Absolutely everything you need to know about how the government shutdown will work - The Washington Post http://www.washingtonpost.com/blogs/wonkblog/wp/2013/09/30/absolutely-everything-you-need-to-know-about-how-the-government-shutdown-will-work ᆞ hort answer: There are wide swaths of the federal government that need to be funded each year in order to operate. If Congress can't agree on how to fund them, they have to close down. And, right now, Congress can't agree on how to fund them. To get a bit more specific: Each year, the House and Senate are supposed to agree on 12 appropriations bills to fund the federal agencies and set spending priorities. Congress has become really bad at passing these bills, so in recent years they've resorted to stopgap budgets to keep the government funded (known as "continuing resolutions"). The last stopgap passed on March 28, 2013, and ends on Sept. 30.

http://www.washingtonpost.com/blogs/wonkblog/wp/2013/09/30/absolutely-everything-you-need-to-know-about-how-the-government-shutdown-will-work