VAT Registration in Oman (2026): OMR 38,500 Threshold, Invoice Rules & Filing
Oman introduced 5% VAT in April 2021, administered by the Oman Tax Authority through its online tax management system. The rate is low by regional standards, but the compliance detail is specific: Arabic-language invoicing, three-decimal rial amounts, quarterly filing and a ten-year record-retention rule.
This guide sets out the thresholds, the registration process, the invoice rules that most often trip up newly registered businesses, and the penalty regime.
Thresholds and who has to register
Registration is based on annual taxable supplies. Oman phased in registration by turnover band when VAT launched; the steady-state position is a single mandatory threshold with a voluntary option at half that level.
Non-resident suppliers making taxable supplies in Oman must register regardless of value, appointing a responsible person resident in the Sultanate.
- Mandatory: OMR 38,500 of annual taxable supplies
- Voluntary: OMR 19,250 of taxable supplies or taxable expenses
- Non-residents: registration required from the first taxable supply, with a resident responsible person
- Exempt supplies — including certain financial services, healthcare and education — do not count toward the threshold
Documents to prepare
Registration is submitted on the Oman Tax Authority e-portal. Most rejections come from mismatches between the commercial registration record and the details entered.
- Commercial registration certificate issued by the Ministry of Commerce, Industry and Investment Promotion
- Tax card number
- Identity documents for the owner, partners and authorised signatory
- Bank account details in the entity's legal name
- Turnover evidence for the past 12 months and a forecast for the next 12
- Customs code where the business imports goods
Registering on the Oman Tax Authority portal
The portal issues a VATIN beginning with OM once the application is approved, and that number must appear on every tax invoice you issue from the effective date.
- 1. Create or sign in to the taxpayer account on the Oman Tax Authority e-portal.
- 2. Open the VAT registration form and confirm the commercial registration details.
- 3. Declare the taxable supplies figure that triggered the obligation and the requested effective date.
- 4. Enter business activity codes and the addresses of all branches.
- 5. Add banking details and the customs code where you import.
- 6. Upload supporting documents and submit.
- 7. Download the VAT certificate and configure your invoicing system with the OM VATIN before your first sale after the effective date.
Omani tax invoice rules
Oman's invoice rules are stricter on presentation than most of the GCC. Arabic is required, English is permitted alongside it, and rial amounts are shown to three decimal places — a formatting requirement that generic accounting software frequently gets wrong.
- Arabic language required, with English permitted as a parallel language
- Supplier VATIN starting with OM, plus the customer VATIN for B2B supplies
- Values in OMR to three decimal places
- Sequential numbering per invoice series, with the date of supply shown
- Zero-rated and exempt lines identified separately with the reason for the treatment
Filing, payment and records
All registrants file quarterly. The return and the payment are due within 30 days of the quarter end. Records must be kept for ten years — fifteen for real estate — and produced in Arabic on request. The Oman Tax Authority has also published a phased e-invoicing roadmap starting with large taxpayers, based on a clearance model similar to ZATCA's, so systems bought today should be checked for that trajectory.
| Item | Requirement |
|---|---|
| Standard rate | 5% |
| Mandatory threshold | OMR 38,500 |
| Voluntary threshold | OMR 19,250 |
| Filing frequency | Quarterly |
| Return + payment deadline | Within 30 days of the quarter end |
| Record retention | 10 years (15 years for real estate) |
Penalties
Penalties are set as ranges in the VAT Law and its executive regulations, with criminal referral reserved for evasion.
- OMR 500 to OMR 5,000 for failing to register or to notify a change in details
- 1% of the unpaid tax per month of delay
- OMR 1,000 to OMR 10,000 for failing to issue compliant tax invoices
- Up to OMR 20,000 and criminal referral for tax evasion
Frequently asked questions
When is the Omani VAT return due?
Within 30 days of the end of each quarter. Payment is due on the same date, and all registrants file quarterly regardless of size.
Must Omani invoices be in Arabic?
Yes. Arabic is required on the tax invoice; English can be shown alongside it as a parallel language.
How long must records be kept in Oman?
Ten years for general records and fifteen years for real-estate records, and they must be producible in Arabic on request.
Is e-invoicing mandatory in Oman?
Not for all taxpayers yet. The Oman Tax Authority has published a phased roadmap that begins with large taxpayers and follows a clearance model comparable to Saudi Arabia's.
Useful next steps
Sources: Oman Tax Authority. This guide is general information, not tax advice.