Oman has moved from e-invoicing planning into a binding legal implementation phase. On 3 August 2026, the Oman Tax Authority (OTA) issued Decision No. 189/2026, amending the Executive Regulations of the Value Added Tax Law. The decision was published in Official Gazette No. 1660 on 9 August 2026 and introduces mandatory electronic tax invoicing through two statutory implementation dates.
Under the new legal timeline, taxable persons whose annual supplies exceed OMR 5 million must comply from 1 April 2027. Taxable persons whose annual supplies do not exceed OMR 5 million must comply from 1 October 2027.
The technical framework has also matured. Oman uses a Peppol-based five-corner operating model, a centralised OTA SMP and accredited service providers. The final PINT OM Billing, PINT OM Self-Billing and Oman Tax Data Document (TDD) specifications, version 1.0.1, were released by OpenPeppol on 29 July 2026.
For taxpayers, Oman e-invoicing should now be treated as an active compliance project. Businesses should determine their statutory date, select and integrate with an accredited service provider, map Oman-specific invoice and tax-reporting requirements, and prepare their processes well before go-live.
What is E-Invoicing in Oman?
In Oman, e-invoicing means issuing tax invoices in an approved and secure electronic format and processing them through the Fawtara framework. Decision No. 189/2026 now requires taxable persons, from their applicable implementation date, to issue tax invoices electronically in a manner that protects invoice integrity and enables storage under a unique number for each invoice.
The Fawtara operating model connects the seller, the seller’s accredited service provider, the buyer’s service provider, the buyer and the Oman Tax Authority. In practical terms, the structured invoice is validated and exchanged through the Peppol-based network, while the relevant tax data is reported separately to the OTA through the Oman Tax Data Document.
A paper invoice, an unstructured PDF or an image sent by email is not, by itself, a compliant Fawtara e-invoice. The structured electronic data is the core compliance record, while a human-readable representation may still be used for customer display and specific B2C requirements.
What is B2B e-invoicing in Oman?
For B2B transactions, the OTA’s operational guidance requires real-time submission. Businesses should therefore design for continuous validation, exchange and tax reporting rather than periodic or end-of-day uploads. In the five-corner model, the seller and buyer connect through accredited service providers, while tax data is transmitted to the OTA through the TDD flow.
The legal invoice-issuance rule and the technical transmission rule should be distinguished. Amended Article 143 of the VAT Executive Regulations requires the tax invoice to be issued no later than 15 days from the relevant triggering event, while the Fawtara operational guidance requires B2B e-invoice submission in real time.
The technical standard is PINT OM Billing version 1.0.1 and used for standard invoices and credit notes, with UBL/XML as the structured syntax and Oman-specific validation rules applied through the Peppol framework.
What is B2G e-invoicing in Oman?
Oman continues to identify government institutions and entities as part of the Fawtara programme. Their dedicated implementation timing should therefore be treated as TBC by the OTA.
For private-sector taxable persons, however, the new electronic invoicing obligation is based on the taxpayer’s annual-supplies threshold and applies to supplies generally, including supplies made to non-taxable persons. Businesses invoicing public-sector customers should therefore prepare their B2G processes in line with their own mandatory date, while continuing to monitor the OTA for any government-specific receiving, onboarding or implementation rules.
What is B2C e-invoicing in Oman?
B2C transactions are included in Oman’s Fawtara design. The amended VAT Executive Regulations cover supplies made to non-taxable persons, and the amended simplified-invoice rule requires simplified tax invoices to be issued within the same statutory time limits referred to in Article 143.
From an operational reporting perspective, OTA guidance requires B2C e-invoices to be submitted within 24 hours. Where the consumer is not part of the Peppol network, the seller can continue to provide the human-readable invoice through its existing customer channel, while the seller’s accredited service provider reports the required tax data to the OTA.
For B2C invoices, the QR code is generated by the taxpayer and appears only on the human-readable invoice, not inside the structured e-invoice XML. The OTA states that the QR code is mandatory for all B2C transactions, whether the invoice is full or simplified.
E-Invoicing in Oman 2026 Last Updates
The most important 2026 development is the publication of Decision No. 189/2026, which moves Fawtara from a planned programme into a legally dated VAT invoicing obligation. The decision replaces the earlier planning timeline for mandatory taxpayer compliance with two statutory dates: 1 April 2027 and 1 October 2027, divided by an OMR 5 million annual-supplies threshold.
The decision also adds specific system-security and business-continuity obligations. Taxable persons must take measures to ensure secure electronic issuance, protect systems against unauthorised access, prepare for emergencies and technical failures, and maintain mechanisms that allow data or information to be restored so that the system can continue operating effectively.
In parallel, OTA has also published service-provider and taxpayer-association manuals, service-provider accreditation criteria and the Oman SMP API specification. The OTA uses a centralised SMP for domestic participant records.
The 100-company group selected by the OTA in 2026 should be treated as a voluntary pilot and readiness phase, not as the general statutory compliance date. The mandatory dates for taxable persons are those set by Decision No. 189/2026.
E-Invoicing in Oman Deadlines and Compliance Roadmap
The statutory compliance roadmap is now set by Decision No. 189/2026. Businesses should use the legal dates below for mandatory taxpayer planning rather than the earlier rollout dates that may still appear in older OTA awareness or FAQ materials.
| Timeline | Obliged entities |
| 1 April 2027 | Taxable persons whose annual supplies exceed OMR 5 million |
| 1 October 2027 | Taxable persons whose annual supplies do not exceed OMR 5 million |
| TBC by OTA | Government institutions and entities – separate implementation timing to be confirmed by the OTA |
Is e-Invoicing Mandatory in Oman?
Yes. Decision No. 189/2026 makes electronic tax invoicing mandatory for taxable persons from the date applicable to their annual-supplies threshold. Taxable persons above OMR 5 million move into the mandatory regime on 1 April 2027, while taxable persons at or below OMR 5 million follow on 1 October 2027.
Before those dates, selected taxpayers may participate in the pilot or adopt early where supported by the OTA framework. The pilot and any voluntary preparation should not be confused with the legally binding commencement dates.
Oman E-Invoicing Requirements
The Oman framework now combines binding VAT rules with detailed operational and technical requirements. From the applicable date, taxable persons must issue tax invoices in an approved and secure electronic format, ensure invoice integrity and readability throughout the retention period, and maintain a unique number for each invoice. The ordinary VAT issuance deadline remains a maximum of 15 days from the relevant triggering event.
Businesses must also operate appropriate technical safeguards. Decision No. 189/2026 requires measures against system intrusion and unauthorised access, procedures for emergencies and technical failures, and mechanisms for restoring lost data or information and maintaining business continuity.
Operationally, taxpayers should select an OTA-accredited service provider and integrate their ERP or billing environment with the Fawtara process. OTA guidance requires B2B submission in real time and B2C submission within 24 hours. The technical model is based on PINT OM Billing, PINT OM Self-Billing and a separate Oman TDD for tax reporting, all currently at version 1.0.1.
Archiving remains the taxpayer’s responsibility under Oman VAT rules. VAT records are generally retained for 10 years, with a 15-year period for real-estate-related records. Records must be maintained inside Oman or, where record keeping is centralised outside Oman, the Oman-related VAT records must remain accessible from the Sultanate and be available to the OTA on request.
The service-provider framework is also established. OTA criteria include a mainland Oman commercial registration with a relevant activity, paid-up capital of at least OMR 6,000, operational-experience requirements, tax and solvency checks, and technical and security controls covering architecture, MFA, encryption, monitoring, incident response and ISO/IEC 27001. Foreign providers may participate, but they must meet the OTA criteria, including a local presence in Oman.
When Will E-invoices in Oman Become Mandatory?
The mandatory dates are now set in Decision No. 189/2026. Electronic tax invoicing applies from 1 April 2027 to taxable persons whose annual supplies exceed OMR 5 million and from 1 October 2027 to taxable persons whose annual supplies do not exceed OMR 5 million.
The OTA’s earlier public rollout materials referred to August 2026, February 2027 and August 2027 planning phases. Those materials remain useful for understanding the pilot and programme development, but the statutory dates in Decision No. 189/2026 should be used for mandatory compliance planning.
Government institutions and entities remain identified by the OTA as a separate group within the wider programme. Their specific mandatory date is TBC by the OTA.
Who is Obliged to Use e-Invoicing in Oman?
The legal obligation applies to taxable persons under the Oman VAT framework. The implementation date depends on annual supplies: taxable persons above OMR 5 million are subject to the mandate from 1 April 2027, and those at or below OMR 5 million from 1 October 2027.
OTA guidance states that there are no industry-based exemptions. Companies within a VAT group are also expected to follow the e-invoicing mandate in accordance with the applicable requirements. A non-VAT-registered person is not brought into the VAT e-invoicing obligation merely because it issues an invoice to a VAT-registered customer.
Decision No. 189/2026 does, however, introduce a formal temporary exception mechanism. The Chairman of the Tax Authority may, on a taxpayer’s supported request and for reasons accepted by the OTA, grant an exception from electronic tax invoicing for a period determined by the Authority, provided the taxpayer continues to file VAT returns and pay tax due within the statutory deadlines.
How to Generate e-Invoices in Oman?
Generating a compliant Oman e-invoice requires more than converting an invoice into PDF. Businesses should first determine their applicable legal date, select an OTA-accredited service provider and complete the required taxpayer-to-service-provider association and technical onboarding.
The seller’s ERP or billing system should provide the required invoice data to the service provider. The service provider prepares or validates the Oman PINT document, applies the relevant identifiers and business rules, routes the invoice through the Peppol model where applicable, and creates the Oman TDD required for tax reporting. Invoice and TDD delivery/status messages should be captured as part of the audit trail and exception-management process.
For B2C, the customer-facing invoice may still be delivered outside Peppol, but the seller-side reporting obligation remains and the human-readable invoice must contain the required QR code. For imports, OTA guidance requires reporting through self-billing. Export, non-Peppol, profit-margin and other special transaction types should be mapped to the Oman-specific identifiers and rules.
From a data perspective, businesses should map supplier and buyer identifiers, VAT registration details, transaction types, invoice numbers and dates, line-level quantities and units, tax categories and exemption logic, currencies, monetary totals, payment information, original-document references, and the identifiers needed for invoice, TDD and transmission traceability.
Oman e-Invoicing Implementation Checklist
Businesses should treat Oman e-invoicing as a cross-functional compliance programme. The first step is to confirm the entity’s statutory date using the OMR 5 million annual-supplies threshold and identify all relevant B2B, B2C, B2G, export, import, reverse-charge, self-billing, credit-note, profit-margin and non-Peppol scenarios.
Companies should select an accredited service provider, complete Fawtara onboarding, review master data, and confirm that ERP, billing and POS systems can generate the required structured information.
Finally, businesses should establish operational controls for rejected invoices, failed transmissions, resubmissions, outages, service-provider changes and archiving. Finance, tax, IT, procurement and sales teams should understand which system creates the invoice, which party reports the TDD, which status proves successful transmission, and where the legally required records and evidence will be retained.
FAQs About E-Invoicing in Oman
Below are the most common practical questions businesses ask when planning for Oman e-invoicing under the current legal and technical framework.
What is the standard format for E-Invoices in Oman?
Oman’s technical specifications are Peppol-based and are now published as final version 1.0.1. PINT OM Billing is used for standard invoices and credit notes, PINT OM Self-Billing covers self-billed invoices and credit notes, and the separate Oman TDD is used to report invoice tax data to the OTA.
The structured compliance payload is UBL/XML. A human-readable representation remains relevant for customer display and B2C use cases, but it should not be treated as a substitute for the structured e-invoice. For B2C, the QR code appears on the human-readable invoice rather than inside the XML.
How does e-invoicing benefit businesses in Oman?
The OTA presents e-invoicing as a way to improve efficiency, transparency, auditability, system integration, secure archiving and data quality while reducing manual errors and operating costs. For businesses, the move to structured invoice data can also strengthen reconciliation, tax control, procurement processes and the quality of supporting evidence for VAT treatment.
Can small businesses benefit from e-invoicing in Oman?
Yes. Smaller VAT-registered businesses are not exempt from the final mandate. Taxable persons whose annual supplies do not exceed OMR 5 million are scheduled to enter the mandatory regime on 1 October 2027.
OTA guidance also allows businesses outside an earlier rollout or pilot group to adopt voluntarily with the required support. Early preparation can help smaller businesses improve bookkeeping, VAT evidence, collections and integration readiness before the mandatory date.
Are there any exemptions to the e-invoicing requirements in Oman?
There are no general industry exemptions in the OTA guidance. Out-of-scope supplies are not expected to require mandatory e-invoicing under the Fawtara guidance, while the statutory obligation in Decision No. 189/2026 applies to taxable persons from their respective commencement date.
How can businesses in Oman prepare for the e-invoicing transition?
Preparation should start with the statutory date and transaction scope. Businesses should determine whether they fall into the 1 April or 1 October 2027 wave, then map B2B, B2C, B2G, import, export, self-billing, credit-note, profit-margin and other relevant invoice flows against the Oman PINT and TDD requirements.
The next priorities are accredited service-provider selection, Fawtara association, ERP/API integration, master-data quality, validation rules, B2C QR generation, archiving, security and business continuity. Businesses should also define operational ownership for negative statuses, rejected documents, resubmissions and outages before go-live.
What software solutions are available for e-invoicing in Oman?
Businesses subject to Oman’s e-invoicing mandate will need to use an OTA-accredited service provider (ASP) to connect to the Fawtara framework and exchange compliant electronic invoices and tax data.
The selected solution should therefore support the accredited-service-provider model, Peppol connectivity, PINT OM Billing and Self-Billing, Oman TDD reporting, the centralised SMP, secure ERP/API integration, and Oman-specific validation and QR requirements.
Businesses should also confirm that their chosen provider is approved by the OTA and can support the required transaction scenarios, operational statuses, security controls and audit or archiving evidence.
Are there penalties for non-compliance with e-invoicing regulations in Oman?
Decision No. 189/2026 introduces binding electronic-invoicing obligations but does not set out a separate, detailed Fawtara penalty matrix. Existing VAT-law enforcement and penalty provisions remain relevant, and the OTA may issue further guidance on how e-invoicing failures will be treated in practice.
Businesses should therefore not wait for a dedicated fine schedule before preparing. Failure to issue invoices in the required format, weak record retention, system-security failures or unresolved transmission problems may create both tax-compliance and operational risks once the relevant mandatory date applies.