The deficit is projected to be USD 21.6 billion (19.3 billion euros), with revenues estimated at USD 43.6 billion and expenditure at USD 65.2 billion.
Oil income, calculated at USD 45 a barrel, is projected at USD 38.4 billion, up 36 percent from the estimated last year's budget.
Finance Minister Anas al-Saleh told parliament that provisional figures showed an actual shortfall of USD 21.3 billion in the 2016/17 fiscal year, which runs from April 1 to March 31 in Kuwait.
Saleh said Kuwait had faced "extremely difficult challenges" in the past three years in particular, as crude prices plummeted due to a production glut.
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Kuwait's government had financed the shortfall through state reserves, which are estimated at about USD 600 billion, and through bond issues, Saleh said.
The government has issued domestic bonds worth USD 7.2 billion and international bonds worth USD 8 billion, according to the minister.
Despite the sharp slide in oil prices since 2014, oil income is still projected to constitute 88 percent of Kuwait's total revenues.
As part of efforts to reduce the deficit, the emirate in September raised petrol prices and plans to increase electricity and water charges.
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