“What does shutdown theater actually cost taxpayers? Lost Productivity, for starters. The 2013 shutdown cost $2.5 billion in back pay to 850,000 furloughed employees who missed a combined 6.6 million work days. All that productivity was permanently lost, since they were paid for work not performed.
Shutdowns also result in special expenses specifically related to preparing for shutdowns. Before each shutdown, agencies must develop detailed contingency plans outlining which functions will continue and which will stop. This pulls hundreds of thousands of employees from their regular duties to document procedures that everyone hopes will never be used.
Shutdowns cause economic disruption. The Congressional Budget Office estimated that the 2018-2019 shutdown reduced GDP by $11 billion in all, including $3 billion that will never be recovered. The 2013 shutdown cost the economy $24 billion and 120,000 private sector jobs.
Finally, shutdowns cause a great deal of administrative drama. Beyond direct costs, shutdowns can delay tax refunds (almost $4 billion in 2013), halt fee collections, and force the government to pay penalty interest on late payments. These indirect costs often exceed the supposed savings from furloughing workers. (White House Office of Management and Budget, November 2013)”