Oman Fawtara E-Invoicing: 2027 Guide & Requirements

Fawtara (فوترة) is Oman's national e-invoicing system, run by the Oman Tax Authority (OTA). Under Decision No. 189/2026, VAT-registered businesses must issue structured electronic tax invoices from 1 April 2027 if their annual supplies exceed OMR 5 million, and from 1 October 2027 if they do not. Once your date arrives, a paper or PDF invoice no longer counts as a valid tax invoice.

That is the short version. The rest of this guide covers the parts that most articles skip: how to work out your exact date using the OTA's own test, what your invoices and ERP must be able to do, what it costs, and a six-month plan a small or mid-sized business can follow.

Everything here was checked against OTA documents and the VAT Law on 20 September 2026. Sources are listed at the end.

If you read that small businesses have until August 2027, that information is out of date. The OTA's original four-phase plan was replaced in August 2026 by two dates based on annual supplies. Some guides, and an older page on the OTA's own portal, still show the old schedule. Details are in the timeline section below.

Oman Fawtara E-Invoicing: 2027 Guide & Requirements

Key takeaways

Two legal dates: 1 April 2027 (annual supplies above OMR 5 million) and 1 October 2027 (everyone else who is VAT-registered).
No legal obligation starts before 1 April 2027. The pilot with about 100 large taxpayers began in August 2026, and early adoption is voluntary.
You don't connect to the tax authority directly. Every invoice goes through an OTA-accredited service provider. The OTA itself charges no fees; providers set their own prices.
You may not have to replace your ERP. The OTA says ERP systems can be retained, provided your ERP can produce invoices in the required format and connect to your provider.
The format is structured XML following the Oman PINT specification. A PDF is not an e-invoice.
Keep records for 10 years after the end of the tax year in which the return is filed (15 years for real estate), under Article 70 of the VAT Law.

What is Fawtara?
The timeline: what changed in August 2026
Which date applies to your business?
What changes on your invoices
Do you need to replace your ERP?
Choosing an accredited service provider
What it costs
Penalties and legal exposure
What happens if your supplier is not onboarded yet?
A six-month readiness plan
Fawtara vs Saudi Arabia's ZATCA
Seven myths about Oman e-invoicing
How RUKN fits
Frequently asked questions
Sources

What is Fawtara?

Fawtara is Oman's national e-invoicing programme. Instead of emailing a PDF, a business creates invoice data in a standard XML format, sends it through an accredited service provider, and the required tax data reaches the OTA automatically. The OTA defines e-invoicing as issuing, storing, submitting and exchanging invoices electronically in a prescribed format, and states plainly that a PDF invoice is not an e-invoice.

Fawtara uses the Peppol "five-corner" model. Five parties take part in every transaction:

Corner: 1 — Who: You (the supplier) — What they do: Create the invoice in your ERP or invoicing system
Corner: 2 — Who: Your accredited service provider — What they do: Validates the invoice against Oman's rules and sends it on
Corner: 3 — Who: Your customer's service provider — What they do: Receives the validated invoice and delivers it
Corner: 4 — Who: Your customer (the buyer) — What they do: Receives the structured invoice
Corner: 5 — Who: Oman Tax Authority — What they do: Receives the tax data for reporting

Three practical consequences follow from this design:

You never connect straight to the OTA. You connect to a service provider, and taxpayers can link to a provider through the Fawtara portal. You can hold one provider at a time and switch later.
Providers must meet strict criteria. They need a local presence in Oman, must pass the Peppol test suites, and must use the OTA's central directory (SMP) rather than running their own.
Your data must fit a national specification. PINT OM is Oman's adaptation of the Peppol PINT standard, and the OTA tells taxpayers to use it to map their ERP fields.

Peppol is a network and specification framework, not a piece of software. Your ERP does not "become" Peppol. It produces compliant data, and an accredited provider carries it across the network.

The timeline: what changed in August 2026

Oman replaced its four-phase e-invoicing plan with two mandatory dates: 1 April 2027 for taxpayers with annual supplies above OMR 5 million, and 1 October 2027 for all other VAT-registered taxpayers. The change came through Tax Authority Decision No. 189/2026, published in Official Gazette No. 1660 on 9 August 2026, which amends the VAT Executive Regulations. The OTA's FAQ, updated on 31 August 2026, confirms that the decision has been released.

Key events, in order:

Date: 7 January 2026 — What happened: OTA approved as a Peppol Authority
Date: April 2026 — What happened: PINT OM specification published
Date: May 2026 — What happened: OTA launched an online rollout checker
Date: 28 June 2026 — What happened: Fawtara platform Release 2 went live; service provider accreditation opened
Date: August 2026 — What happened: Pilot began for about 100 large taxpayers, with a grace period to the end of October 2026
Date: 9 August 2026 — What happened: Decision No. 189/2026 published
Date: 31 August 2026 — What happened: OTA updated its Fawtara FAQ
Date: 1 April 2027 — What happened: Mandatory for annual supplies above OMR 5 million
Date: 1 October 2027 — What happened: Mandatory for all other VAT-registered taxpayers

Old plan versus current law

Group: About 100 selected large companies — Older four-phase plan: From August 2026 — Decision No. 189/2026: Pilot from August 2026, ahead of any legal duty
Group: Large VAT-registered companies — Older four-phase plan: From February 2027 — Decision No. 189/2026: Annual supplies above OMR 5 million: 1 April 2027
Group: Remaining VAT-registered taxpayers, including SMEs — Older four-phase plan: From August 2027 — Decision No. 189/2026: Annual supplies of OMR 5 million or less: 1 October 2027
Group: Government entities — Older four-phase plan: Later, date not announced — Decision No. 189/2026: Not addressed by the decision

Why do sources disagree?

Because regulators update documents at different speeds. An analysis by e-Invoice.app notes that the OTA's HTML e-invoicing FAQ page still lists the four phases, and the decision replaced that schedule. When two sources conflict, follow the newer legal instrument (the decision) and the OTA's most recent FAQ document. Then check the OTA e-invoicing portal for updates before you plan a budget.

Two more points worth knowing:

Nothing is legally required before 1 April 2027, but any business may opt in early.
The OTA says it contacts rollout participants at least six months before onboarding. If you are in the April 2027 group, do not wait to be contacted.

Which date applies to your business?

Your date depends on annual supplies. The OTA counts you in the April 2027 group if your supplies exceed OMR 5 million in the year to 31 March 2027, or if you expect them to exceed OMR 5 million in the year from 1 April 2027. If neither is true, your date is 1 October 2027.

This is the OTA's own test, taken from its Fawtara FAQ. Most public guides reduce it to "above or below OMR 5 million", which hides the forward-looking half of the test.

What counts toward the OMR 5 million:

Your taxable supplies at the 5% and 0% rates, excluding sales of capital assets
The value of goods and services you receive under the reverse charge mechanism
Your intra-GCC supplies of goods and services

This mirrors how Article 56 of the VAT Law counts supplies for registration.

Two special cases:

VAT groups are assessed at group level, not per member.
Non-resident taxpayers count only supplies made in Oman.

Worked examples

These are illustrative businesses, not real companies.

Business: Muscat trading company — Supplies, Apr 2026 to Mar 2027: OMR 3.8 million — Expected, Apr 2027 to Mar 2028: OMR 5.4 million — Your date: 1 April 2027 — Why: Passes the forward-looking test
Business: Retail group with several branches — Supplies, Apr 2026 to Mar 2027: OMR 6.2 million — Expected, Apr 2027 to Mar 2028: OMR 6.5 million — Your date: 1 April 2027 — Why: Passes both tests
Business: Consulting firm — Supplies, Apr 2026 to Mar 2027: OMR 0.9 million — Expected, Apr 2027 to Mar 2028: OMR 1.2 million — Your date: 1 October 2027 — Why: Passes neither test
Business: VAT group of three companies (OMR 2.1m + 1.9m + 1.8m) — Supplies, Apr 2026 to Mar 2027: OMR 5.8 million at group level — Expected, Apr 2027 to Mar 2028: Similar — Your date: 1 April 2027 — Why: Group total exceeds the threshold, even though no member does

If you are near the line: the OTA's wording is "exceeds OMR 5,000,000", so a business at exactly OMR 5 million falls outside the April test on that wording. Some guides write "5 million or more". If you are this close, get written confirmation from the OTA.

The OTA's rollout checker lets you enter your VATIN to see your phase. It launched in May 2026, before Decision No. 189/2026, so cross-check the result against the test above.

What changes on your invoices

From your date, tax invoices must be structured XML data that follows the PINT OM specification, sent through an accredited service provider. B2B invoices must be submitted in real time and B2C invoices within 24 hours. The list below summarises the OTA's published rules.

Topic: Format — What the OTA says: XML is the mandatory structured format; a PDF is not an e-invoice — What it means in practice: Your system must generate XML, not just print PDFs
Topic: Validity — What the OTA says: Paper invoices can still be issued, but only e-invoices are valid for tax purposes — What it means in practice: Treat paper as a courtesy copy
Topic: Validation — What the OTA says: The service provider validates against Oman's Schematron rules; the taxpayer stays responsible for compliance — What it means in practice: A provider catches errors, but you own the result
Topic: Timing — What the OTA says: B2B real time; B2C within 24 hours; B2C starts at the same time as B2B — What it means in practice: Retail and hospitality need fast, automated flows
Topic: Consumers — What the OTA says: QR code required on the human-readable invoice for all B2C transactions, generated by the taxpayer — What it means in practice: Your printed or displayed invoice needs a QR code
Topic: B2C batching — What the OTA says: Consolidated B2C invoices are not allowed — What it means in practice: One e-invoice per sale, not daily summaries
Topic: Corrections — What the OTA says: Adjust with an electronic credit or debit note — What it means in practice: Build a correction process, not an "edit invoice" habit
Topic: Imports — What the OTA says: Report as self-billed invoices — What it means in practice: Your buyer-side process needs to generate them
Topic: Exports — What the OTA says: Invoice the customer as usual; tax reporting flows from you to your provider to the OTA — What it means in practice: You report even though the buyer is not on the network
Topic: Certificate — What the OTA says: A digital certificate is required and provided through OpenPeppol — What it means in practice: Ask your provider who handles it
Topic: History — What the OTA says: Historical invoices do not need to be submitted to the OTA — What it means in practice: No need to upload past invoices

The amended Article 143 also brings supplies to consumers, deemed supplies and advance payments within the electronic invoice requirement, so prepayment invoices need the same treatment.

Record keeping

Article 70 of the VAT Law requires you to retain tax invoices and accounting records for 10 years following the end of the tax year in which the return is filed, and 15 years for real-estate records. The OTA FAQ adds that storing and archiving e-invoices is the taxpayer's responsibility. Some guides state a five-year retention period. The law text says ten.

Do you need to replace your ERP?

Not necessarily. The OTA states that ERP systems can be retained, depending on the arrangement the taxpayer has with its accredited service provider. What matters is whether your ERP can produce compliant data and connect to a provider. The OTA's accreditation programme applies to service providers, not to ERP products.

There are three realistic routes:

Native connection: your ERP already integrates with an accredited provider and produces PINT OM data.
Connector or middleware: a separate tool converts your ERP's invoice data and hands it to the provider.
Provider's own tools: some providers offer their own invoicing interface for businesses without a suitable ERP.

The route matters less than the answers you get in writing. Use these questions with your ERP vendor or implementation partner:

Which accredited providers does your system connect to today? (Check them against the OTA list.)
Can it generate PINT OM XML for invoices, credit notes, debit notes and self-billed import invoices?
How are B2C QR codes created and printed on the human-readable invoice?
Can it send B2B invoices in real time and B2C within 24 hours, and show delivery and rejection status?
What happens when a provider rejects an invoice, and how are corrections handled?
Where are XML files archived, and can they be linked to the accounting entry for 10-year retention?
Which master-data fields commonly fail validation (buyer VATIN, tax category, units of measure, item codes), and can the system enforce them at entry?
Can we change provider later without losing history?
What will it cost: one-off, subscription, per-invoice? Who pays the provider?
Will you commit in writing to a go-live date before our rollout date, including support during testing?

If you are still comparing ERP systems, our guides on choosing an ERP in Oman and on ERP versus accounting software cover the wider decision. Add e-invoicing readiness to your shortlist criteria now.

Choosing an accredited service provider

Only providers on the OTA's accredited list can carry Fawtara invoices, so start there. The official list is updated as accreditations progress. As of July 2026, about a dozen providers had completed accreditation, and more have followed.

What the OTA requires of providers, and why it matters to you:

Local presence in Oman, so support and data handling sit inside the Sultanate
Passing the Peppol eDelivery and PINT OM test suites, which proves technical readiness
Data protection duties: confidentiality, encryption and security controls
One provider per taxpayer at a time, with the option to disconnect and switch

Compare providers on integration with your ERP, support in Arabic and English, archiving, error handling, uptime commitments and total price. A large company may qualify to act as its own provider, but that is a heavy path meant for organisations with substantial technical teams.

What it costs

The OTA charges taxpayers no fees for Fawtara. Service providers set their own pricing, which may be a subscription, a per-transaction fee, or another model. The rest of your budget depends on your starting point:

Cost area: Service provider — What drives it: Invoice volume, pricing model, support level
Cost area: ERP work — What drives it: Whether your ERP already supports PINT OM or needs a connector or upgrade
Cost area: Data clean-up — What drives it: Missing or wrong customer VATINs, item codes and units of measure
Cost area: Testing and training — What drives it: Number of invoice types, users and branches
Cost area: Archiving — What drives it: Storage and retrieval over the 10-year retention period

We are not quoting figures here because no official price list exists and provider prices differ. Ask for quotes that separate one-off and recurring costs. Compare them against the cost of manual invoice handling and rejected invoices.

Penalties and legal exposure

Oman has not yet published an e-invoicing-specific penalty schedule. The OTA FAQ says penalties will apply according to VAT legislation once the mandate begins, and Decision No. 189/2026 attaches no fines of its own.

The existing law already covers invoicing duties. Article 100 of the VAT Law provides imprisonment of two months to one year, a fine of OMR 1,000 to OMR 10,000, or either, for deliberately refraining from issuing a tax invoice when required, or from keeping tax invoices for the required period. A court may double the penalty for repeat offences. Article 103 also allows administrative penalties to be set in the Regulations.

Note the word "deliberately". Article 100 targets intentional breaches, not honest mistakes. Even so, a business that knows its date and takes no action is on weak ground.

The decision also adds two relevant provisions, according to Comarch's legal summary:

Taxpayers carry their own responsibility for system security, business continuity and data recovery.
The OTA Chairman may grant a temporary exemption on application, conditional on filing VAT returns and paying tax on time.

What happens if your supplier is not onboarded yet?

You can still claim input VAT. The OTA says a VAT-registered seller who has not yet joined the rollout may keep using its existing invoicing method, and the buyer can claim input VAT under the current eligibility rules. This matters for SMEs: your suppliers will join at different times between April and October 2027, and you should not have to reject their invoices in the meantime.

If a seller is not VAT-registered, it is not required to join Fawtara and should not charge VAT. The OTA says companies can report any invoices that include VAT from non-registered sellers.

A six-month readiness plan

Start six months before your date. The OTA itself uses a six-month lead time for contacting rollout participants. The plan below is our suggestion, not an OTA requirement.

Month before go-live: 6 — What to do: Confirm your date using the OMR 5 million test and the OTA checker. Name an owner. List every invoice type: B2B, B2C, credit notes, prepayments, imports, exports.
Month before go-live: 5 — What to do: Clean master data: customer legal names, VATINs, addresses, item codes, units of measure, tax categories. Ask your ERP vendor the ten questions above.
Month before go-live: 4 — What to do: Shortlist providers from the OTA list. Choose your route (native, connector, provider tools). Get quotes that split one-off and recurring costs.
Month before go-live: 3 — What to do: Select a provider and link through the Fawtara portal. Map your ERP fields to PINT OM. Decide where XML files will be archived.
Month before go-live: 2 — What to do: Test with sample invoices: standard, zero-rated, credit note, prepayment, B2C with QR code. Train finance and sales staff.
Month before go-live: 1 — What to do: Run a parallel period. Fix rejections. Write an exception process for provider downtime and validation failures.
Month before go-live: Go-live — What to do: Monitor daily for the first weeks. Review rejection reasons weekly.

For the April 2027 group, month six is now (October 2026). For the October 2027 group, month six is April 2027. If you are close to the threshold, plan as if you are in the earlier group until the OTA confirms otherwise.

Fawtara vs Saudi Arabia's ZATCA

Oman and Saudi Arabia both mandate e-invoicing, but the models differ. Fonoa's comparison describes Oman as using a decentralised Peppol five-corner model, while Saudi Arabia's ZATCA framework is a clearance model with different technical and reporting requirements.

If you operate in both countries, do not assume one integration will cover both. Ask your ERP vendor to show each country's flow separately, with separate testing.

Seven myths about Oman e-invoicing

Myth: "Small businesses have until August 2027." — Reality: Under Decision No. 189/2026 the dates are 1 April 2027 (supplies above OMR 5m) and 1 October 2027 (all others).
Myth: "An emailed PDF is fine." — Reality: The OTA states that a PDF invoice is not an e-invoice.
Myth: "My ERP must be certified by the OTA." — Reality: The OTA accredits service providers. Its FAQ says ERP systems can be retained.
Myth: "I connect my ERP directly to the tax authority." — Reality: Invoices travel through an accredited service provider.
Myth: "I only need to keep invoices for five years." — Reality: Article 70 says 10 years after the tax year of the return, and 15 for real estate.
Myth: "If my supplier is not on Fawtara, I lose input VAT." — Reality: The OTA says the buyer can still claim input VAT under current rules.
Myth: "Oman uses the same system as Saudi Arabia." — Reality: Oman uses a Peppol five-corner model. Saudi Arabia uses ZATCA's clearance model.

How RUKN fits

Fawtara is partly a tax topic and mostly a data and workflow topic. Invoices that start from clean customer records, controlled approvals and a clear audit trail are far easier to convert into compliant XML. That is where a connected ERP helps.

Here is what RUKN provides today that supports an e-invoicing programme:

A structured quote-to-order-to-invoice flow. Sales & Customer Management keeps customer records, pricing and credit controls in one place, so invoice data starts clean.
VAT automation and reporting. Accounting & Finance includes automated VAT calculations and audit trails for every transaction.
Control over who does what. Operations & Workflow Control adds role-based access and multi-level approvals, which supports internal control over who can issue, change and approve invoices.
Visibility. Reporting & Management Insights provides dashboards and exports to Excel and PDF, useful for reconciling what was issued with what was reported.
Compliance tooling. Compliance & Controls lists ZATCA e-invoicing (Fatoorah) compliance and VAT reporting, which matters if you also sell in Saudi Arabia.

About Fawtara specifically: RUKN's website currently lists e-invoicing compliance for Saudi Arabia's ZATCA. If you need Fawtara-ready invoicing, meaning PINT OM output and a connection to an accredited service provider, for your rollout date, ask the RUKN team for the current status and timeline, and get the answer in writing, as you should with any vendor.

Who RUKN suits, and who it may not. RUKN is built for small and growing businesses that want accounting, sales, purchasing, inventory and reporting in one system, with plans from a published starter price. Very large organisations with complex multi-entity structures, especially those already in the pilot group, usually run dedicated integration projects and should evaluate accordingly.

Want to check your readiness? Talk to RUKN about e-invoicing readiness and bring your rollout date and the ten questions above.

Frequently asked questions

Is e-invoicing mandatory in Oman?

Yes. Decision No. 189/2026 makes electronic tax invoices mandatory for VAT-registered businesses, from 1 April 2027 for annual supplies above OMR 5 million and from 1 October 2027 for all others. Nothing is required before 1 April 2027, though early adoption is allowed. Non-VAT-registered businesses are not required to join the network.

When does e-invoicing start for small businesses in Oman?

Most small businesses fall in the 1 October 2027 group. The exception is a business whose supplies exceed OMR 5 million in the year to 31 March 2027, or are expected to exceed it in the following year. Those businesses start on 1 April 2027. Use the worked examples above and the OTA rollout checker.

What is PINT OM?

PINT OM is Oman's version of the Peppol International (PINT) specification. It defines the data fields, validation rules and code lists for Oman's e-invoices. The OTA tells taxpayers and service providers to use it as the guideline for mapping ERP data. Your provider validates each invoice against it.

Do I need an accredited service provider?

Yes. Invoices must pass through a provider accredited by the OTA, and you cannot connect directly to the tax authority. The OTA publishes the accredited list on the Fawtara portal. You can connect to one provider at a time and switch later if needed.

Do I have to replace my ERP or accounting software?

Not necessarily. The OTA says ERP systems can be retained, depending on your arrangement with your service provider. Your software must still produce compliant XML data and connect to the provider, either directly or through a connector. Ask your vendor the ten questions above before deciding.

How much does Fawtara cost?

The OTA charges no fees. Service providers set their own pricing, which can be subscription-based, per-transaction or another model. Your real cost also includes ERP changes, data clean-up, testing, training and archiving. Request quotes that separate one-off and recurring costs.

Are retail and consumer sales included?

Yes. B2C is implemented at the same time as B2B. Consumer invoices need a QR code on the human-readable version, consolidated B2C invoices are not allowed, and B2C invoices must be submitted within 24 hours. Retail and hospitality businesses should test high-volume flows early.

What is the penalty for not issuing e-invoices?

No e-invoicing-specific penalty schedule has been published. Under Article 100 of the VAT Law, deliberately refraining from issuing a required tax invoice can lead to imprisonment of two months to one year, a fine of OMR 1,000 to 10,000, or either. Watch the OTA for final penalty guidance.

How long must I keep e-invoices?

Ten years after the end of the tax year in which the related return is filed, and 15 years for real-estate records, under Article 70 of the VAT Law. The OTA FAQ says archiving is the taxpayer's responsibility, so agree with your provider and ERP vendor who stores the XML files.

Your next steps

This week: work out your date using the two-part OMR 5 million test.
This month: name an owner, list your invoice types, and start cleaning customer and item data.
Next 60 days: ask your ERP vendor the ten questions and shortlist providers from the OTA list.
Then: follow the six-month plan to your go-live date.

E-invoicing is coming for every VAT-registered business in Oman. The businesses that treat it as a data and workflow project, rather than a last-minute tax task, will have the smoothest transition.

Get a RUKN quote · Explore RUKN's compliance capabilities

Sources and how we checked

Facts in this guide were checked on 20 September 2026. Where the OTA has not yet updated a page, we followed the most recent legal instrument and OTA document, and we say so in the text.

Primary sources (Oman Tax Authority and legislation)

Fawtara (E-invoicing) Frequently Asked Questions, updated 31 August 2026
OTA e-invoicing FAQ page (still shows the older four-phase plan)
Fawtara portal and accredited service provider list
OTA rollout checker
VAT Law (Royal Decree 121/2020), Articles 56, 70, 100 and 103
PINT OM specification (OpenPeppol)

Secondary sources (reporting on Decision No. 189/2026 and the programme)

Comarch: Oman Revises Mandatory E-Invoicing Implementation Timeline, 20 August 2026
e-Invoice.app: Oman Puts Its e-Invoicing Dates in Law, updated 9 September 2026
Banqup: Oman Fawtara e-invoicing status guide, updated 20 July 2026
Fonoa: Oman E-Invoicing Requirements, 29 June 2026
ClearTax: E-Invoicing in Oman guide, updated 10 August 2026 (Peppol Authority approval date and PINT OM publication)

This guide is general information, not legal or tax advice. Confirm your position with the Oman Tax Authority or a qualified adviser. We will update it as the OTA publishes final penalty guidance and further technical requirements.

What Is E-Invoicing in Oman? Everything Businesses Need to Know Before 2027