Fawtara timeline and deadlines in Oman

Fawtara's deadlines are now set in law. OTA Decision No. 189/2026, which amends the VAT Executive Regulations and was published in the Official Gazette (issue 1660) on 9 August 2026, splits VAT-registered businesses into two groups by the value of their annual supplies.

The two statutory dates

Group	Mandatory from	Who is in it
1	1 April 2027	Taxable persons whose annual supplies exceed OMR 5 million.
2	1 October 2027	Taxable persons whose annual supplies do not exceed OMR 5 million.

A business with annual supplies of exactly OMR 5 million is in the October group, because the April group covers supplies that exceed the threshold.

The Decision uses the words "annual supplies". It does not itself say whether that means total or only taxable supplies, or which twelve months are counted. The OTA rollout checker is the place to confirm your group, and its answer for your VAT number is the one that counts.

This replaces the earlier phased roadmap that appeared in OTA FAQs and in many provider articles. If a source still describes three or four phases, it predates the Decision.

The Decision also allows the Chairman of the Tax Authority to grant an exemption from issuing electronic tax invoices for a period the Authority sets. Treat that as a case-by-case exception, not a planning assumption.

How to confirm your group

Use the OTA rollout-checking portal with your VATIN. It is the authoritative confirmation of which group a specific taxpayer belongs to.

A practical sequence:

1. Confirm the business is VAT registered.
2. Check your group on the OTA portal.
3. Save the result internally with the date checked.
4. Assign one person to monitor OTA updates and service-provider notices.
5. Work backward from your date with a readiness plan.

Why the runway matters

The April group has the shorter runway, and six months is not a long time for businesses with multiple invoice sources. A company may need to map data from accounting software, ERP, POS systems, Excel templates, branch systems, and manual processes. It may also need to choose a service provider, validate XML output, train staff, and change how invoice corrections are handled.

Waiting until the final month creates avoidable risk. The October group has more time, and the best use of it is to remove uncertainty early rather than to start late.

The OTA FAQ also says it will notify rollout groups at least six months before their go-live date. With the dates now fixed in law, treat a notice as confirmation rather than as the signal to start.

Suggested preparation timeline

This is a working readiness model for a VAT-registered business once it has confirmed its group.

Timing before go-live	What to finish
6 months	Confirm rollout group, appoint an internal owner, list invoice systems, and open provider conversations.
5 months	Map invoice types, customer types, tax categories, credit notes, debit notes, exports, and imports.
4 months	Map required fields and identify missing or inconsistent data.
3 months	Select the provider path and start technical integration or export-template changes.
2 months	Test validation, corrections, archiving, and staff workflows.
1 month	Run a go-live rehearsal and freeze any process changes that are not essential.

Common mistakes

• Relying on an older phased timeline instead of the dates set by Decision 189/2026.
• Treating any public timeline as a substitute for checking the VATIN.
• Assuming a PDF invoice is enough.
• Waiting to clean customer, tax, and item data until integration starts.
• Choosing a provider path before understanding invoice volume and system complexity.
• Publishing penalty amounts or provider claims from non-official sources.

What is not confirmed yet

Do not build decisions around unsupported claims. The OTA has not yet published:

• Guidance on how it will apply the OMR 500–5,000 fine that the VAT Executive Regulations already set for invoicing failures (penalties guide).
• Exact QR/TLV rules.
• Exact validation-rule counts.
• ASP pricing or wholesale costs.

The OTA does now publish an official list of accredited service providers on the Fawtara portal. Use it as the authoritative check that a provider is accredited.

Next step

Check your VATIN on the OTA rollout-checking portal to confirm whether your date is 1 April 2027 or 1 October 2027. Then work backward from it: map invoice data, choose a provider path, test validation, and train the team that issues invoices.