What it actually is

A government shutdown is a lapse in appropriations: Congress has not provided funding through appropriations laws or a continuing resolution, and no other law supplies the money. Without appropriations, many activities paid for by annual or discretionary funding must stop.

Not every part of government shuts down. Programs funded by permanent or mandatory appropriations (for example many benefit payments) generally continue. The shutdown mainly affects discretionary programs that rely on annual funding laws.

How it works

Congress normally provides agency funding through regular appropriations bills (often grouped as 12 regular bills) or a continuing resolution. If those laws are not in effect, a lapse in appropriations occurs and agencies follow guidance from the Office of Management and Budget (see A-11, Section 124) and agency legal offices.

When funding lapses, agencies identify "excepted" employees who must keep working to perform activities necessary for public safety or the protection of property, and "non-excepted" employees who are furloughed (placed on leave without work). Some employees who work during a lapse may do so without immediate pay; Congress may later vote to authorize back pay, but that is a separate action and not automatic.

A real example

There have been multiple shutdowns in recent decades. Some lasted only a few days; others stretched for weeks. These episodes typically show the same pattern: lapses in funding, designated excepted work continuing, and many non-excepted activities pausing, which leads to furloughs and service interruptions in affected programs.

Why it matters to you

A shutdown can delay routine services you might notice: national parks or museums may close, and administrative processing like some visa and passport services can slow. If you are a federal employee, you could be furloughed or required to work without immediate pay.

Many major benefit programs and core public-safety functions continue during a lapse, but paperwork and other time-sensitive services can be disrupted and create real inconvenience and cost for ordinary people.

Common misunderstandings

A shutdown is not the entire government turning off. Military personnel generally remain on duty, and air traffic control, law enforcement, prisons, and other public-safety functions generally continue. Whether someone works or is furloughed depends on law and agency decisions about what is "excepted."

Also, a shutdown is a funding lapse, not a policy order issued by the President alone. It results from Congress and the President not completing the appropriations process or passing a continuing resolution that provides funding.