Obligations / Oman

What a company files in Oman [OM]

Every entry below is the rule as Oman publishes it. It is a reference, not a calendar: where a deadline runs from something only you know, this page says so instead of showing a date.

A template, not your deadline

This is the rule as published by the registry, checked against the primary source on the date shown. It is not your filing date. Where a deadline runs from incorporation, from a fiscal year the company itself elects, or from an event only you know about, no date can be derived here at all — the figure you see is the formula, not the answer. Extensions, transitional regimes and entity-specific exemptions are not reflected. Confirm with the registry before you rely on a date.

How the financial year is set — Fixed by statute

The year is fixed by law and not chosen by the company, and that is why the duties below can be counted at all. Article 1, item 20 of the Income Tax Law defines the tax year as «A period of twelve months commencing from the first of January and ending at the end of December of any calendar year» — the calendar year, stated as a definition and not as a default. The accounting period is a separate idea in the same law: article 31 treats it as twelve months as a rule, allows a first accounting period to run for less than twelve months or for more, «to a maximum of eighteen months», and permits a taxpayer to change its accounting period with the consent of the General Secretary. So the calendar year is the statutory position, and a departure from it is not an election the company makes on its own but a change it must obtain consent for. The consequence for this page is that the two income tax duties below carry a formula counted from the end of the year rather than a printed date, because a company in its first period, or one that has obtained consent to another period, counts from its own period end. The three remaining duties do not depend on the financial year at all: the two value added tax duties run from the end of each quarterly tax period, and the withholding duty runs from the end of the calendar month in which a payment was made.

Income Tax Law (Royal Decree 28/2009), article 1 item 20 defining the tax year as «A period of twelve months commencing from the first of January and ending at the end of December of any calendar year», and article 31 on the accounting period, a first period «to a maximum of eighteen months» and a change of accounting period with the consent of the General Secretary. English version published by the Tax Authority (Jahaz Al-Dharaib) of the Sultanate of Oman on its own taxpayer portal. · checked 2026-10-15

Annual income tax return

Formula, not a date
Filed to
The Tax Authority of the Sultanate of Oman, electronically through its taxpayer portal. Article 62 of the Income Tax Law requires returns to be filed with the Authority on the prescribed forms, and the Authority's own returns page states that the annual income tax return is «Submitted annually after the end of the fiscal year». Filing and payment are a single step in time rather than two: article 150 provides that the tax due from the return «is due on the date specified for submitting this return», so the money is owed on the same day the form is owed.
Who it applies to
Every entity in the jurisdiction
Every taxpayer files, and the obligation does not depend on having made a profit. Two qualifications in the authority's own texts matter more than any turnover floor. The first is the regime for small enterprises in Part Five bis of the Law: article 159bis 18 requires the return of an enterprise «before the lapse of three months starting from the date of the end of this year», a shorter count than the one that applies to other taxpayers, and the Authority's published questions and answers tie that three-month count to the 3% rate while tying the four-month count to the 15% rate. The limits for that regime are stated in article 159bis as registered capital not exceeding fifty thousand Omani Rials, realised gross income not exceeding one hundred thousand Omani Rials, and an average of no more than fifteen employees. The second is a narrow relief from filing in the Executive Regulation rather than the Law: article 134 of the Regulation addresses a taxpayer whose capital does not exceed twenty thousand Omani Rials, whose gross income does not exceed one hundred thousand Omani Rials, and whose average employees are eight persons or fewer. The three limbs of that test are cumulative, and no single figure of turnover decides it. The texts read do not state how either regime treats a part-year, nor how they treat a company whose tax registration has been cancelled, and neither question is answered here.
Deadline
Within 4 months after the end of the financial year.
If missed
Two separate consequences, and only one of them is a fine. For failing to submit the return, the Tax Authority's published questions and answers state that the Chairman «may impose a penalty on the taxpayer of not less than 100 RO, and not exceeding 2000 RO» — a discretionary range rather than a fixed sum, and the page does not cite the article it rests on. For tax left unpaid, the same page cites article 156 of the Income Tax Law for an additional tax «of 1% is imposed per month of the value of unpaid amount», which runs independently of whether the form itself was late. The administrative penalty provisions of the Law were not legible in the published English text, so no further amounts are asserted here.
Proof of filing
The submitted return as the Authority's portal records it, with its submission reference and date, together with the receipt for the tax paid on the same date, since article 150 ties the payment to the filing date. Where the accounts were attached, the auditor's report filed with them forms part of the same record.
Primary source: Tax Authority (Jahaz Al-Dharaib) of the Sultanate of Oman, Income Tax FAQs: a taxpayer at the 15% rate «before the expiry of four months starting from the date of the end of the tax year», a taxpayer at the 3% rate «should submit the return before the expiry of three months starting from the date of the end of the tax year»; penalty «not less than 100 RO, and not exceeding 2000 RO»; article 156 additional tax «of 1% is imposed per month of the value of unpaid amount». The three-month count for enterprises also appears in the Income Tax Law (Royal Decree 28/2009), article 159bis 18: «before the lapse of three months starting from the date of the end of this year», at https://tms.taxoman.gov.om/portal/documents/20126/1455220/income+tax+law+english.pdf. The English version of the Law published by the same Authority instead gives six months for the final return in article 64 and a provisional return in three months in article 63, at https://tms.taxoman.gov.om/portal/documents/20126/1455217/Income+Tax+Law+(English+Version).pdf; the four-month figure above is the Authority's current statement and the divergence between the two Authority sources is left unresolved.
checked 2026-10-15 · Rechecked every 24 months

Annual accounts audited by an auditor licensed in Oman and attached to the return

Formula, not a date
Filed to
The Tax Authority of the Sultanate of Oman, as an attachment to the annual income tax return rather than as a separate filing of its own. Article 64 of the Income Tax Law requires the taxpayer to attach the accounts to the final return and requires those accounts to be audited by auditors licensed to carry out accounting and audit work in Oman — the licence is part of the requirement, so an audit performed abroad by a firm without that licence does not discharge it. The audit itself is bought from the auditor; what reaches the Authority is the audited accounts and the auditor's report.
Who it applies to
Every entity in the jurisdiction
The duty is stated without a size qualification in the Law and relieved by a three-part test in the Regulation, which is why it is recorded here as applying generally rather than above a figure. Article 64 of the Law speaks of the taxpayer's accounts without reference to turnover. Article 139 of the Executive Regulation then exempts a taxpayer from submitting accounts with the final return where capital «shall not exceed RO 50,000», gross income «shall not exceed RO 300,000» and employees «shall not be more than (10) persons». All three limbs must be satisfied together: a company under the income figure but over the capital figure, or over ten employees, is not relieved, and stating the three hundred thousand Rial figure on its own would invite exactly that mistake. Two further points are left open because the texts read do not settle them. The first is whether article 139 relieves the taxpayer of having the accounts audited at all or only of submitting them with the return — it is worded as an exemption from submission. The second is how article 139 interacts with the separate small-enterprise regime of article 159bis, which uses different figures for capital, income and headcount.
Deadline
Within 4 months after the end of the financial year.
If missed
No separate monetary penalty for an unaudited or missing set of accounts was found in the texts read, and none is asserted here. What the sources do establish is the practical consequence: article 64 makes the accounts part of what the final return must carry, so a return sent without them is incomplete, and the penalty for failing to submit the return — the discretionary range of one hundred to two thousand Omani Rials stated in the Tax Authority's published questions and answers — is the figure that stands in the published material. The administrative penalty provisions of the Income Tax Law were not legible in the English text published by the Authority, so the question of a distinct fine for the accounts is left open rather than answered.
Proof of filing
The signed audit report of the auditor licensed in Oman, together with the set of financial statements it reports on, and the Authority's portal record showing those documents attached to the submitted final return. The licence of the auditing firm is worth keeping alongside them, because article 64 makes the licence, and not merely the audit, part of what is required.
Primary source: Executive Regulation of the Income Tax Law, article 139, exempting a taxpayer from submitting accounts with the final return where capital «shall not exceed RO 50,000», gross income «shall not exceed RO 300,000» and employees «shall not be more than (10) persons»; article 71(1) on «A copy of the annual accounts and financial statements along with the auditor's report». English version published by the Tax Authority (Jahaz Al-Dharaib) of the Sultanate of Oman. The audit requirement itself and the obligation to attach the accounts to the final return are in the Income Tax Law (Royal Decree 28/2009), article 64, which requires the accounts to be audited by auditors licensed to carry out accounting and audit work in Oman, at https://tms.taxoman.gov.om/portal/documents/20126/1455217/Income+Tax+Law+(English+Version).pdf
checked 2026-10-15 · Rechecked every 12 months

Mandatory value added tax registration on crossing the threshold

Formula, not a date
Filed to
The Tax Authority of the Sultanate of Oman, through the registration service of its taxpayer portal. The duty is a recurring test rather than a single act: article 55 of the Value Added Tax Law is written so that the threshold is measured at the end of every month, in two directions at once, which means the company has to look at the figure each month even in the years when nothing changes.
Who it applies to
Only above a threshold — taxable supplies > 38,500 OMR
Three things about this threshold matter more than the figure. First, what is counted. Article 56 of the Law states that the value of supplies includes the value of taxable supplies «except supplies of capital assets», the value of goods and services received by the taxable person under the reverse charge mechanism, and the value of intra-GCC supplies of goods and services. Imports are not in that list, so a company whose turnover is small but whose imports are large is not brought in by this article on that account; nor are exempt supplies counted. The one-off sale of a capital asset is expressly left out, which matters for a company that sells a building or a vehicle in an otherwise quiet year. Second, the period. Article 55 applies the test twice: to the total at the end of any month together with the eleven months immediately preceding it, and to the total expected at the end of any month together with the eleven months immediately following it. Either direction triggers the duty, so a company that expects a large contract can cross the threshold before it has earned anything. Third, the comparison itself. Article 55 says the total «exceeds the Mandatory Registration Threshold», which is recorded here as strictly greater than; the Tax Authority's registration page instead describes the duty as arising when taxable supplies «reach or are expected to reach 38,500 OMR», which would include the figure itself. The two statements of the same authority differ on whether a company exactly at thirty-eight thousand five hundred Rials must register, and that difference is left unresolved here. Voluntary registration is available below the mandatory line: article 61 sets a separate voluntary threshold of 19,250 Omani Rials and, unlike article 55, lets expenses as well as supplies satisfy it.
Deadline
Counted from an event, not from the calendar.
No date can be derived here. This deadline runs from something this page does not know — the financial year the company itself elects, or an event only you can date. What is published is the rule, not the day.
If missed
Article 101 of the Value Added Tax Law treats a deliberate failure to register as a criminal matter rather than an administrative one. It applies to a person «Deliberately refraining from registering with the Authority» and carries imprisonment of one to three years together with a fine of «not less than (OR 5,000) five thousand Omani riyals» and «not more than (OR 20,000) twenty thousand Omani riyals». Deliberateness is part of the offence as the article is worded, and the texts read do not state what follows from an unintentional failure to notice the threshold; article 103 leaves the administrative penalties to the Regulations, and those amounts were not legible in the published material, so nothing is asserted about them. Article 102 adds that prosecution requires the Chairman's request and that the Chairman may conciliate on payment of a sum between double the minimum and double the maximum prescribed.
Proof of filing
The value added tax registration certificate issued by the Authority, carrying the tax identification number and the effective date of registration. Alongside it, the company's own monthly computation of the value of supplies is worth keeping, because article 55 tests the figure at each month end and the effective date depends on which month the threshold was crossed in.
Primary source: Chairman's Decision of the Tax Authority of the Sultanate of Oman determining the registration thresholds: article One sets the Mandatory Registration Threshold under article (55) at «(38,500) thirty-eight thousand and five hundred Omani Rials» and article Two sets the Voluntary Registration Threshold under article (61) at «(19,250) nineteen thousand two hundred and fifty Omani Rials». The decision as published in English carries the year 2020 with the number left blank, and states that the Arabic text prevails. The test itself is in the Value Added Tax Law (Royal Decree 121/2020), article 55, «exceeds the Mandatory Registration Threshold», measured over the month «in addition to the eleven months immediately preceding it» or the eleven following, with article 56 listing taxable supplies «except supplies of capital assets», reverse charge receipts and intra-GCC supplies, at https://tms.taxoman.gov.om/portal/vat-law-regulations. The Authority's registration page states the duty as taxable supplies that «reach or are expected to reach 38,500 OMR», at https://tms.taxoman.gov.om/portal/web/taxportal/registration
checked 2026-10-15 · Rechecked every 12 months

Quarterly value added tax return and payment

Formula, not a date
Filed to
The Tax Authority of the Sultanate of Oman, through the taxpayer portal. The return and the money fall on the same day: article 72 of the Value Added Tax Law requires the return «within (30) thirty days following the end of the Tax Period», and article 82 makes the tax shown on it payable «on the date prescribed for filing the return». The Authority's own guide to return filing states that the tax owed «must be paid to the TA by the same date the tax return is due», so a return filed on time with the payment left for later is not a duty half done but a duty breached on its payment side.
Who it applies to
Only registered foreign entities
The duty follows registration and not turnover: once a person is registered, the return is due for every tax period, including a period in which nothing was sold. The period is quarterly. The Authority's guide to return filing states that «The Tax Period for VAT is 3 months i.e., a quarter of a year» and sets out the four period ends as 31 March, 30 June, 30 September and 31 December, so the four deadlines in an ordinary year fall thirty days after each of those dates. Article 71 of the Law leaves the length of the period to the Regulations and fixes only a floor, «provided that it's not less than one month», which means a shorter monthly period is possible within the Law; the texts read do not state the circumstances in which a taxpayer would be put on a monthly period instead of the quarterly one, and that question is left open here rather than answered by analogy with neighbouring jurisdictions that do operate such a split. A taxpayer registered voluntarily under article 61 files on the same footing as one registered compulsorily — nothing in the articles read makes the return lighter for having been chosen.
Deadline
Counted from an event, not from the calendar.
No date can be derived here. This deadline runs from something this page does not know — the financial year the company itself elects, or an event only you can date. What is published is the rule, not the day.
If missed
Two tracks, and the published amounts belong to the criminal one. Article 100, item 5 of the Value Added Tax Law covers the case where the Responsible Person «deliberately fails to submit a Tax Return for any Tax Period» and carries imprisonment of two months to one year together with a fine of «not less than (OR 1000) one thousand Omani riyals» and «not more than (OR 10,000) ten thousand Omani riyals». Deliberateness is part of that offence. For the ordinary late return, article 103 provides that «The Regulations shall specify the administrative penalties that may be imposed on the violator» and sets no figure itself; the administrative fine amounts were not legible in the published Regulations, so none is stated here. Separately from any fine, unpaid tax carries Additional Tax at one percent of the unpaid amount for each month or part of a month, which the Chairman may waive in whole or in part.
Proof of filing
The filed return for each tax period as the portal records it, with its reference and filing date, and the payment confirmation bearing the same date. Because the period is quarterly, the record that matters at the end of a year is the set of four, not the latest one: a single missing quarter is the gap an inspection finds.
Primary source: Value Added Tax Law (Royal Decree 121/2020), article 72 requiring the return «within (30) thirty days following the end of the Tax Period», article 82 making the tax payable «on the date prescribed for filing the return», article 71 leaving the length of the Tax Period to the Regulations «provided that it's not less than one month», and article 100 item 5 and article 103 on penalties. Published with the Executive Regulations (Decision 53/2021 and its amendments by Decisions 456/2022, 521/2023 and 81/2025) on the Laws and Regulations page of the Tax Authority (Jahaz Al-Dharaib) of the Sultanate of Oman; the Law states that the Arabic text prevails. The quarterly period and its four period ends of 31 March, 30 June, 30 September and 31 December are stated in the Authority's VAT Taxpayer Guide on VAT Return Filing, «The Tax Period for VAT is 3 months i.e., a quarter of a year», at https://tms.taxoman.gov.om/portal/documents/20126/1414820/VAT+Taxpayer+Guide+-+VAT+Return+Filing.pdf/fae31d0c-e7e7-0014-9f28-a4c506b36614?t=1733169613409
checked 2026-10-15 · Rechecked every 24 months

Monthly remittance and statement of tax withheld on payments to non-residents

Formula, not a date
Filed to
The Tax Authority of the Sultanate of Oman. The remittance and the paperwork travel together rather than separately: article 133 of the Executive Regulation provides that payment of withholding tax to the authority «shall be accompanied with the statement», and names the form as Income Tax Form No. 18. The duty falls on the Omani payer, not on the non-resident recipient, which is what makes it a recurring duty of the company itself rather than a matter for its counterparty.
Who it applies to
Every entity in the jurisdiction
There is no threshold and no registration gate: the duty attaches to any taxpayer in a month in which a covered payment was made or credited to a non-resident, and stays silent in every other month. So a company may carry this obligation for years without it ever biting, and then owe a filing fourteen days after the end of the single month in which it paid a foreign supplier. The categories matter, and only four of them are recorded here. Article 52 of the Income Tax Law lists five categories of income paid or credited to a non-resident person: royalties, consideration for research and development, consideration for the use of or right to use computer software, fees for management or for the performance of services, and dividends on shares or interests. Article 113 sets the rate at ten percent of the gross amount, so the tax is computed on the payment and not on a margin. The first four categories are recorded as live. For dividends and interest, a suspension has been reported but no primary source for it was found, and this record therefore does not assert their current status either way: a company about to pay a dividend or interest abroad should take that point separately rather than read it off this page. A double tax treaty may reduce the rate, and the texts read here do not set out how relief is claimed.
Deadline
Counted from an event, not from the calendar.
No date can be derived here. This deadline runs from something this page does not know — the financial year the company itself elects, or an event only you can date. What is published is the rule, not the day.
If missed
No fine specific to a late withholding statement was legible in the texts read, and none is invented here. What is established is the charge on the money: tax due and unpaid by its due date carries an additional tax at one percent per month of the outstanding amount, which the Tax Authority's published questions and answers attribute to article 156 of the Income Tax Law. Because article 53 fixes the due date at fourteen days from the end of the month of payment, that monthly charge begins to run from a date the company sets itself by paying its foreign supplier, which is what makes a forgotten month expensive rather than merely untidy. The administrative penalty provisions of the Law were not legible in the published English text, so no amount is stated for the statement itself.
Proof of filing
The statement on Income Tax Form No. 18 as filed, with the proof of the remittance it accompanied, and underneath them the invoice or contract showing the date on which the amount was paid or credited to the non-resident — that date, and not the invoice date, is what starts the fourteen days under article 53.
Primary source: Income Tax Law (Royal Decree 28/2009), article 52 listing the categories paid or credited to a non-resident person — royalties, consideration for research and development, consideration for the use of or right to use computer software, fees for management or performance of services, and dividends on shares or interests; article 53 requiring the withheld tax to be remitted «not later than fourteen days from the end of the month in which that amount has been paid or credited»; article 113 setting the rate at ten percent of the gross amount. English version published by the Tax Authority (Jahaz Al-Dharaib) of the Sultanate of Oman. The statement accompanying the payment and its form number are in the Executive Regulation of the Income Tax Law, article 133, «Payment of withholding tax to the Secretariat General shall be accompanied with the statement», Income Tax Form No. 18, at https://tms.taxoman.gov.om/portal/documents/20126/1451171/Executive+Regulation+of+Income+Tax+Law+in+English.pdf. The one percent monthly additional tax on unpaid tax is attributed to article 156 by the Authority's Income Tax FAQs, at https://tms.taxoman.gov.om/portal/income-tax-faqs
checked 2026-10-15 · Rechecked every 24 months
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