The national debt jumped more than $100 billion on the first business day of fiscal year 2018.

The debt was $20.245 trillion on Friday, the last business day of fiscal year 2017. The government's fiscal year ended on Sept. 30, a Saturday.

On Monday, the national debt clocked in at $20.348 trillion, $103 billion higher than Friday's number.

The sudden spike is a rocky start for the new fiscal year, especially in light of the government's success in keeping growth in the debt low in FY 2017.

The debt grew $671 billion in the just-closed fiscal year, much lower than the more than $1 trillion annual growth in the debt under President Obama.