A practical guide to VAT in Oman.

Oman introduced VAT on 16 April 2021 at a single standard rate of 5%. It applies to most goods and services supplied in Oman, with a defined list of zero-rated and exempt categories. The Oman Tax Authority (OTA) administers the regime under Royal Decree 121/2020 and its Executive Regulations.

Mandatory registration applies when annual taxable supplies exceed OMR 38,500. Voluntary registration is available between OMR 19,250 and OMR 38,500. Non-resident suppliers making taxable supplies in Oman must register from the first riyal — there is no threshold for non-residents. New businesses should monitor the rolling 12-month and forward-looking 30-day tests.

Zero-rated means VAT applies at 0% and you can still recover input VAT on costs. The main zero-rated categories include: exports of goods and services outside the GCC implementing states, international transport, supply of investment-grade gold/silver/platinum (≥99% purity, tradable), specified medicines and medical equipment listed by the OTA, and supplies of crude oil, oil derivatives, and natural gas.

Exempt means no VAT on the sale and no input VAT recovery on related costs. Common exempt categories: most financial services where consideration is implicit (e.g. interest), residential property leases, healthcare and educational services as specified, and the resale of bare land. Mixing exempt and taxable activities triggers partial-exemption input VAT apportionment.

A valid tax invoice must show: the words "Tax Invoice", a sequential invoice number, the issue date and supply date if different, the supplier's name/address/TRN, the customer's name/address (and TRN if registered), description of goods/services, taxable amount, VAT rate, VAT amount, and total payable. Amounts may be in OMR or another currency provided the OMR equivalent and exchange rate are shown. Simplified invoices are allowed for retail supplies under OMR 500.

Most registered businesses file quarterly returns. The return and any payment are due within 30 days of the end of the tax period. Returns are filed online through the OTA portal at tms.taxoman.gov.om. Late filing and late payment both attract administrative penalties — file the return on time even if you cannot pay immediately.

Books, invoices, customs documents, contracts, and supporting records must be kept for 10 years from the end of the relevant tax period. Records relating to immovable property must be kept for 15 years. Electronic records are accepted provided they are auditable and retrievable on request.

When you import services from outside Oman or buy goods/services from a non-registered foreign supplier, you self-account for VAT under the reverse charge mechanism. You declare both output and input VAT on the same return — net zero in most cases, but the entry must still be made.

Late registration, late filing, late payment, incorrect returns, and failure to issue a compliant tax invoice all attract administrative penalties under the Executive Regulations. Penalty amounts are fixed in some cases and a percentage of the underpaid tax in others, with daily accrual on overdue tax. Tax evasion can attract criminal sanctions in addition to fines.

Hassab keeps your VAT codes correct on every bill and invoice, generates an OTA-compliant tax invoice format, drafts your quarterly return from your transactions, flags missing TRNs and unusual VAT amounts before filing, and retains every document under audit-trail rules. You file from a checked, reviewed draft instead of building one from scratch.