Oman VAT registration for online stores and apps: the OMR 38,500 threshold, foreign sellers, invoices and records

The rules, and where to read them

Oman's VAT is imposed by the Value Added Tax Law, issued by Royal Decree 121/2020, and administered by the Tax Authority. Everything below comes from documents the Authority publishes on its own portal:

• The VAT Law: articles 55 to 66 on registration, 67 to 74 on invoices, records and returns, and 100 to 103 on penalties.
• Decision No. 1 of 2021 of the Chairman of the Tax Authority, dated 4 January 2021, which sets the two thresholds. It is a scanned Arabic page, so there is no English text to copy.
• The VAT Taxpayer Guide on Electronic Commerce.pdf/70d52b04-4177-2fe8-2d1c-836d6d831466?t=1733169614944), Version 1 of June 2023: foreign sellers, goods, electronically supplied services and marketplaces. The Authority says its guides are not binding on the Authority or on taxpayers.
• The portal's VAT Law and Regulations page, where the Executive Regulations (Decision 53 of 2021 and its amendments) are listed. Their PDFs are published in Arabic only and did not extract cleanly for us, so this guide does not quote them. Where the regulations decide a point, such as tax periods, invoice contents and administrative penalties, we say so rather than guess.

When a business in Oman must register

Article 55 of the Law requires every person who carries on an activity and has a place of residence in Oman to register in either of two cases:

• Looking back: the value of supplies at the end of any month, plus the eleven months before it, exceeds the mandatory registration threshold.
• Looking forward: the value of supplies expected at the end of any month, plus the eleven months after it, exceeds the threshold.

The two thresholds

The Law leaves the figures to the Authority. Decision 1 of 2021 sets them, and the e-commerce guide repeats the first one:

• The test is a rolling 12 months checked at the end of every month, not a calendar year. A store that grows past the figure in March is liable in March, not at year end.
• Because the forward test looks 12 months ahead, a launch plan or signed contract that will take you over OMR 38,500 can trigger registration before the sales arrive.

What counts towards the threshold

Article 56 counts three things: taxable supplies, which means both standard-rated and zero-rated sales, except sales of capital assets; goods and services you receive that are subject to the reverse charge; and intra-GCC supplies of goods and services. The e-commerce guide lists the same three.

For an online store that means product sales including any delivery you charge, exports (zero-rated but counted), and services bought from abroad on which you must account for Omani VAT yourself. For an app or SaaS business it means subscription and in-app revenue from Omani customers plus the reverse-charge services you buy, such as hosting, advertising and software from foreign suppliers.

Article 59 also lets the Authority register related persons that run similar or linked activities if their combined annual supplies exceed the mandatory threshold, so splitting one business across several companies does not reset the count.

Voluntary registration from OMR 19,250

Article 61 lets a resident business that is not obliged to register apply voluntarily when its supplies or its expenses exceed the voluntary threshold over the same rolling 12 months, looking back or forward. Counting expenses matters for startups: a store that has spent heavily on its build, stock and marketing but has not sold much can still qualify, and the Authority's e-commerce guide has a section on deducting input tax, so ask your adviser what you can recover.

The trade-off is the full set of obligations from day one: tax invoices, records, returns and the 5% on your sales. If most customers are consumers who cannot recover VAT, registering early either raises your prices or cuts your margin, so run both numbers with your accountant.

Foreign online stores and apps: no threshold

Article 57 of the Law requires a person with no place of residence in Oman to register from the date they become obliged to pay the tax. The e-commerce guide says plainly that the mandatory registration threshold does not apply to non-resident suppliers: if a foreign seller is obliged to collect Omani VAT, it must register whatever its sales are.

The Authority says that happens when both of these are true: the seller makes supplies of goods or services whose place of supply is in Oman, and the customer is not a VAT-registered business in Oman that must account for the tax itself under the reverse charge. So a foreign seller to Omani consumers must register, while a foreign seller that sells only to VAT-registered Omani businesses has no registration duty.

Goods and services are treated differently, and the difference is the part that catches online sellers:

• Goods shipped from outside Oman: the place of supply is outside Oman. No VAT is charged on the sale, and 5% is collected as import VAT by Oman Customs on the value declared. Goods that are always zero-rated or exempt in Oman carry no import VAT.
• Goods shipped from stock already held in Oman: the place of supply is Oman, so a foreign seller with an Omani warehouse must register and charge VAT.
• Electronically supplied services to consumers: the place of supply is where the customer actually uses and enjoys the service. When the customer does not need to be in a fixed location, that is the customer's usual place of residence. The Authority lists software and updates, website and webpage hosting, online games, music and video downloads, distance education, advertising space on a website and online marketplace listings as electronic services.
• The Authority points to five signals for working out where a consumer lives: the country of the SIM or chip, the IP address, the billing address on the invoice, bank account details and other commercial information. An app that sells to consumers should keep this evidence.
• Electronically supplied services to a VAT-registered Omani business: the buyer self-accounts under the reverse charge and the foreign supplier does not register.

Registering, and what the law says about being late

Under article 62 you apply on the Authority's form and receive a registration certificate. Article 64 then requires the tax identification number on all invoices, documents and returns, and article 65 gives you 30 days to notify the Authority of any change to the data in your application. Article 66 covers deregistration, for example when you stop trading or your supplies fall below the voluntary threshold.

The Law does not give a single registration deadline in a number of days in the text we read. Article 55 makes you liable from the month you pass the test, and article 59 lets the Authority register you itself if you do not apply in time. The time limits for applying are set by the Authority and the regulations, so take the date from the portal rather than from a blog.

What the Law does say is that late registration is costly. Article 72 lets the Authority assess tax up to five years after the filing deadline, and up to ten years where registration was not made within the legal time. And article 101 makes it an offence to deliberately refrain from registering, punishable by 1 to 3 years in prison and a fine of OMR 5,000 to 20,000, or either. Under article 102 the Chairman can settle such cases before judgment by a payment of at least double the minimum fine. The administrative penalties for ordinary late registration are set by the regulations under article 103, and we have not quoted their amounts.

Tax invoices, currency and record keeping

Article 67 requires a registered business to issue a tax invoice when it makes a supply of goods or services and also when it receives payment before the supply, so a deposit or prepayment on an online order triggers an invoice. The regulations set the contents and the types of invoice.

Article 68 allows an invoice in Omani rial or in another currency. If it is in another currency, the tax amount must be calculated in rial at the average buying and selling rate the Central Bank of Oman publishes for the date the tax falls due. For a store that sells in US dollars or other currencies, that conversion has to be built into the invoice.

Article 70 requires tax invoices, accounting records, books and customs documents to be kept for 10 years after the end of the tax year in which the return was filed, and 15 years for real estate. Article 69 requires regular accounting records, and records may not be kept in a foreign currency without the Authority's written approval.

For prices, the Authority's e-commerce guide says prices published to final consumers in the local market should be shown inclusive of VAT, and that a VAT-inclusive price contains VAT equal to 5/105 of the amount paid. Its own worked example contains an arithmetic slip, so do the sum yourself: OMR 105.000 including VAT contains OMR 5.000 of tax.

Returns

Article 71 starts your first tax period on the date of registration and leaves the length of each period to the regulations, with a minimum of one month. Article 72 requires the return within 30 days after the end of the tax period, showing taxable and exempt supplies, imports, output tax, input tax claimed and the tax due. If you do not file, the Authority may assess the tax itself. Article 73 gives you 30 days to file a corrected return once you find an error, and a corrected return filed in time is treated as the original.

Marketplaces and apps that sell for others

If you run a marketplace, the e-commerce guide asks whether you act as principal or as agent. An agent that sells in the principal's name and on their behalf is not the supplier of the underlying goods: the seller remains responsible for VAT on the sale, and the marketplace charges 5% on its own commission as a separate service. A platform that sells in its own name, or buys from the seller and resells, is treated as the supplier. Article 19 of the Law is the source of this rule. If your platform sets prices, collects payment and takes the commercial risk, take advice on which side of the line you are on before you build the invoice flow.

What to change in your store or app

Most of the work after registration is in the store, not the tax portal. These are the changes we make on Omani ecommerce and app projects:

VAT and Fawtara e-invoicing

Registration is also the trigger for e-invoicing. Fawtara applies to VAT-registered businesses, from 1 April 2027 above OMR 5 million of annual supplies and from 1 October 2027 for everyone else, so a store that registers now should plan its invoice system for XML invoices from the start. See our guide to e-invoicing in Oman (Fawtara) for the dates and the technical requirements.

Setting up the rest of an Omani online business? Read our guides to building an online store in Oman, the ecommerce licence, consumer protection rules for online stores and payment gateways in Oman. Selling to the UAE as well? See UAE VAT registration for online sellers, and for Saudi Arabia, Saudi VAT registration for online sellers.

How OGB Labs helps

OGB Labs, a web and software development company in Muscat, builds and fixes the ecommerce and app side of VAT compliance: VAT-inclusive pricing, tax invoices and credit notes, a VAT number field at checkout, threshold and return reports, and the link to your accounting software. Your accountant or tax adviser handles registration and filing; we make sure the right data comes out of your store. See our ecommerce development in Oman and custom software services, or message us on WhatsApp at +968 7111 0727.