Oman's personal income tax from January 2028 — what it actually means for you

Most of what has been written about this tax online is either vague or subtly wrong. The two errors that matter: people assume that crossing OMR 42,000 makes your whole income taxable, and they assume the detailed rules are already final. Neither is true.

The law itself

The Personal Income Tax Law was issued by Royal Decree 56/2025, signed on 22 June 2025 and published in Official Gazette No. 1602 on 30 June 2025. It runs to 76 articles across 16 chapters, and it comes into force on 1 January 2028.

That two-and-a-half year gap between publication and effect is deliberate. It gives the Tax Authority time to build collection systems, and it gives individuals and employers time to prepare. It also means the tax year 2028 is the first one that counts — income you earn in 2026 and 2027 is not affected.

How the 5% is actually calculated

This is the single most misunderstood point, so it is worth being precise. The OMR 42,000 is not a cliff edge. It works as a fixed annual deduction: the first OMR 42,000 of your income is always free of tax, and the 5% applies only to what is left above it.

The Tax Authority's own guidance defines net income as the amount exceeding OMR 42,000 of total income. So an income of OMR 42,001 does not produce a tax bill of OMR 2,100 — it produces a tax bill of five baisa.

Note the last column. Because the first OMR 42,000 is always exempt, the effective rate climbs slowly and never reaches 5%. Even someone earning a quarter of a million rials a year pays just over 4% of their total income.

Who has to pay

The law applies to natural persons, not companies — companies continue under the existing corporate tax regime. Nationality is not the test; residence is.

You are a tax resident of Oman if you are present in the country for more than 183 days in the tax year, whether continuously or in separate visits. Tax residents are taxed on their worldwide income. Non-residents are taxed only on income sourced in Oman.

For most people living and working in Oman this is straightforward. It gets more interesting for people who split their time across the Gulf, or who run a business in Oman while living elsewhere. If that describes you, start keeping a defensible record of your days now — the 183-day count is the whole ballgame, and reconstructing it years later from old boarding passes is miserable.

What counts as income

The scope is broad. Based on the law and the Tax Authority's published guidance, taxable income includes:

• Salaries, wages, bonuses and benefits in kind
• Pensions and end-of-service gratuities
• Board and directors' remuneration, and Shura and State Council rewards
• Self-employment and independent professional income
• Rental income from property and equipment leasing
• Royalties from intellectual and industrial property
• Interest and returns on shares, sukuk and bonds
• Gains on the disposal of real estate
• Prizes, grants and gifts that are not specifically exempt

What is exempt

The Tax Authority has described 16 categories of exempt income. The ones most likely to matter to you:

• Your primary residence — gains on sale are exempt, provided the property has been declared to the Tax Authority for at least two years
• A secondary residence — one exemption, once in your lifetime
• Inheritance and gifts — from wills, or between spouses and first-degree relatives
• Government bonds and investment certificates — interest and returns
• Registered pension schemes — contributions and distributions, for up to two schemes
• Intellectual and industrial property rights — exempt for five years from registration
• Diplomatic salaries — subject to reciprocity
• Income earned abroad after a change in residency status — see the caution below

What you can deduct

The deductions are unusually generous for a tax at this rate, and they are clearly designed to soften the impact on families:

• Education expenses — for yourself, your spouse, first-degree relatives and dependants
• Healthcare expenses — for yourself, your spouse, first-degree relatives and siblings in your care
• Zakat, donations and endowments — to Tax Authority approved bodies, capped at 5% of gross income
• Interest or profit on financing for your primary residence — once in a lifetime
• Self-employment expenses — you may deduct either a flat 15% of gross self-employment income or your actual documented expenses, but not both
• Foreign tax paid on income that is also taxable in Oman, as a credit

Losses can be carried forward for five years and set against income from the same source. Records must be kept for five years.

How you will actually pay it

For employees, most of this should be invisible. Employers are required to withhold tax at source on salaries, pensions, end-of-service payments and board fees, and remit it. If you have a single source of income, your employer may file on your behalf if you ask.

Everyone else self-assesses. Returns are filed electronically, and the deadline is within six months of the end of the tax year — so the first returns, for the 2028 tax year, are due by 30 June 2029.

Penalties follow a familiar pattern: 1% per month on late payment, administrative fines up to OMR 5,000, and for deliberate evasion — false documents, backdated contracts, concealing foreign income — imprisonment of one to three years plus fines of OMR 10,000 to 20,000.

What has not changed

This is a new tax layered on top of the existing system, not a replacement for any of it:

The honest caveat: the detailed rules

Royal Decree 56/2025 required the Chairman of the Tax Authority to issue Executive Regulations within one year of publication — a deadline of 30 June 2026, which has now passed.

We could not confirm from published sources that the Executive Regulations specific to the personal income tax have been issued. A Tax Authority decision (180/2026, gazetted 20 July 2026) amended executive regulations concerning business expense deductions, but on the evidence available it appears to relate to the existing corporate income tax law rather than the new personal one.

This matters because the regulations are where the practical detail lives: caps on the education and healthcare deductions, the precise withholding mechanics for non-employment income, and documentation standards. Until they are published and read, any guide — this one included — is describing the framework rather than the final rulebook.

What to do in 2026

There is no action to take with the Tax Authority yet. But there are things that are much easier to start now than to reconstruct in 2028:

1. Keep a day count. If you travel frequently, start a simple record of entry and exit dates. The 183-day test decides whether Oman taxes your worldwide income or only your Omani income.
2. Separate your income streams in your bookkeeping — employment, self-employment, rent, investments. They are treated differently, and untangling a single mixed account later is painful.
3. Start keeping receipts for education, healthcare and charitable giving. These are deductible, and deductions you cannot document are deductions you do not get.
4. Note the dates on your property. The primary-residence exemption requires the property to have been declared for at least two years, and the mortgage relief is once in a lifetime — so the timing of a purchase or sale around 2028 is worth thinking about deliberately.
5. If you are an employer, start scoping payroll changes now. Withholding obligations fall on you, not your staff, and payroll systems are not usually quick to change.

For context, a flat 5% with a OMR 42,000 allowance remains low by any international comparison. This is a meaningful policy shift for the region, but for the large majority of people in Oman the practical answer on 1 January 2028 will be: nothing changes.