Oman VAT is a 5% tax on most goods and services, run by the Oman Tax Authority (OTA) since 16 April 2021 under Royal Decree No. 121/2020. A business based in Oman must register once its taxable supplies pass OMR 38,500 a year, files a VAT return every quarter, and must issue tax invoices that follow the Executive Regulations. Fawtara, Oman's e-invoicing system, is the next layer: under Decision No. 189/2026, issued in August 2026, e-invoicing becomes mandatory from 1 April 2027 for businesses with annual supplies above OMR 5 million and from 1 October 2027 for everyone else who is VAT-registered. This guide covers both, in plain language, for small businesses and freelancers in Oman and for UAE and Saudi companies that sell into Oman.
What is the VAT rate in Oman, and what is zero-rated or exempt?
The standard rate is 5%, the same as the UAE and a third of Saudi Arabia's 15%. Some supplies are taxed at 0% and some are exempt, and the difference matters for your costs.
| Treatment | What it means | Examples |
|---|---|---|
| Standard-rated (5%) | Charge 5% VAT, recover VAT on your costs | Most goods and services, including professional, marketing and IT services |
| Zero-rated (0%) | Charge 0% VAT, still recover VAT on your costs | Exports of goods and services outside Oman, international transport, listed basic food items, medicines and medical equipment (with Ministry of Health release), crude oil, oil derivatives and natural gas |
| Exempt | No VAT charged, VAT on related costs cannot be recovered | Certain financial services, healthcare, education, local passenger transport, residential rent, some real estate transactions such as undeveloped land |
Several items (basic food, medicines) depend on detailed schedules, so check the specific item before pricing.
When does a small business in Oman have to register for VAT?
Registration depends on your taxable supplies, tested on a rolling basis.
| Registration | Threshold | Test |
|---|---|---|
| Mandatory | Taxable supplies above OMR 38,500 a year | Exceeded in the previous 12 months, or expected to exceed in the next 12 months |
| Voluntary | Taxable supplies or expenses above OMR 19,250 a year | Optional; lets you recover input VAT |
| Non-resident making taxable supplies in Oman | No threshold | Registration can be required from the first taxable supply |
Threshold: OMR 38,500 in taxable supplies, checked month by month against both the last 12 months and the next 12 months.
Apply through the OTA's tax portal (tms.taxoman.gov.om). Advisers commonly cite a window of about 30 days after you cross or expect to cross the threshold, so start the application as soon as your monthly check shows you are close. Unregistered businesses that should have registered face administrative penalties, and the OTA can assess the VAT you should have charged, which then comes out of your margin rather than your customer's pocket.
Voluntary registration between OMR 19,250 and OMR 38,500 is worth considering if most of your customers are VAT-registered businesses (they recover the VAT you charge, so your price does not effectively rise) and you have meaningful VAT on your own costs, such as equipment, rent on commercial premises or software.
How often do you file VAT returns in Oman, and when are they due?
Returns are quarterly, based on calendar quarters, and both the return and the payment are due within 30 days of the end of the quarter. If the due date falls on a weekend or public holiday, it moves to the next working day.
| Quarter | Period | Return and payment due |
|---|---|---|
| Q1 | 1 January to 31 March | 30 April |
| Q2 | 1 April to 30 June | 30 July |
| Q3 | 1 July to 30 September | 30 October |
| Q4 | 1 October to 31 December | 30 January |
Deadline: The Q3 2026 return (July to September) is due by 30 October 2026, filed and paid electronically through the OTA portal.
What must an Oman tax invoice contain?
A VAT-registered business must issue a tax invoice for taxable supplies, including advance payments. The Executive Regulations set the content. A full tax invoice includes:
| Field | Notes |
|---|---|
| The words "Tax Invoice" | Clearly shown on the document |
| Date of issue, and date of supply if different | Date of payment too, where payment came before the invoice |
| Sequential invoice number | Unique, with no unexplained gaps |
| Supplier's name, address and VAT number | As registered with the OTA |
| Customer's name, address and VAT number | VAT number where the customer is registered |
| Description, quantity and unit price | Specific enough to identify the supply |
| Value excluding VAT | Per line and in total |
| VAT rate and VAT amount | VAT amount shown in Omani rials |
| Discounts | Shown, not netted off silently |
Three rules catch people out.
Fifteen days. Advisers reading Article 143 of the Executive Regulations report that a tax invoice must be issued within 15 days of the supply. A monthly summary invoice for repeat supplies to one customer is due within 15 days after the month ends.
Simplified invoices have a low ceiling. A simplified tax invoice, with the customer's details left out, is widely reported as available only for supplies below OMR 500 excluding VAT. Above that, issue a full tax invoice.
VAT must be shown in rials. You can invoice in USD or AED, but the VAT amount must be converted to OMR at the Central Bank of Oman rate for the date the tax is due.
Do Oman invoices have to be in Arabic?
Not strictly. The OTA's position, as summarised by PwC, is that records and invoices may be kept in any language provided they are made available in Arabic on the OTA's request. In practice that means an English invoice is acceptable day to day, but you need to be able to produce an Arabic version quickly during an audit. Bilingual templates remove the problem.
How long do you keep VAT records?
Ten years for most businesses, and fifteen years for records relating to real estate. That is double the UAE's five-year rule, so do not copy a UAE retention policy across the border.
A worked OMR invoice with 5% VAT
The Omani rial is divided into 1,000 baisa, so amounts run to three decimal places. A spreadsheet formatted to two decimals will drift, and the VAT line is where it shows.
A Muscat web agency, VAT-registered, bills a registered customer for a quarter of maintenance and a year of prepaid hosting:
| Line | Qty | Unit price (OMR) | Net (OMR) | VAT 5% (OMR) | Total (OMR) |
|---|---|---|---|---|---|
| Website maintenance, monthly | 3 | 150.000 | 450.000 | 22.500 | 472.500 |
| Hosting, 12 months prepaid | 12 | 8.250 | 99.000 | 4.950 | 103.950 |
| Totals | 549.000 | 27.450 | 576.450 |
Check: 450.000 + 99.000 = 549.000; 549.000 × 5% = 27.450; 549.000 + 27.450 = 576.450. Because the net value is above OMR 500, this has to be a full tax invoice with the customer's name, address and VAT number.
If the same agency invoiced a client in US dollars, say USD 1,000 net, the VAT would still be shown in rials. The rial is pegged at about 0.3845 per US dollar, so the net converts to about OMR 384.500 and the VAT line to OMR 19.225. Use the Central Bank of Oman's published rate for the tax due date, not your bank's rate.
What are the penalties for getting Oman VAT wrong?
| Failure | Penalty (as summarised by PwC and ClearTax) |
|---|---|
| Late VAT return | OMR 500 to OMR 5,000 |
| Late VAT payment | 1% of the unpaid tax per month or part of a month |
| Failing to issue a valid tax invoice on time | Reported by advisers as OMR 500 to OMR 5,000 |
If you cannot pay in full, file on time anyway so the late-filing penalty does not stack on top.
What is Fawtara, and when does e-invoicing apply to you?
Fawtara is the OTA's e-invoicing programme. Once it applies to you, an invoice is no longer a PDF you email. It is a structured XML file generated by an approved system and exchanged through an accredited service provider. The OTA has said that paper invoices, PDF invoices and scanned images sent by email will not count as electronic tax invoices after your compliance date.
The timeline changed in August 2026. Earlier announcements, still repeated on many websites, described a four-phase rollout starting with large taxpayers in August 2026, all large companies in February 2027 and everyone else in August 2027. Decision No. 189/2026, issued on 9 August 2026 and amending the VAT Executive Regulations, replaced that with:
| Stage | Who | Date |
|---|---|---|
| Pilot | About 100 selected large companies, notified by the OTA, participating voluntarily | From late August 2026 |
| Phase 1 | VAT-registered businesses with annual supplies above OMR 5 million | 1 April 2027 |
| Phase 2 | All other VAT-registered businesses, including SMEs | 1 October 2027 |
| Government (B2G) | Government entities | Expected 2028; not yet fixed |
Deadline: If you are VAT-registered in Oman with annual supplies of OMR 5 million or less, Fawtara applies to you from 1 October 2027.
How does the Fawtara model work?
Reported details of the model:
- Five corners: the supplier, the supplier's accredited service provider, the buyer's accredited service provider, the buyer, and the OTA, which receives the invoice data.
- Peppol-based: the network and format follow Peppol, with an Oman-specific invoice specification (PINT OM).
- Scope: B2B invoices and simplified tax invoices, including invoices for advance payments. How retail and consumer invoices will flow in practice is still being detailed.
- Controls: unique numbering, secure issuance, protection against unauthorised access, backup and recovery, and invoices that stay readable and verifiable for the full retention period.
Limited exemptions can be requested from the OTA, reportedly conditional on filing and paying VAT on time. Do not plan around getting one.
What should a small business do before October 2027?
- Confirm your phase. Take your annual taxable supplies. Above OMR 5 million is April 2027; at or below is October 2027.
- Clean your customer records. Legal names, addresses and VAT numbers for every registered customer. Structured invoices reject what a PDF lets slide.
- Standardise your item list. Consistent descriptions, units, prices and VAT treatment per product or service.
- Fix your numbering. One sequence per invoice series, no gaps, no manual renumbering.
- Ask your software vendor directly whether they will connect to an OTA-accredited service provider for Oman, and by when. Get the answer in writing.
- Watch the OTA's list of accredited service providers and compare pricing in the first half of 2027, not the last month before your date.
- Get an Arabic version of your templates ready now; it costs little and removes an audit risk today.
I run a UAE or Saudi business. Does Oman VAT affect me?
It can. Three situations come up most often:
- Services to a VAT-registered Omani business. The Omani customer generally accounts for the VAT under the reverse-charge mechanism, and you invoice without Omani VAT. Confirm the treatment for your specific service.
- Goods delivered in Oman or services to Omani consumers. A non-resident making taxable supplies in Oman can be required to register with no threshold, and the OTA's non-resident procedure may involve a tax representative or a bank guarantee.
- Exports from the UAE or KSA. Your home VAT rules apply to the export (commonly zero-rated), and import VAT is handled on the Omani side.
Keep your Omani customers' VAT numbers on file either way. If you are also dealing with the UAE mandate, see our UAE e-invoicing July 2027 checklist: the two deadlines fall three months apart, and the preparation work is largely the same.
From the platform: Staks handles the day-to-day side of Omani invoicing. You can invoice in OMR alongside AED and SAR, with the exchange rate stored on each transaction against your base currency. Tax rates apply per line on invoices, quotes and credit notes. Your VAT number and your customer's VAT number sit on the company records and appear on every document. To be plain about the limits: Staks is not an OTA-accredited e-invoicing service provider, it does not issue Fawtara XML invoices, and it has no Arabic interface. Once your Fawtara date arrives, you will need an accredited provider for the e-invoice itself.
Frequently asked questions
Is VAT in Oman 5% on everything?
No. Most supplies are 5%, but exports, international transport, listed basic foods, approved medicines and medical equipment, and oil and gas are zero-rated. Some financial services, healthcare, education, local passenger transport and residential rent are exempt.
I earn OMR 25,000 a year as a freelancer. Do I need to register?
Not compulsorily, because you are below OMR 38,500. You can register voluntarily because you are above OMR 19,250. Registering makes sense mainly if your clients are VAT-registered businesses and you have VAT on your own costs to recover.
Can I keep sending PDF invoices after Fawtara starts?
Until your compliance date, yes, provided they meet the tax invoice rules. After 1 April 2027 (above OMR 5 million) or 1 October 2027 (everyone else), a PDF emailed to a customer will not count as an electronic tax invoice.
Is Oman's e-invoicing the same as Saudi Arabia's ZATCA system?
No. Saudi Arabia uses a clearance model in which ZATCA's Fatoora platform validates standard invoices before they are sent. Oman is building a Peppol-based five-corner model through accredited service providers, closer to the UAE's approach. See our ZATCA e-invoicing guide for small businesses for the Saudi side.
Related reading
- UAE e-invoicing July 2027 checklist
- UAE tax invoice requirements: every mandatory field
- ZATCA e-invoicing for small businesses
- Subscription billing and VAT in the Gulf
Get your customer records, VAT numbers and invoice numbering in order now, and October 2027 is a connection project instead of a cleanup. Start a 14-day free trial of Staks to run your OMR, AED and SAR invoicing in one place.