Appropriated Funds: Rules, Limits, and Congressional Control

Appropriated funds are the money Congress has legally authorized a federal agency to spend. Under Article I, Section 9, Clause 7 of the Constitution, no money can be drawn from the Treasury except through appropriations made by law.¹ That single sentence puts the “power of the purse” with Congress and means every federal expenditure needs a statutory basis. An agency cannot sign a contract, hire a contractor, or buy equipment unless a specific appropriations act makes the money available, and the Supreme Court has treated the clause as a limitation on all branches of government, not just a grant of legislative power.²

Discretionary Spending Is Only Part of the Federal Budget

Not every federal dollar runs through the annual appropriations process. Mandatory spending covers programs like Social Security and Medicare, where the authorizing statute itself controls spending levels based on eligibility rules and benefit formulas. Congress doesn’t vote each year on how much to spend on these. Mandatory spending accounts for roughly two-thirds of all federal expenditures.³

Discretionary spending is what most people picture when they hear “appropriated funds.” It requires Congress to pass new appropriations bills each year and covers national defense, federal agency operations, education, transportation, and hundreds of other programs funded through 12 regular appropriations bills.⁴ When those bills don’t pass, the affected agencies lose their spending authority.

Authorization and Appropriation Are Two Different Steps

Congress uses a two-step process to fund most programs. An authorization bill creates or continues a program and may set a ceiling on how much can be spent. A separate appropriation bill then provides the actual money.⁵ An authorization alone doesn’t release funds, and an appropriation alone technically shouldn’t fund a program that lacks a current authorization.

In practice, Congress often bends this rule. When a program’s authorization expires but Congress keeps funding it through appropriations, the result is called an “unauthorized appropriation.” House rules allow members to raise a procedural objection against such spending, though waivers are routinely granted. Both chambers require their Appropriations Committees to flag any programs in a spending bill that lack current authorization.⁵ Some programs have been funded this way for decades.

How Long Appropriated Funds Stay Available

Every appropriation comes with a clock. The time window during which an agency can legally commit the money is tightly controlled.

Annual appropriations are available for obligation during a single fiscal year, which runs from October 1 through September 30.⁶ If an agency doesn’t commit those funds by the end of the 12-month window, they expire and can no longer support new contracts or obligations.⁷ The pressure of this use-it-or-lose-it deadline drives a significant amount of end-of-year spending activity across the government.

Multi-year appropriations extend availability beyond one fiscal year for a defined period. No-year appropriations remove the time limit entirely, remaining available until fully spent.⁸ Congress typically reserves no-year funding for major construction projects, disaster relief, and other efforts without predictable end dates.

Expiration doesn’t mean the money vanishes overnight. After an annual or multi-year appropriation expires, the account enters a five-year “expired” phase. During that window, the agency can’t take on new obligations but can still make payments against commitments already in place before expiration. At the end of five years, the account is formally closed and any remaining balance is canceled permanently.⁹ After cancellation, the funds cannot be spent for any purpose.

Purpose, Time, and Amount: The Three Rules That Govern Every Dollar

Federal financial managers live by three constraints. Break any one and you’ve committed a legal violation.

Purpose

Agencies can only spend appropriated money on the specific objectives Congress intended. The statute is blunt: appropriations shall be applied only to the objects for which they were made.¹⁰ Money earmarked for military housing can’t be redirected to unrelated technology projects. This rule also creates a prohibition against “augmenting” appropriations. Agencies can’t supplement their budget by collecting outside revenue and spending it unless Congress specifically authorizes the retention.

Time

The bona fide needs rule requires agencies to use current-year funds only for needs that genuinely arise during that fiscal year.¹¹ An agency can’t burn through this year’s budget buying supplies intended for use years down the road just to avoid returning unspent money. The rule gets more nuanced with service contracts. When a contract produces a single deliverable that can’t be meaningfully divided, the agency can fund the entire effort with the budget available at award, even if performance stretches into the next fiscal year. Ongoing services such as janitorial work or IT support are evaluated year by year.¹²

Amount

No agency can spend more than Congress gave it. Every purchase and contract must be backed by a verified balance in the correct account before the obligation is finalized. Financial managers track obligations against total appropriations continuously, and exceeding the authorized amount triggers the Antideficiency Act.

The Antideficiency Act Enforces the Rules

The Antideficiency Act is the enforcement mechanism behind purpose, time, and amount. It flatly prohibits federal employees from spending or obligating more than the amount available in their appropriation, or committing the government to pay before funds have been appropriated.¹³

The same law bars agencies from accepting voluntary services. Without that restriction, agencies could circumvent spending limits by taking unpaid labor and then arguing the work created an obligation Congress would have to fund retroactively. The only exception applies to genuine emergencies threatening human life or property, and the statute specifically excludes ordinary government functions whose suspension wouldn’t create an imminent threat.¹⁴

The consequences are personal. On the administrative side, employees who violate the Act face discipline up to and including suspension without pay or removal.¹⁵ A knowing and willful violation can result in a fine of up to $5,000, imprisonment for up to two years, or both.¹⁶ When a violation is discovered, the head of the agency must immediately report all relevant facts and a description of corrective actions to the President and Congress, with a copy to the Comptroller General.¹⁷

What Happens When Appropriations Lapse

Congress is supposed to pass all 12 regular appropriations bills before October 1. It rarely does. When the fiscal year starts without enacted appropriations, Congress can pass a continuing resolution to keep agencies funded temporarily, usually at the prior year’s spending levels.¹⁸ Some continuing resolutions last weeks, others cover months, and full-year versions effectively replace the regular appropriations bills. They generally freeze funding at existing levels, which prevents agencies from starting new programs or expanding current ones.

If neither regular appropriations nor a continuing resolution is in place, a funding gap occurs and agencies must shut down all activities that aren’t legally excepted. The Antideficiency Act drives this outcome, since agencies can’t obligate funds they don’t have. Certain functions continue during a shutdown:

Work directly connected to the immediate safety of human life or protection of property, but not routine functions whose suspension wouldn’t create an imminent threat.
Programs where a specific statute authorizes obligations in advance of appropriations.
Functions necessary for the President to exercise constitutional powers such as commanding the military or conducting foreign relations.

Furloughed employees are entitled to back pay once appropriations are restored, whether they worked during the shutdown or not.¹³

When the President Tries to Withhold Appropriated Funds

Once Congress appropriates money, the executive branch is generally expected to spend it. When a President has tried to withhold it for policy reasons, the Impoundment Control Act of 1974 sets the boundaries.

To permanently cancel appropriated spending, the President must send a special rescission message to Congress identifying the amount, the affected programs, and the reasons for the proposed cut. The funds can be withheld for up to 45 days of continuous congressional session. If Congress doesn’t pass a rescission bill within that window, the money must be released for obligation, and funds released this way can’t be proposed for rescission again.¹⁹

Deferrals work differently. A President can propose temporarily delaying the obligation of funds, but only to provide for contingencies, to achieve savings from greater efficiency, or where specifically authorized by law. Deferrals cannot extend beyond the end of the fiscal year in which they’re proposed.²⁰ A rescission tries to kill spending permanently. A deferral only delays it within the current year.

Who Audits Federal Spending

The Government Accountability Office audits federal financial statements to check whether agencies have properly accounted for taxpayer dollars, whether internal controls are adequate to prevent fraud and payment errors, and whether spending complied with the laws that limit how agencies use their money.²¹

Beyond auditing, GAO issues legal opinions on specific appropriations questions, such as whether a particular use of no-year funds was permissible or whether an agency’s contract crossed the bona fide needs rule. These decisions build a body of precedent that financial managers rely on when navigating gray areas in appropriations law.²²

1
Congress.gov. Article I Section 9 Clause 7 – Appropriations
2
Legal Information Institute. US Constitution Annotated – ArtI.S9.C7.1 Overview of the Appropriations Clause
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U.S. Treasury Fiscal Data. Federal Spending
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Congress.gov. Distinguishing Between Discretionary and Mandatory Spending
5
United States Senate Committee on Appropriations. Budget Process
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Congress.gov. Basic Federal Budgeting Terminology
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house.gov. Glossary of Terms
8
U.S. GAO. General Services Administration – Availability of No-Year Appropriations for a Modification of an Interagency Order
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Office of the Law Revision Counsel. 31 USC 1552 – Procedure for Appropriation Accounts Available for Definite Periods
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Office of the Law Revision Counsel. 31 USC 1301 – Application
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Office of the Law Revision Counsel. 31 USC 1502 – Balances Available
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U.S. Government Accountability Office. Department of Health and Human Services – Multiyear Contracting and the Bona Fide Needs Rule
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Office of the Law Revision Counsel. 31 USC 1341 – Limitations on Expending and Obligating Amounts
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Office of the Law Revision Counsel. 31 USC 1342 – Limitation on Voluntary Services
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Office of the Law Revision Counsel. 31 USC 1349 – Adverse Personnel Actions
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Office of the Law Revision Counsel. 31 USC 1350 – Criminal Penalty
17
Office of the Law Revision Counsel. 31 USC 1351 – Reports on Violations
18
U.S. GAO. What Is a Continuing Resolution and How Does It Impact Government Operations
19
Office of the Law Revision Counsel. 2 USC 683 – Rescission of Budget Authority
20
Congress.gov. The Impoundment Control Act of 1974
21
U.S. GAO. GAO Follows the Money – Everything You Should Know About Our Audits of Federal Financial Statements
22
U.S. Government Accountability Office. Role as an Audit Institution