT Executive Regulations.

To support businesses and software integration, the Oman Tax Authority provides official technical documentation, including the Fawtara Data Dictionary (UBL 2.1 / PINT-OM), technical specifications, business validation rules, and ASP integration guidelines. These documents establish the mandatory baseline for system readiness, ERP mapping, and compliance ahead of the 2027 enforcement deadlines.

Oman e-invoicing implementation timeline

Oman is introducing mandatory electronic invoicing through a phased implementation under the Fawtara programme. Rather than launching the framework in a single step, the Oman Tax Authority (OTA) is following a staged approach that includes public consultation, the publication of draft technical documentation and a gradual rollout of the mandate.

Key implementation dates

Development of the Fawtara programme

Initial publication of draft technical documentation

As part of the early preparation for mandatory electronic invoicing, the Oman Tax Authority initially published draft technical documentation describing the proposed 5-corner Continuous Transaction Control (CTC) framework.

This early package, comprising draft implementation guidance, technical specifications, and a Data Dictionary, provided businesses and software providers with an early understanding of the proposed electronic invoicing system architecture and data requirements.

Consultation, legal enactment, and system preparation

Following extensive consultation with businesses, technology providers, and other stakeholders, the OTA refined the framework and formally enacted it into law. With the issuance of Tax Authority Decision No. 189/2026 in August 2026, the preliminary specifications were codified into active operational standards.

The authority subsequently launched portal integration tools, published full operational user manuals (such as the ASP and taxpayer association management guides), and opened the official accreditation process for e-invoicing service providers.
This transition from consultation to active onboarding enables organisations and software vendors to map their ERP data schemas, perform gap analyses, and test connectivity prior to enforcement.

Mandatory phased rollout

The Fawtara programme’s implementation is officially mandated by Decision No. 189/2026 issued by the authorities on 3 August 2026. The rollout is staged in two phases based on annual taxable supply thresholds, preceded by a voluntary pilot program starting in August 2026.

Legal framework

Oman's electronic invoicing framework is established under the Fawtara programme, led by the Oman Tax Authority (OTA). The legal and operational foundation for mandatory electronic invoicing was officially enacted into law on 3 August 2026 through Tax Authority Decision No. 189/2026 (amending the Executive Regulations of the Value Added Tax Law originally issued under Decision No. 53/2021).

The legal framework builds upon earlier groundwork laid by Decision No. 456/2022 amending some provisions of the Executive Regulations of the VAT Law (which first defined the "Electronic Tax Invoice" and set the statutory 15-day issuance window). It establishes the legal and operational framework for mandatory electronic invoicing and establishes a binding Continuous Transaction Control (CTC) model.

The principal legal and technical elements governing the framework include:

Key legislative updates (Decision No. 189/2026)

Decision No. 189/2026 introduces several critical amendments to the VAT Executive Regulations that codify e-invoicing into Omani law. These August 2026 amendments can be categorised into revisions of existing articles and the introduction of new legal provisions.

Revisions to existing VAT Executive Regulations:

• Mandatory electronic tax invoices (Article 143): Article 143 of the Executive Regulations has been completely substituted. Taxable persons are now required to issue tax invoices in an approved, secured electronic format with a unique identification number for all supplies, deemed supplies, and advance payments within a maximum of 15 days from the date of supply. The invoice issuer must ensure the source authenticity, content integrity, and continuous legibility of the invoice throughout its mandatory retention period.

• Simplified tax invoices (Article 146): The revised paragraph 2 confirms that simplified tax invoices are subject to the same electronic formatting and 15-day issuance deadlines set out in Article 143.

New legal provisions:

• Accredited Service Providers (Article 143 bis): Establishes that the Tax Authority will officially publish and license accredited companies authorised to offer approved electronic tax invoicing services.

• System security & continuity (Article 143 bis 1): Obligates taxpayers to implement technical measures protecting their electronic systems from unauthorised access or breaches, establish emergency protocols for technical outages, and maintain data recovery mechanisms to ensure uninterrupted operations.

• Temporary exemptions (Article 143 bis 2): Grants the Tax Authority Chairman the power to allow temporary exemptions from e-invoicing upon formal request, provided the taxpayer continues to file VAT returns and pay taxes on time.

• Additional data requirements (Article 147, Item 11): Empowers the Tax Authority to specify additional mandatory data elements to be included on electronic tax invoices as needed.

These legislative additions have officially transitioned e-invoicing from a proposed technical initiative into a binding legal obligation across all business sectors in Oman.

Fawtara e-invoicing implementation documents

As part of the implementation programme, the Oman Tax Authority has published a series of technical specifications and operational guidelines defining the 5-corner CTC model, also known as the Decentralised CTC and Exchange (DCTCE) model.

These documents include:

• Implementation guidance: Operational procedures and guidelines for taxpayers and service providers.

• Technical specifications: Technical standards for system architecture, secure electronic formatting, data encryption, and system continuity.

• Data Dictionary: The standard data dictionary (UBL 2.1-aligned) specifying mandatory and conditional fields, business terms, business rules, and code lists required for compliant e-invoices.

• Supporting technical documentation: Specifications describing the 5-corner invoice exchange architecture, accredited service provider (ASP) integration requirements, and system security rules.

Together, these documents define the technical and operational requirements for the electronic invoicing system and provide the basis for software development, ERP integration, and business preparation ahead of the phased rollout.

Official source: Oman Tax Authority (OTA).

Enforceable implementation roadmap

Under Article 3 of Decision No. 189/2026, mandatory electronic invoicing will be legally enforced according to a phased timeline based on annual turnover:

• 1 April 2027: Mandatory for taxpayers whose annual taxable supplies exceed OMR 5 million.

• 1 October 2027: Mandatory for all remaining taxpayers whose annual taxable supplies do not exceed OMR 5 million.

This statutory roadmap formally binds taxpayers to the Fawtara regime, making early alignment with an Accredited Service Provider (ASP) and system testing essential prior to the applicable enforcement deadlines.

Official source: Oman Tax Authority (OTA) / Official Gazette No. 1660.

Authorities

Oman's electronic invoicing framework is developed and implemented under the leadership of the Oman Tax Authority (OTA) as part of the Fawtara programme. With the legal framework formally enacted under Decision No. 189/2026, the OTA is responsible for establishing and subsequently enforcing the legal, technical and operational requirements for mandatory electronic invoicing.

Oman Tax Authority (OTA)

The Oman Tax Authority (هيئة الضرائب) is the government authority responsible for the development, implementation and oversight of Oman's electronic invoicing framework.

As the competent authority, the OTA is leading the Fawtara programme and is responsible for:

• Developing and enacting the legal framework for mandatory electronic invoicing.

• Publishing technical specifications and implementation guidance.

• Defining the Data Dictionary and interoperability requirements.

• Accrediting service providers participating in the framework under Article 143 bis of the Executive Regulations of the Value Added Tax Law.

• Overseeing compliance with the electronic invoicing mandate once implemented.

Fawtara programme

Fawtara is the national programme through which the OTA implements mandatory electronic invoicing. The programme introduces the technical architecture, implementation roadmap and compliance framework that will govern electronic invoice exchange in Oman. Its official portal acts as the primary gateway for the OTA to publish technical standards, accredit service providers, and manage the compliance roadmap.

Accredited Service Providers (ASPs)

Under Oman's 5-corner Continuous Transaction Controls (CTC) (or DCTCE) model, businesses exchange electronic invoices through Accredited Service Providers (ASPs).

These licensed providers connect businesses to the electronic invoicing network and facilitate the secure exchange of structured electronic invoices while supporting communication with the Oman Tax Authority as part of the DCTCE model. The accreditation framework and detailed technical requirements are regulated directly by the OTA.

Scope of the mandate

Oman's electronic invoicing framework is intended to introduce mandatory electronic invoicing for businesses through the Fawtara programme. Formally enacted under Tax Authority Decision No. 189/2026, the mandate is implemented in two statutory phases based on annual turnover thresholds, with the Oman Tax Authority (OTA) gradually expanding the scope of the mandate as the framework is rolled out.

Who is affected?

The electronic invoicing framework applies to all taxable persons registered for VAT in Oman. Article 3 of Decision No. 189/2026 establishes the binding implementation phases based on annual taxable supply thresholds, with the first phase (effective from 1 April 2027) applying to taxable persons with annual taxable supplies exceeding OMR 5 million, and the second (1 October 2027) to all remaining taxable persons with annual taxable supplies below OMR 5 million.

Which transactions are in scope?

Under amended Article 143 of the VAT Executive Regulations, businesses must issue approved, secured electronic tax invoices for the following transaction types:

• Standard B2B and B2C supplies: Commercial supplies of goods and services, including supplies made to non-taxable persons or for personal use.

• Deemed supplies: Any transactions categorised as deemed supplies under the VAT Law.

• Advance payments: Partial or full payments received prior to the actual date of supply.

• Simplified tax invoices: Retail and low-value B2C transactions (subject to Article 146).

All electronic invoices must be issued within a maximum of 15 days from the date of the supply or event and transmitted securely via Accredited Service Providers (ASPs) under the 5-corner CTC model.

Scope overview

Oman’s e-invoicing requirements

Under Oman's Fawtara framework, businesses within the scope of the mandate are required to issue and receive structured electronic invoices in accordance with the technical and legal requirements established by the Oman Tax Authority (OTA).

Rather than relying on paper invoices or unstructured PDF documents, the framework introduces a standardised electronic invoicing environment designed to support automation, interoperability and improved VAT compliance. The detailed requirements are set out in the implementation guidance, technical specifications and Data Dictionary published by the OTA.

Structured electronic invoices

Businesses are required to generate invoices as structured electronic documents that comply with the technical specifications defined by the OTA.

Per revised Article 143 of the Executive Regulations of the Value Added Tax Law, all electronic tax invoices, including simplified tax invoices (per the updated Article 146), must be issued within a maximum of 15 days from the date of the event or supply. Issuers must ensure continuous legibility and authenticity of the invoice data until the end of the mandatory retention period.

Structured invoice data enables electronic validation, automated processing and seamless exchange between trading partners while supporting the reporting requirements of the Fawtara programme.

Exchange through Accredited Service Providers

The framework is based on a 5-corner Continuous Transaction Controls (CTC) model, under which businesses exchange invoices through Accredited Service Providers (ASPs).

These providers facilitate the secure transmission of invoice data between trading partners while also supporting the communication of required information to the Oman Tax Authority.

Compliance with OTA technical specifications

Electronic invoices need to comply with the technical requirements published by the OTA, including:

• Technical specifications.

• Implementation guidance.

• Data Dictionary.

Together, these documents define the structure, content and exchange requirements for electronic invoices within the Fawtara ecosystem.

Integration with business systems

Businesses are expected to integrate their ERP, accounting or invoicing software with an Accredited Service Provider to enable compliant electronic invoice exchange.

This approach will allow organisations to automate invoice generation, transmission and receipt while ensuring compliance with the technical requirements established by the OTA.

Preparing for implementation

With the legal framework formally enacted under Decision No. 189/2026, businesses must transition from general monitoring to active system preparation.

To ensure compliance ahead of their mandatory enforcement date, organisations should:

• Determine phase alignment: Confirm whether the business falls under Phase 1 (April 2027) or Phase 2 (October 2027) based on the OMR 5 million annual taxable supply threshold.

• Perform ERP & schema gap analysis: Review internal billing software against the Fawtara Data Dictionary (UBL 2.1 / PINT-OM) to ensure all mandatory business terms, conditional fields, and tax calculation logic are supported.

• Select an Accredited Service Provider (ASP): Partner with an OTA-accredited service provider to manage secure XML generation, validation, and automated transmission under the 5-corner CTC model.

• Audit system security & data recovery: Align internal IT infrastructure with the system security, breach prevention, and disaster recovery standards required under Article 143 bis 1.

Early technical alignment and pilot testing with licensed ASPs will help organisations ensure uninterrupted business operations prior to their statutory go-live deadline.

Technical Architecture

Oman's electronic invoicing framework is based on a 5-corner Continuous Transaction Controls (CTC) model, designed to facilitate the secure exchange of structured electronic invoices while providing the Oman Tax Authority (OTA) with visibility over invoice data.

Rather than exchanging invoices directly between trading partners or through a central government platform, businesses communicate via Accredited Service Providers (ASPs). These providers enable the transmission of electronic invoices between suppliers and buyers while also reporting the required invoice information to the OTA as part of the compliance process.

A 5-corner CTC model

Oman has formally adopted the Decentralised CTC and Exchange (DCTCE) model, structured as a 5-corner framework. Unlike centralised clearance models that require governments to “block” or validate invoices in real-time, the DCTCE model is designed to align commercial interests (full business automation) with fiscal interests (compliance and fraud prevention). By leveraging a decentralised network of Accredited Service Providers (ASPs), the Tax Authority connects to the ecosystem to extract relevant VAT information in real or near-real time without impeding the flow of business documents between trading partners.

This approach - combining decentralised invoice exchange with Continuous Transaction Controls - enables businesses to retain flexibility while supporting greater transparency and digital tax administration.

In this architecture, five participants (commonly also referred to as “corners”) are involved in the electronic invoice exchange process:

1. Corner 1: Supplier - Creates and issues the electronic invoice.

2. Corner 2: Supplier's Accredited Service Provider (ASP) - Validates and transmits the invoice.

3. Corner 3: Buyer's Accredited Service Provider (ASP) - Receives and delivers the invoice to the buyer.

4. Corner 4: Buyer - Receives and processes the electronic invoice.

5. Corner 5: Oman Tax Authority (OTA) - Receives the required invoice information as part of the Continuous Transaction Controls framework.

This model offers distinct operational advantages over centralised platforms:

• Non-blocking workflow: The OTA extracts data “on top” of the exchange. The invoice flow between supplier and buyer is not interrupted by government validation, ensuring continuous business operations.

• Greater interoperability between businesses: By leveraging a standardised framework (UBL 2.1) across a decentralised network, businesses using different ERP and accounting systems can exchange data seamlessly without needing custom point-to-point integrations.

• Full business automation: The model enables the automation of the entire supply chain, including purchase orders and delivery notes, rather than limiting digital exchange solely to the tax invoice.

• Reduced administrative burden: Replacing manual data entry with structured data eliminates common errors, facilitates faster invoice reconciliation, and significantly reduces the time spent on document processing.

To explore how this 5-corner architecture compares to other international frameworks, such as central clearance or Real-Time Reporting (RTR) models, please read our detailed article: The e-invoicing maze: Navigating global compliance models.

The role of Accredited Service Providers

Accredited Service Providers play a central role in the Omani framework.

Rather than connecting directly to the Oman Tax Authority, businesses connect through an ASP that has been accredited by the OTA. These providers:

• Facilitate the secure exchange of structured electronic invoices.

• Validate invoice data in accordance with the technical specifications.

• Support interoperability between trading partners.

• Transmit the required invoice information to the OTA as part of the CTC model.

Supporting interoperability

The architecture is intended to provide a scalable and interoperable framework that allows businesses using different ERP and accounting systems to exchange invoices electronically.

By standardising invoice exchange through accredited providers and common technical specifications, the framework aims to improve automation, reduce manual processing and support efficient VAT administration.

How Oman's 5-corner e-invoicing model works

As outlined above, under the Fawtara framework, electronic invoices are exchanged using a 5-corner Continuous Transaction Controls (CTC) model. This means that, rather than sending invoices directly between suppliers and buyers, businesses (“Corners 1 & 4”) exchange structured electronic invoices through Accredited Service Providers (ASPs - “Corner 2 & 3”), while the Oman Tax Authority (OTA - “Corner 5”) receives the required invoice information as part of the compliance process.

This approach is intended to provide secure and interoperable invoice exchange while supporting automated tax reporting and greater transparency.

Step 1 - The supplier creates the electronic invoice

The supplier (Corner 1) generates a structured electronic invoice using its ERP, accounting or invoicing software.
The invoice must comply with the technical specifications and data requirements established by the Oman Tax Authority, ensuring that it can be processed electronically throughout the Fawtara ecosystem.

Step 2 - The invoice is sent to the supplier's Accredited Service Provider

The supplier transmits the invoice to its chosen Accredited Service Provider (ASP).
The ASP (Corner 2) performs the required technical processing and prepares the invoice for secure exchange in accordance with the Fawtara framework.

Step 3 - Invoice information is reported to the Oman Tax Authority

As part of the 5-corner CTC model, the required invoice information is transmitted to the Oman Tax Authority (OTA) through the accredited provider.
This enables the OTA (Corner 5) to receive electronic invoice data as part of the compliance process while allowing the invoice exchange itself to remain decentralised through the accredited provider network.

Step 4 - The invoice is delivered to the buyer

The supplier's ASP securely exchanges the electronic invoice with the buyer's ASP (Corner 3), which then delivers it to the buyer.
This ensures interoperability between trading partners, even where they use different ERP or accounting systems.

Step 5 - The buyer processes the invoice

The buyer (Corner 4) receives the structured electronic invoice and processes it using its internal business systems.
Because the invoice is exchanged as structured data, businesses can automate invoice validation, accounting workflows and financial processing while reducing manual intervention.

Key operational advantages of the 5-corner exchange

By utilising the 5-corner exchange process to transmit data between trading partners and the OTA, the framework delivers clear operational improvements over traditional invoicing:

• Secure exchange of structured electronic invoices: Validates and protects the integrity of invoice data from issuance to receipt, providing a robust, tamper-proof record.

• Reduced manual processing and improved automation: Minimises the need for manual intervention by automating validation, accounting workflows, and financial processing at the user level.

• Enhanced transparency for VAT administration: Provides a real-time, audit-ready trail of commercial transactions that satisfies OTA requirements without complex filings.

• Efficient electronic reporting: Automates the reporting mechanism to the OTA, eliminating the need to manually extract or upload separate tax reports.

• Scalable compliance: A standardised, structured framework that allows the OTA to scale the mandate across the entire business landscape without performance degradation, thereby supporting Oman’s long-term digital transformation strategy.

What an Oman e-invoice looks like

Under the Fawtara framework, an electronic invoice is an XML-based structured electronic document aligned with the UBL 2.1 standard (PINT-OM specification). It contains machine-readable data and complies with the technical and legal requirements enacted by the Oman Tax Authority (OTA) under Decision No. 189/2026.

Rather than relying on paper invoices or PDF documents, businesses must exchange structured invoice data that enables automated validation, processing and reporting. The required invoice structure is defined through the OTA's official Data Dictionary and accompanying technical specifications.

The Data Dictionary

To support implementation, the Oman Tax Authority has published a Data Dictionary, which defines the mandatory, conditional, and optional data elements required in electronic invoices.

The Data Dictionary provides businesses and software providers with a common reference for developing compliant invoicing systems, mapping ERP fields, and ensuring consistent electronic invoice exchange across the Fawtara ecosystem.

Invoice information

In accordance with Articles 143, 146, and 147 of the amended VAT Executive Regulations, electronic tax invoices must contain standardised business terms, including:

• Unique identification: A system-generated Unique Invoice Identifier (UUID) assigned to every invoice.

• Supplier & buyer identification: Full legal names, addresses, Commercial Registration (CR) numbers, and VAT identification numbers.

• Invoice metadata: Sequential invoice number, issue date/time, and invoice type (e.g., Standard Tax Invoice vs. Simplified Tax Invoice).

• Supply details: Detailed line-item descriptions of goods or services, quantities, unit prices, and date of supply.

• Tax & total calculations: Applicable VAT rates (5%, 0%, or Exempt), line-level tax totals, total taxable base, total VAT amount due, and net payable amount.

• Simplified invoice requirements (B2C): A cryptographic QR Code embedded on simplified tax invoices to verify invoice authenticity and contents.

• Additional data: Any supplementary data fields specified by the Tax Authority under Article 147 (Item 11).

Structured data for automation

Using structured invoice data enables businesses to:

• Automate invoice processing.

• Reduce manual data entry.

• Improve invoice accuracy.

• Integrate invoices with ERP and accounting systems.

• Support electronic reporting and VAT compliance.

• Exchange invoices efficiently through Accredited Service Providers.

Technical validation

Before invoices are exchanged through the Fawtara framework, they must comply with the strict business rules and validation checks established by the Oman Tax Authority.
The combination of the Data Dictionary, technical specifications, and implementation guidance provides a common framework that ensures invoice consistency, interoperability, data integrity, and reliable electronic processing across the network.

Accepted invoice formats

Under the Fawtara framework, electronic invoices must be created and exchanged in structured, machine-readable digital formats that comply with the PINT Oman (Pint-OM) technical specifications published by the Oman Tax Authority (OTA).

The technical specification package, including the Data Dictionary, XML schemas, and Oman Schematron validation rules, defines the mandatory data payload, enabling automated validation, business processing and document exchange, and reporting to the OTA through the Fawtara ecosystem.

Structured electronic invoices vs. unstructured formats

Unlike paper invoices or unstructured electronic files (such a plain PDFs, Word/Excel spreadsheets, or scanned images), electronic invoices under the Fawtara framework must contain structured, machine-readable data that can be validated and processed automatically by business systems, Accredited Service Providers, and the OTA. Unstructured formats are strictly invalid as tax invoices for in-scope transactions once a taxpayer's phase begins.

The officially accepted electronic formats are:

• XML (UBL 2.1 syntax): The primary mandatory structured format for data exchange across the Peppol network and for reporting the Tax Data Document (TDD) to the OTA.

• PDF/A-3 (hybrid format): An accepted format combining a human-readable visual PDF with the compliant UBL 2.1 XML data embedded directly inside the file.

Using structured invoice data supports:

• Automated invoice processing and ledger posting.

• Real-time electronic validation and error checking.

• Greater technical interoperability across international trading partners via the Peppol network.

• Improved VAT compliance and audit readiness.

• Direct, automated tax data reporting to the Oman Tax Authority.

Technical specifications & standard frameworks

The OTA's technical framework aligns with international standards while incorporating Omani tax requirements.

This documentation includes:

• PINT Oman specification (PINT-OM): The localised adaptation of the Peppol International (PINT) standard defining transaction schemas (PINT OM Billing, PINT OM Self-Billing, and Tax Data Documents).

• The Fawtara Data Dictionary: Specifies mandatory, conditional, and optional business terms (BTs) aligned with UBL 2.1.

• Oman schematron business rules: Automated validation rules applied by Accredited Service Providers (ASPs) before an invoice is issued or cleared.

System updates & compliance maintenance

As the Fawtara programme progresses towards implementation, the Oman Tax Authority and OpenPeppol maintain these specifications through versioned releases.
Businesses and software providers must monitor official OTA publications to ensure that their systems remain aligned with the latest technical requirements.

Future developments

Oman's electronic invoicing framework has entered its official implementation phase following the enactment of Tax Authority Decision No. 189/2026. While the Oman Tax Authority (OTA) continues to accredit service providers and release operational portal guides, the legal foundation for mandatory e-invoicing is now formally in place. As the framework progresses, businesses must prepare for the binding statutory deadlines.

Enactment of the legal framework

On 3 August 2026, the OTA officially enacted the e-invoicing mandate by amending the VAT Executive Regulations under Decision No. 189/2026. This legal instrument establishes the mandatory electronic invoicing framework, defines compliance rules (including the 15-day invoice issuance window), regulates Accredited Service Providers (ASPs), and outlines technical and security obligations for taxpayers.

Finalisation of technical specifications and integration rules

The official technical specifications, Data Dictionary (UBL 2.1 / PINT-OM), and validation rules provide the technical baseline for ERP mapping and system development. These specifications are implemented through Accredited Service Providers (ASPs) and developer packages provided by the OTA, giving taxpayers the precise mapping criteria needed for compliance..

Phased implementation of the Fawtara programme

Mandatory implementation will take place in 2027 in two distinct statutory waves:

1. 1 April 2027: Mandatory for taxpayers with annual taxable supplies exceeding OMR 5 million.

2. 1 October 2027: Mandatory for all remaining taxpayers with annual taxable supplies below OMR 5 million.

The Oman Tax Authority continues to publish portal user guides and register Accredited Service Providers as the onboarding process progresses.

Continued engagement with businesses

The OTA continues to maintain a collaborative approach by accrediting solution providers and engaging with businesses and solution providers during the onboarding phase of the framework.
This ongoing support is intended to facilitate a smooth transition to mandatory electronic invoicing while allowing stakeholders to test their systems with licensed ASPs ahead of their mandatory deadlines.

Preparing for a digital invoicing ecosystem

As the Fawtara programme moves towards its 2027 enforcement dates, businesses must actively assess their technical readiness.
Organisations that begin preparing early by performing gap analyses, selecting an Accredited Service Provider (ASP), and updating their ERP data schemas will be better positioned to comply once their respective phase enters into force.

Penalties for e-invoicing non-compliance

Decision No. 189/2026 does not introduce a separate list of fines; instead, it amends Articles 143 and 146 of the VAT Executive Regulations to establish that only structured electronic invoices (UBL 2.1 XML / PDF/A-3) routed via an Accredited Service Provider (ASP) constitute legally valid tax invoices.

Once a business reaches its mandatory phase deadline (1 April 2027 or 1 October 2027), issuing paper invoices, plain PDFs, or failing to meet technical specifications triggers the penalty provisions under the general VAT Law and Executive Regulations:

• Issuing paper or unstructured invoices: Issuing paper invoices, scanned images, or unapproved PDFs after the mandatory deadline is treated legally as a failure to issue a valid tax invoice. This attracts an administrative fine ranging from OMR 500 to OMR 5,000 under Article 202 of the Executive Regulations, or OMR 1,000 to OMR 10,000 (plus potential imprisonment of 2 months to 1 year) under Article 100 of the VAT Law for deliberate non-compliance.

• Loss of input VAT deductions (buyer risk): Input VAT claimed on paper invoices or unapproved PDFs issued by an in-scope supplier will be disallowed by the Oman Tax Authority during audit, exposing the buyer to tax reassessments and penalties of 1% to 25% on understated tax.

• Missing technical data or schema failures: Invoices that fail technical validation, such as missing a Unique Invoice Identifier (UUID), cryptographic signature, or required OMR fields, are rejected as invalid tax invoices, subjecting the taxpayer to fines between OMR 500 and OMR 10,000.

• Non-compliant data archiving: Failing to retain electronic invoices in their original structured XML format for the statutory 10-year retention period carries fines ranging from OMR 1,000 to OMR 10,000.

• System security violations (Article 143 bis 1): Failure to maintain required system security controls, protection against unauthorised access, or emergency data recovery mechanisms can result in system suspension and associated VAT compliance penalties.

Official source: Royal Decree No. 121/2020 (VAT Law, Articles 100–101) & Tax Authority Decision No. 189/2026.

To mitigate non-compliance risks prior to their mandatory phase deadline (1 April 2027 or 1 October 2027), organisations should ensure early system integration with a licensed Accredited Service Provider (ASP) and conduct thorough UBL 2.1 schema validation.

How businesses can prepare

With the formal enactment of Decision No. 189/2026, businesses must actively prepare for mandatory electronic invoicing under the Fawtara programme. The publication of the active Fawtara Data Dictionary (UBL 2.1 / PINT-OM) and the opening of Accredited Service Provider (ASP) onboarding provide organisations with the concrete technical foundation needed to achieve compliance ahead of their statutory phase deadline.

Review your invoicing processes and determine your wave

Businesses should evaluate their current invoicing workflows to determine whether they can generate, transmit, and archive structured electronic invoices. This includes identifying manual processes, reviewing internal controls and assessing how invoices are created, transmitted and received.

Key actions include:

• Verifying your mandatory go-live date: Confirm your implementation wave using the OTA portal based on the OMR 5 million annual taxable supply threshold (1 April 2027 for supplies > OMR 5M; 1 October 2027 for supplies ≤ OMR 5M).

• Mapping invoicing touchpoints: Identify all entry points across order-to-cash and procure-to-pay cycles, reviewing internal controls and manual invoice creation processes.

Assess your technology readiness and master data

Organisations should review their ERP, accounting and invoicing systems to align with the technical requirements of the Fawtara framework.

This may include:

• Schema & field mapping: Ensuring software can generate structured XML files in accordance with the Fawtara Data Dictionary (UBL 2.1 / PINT-OM).

• Master data clean-up: Remedying customer and vendor master data to ensure mandatory fields, such as legal names, addresses, Commercial Registration (CR) numbers, and VAT IDs, are accurate.

• B2C QR code capability: Enabling point-of-sale (POS) and retail billing systems to generate compliant cryptographic QR codes on simplified invoices.

• Connecting to an Accredited Service Provider (ASP): Establishing secure API pipelines to transmit invoice data to a licensed ASP connected to the central Fawtara network.

• Automating invoice validation and exchange: Implementing automated validation rules to catch missing fields or calculation errors prior to dispatch and enabling system-to-system invoice exchange under the 5-corner model.

Review the technical documentation and portal resources

Organisations should utilise the active technical specifications, user manuals, and developer resources published by the Oman Tax Authority:

• Fawtara Data Dictionary & PINT-OM specifications: Defining mandatory business terms, conditional logic, and code lists.

• Validation rules (Schematron): Establishing automated checks for tax amounts, totals, and invoice hashing.

• OTA portal user manuals: Guiding portal navigation, ASP linkage, and participant registration.

Reviewing these documents early will help businesses understand the technical and business requirements and identify any necessary system and process changes before the mandate takes effect for them.

Prepare internal teams and operational workflows

The transition to electronic invoicing affects more than technology - it has a cross-functional impact.
Finance, tax, accounting, procurement, legal, and IT teams should understand:

• The overall Fawtara framework.

• The statutory 15-day invoice issuance limit under Article 143.

• The 5-corner CTC model and real-time validation workflows.

• System security, access controls, and emergency continuity rules required under Article 143 bis 1.

• Statutory retention rules requiring secure electronic archiving for 10 years (or 15 years for real estate).

Providing training in advance will help reduce disruption during implementation.

Monitor official updates and administrative portals

As the rollout progresses towards enforcement, businesses should regularly monitor announcements from the Oman Tax Authority for:

• Licensed ASP directory updates: Newly accredited service providers authorised by the OTA under Article 143 bis.

• Operational portal manuals: Detailed user guides published for portal navigation, association management, and rollout period lookup tools.

• Technical version patches: Updates to the PINT-OM Schematron validation rules, code lists, or API specifications.

• Pilot phase insights: Key takeaways and edge-case operational learnings from the active voluntary pilot.

Partner with a licensed Accredited Service Provider (ASP)

Businesses should select and partner with an OTA-accredited service provider (ASP) licensed under Article 143 bis.

An experienced ASP helps organisations:

• Perform system gap analysis and automate ERP field mapping.

• Handle UBL 2.1 XML conversion, digital signing, and automated transmission via the Peppol network.

• Validate invoices against OTA Schematron rules prior to issuance.

• Conduct end-to-end sandbox testing ahead of mandatory enforcement.

Conclusion 

Oman is taking an important step towards the digitalisation of its tax and invoicing ecosystem through the introduction of the Fawtara electronic invoicing programme. Led by the Oman Tax Authority (OTA), the initiative is establishing a modern electronic invoicing framework based on a 5-corner Continuous Transaction Controls (CTC) model, enabling businesses to exchange structured electronic invoices while supporting greater VAT transparency and automation.

With the legal framework officially enacted under Tax Authority Decision No. 189/2026, mandatory e-invoicing is now a binding obligation under Omani law. Supported by the active Fawtara Data Dictionary, PINT-OM technical specifications, and the opening of ASP accreditation, organisations have a clear statutory roadmap leading to enforcement on 1 April 2027 (annual supplies > OMR 5 million) and 1 October 2027 (annual supplies ≤ OMR 5 million).

As the Oman Tax Authority progresses with the voluntary pilot and ASP onboarding, businesses should actively prepare for their respective enforcement dates. Early preparation, supported by appropriate technology and a clear understanding of the Fawtara framework, will help organisations achieve compliance while benefiting from greater automation, improved operational efficiency and streamlined tax reporting.