The national debt exceeded $21 trillion for the first time on Thursday, a little more than six months after it hit first $20 trillion on Sept. 8.
The national debt was $21.031 trillion on Thursday. The government releases total debt figures each business day, but it lags by one day.
Federal borrowing has been on the rise again since February, when Congress passed legislation to suspend the debt ceiling. That move allowed the government to borrow as much as it needs to fund the activities approved by Congress.
Under the law passed in February, the government will not face any borrowing limit until March 1, 2019. At its current pace, the government is on track to add at least $1 trillion to the national debt by then.