Budget authority is the foundational concept of United States federal appropriations law, defined under the Congressional Budget and Impoundment Control Act of 1974 (Public Law 93-344) and codified in Title 2 and Title 31 of the U.S. Code. It denotes the authority provided by federal law to enter into financial obligations that will result in outlays of government money. Critically, budget authority is distinct from outlays: budget authority is the permission to commit funds, while an outlay is the actual disbursement of cash from the Treasury. Because authority granted in one fiscal year may produce outlays over several subsequent years, the two figures rarely coincide in any given year, a distinction the Antideficiency Act (31 U.S.C. §§ 1341–1342) enforces by criminalizing obligations made in excess or in advance of available budget authority.
Budget authority takes four principal forms. Appropriations are the most common, provided through the twelve annual appropriations bills and permitting agencies to incur obligations and make payments from the Treasury. Borrowing authority permits an agency to obligate funds drawn from borrowed money. Contract authority allows obligations to be incurred in advance of appropriations, with appropriations later required to liquidate the obligation. Spending authority from offsetting collections (such as fees) lets agencies obligate receipts. Budget authority is further classified by its period of availability: one-year (annual), multi-year, and no-year (available until expended). It is also categorized as discretionary—controlled through the annual appropriations process—or mandatory (direct spending), which flows from authorizing statutes like the Social Security Act and bypasses annual appropriations. The Budget Enforcement Act of 1990 and later the Budget Control Act of 2011 imposed caps and sequestration mechanisms on discretionary budget authority.
In the federal budget cycle, budget authority originates with the President's budget request (submitted by the first Monday in February under 31 U.S.C. § 1105), is shaped by the congressional budget resolution setting Section 302(a) and 302(b) allocations, and is ultimately enacted through appropriations acts scored by the Congressional Budget Office and the Office of Management and Budget. When Congress fails to enact budget authority before the October 1 start of the fiscal year, agencies face a lapse in appropriations and a government shutdown, as occurred in 2013, 2018–2019 (the 35-day longest shutdown), and again amid continuing-resolution disputes through 2024–2025. The Impoundment Control Act constrains the President from withholding enacted budget authority without congressional approval through rescission or deferral.
For the FSOT (Foreign Service Officer Test) Job Knowledge component, budget authority is tested within U.S. government structure, the federal budget process, and the separation of powers between Congress's "power of the purse" (Article I, Section 9, Clause 7) and executive administration. Typical question angles ask candidates to distinguish budget authority from outlays, identify the four types of budget authority, or recognize the role of the appropriations process and the Antideficiency Act. Candidates should also master discretionary versus mandatory spending distinctions and the consequences of a lapse in appropriations, which recur in both job-knowledge and situational-judgment framings of fiscal stewardship.
Example
In the FY2019 lapse, Congress's failure to enact budget authority for nine departments triggered the 35-day government shutdown from December 2018 to January 2019, the longest in U.S. history.
Frequently asked questions
Budget authority is the legal permission to incur obligations, while outlays are the actual disbursements of cash from the Treasury. Authority granted in one year may produce outlays across several future years, so the figures seldom match annually.