The Treasury Department predicted the U.S. government’s borrowing needs in the second half of this year will jump to the most since the financial crisis a decade ago as the nation’s fiscal health deteriorates despite a strong economy.

The department expects to issue $329 billion in net marketable debt from July through September, the fourth-largest total for that quarter on record and higher than the $273 billion estimated in April, Treasury said in a report Monday. The department’s forecast for the October-December quarter is $440 billion, bringing the second-half borrowing estimate to $769 billion, the highest since $1.1 trillion in July-December 2008.