How the Oman split calculation works
Royal Decree 53 of 2023, the new Oman Labour Law, came into force on 31 July 2023. The new law replaces Royal Decree 35 of 2003 and changes the end-of-service gratuity formula. To avoid stripping accrued benefits from existing workers, the Ministry of Labour clarified through Oman Observer that any tenure crossing the 31 July 2023 cutoff is split into two portions. The pre-cutoff portion continues to be calculated under the old tiered formula. The post-cutoff portion uses the new flat formula. The two figures are summed for the final payout.
The wage base under both laws is the last drawn basic salary only. Housing, transport and other allowances are excluded. The minimum eligibility threshold is one full year of continuous service. Tenures below twelve months pay no statutory gratuity. Once the one-year threshold is crossed every additional month adds one-twelfth of a year's accrual on a pro-rata basis. Unpaid leave does not count as service.
Royal Decree 35 of 2003 (old law)
The old law applies to any tenure earned before 31 July 2023. The formula is tiered: for each of the first three years of service the worker accrues half a month of basic salary, then one full month of basic per year from year four onwards. The accrual cursor runs from the joining date with the employer, not from the start of the calculation window. So a worker who joined in January 2020 and whose pre-cutoff window runs from January 2020 to 31 July 2023 accrues three years of half-month and roughly 0.58 years of full-month, summing to roughly 1.58 months of basic.
The old law applies the same flat formula at all tenure levels for the year-four band, with no further escalation. There is no cap and no resignation reduction. The calculator above continues the tier cursor cleanly into the post-cutoff window: the new-law portion picks up at the worker's accrued tenure level, but the new-law formula itself is flat, so the cursor distinction matters only for the old-law portion.
Royal Decree 53 of 2023 (new law)
The new law applies to any tenure earned on or after 31 July 2023. The formula is a single flat rate: one full month of basic salary per completed year of service, no tiers, no escalation. The change makes the post-cutoff portion easier to verify and brings Oman closer to the Bahrain and Qatar flat-rate structures. Workers who joined on or after 31 July 2023 fall entirely under the new flat formula and do not have a split calculation.
Worked examples
Example 1: Joined 1 Jan 2020, leaving 1 Jan 2026, OMR 600 basic. Total tenure six years. Old-law portion: 1 Jan 2020 to 31 Jul 2023, that is 3.58 years. The first three years earn half a month each, summing to 1.5 months of basic, OMR 900. The remaining 0.58 years are in the full-month band, OMR 350. Old-law total OMR 1,250. New-law portion: 31 Jul 2023 to 1 Jan 2026, that is 2.42 years at one month per year, OMR 1,450. Grand total OMR 2,700.
Example 2: Joined 1 Aug 2023, leaving 1 Aug 2025, OMR 500 basic. All tenure is post-cutoff so the new flat formula applies. Two years at one month per year is OMR 1,000. No old-law portion.
| Service window | Formula | Rate |
|---|---|---|
| Before 31 Jul 2023, yr 1 to 3 | Old (RD 35/2003) | 0.5 month / yr |
| Before 31 Jul 2023, yr 4+ | Old (RD 35/2003) | 1 month / yr |
| From 31 Jul 2023 | New (RD 53/2023) | 1 month / yr |
Example 3: Joined 1 Jan 2015, leaving 1 Jan 2026, OMR 800 basic. Total eleven years. Old-law portion: 1 Jan 2015 to 31 Jul 2023, that is 8.58 years. The first three years earn 1.5 months total (OMR 1,200). The remaining 5.58 years earn one month each, OMR 4,467. Old-law total OMR 5,667. New-law portion: 2.42 years at one month per year, OMR 1,933. Grand total OMR 7,600.
The future savings system
Article 136 of the Oman Social Protection Law mandates a regulated savings system for expatriate workers, replacing the lump-sum gratuity for new accruals. The implementation date has been pushed back to 19 July 2027. Until that date, Royal Decree 53/2023 continues to govern. From 19 July 2027 onwards, employers will contribute monthly to a savings vehicle on behalf of expat workers in line with the Bahrain SIO model. Existing accrued lump-sum entitlements are expected to be honoured at the transition, but the implementing regulations have not yet been published in full as of June 2026. Read the Oman resident card renewal guide for the wider residence and exit framework.
What to do next
For the broader Oman work and residence framework, see the Oman work permit service and the resident card renewal guide. Comparing across the Gulf? Run the same scenario through the Qatar end-of-service calculator and the Bahrain end-of-service calculator. For exit and overstay timing, the GCC overstay fines compared guide covers Oman alongside the other five states.