Introduction
Introduction
Sahalah is Oman’s purpose-built e-invoicing platform, designed to help businesses of every size achieve full compliance with the Oman Tax Authority (OTA) e-invoicing mandate.
What is Sahalah?
Sahalah handles the complete e-invoicing lifecycle:
- Receive structured invoice data from your ERP, accounting software, or via API
- Validate every field against OTA’s schema and business rules before submission
- Generate compliant PDF (human-readable) and UBL 2.1 XML (machine-readable) documents
- Submit to the OTA portal in real time and receive an Invoice Reference Number (IRN)
- Store a full audit trail in your Sahalah dashboard
OTA Compliance Phases
| Phase | Scope | Go-Live |
|---|---|---|
| Phase 1 | Large taxpayers (Tier A) | August 2026 |
| Phase 2 | Medium taxpayers (Tier B) | February 2027 |
| Phase 3 | Small taxpayers & self-employed | August 2027+ |
Key Concepts
- OTA — Oman Tax Authority, the regulatory body overseeing e-invoicing
- IRN — Invoice Reference Number issued by OTA upon successful acceptance
- UBL 2.1 — Universal Business Language XML standard used for e-invoices
- VAT — 5% standard rate applied in the Sultanate of Oman
- OMR — Omani Rial, the currency for all pricing and invoice amounts
Next Steps
- Quick Start — make your first API call in under 5 minutes
- Authentication — obtain and manage your API keys
- Invoice Lifecycle — understand the full flow
Full API reference markdown is being prepared and will be published here shortly.
Contact support@sahalah.om for early access.