The U.S. Treasury Department released its federal budget data on Thursday. The budget deficit turned to a surplus of $91.0 billion in September, up from a deficit of $64.4 billion in August.
In the fiscal year 2015, which ends at September this year, the budget deficit totalled $439 billion, down $44 million from 2014. It was the lowest level since 2007.
The deficit totalled 2.5% of gross domestic product (GDP).
Spending rose 5% in the fiscal year 2015, while individual income-tax receipts jumped by 11%, and corporate tax revenues climbed by 7.2%.