Oman's state budget for 2018, approved by ruler Sultan Qaboos on Monday will boost spending while keeping the same deficit as the 2017 budget.

The budget projects spending of 12.5 billion rials ($32.5 billion) this year, up from 11.7 billion in the original budget for 2017, local media quoted a Finance Ministry statement as saying.

Revenue are projected at 9.5 billion rials, up from 8.7 billion in the 2017 budget. That leaves a planned deficit of 3 billion rials this year, the same as last year's projected deficit.

The 2018 budget assumes an average oil price of $50 per barrel, up from an assumption of $45 for 2017. The Brent oil price is now above $65, so Oman's revenue is likely to be significantly higher than expected if oil prices stay flat.

Nevertheless, the budget projects a deficit of 10 percent of gross domestic product in 2018, well above levels which economists consider sustainable in the long run and higher than 12 percent planned for 2017.

The finance ministry said on Monday that it needed to continue raising expenditure to boost economic growth and living standards, while building social housing and providing other assistance to lower-income citizens.

Oman has been spending heavily on industrial and infrastructure projects in an attempt to diversify its economy beyond oil exports.

Finance ministry sources told local media last week that Oman would delay the introduction of a 5 percent value-added tax until 2019, instead of imposing it in 2018 as originally planned, to give tax administrators and companies more time to prepare. However, Oman will impose a new tax on sugary drinks and tobacco products by mid-2018.

The ministry said on Monday that it would proceed with a privatization program and was working to sell some state companies in 2018.