The first-quarter figure is below a RON4.5 billion target agreed with the International Monetary Fund, the ministry said in a statement.
End-February, the budget ran a deficit of RON2.44 billion, or 0.39% of GDP.
Total revenue to the consolidated budget rose 3% on the year to RON47.04 billion in the first three months of 2013, while overall expenditure was up 4.4% in nominal terms to RON51.23 billion.
The country’s GDP is estimated at RON623.3 million in 2013, up from RON587.5 billion in the previous year.
Romania wants to reduce its budget gap to 2.1% of GDP in 2013, from 2.52% of GDP a year earlier. (EUR1=RON4.3366)