Not abstract numbers — the plan that shapes taxes, benefits, defense, courts, and every federal service.

A federal budget is a plan for collecting and spending public money: revenue, mandatory spending, discretionary spending, interest on debt, and the borrowing that fills any gap between them. These terms sound technical, but they directly shape roads, research, agencies, and services people actually use.

Government works best when people can see how power is used and where decisions are made.

Guide to Government

Main revenue sourceIndividual income taxes
Spending typesMandatory & discretionary
Gap covered byBorrowing
Key terms6

Six Terms Worth Keeping Straight

Revenue

Money the federal government collects, mostly through taxes.

Appropriation

Legal authority to actually spend federal money for a specific purpose.

Deficit

The yearly gap when spending exceeds revenue.

Debt

Accumulated federal borrowing over time, built up year after year.

Debt ceiling

A statutory limit on federal borrowing authority.

Government shutdown

What can happen when appropriations lapse without renewal.

The Budget Fights That Make the News





What happens when appropriations lapse

Without renewed spending authority, agencies generally can’t legally continue normal operations — a shutdown is a funding-authority problem, not a debt problem.

A separate fight over borrowing authority

Debt-limit fights happen when the statutory borrowing ceiling becomes a real deadline — a distinct issue from an annual budget deficit, even though the two are often discussed together.

Whether yearly borrowing is too high

Deficit debates ask whether annual borrowing levels are sustainable; tradeoff debates ask what government should prioritize given limited revenue — two related but genuinely separate arguments.

Worth knowing

Not all federal spending is decided the same way each year

A common misconception is that Congress decides all federal spending fresh every year. Some spending is controlled annually through the appropriations process, but other spending follows formulas set in permanent law — continuing automatically without a new vote each year unless Congress specifically changes the underlying statute. Understanding which category a given program falls into explains a lot about why some spending fights happen annually and others almost never do.