What the invoice must contain
Requirements differ in detail between countries, but the core of a commercial or tax invoice is consistent: seller and buyer identity, a sequential number, an issue date, line descriptions, and amounts before and after tax.
Oman VAT is 5%, and the rial is a three-decimal currency.
- Seller name and VATIN
- A sequential, non-repeating invoice number
- Issue date
- Line descriptions, quantities and prices
- Amount before tax, tax amount, and total including tax
Country notes
Tax invoices should be issued in Arabic; an English translation may be shown alongside.
Arabic is required on an Omani invoice
Article 144 of the Executive Regulation of the VAT Law requires a tax invoice to be issued in Arabic, with a translation into another language permitted alongside it.
An English-only invoice therefore does not satisfy the requirement, even when your customer reads no Arabic. Turn on the bilingual switch and every label prints in Arabic with its English equivalent in the same field, Arabic first.
The Omani rial: three decimals, not two
The rial divides into 1000 baisa, so it carries three decimal places. Tools built on two produce rounding differences that never show on a single line, only when the lines are summed and compared to the total.
The tool sets the decimals automatically when Oman is selected — on screen, in the PDF, in the tax arithmetic itself, and in the amount written out in words.
Privacy
All arithmetic and PDF generation happen in your browser. Your invoice and customer data are never uploaded, and the tool keeps working offline once the page has loaded.
Frequently asked questions
Is Arabic fully supported?
Yes. The interface is Arabic-first with a native RTL layout, and the PDF preserves correct Arabic letter shaping.
Can I change the currency and its decimals?
The currency follows the selected country, including the three-decimal Gulf currencies (KWD, BHD, OMR).
What is the VAT rate in Oman?
5%, in force since 16 April 2021.
Is an English-only invoice accepted in Oman?
No. Article 144 of the Executive Regulation makes Arabic the language of the tax invoice; English is a translation alongside it, not a replacement.
When must I register for VAT?
Registration follows annual supplies: the mandatory threshold is OMR 38,500 and the voluntary threshold OMR 19,250. Confirm the current figure with the Oman Tax Authority before registering.