The partial federal government shutdown could reach a cost of more than $100 million daily for the U.S. economy just through the impact on travel, according to a preliminary calculation by the U.S. Travel Association's economic research department.

This includes a daily cost of nearly $50 million in direct domestic travel spending, plus more than $50 million in indirect and induced travel-related output, caused by suspended national parks visitor services as well as the standstill of travel related to government business. 

The figure assumes that the shutdown has not affected Customs and Border Protection operations, visa processing or air transportation, though there were news reports Monday that those systems are beginning to feel fallout from the shutdown. As information on the effects of the shutdown becomes available, our team will update our projection of the travel-related economic impact.