VAT in Oman: What UAE Businesses Need to Know

Oman is one of the UAE’s closest trading partners, and for a growing number of Dubai and Sharjah SMEs it is the first cross-border market they touch. Goods move south through Sohar and Salalah, service contracts get signed in Muscat, and a UAE finance team that had only ever dealt with the Federal Tax Authority suddenly finds a second VAT system in the picture. The good news is that Oman’s VAT looks familiar — same 5% rate, same broad architecture as the UAE. The catch is that “looks familiar” is exactly what trips people up, because the two regimes diverge in the details that decide who pays, when they file, and what evidence they need to keep. This guide sets out how VAT in Oman actually works, and then focuses on the part that matters most to a UAE business: what happens when goods and services cross the border.

How VAT in Oman works

Oman introduced VAT with effect from 16 April 2021, under Royal Decree No. 121/2020, which enacted the VAT Law. The detailed rules sit in the Executive Regulations issued by the Oman Tax Authority, the body that administers and collects the tax. The standard rate is 5%, and there has been no announced move to change it, so 5% is the number to plan around.

If that sounds a lot like the UAE, it should. Both countries are members of the GCC and both built their systems on the GCC Unified VAT Agreement, the framework that was meant to give the six Gulf states a broadly common VAT design. In practice each state wrote its own law within that framework, which is why the rate is shared but the thresholds, deadlines and administrative detail are not. If you want to see how the wider region lines up, our GCC tax comparison puts Oman next to the UAE, Saudi Arabia, Bahrain and the rest on one page.

The mechanics are the ones any UAE accountant already knows. A registered business charges VAT on its taxable supplies (output tax), reclaims the VAT it pays on its own costs (input tax), and pays the difference to the tax authority. Where input tax exceeds output tax in a period, the business is in a refund position. The whole system runs on proper tax invoices and clean records, and the Oman Tax Authority can inspect both.

Who has to register

Registration in Oman turns on the value of a business’s taxable supplies, and the thresholds are set in Omani rial rather than dirhams — a small point that matters when you convert figures for a UAE parent company.

Registration is mandatory once annual taxable supplies exceed OMR 38,500, tested on a rolling basis: you look back over the past twelve months and forward over the coming period. Voluntary registration is open from OMR 19,250 of taxable supplies or taxable expenses, which gives an early-stage business the option to register before it is compelled to, usually so it can recover input VAT on set-up costs. There is also a distinct rule for non-residents: a business with no fixed presence in Oman that makes taxable supplies there, where no one else is liable to account for the tax, is generally required to register without the benefit of any threshold.

Registration is done through the Oman Tax Authority’s online portal. The information required is the sort of thing any registration asks for — legal identity, commercial registration details, activities, expected turnover and banking information — and a successful registration produces a VAT identification number that must then appear on the business’s tax invoices. If your team has been through UAE VAT registration, the shape of the exercise will feel recognisable; our walkthrough of how to register for VAT in the UAE covers the home-market equivalent, and the discipline is the same even though the portal and thresholds differ.

Zero-rated and exempt supplies are not the same thing

The single most useful distinction in any VAT system is the one between zero-rated and exempt supplies, and Oman is no exception. They sound similar and behave very differently.

A zero-rated supply is taxable, but at 0%. The supplier charges no VAT to the customer, yet — crucially — can still recover the input VAT on its related costs. In Oman, zero-rating covers things such as exports of goods and services outside Oman, international transport, certain basic food items, and specified supplies of medicines and medical equipment, among others set out in the regulations.

An exempt supply is outside the charge to VAT altogether. No VAT is added, and the supplier cannot recover the input VAT attributable to making that supply. Oman’s exemptions typically include certain financial services, healthcare, education, local passenger transport, bare land, and the leasing of residential property.

Where a business makes a mixture of taxable and exempt supplies, it has to apportion its input VAT, recovering only the share that relates to its taxable activity. That apportionment is one of the more error-prone parts of any VAT return, in Oman as much as in the UAE, and it rewards getting the classification right from the start rather than unpicking it at year end.

Filing, payment and records

Oman runs a quarterly VAT return for most taxpayers. The return has to be filed, and any tax due paid, within 30 days of the end of the tax period. That is worth underlining for anyone managing both sides of the border, because it does not line up with the UAE’s 28-day deadline — a group filing in both countries needs two separate compliance calendars, not one shared reminder.

Returns go in through the Oman Tax Authority portal, and the numbers have to reconcile to the underlying books. Tax invoices carry formal content requirements, and Arabic has a role in official documentation, so a UAE business used to issuing English-only invoices should check the format before it starts billing Omani customers. Records supporting the returns must be retained for the period the VAT Law sets — a long horizon by ordinary bookkeeping standards, and longer still for real-estate-related records — so archiving cannot be an afterthought.

“

The Omani rate is identical to the UAE’s, but almost nothing else about the two return cycles matches. The businesses that stumble are the ones that assumed one calendar, one invoice template and one set of habits would carry across the border.

Penalties exist for the usual failures — not registering when required, filing late, paying late, or getting returns wrong — and in serious cases of evasion the consequences escalate well beyond administrative fines. We are not going to quote specific penalty figures here, because they are exactly the kind of number that should be checked against the current law rather than a blog post. The practical takeaway is simpler: register when you cross the line, file on the 30-day clock, and keep the records to back up what you filed.

What VAT in Oman means for a UAE business

For most of our clients the Omani domestic rules are background; the live question is what happens when a UAE company sells to, or buys from, Oman. This is where the two systems interact, and where the mistakes get expensive.

Start with goods. Although the GCC Unified VAT Agreement envisaged member states eventually treating each other as a single VAT zone, the electronic services system that would make that work is not yet operational. Until it is, the UAE treats Oman the way it treats any country outside the GCC. In practice, a UAE business exporting goods to Oman applies the UAE export rules — typically zero-rating the supply, provided it holds the commercial and official evidence that the goods actually left the country — while VAT is accounted for in Oman when the goods are imported there. The zero-rating is not automatic; it stands or falls on the export documentation, and a zero-rated sale with no evidence behind it is a standard-rated sale waiting to be reassessed.

Services work differently again, because they turn on place-of-supply and reverse-charge rules rather than a physical border crossing. Where a UAE business buys services from an Oman-based supplier, the UAE reverse charge may require the UAE customer to account for the VAT itself; where a UAE business supplies services into Oman, the Omani rules decide whether the tax falls on the supplier or the Omani recipient. If the reverse charge is unfamiliar territory, our explainer on the reverse-charge mechanism in the UAE sets out the home-side mechanics that most cross-border service flows depend on.

Then there is the question of Omani VAT that a UAE business actually incurs — local costs on a project in Oman, for instance. A UAE company registered in Oman recovers that input VAT through its Omani returns. A UAE company that is not registered in Oman cannot claw it back through a UAE return, because UAE returns only deal with UAE VAT; any recovery would depend on whether Oman offers a foreign-business refund route and whether the conditions are met. The logic mirrors the way overseas businesses reclaim UAE tax, which we cover in our guide to the UAE VAT refund process and deadline — the principle is the same even though the jurisdiction is not.

The mistakes worth avoiding

A few patterns come up again and again when UAE businesses first deal with Oman. Assuming the UAE registration somehow “covers” Oman is the most common — it does not; Oman is a separate registration in a separate system. Missing the OMR-denominated thresholds because turnover was only ever tracked in dirhams is another. Zero-rating an export without keeping the evidence to support it is a third, and it is the one most likely to surface in an inspection. And treating the two return calendars as interchangeable — 28 days in one country, 30 in the other, quarterly cycles that do not align — quietly produces late filings.

None of these are difficult to avoid. They are avoided by mapping the transaction flow before the first invoice goes out: which entity is supplying what, to whom, from where, and therefore who has a registration or accounting obligation on each leg. Do that once, properly, and the ongoing compliance becomes routine. Our VAT advisory work with cross-border SMEs is largely this — sorting out the treatment at the design stage so the returns look after themselves afterwards.

Bringing it together

VAT in Oman is not exotic. It is a 5% GCC-style system, introduced in 2021, administered by the Oman Tax Authority, with mandatory registration at OMR 38,500, quarterly returns due within 30 days, and the familiar split between standard-rated, zero-rated and exempt supplies. For a UAE business the domestic detail matters far less than the cross-border reality: exports south are generally zero-rated but only with the evidence to prove it, services follow place-of-supply and reverse-charge rules, and Omani VAT you pay is only recoverable through the right channel. Treat Oman as its own jurisdiction rather than a southern extension of the UAE, keep the two calendars separate, and confirm the current thresholds and treatments with the Oman Tax Authority — because in tax, last year’s number is not always this year’s.

Velmont Crest is a DED-licensed UAE accounting firm providing advisory, preparation and compliance support to SMEs across Dubai mainland and the free zones — from VAT and corporate tax through to monthly accounting and bookkeeping and cross-border VAT advisory. Read more on our insights hub or get in touch via our contact page.

Disclaimer: Velmont Crest is a DED-licensed accounting firm providing advisory, preparation and compliance support services. We are not a law firm, a tax authority, or a registered tax agent representing clients before the Oman Tax Authority or the UAE Federal Tax Authority. Oman and UAE VAT rules, thresholds and treatments change and depend on your specific facts — verify current requirements with the Oman Tax Authority and the UAE Federal Tax Authority, and consult a licensed professional for advice specific to your circumstances before acting.

References

• Oman Tax Authority — VAT
• Oman Tax Authority
• UAE Federal Tax Authority — VAT
• UAE Ministry of Finance