Skip to main content

🇴🇲 Oman - E-Invoicing Specifications (Tax Authority)

Status: 🟢 Mandatory | Active for all businesses Authority: Tax Authority Platform: e-Invoice System (VAT)

1. Context & Overview

Oman has implemented mandatory e-invoicing through the Tax Authority. The system aligns with GCC VAT requirements and focuses on real-time invoice reporting.

DateScopeObligation
2021+All businessesMandatory e-invoicing
OngoingContinuousReal-time reporting

2. Technical Workflow (Clearance Model)

flowchart TD
    S["Invoicerr (Supplier)"] -->|1. Generate XML/JSON| X[Invoice Document]
    X -->|2. Submit to TA| TA[Tax Authority]
    
    TA -->|3. Validation| V[Schema + Rules]
    V -->|4. Processing| TA
    
    TA -->|5. Return ACK| S
    
    S -->|6. Deliver Invoice| C[Client]
    S -->|7. Store Document| DB[Archive]

🧱 Key Components

  1. TIN (Tax Identification Number): Tax ID
  2. Tax Authority Registration: Required
  3. Invoice Format: XML/JSON GCC standard

3. Data Standards & Formats

A. Required Format

  • XML/JSON Format: GCC standard
  • Encoding: UTF-8
  • Digital Signature: Required

B. Document Types

TypeDescription
Tax InvoiceStandard VAT invoice
Simplified InvoiceB2C invoices
Credit/Debit NoteAdjustments

C. Critical Data Fields

  • TIN: Tax ID
  • VAT Rate: 5% standard
  • Invoice Number: Unique identifier
  • Timestamp: ISO 8601 format

4. Business Model & Compliance

A. Workflow

  1. TIN Registration: Obtain Omani tax ID
  2. TA Registration: Register on platform
  3. Document Generation: Create invoice
  4. Submission: Send to Tax Authority
  5. Delivery: Send to buyer

B. Archiving

  • Retention: 6 years
  • Format: Original document

5. Implementation Checklist

  • TIN Registration: Obtain Omani tax ID
  • TA Registration: Register on platform
  • API Integration: Connect to e-Invoice system
  • Document Types: Support all types

6. Resources