Oman Corporate Tax 2026: Rates, Exemptions & Filing Guide
Oman has had corporate tax since 2009 — long before the UAE introduced it — but the regime is being reshaped through 2026 to align with the OECD Pillar Two minimum tax and to introduce a personal income tax (PIT) in 2028. This guide is the practical version for SMBs: what rate applies to you, what the OTA expects in your filing, and how to set up your books so the audit doesn't ruin your December.
The headline rates
| Entity | Rate | Threshold |
|---|---|---|
| Most companies (LLC, JSC, branches) | 15% | No threshold — applies on first OMR of taxable profit |
| Small businesses meeting criteria | 3% | Annual gross income ≤ OMR 100,000, registered capital ≤ OMR 50,000, ≤ 15 employees, in specific eligible sectors |
| Petroleum companies | 55% | Special regime |
| Large multinationals (Pillar Two) | Top-up to 15% | Consolidated global revenue ≥ EUR 750M |
The OMR 30,000 minimum-profit exemption that existed previously was removed in earlier reforms. Today, every company files — even if profit is small or the rate is 3%. There is no zero-rate band.
Small business 3% tier — who qualifies
Most Omani SMBs do not qualify for the 3% rate. The eligibility conditions are narrow:
- Annual gross income (not profit) below OMR 100,000.
- Paid-up capital below OMR 50,000.
- Maximum 15 employees.
- Activity is on the OTA's eligible list (industrial, manufacturing, certain services — not financial services or holding companies).
- The company is owned by Omani nationals (or specific GCC structures).
If you're close to the OMR 100,000 threshold, careful timing of revenue recognition near year-end matters. The OTA can challenge artificial deferral.
Free zones (Sohar, Salalah, Duqm, Al Mazyounah)
Oman's free zones offer corporate tax holidays of varying length (typically 25–30 years) for qualifying activities. Each zone has slightly different terms:
- Sohar Free Zone — 25-year tax holiday, extendable.
- Salalah Free Zone — 30-year holiday for manufacturing.
- Duqm SEZ — 30 years for tourism, manufacturing, logistics.
- Al Mazyounah — focused on cross-border trade with Yemen.
The free zone holiday applies only to qualifying activities. Any income from outside the zone (services to mainland Oman customers, dividends from non-zone subsidiaries) is still taxable at 15%.
Filing deadlines and process
- Provisional return. Due within 3 months of fiscal year end. Estimates current year tax liability and triggers the first instalment payment.
- Final return. Due within 6 months of fiscal year end. Filed via the OTA's online portal with audited financial statements.
- Audit. Companies with annual revenue above OMR 30,000 must file audited financial statements.
Late filing penalty is 1% per month of the unpaid tax, plus OMR 100 fixed per delay. Late filing also delays your tax residency certificate, which can block contracts with government entities.
VAT and corporate tax — keep them separate
Oman's 5% VAT (in force since 2021) and the corporate tax are administered by the same OTA but report on different cycles. Don't expect your VAT return to flow into your corporate tax calculation automatically — the two use different timing rules (cash vs accrual, related-party adjustments, etc.). Your accounting system should produce both clean monthly VAT returns and accrual-basis books for year-end CT.
What changes when Oman PIT lands in 2028
Oman's personal income tax — the first in the GCC — was originally scheduled for 1 January 2028 at a 5% rate on individuals earning above approximately OMR 42,000 per year. Confirm the final timeline on the OTA portal before planning your compensation structure.
This is a planning item, not a filing item, but it affects how SMB owners take cash from their companies. Salary vs dividend optimisation becomes relevant once PIT exists.
Books and records — what your ERP must produce
- Trial balance and general ledger in OMR (with multi-currency support if you transact in USD/AED).
- Audited-quality P&L and balance sheet by year-end.
- Related-party transaction schedule — the OTA scrutinises transfer pricing, especially for KSA / UAE-related subsidiaries.
- Depreciation schedule using Oman's prescribed rates (different from accounting depreciation in some cases).
- Donations and entertainment expense ledger (these have specific deductibility limits).
Common compliance mistakes
- Claiming the 3% rate without meeting the employee or capital cap. The OTA cross-checks with social-insurance filings and commercial registers.
- Mixing free zone and non-free zone income on one P&L line. Separate accounts make the audit clean.
- Skipping the provisional return. The OTA will issue an estimated assessment that's almost always higher than reality, and getting it amended is painful.
- Late audited statements. Many SMBs file CT on time but submit audits two months later, paying the daily penalty.
- Treating director loans as dividends. Specific rules around shareholder advances; document the loan agreement properly.
Oman accounting, VAT and corporate tax — one system
Naqix supports Oman's 5% VAT with OTA-format returns, corporate tax provisioning in OMR, multi-branch operations, and Arabic + English invoicing — flat OMR pricing.
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