The Treasury Department says the surplus in June totaled USD 51.8 billion, compared to a surplus of USD 70.5 billion a year ago. However, the larger 2014 monthly surplus was heavily influenced by a timing quirk that had moved June benefit payments into May last year because June 1 fell on a Saturday.
For the current budget year, the government is running a deficit of USD 313.4 billion, a 14.3 per cent reduction from the imbalance over the first nine months of the previous budget year.
So far this year, government receipts total USD 2.45 trillion, 8.3 per cent higher than the first nine months of the 2014 budget year. Government outlays total USD 2.76 trillion through June, 5.1 per cent higher than the previous year.
The federal government's budget year begins on Oct 1 and ends on Sept 31.
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The 2014 deficit was down from USD 680.2 billion in 2013. Before then, the US had recorded four straight years of annual deficits topping USD 1 trillion. That reflected the impact of a severe financial crisis and the worst recession since the Great Depression of the 1930s.
Private economists have estimated that Lew can continue operating this way until October or November when the government faces the prospect of an unprecedented default on the national debt if the debt limit is not raised.
Republicans control both the House and Senate, and more conservative GOP lawmakers would like to use the need to raise the borrowing limit as leverage to force President Barack Obama to shift his policies in such areas as health insurance and immigration.
It was a standoff over raising the debt limit in August 2011 that prompted the first-ever downgrade of the nation's credit rating by Standard & Poor's. And in October 2013, a dispute over the budget prompted a 16-day partial government shutdown.