Oman gazettes e-invoicing dates that contradict its own Fawtara FAQ

What changed in detail

Oman’s Tax Authority issued Decision No. 189/2026 amending provisions of the Executive Regulations of the VAT Law, published in Official Gazette Issue 1660 and on the Ministry of Legal Affairs legislation portal on 9 August 2026, and signed on 3 August 2026. Article 1 of the Decision replaces the text of Article 143 and of the second paragraph of Article 146; Article 2 adds Articles 143 bis, 143 bis (1) and 143 bis (2); and a new item (11) is added to Article 147, all of the Executive Regulations issued by Decision No. 53/2021 under the VAT Law (Royal Decree No. 121/2020). The replaced second paragraph of Article 146 requires the simplified tax invoice to be issued within the deadlines specified in Article 143. The amended Article 143 requires a taxable person to issue the tax invoice in an approved and secured electronic format carrying a unique number for each invoice. Under the Decision’s commencement article, the requirement applies from 1 April 2027 to taxable persons whose annual supplies exceed OMR 5 million, and from 1 October 2027 to those whose annual supplies do not exceed OMR 5 million.

What it means

These dates and the OMR 5 million threshold do not match the Oman Tax Authority’s own live Fawtara FAQ, recorded in om-einvoicing-fawtara-phases: that document names an August 2026 pilot of 100 selected large companies and says only that “subsequent rollouts will follow according to the timeline that will be prescribed in the legislation” — no February 2027, no August 2027, no turnover split of any kind. Decision 189/2026 is that legislation, now issued, and it sets different mechanics: two dated tiers, 1 April 2027 and 1 October 2027, split on a hard OMR 5 million turnover line rather than a hand-picked participant list.

The conflict is the substance of this record, not an incidental detail. A gazetted Ministry of Legal Affairs decision governs over a Tax Authority FAQ page regardless of which one is easier to find or more recently visited — plan against 1 April 2027 (or 1 October 2027 below the OMR 5 million line), not against whatever the Fawtara FAQ currently says. Treat the FAQ as due for an update rather than as the authority on timing, and re-check it once it catches up with the Decision.