Appropriations Bill

An appropriations bill is a law Congress passes to authorize government spending for specific agencies and purposes during the fiscal year. Congress passes (or attempts to pass) 12 appropriations bills each year, covering Defense, Interior, Labor, Health and Human Services, and other major functions.

How appropriations bills work

The US federal budget divides spending into two categories:

Mandatory spending: Set by law (Social Security, Medicare, entitlements). Congress authorized these programs years ago; they run on autopilot, spending whatever is needed to serve eligible beneficiaries.

Discretionary spending: Agencies must request funding, and Congress must explicitly authorize (appropriate) it each year. This includes defense, infrastructure, education, research, and countless other programs.

An appropriations bill is Congress’s tool for authorizing discretionary spending. For each agency covered, the bill specifies:

• How much the agency may spend (in total)
• Sub-allocations to different programs within the agency
• Restrictions on how money can be used
• Policy riders (unrelated provisions Congress wants to include)

The 12 appropriations bills

Ideally, Congress passes 12 bills covering:

1. Defense
2. Interior
3. Agriculture
4. Commerce, Justice, and Science
5. Transportation and Housing
6. State Department and Foreign Operations
7. Labor, Health and Human Services, Education
8. Legislative Branch
9. Military Construction and Veterans
10. Homeland Security
11. Financial Services
12. Energy and Water

Each bill is negotiated separately, allowing focused debate on spending priorities for that area.

The appropriations process

The process ideally works like this:

1. Spring: Federal agencies submit budget requests for the next fiscal year.
2. Summer: Congressional appropriations committees debate bills.
3. August: Committees mark up bills and pass them to the full chamber.
4. September: Both chambers pass their versions; conference committees resolve differences.
5. September 30: Final bills are signed before the fiscal year ends.

In reality, partisan gridlock, policy disputes, and scheduling conflicts often delay the process, forcing Congress to use continuing resolutions or omnibus bills instead.

Appropriations and policy

While appropriations bills are ostensibly about funding levels, they are also used for policy:

Policy riders: Congress attaches provisions to appropriations bills that are unrelated to spending. A rider might restrict abortion funding, prevent a regulation, or mandate a study. Because rejecting the appropriations bill means halting government, riders often pass even if they would struggle to pass as standalone legislation.

Spending restrictions: An appropriations bill can specify how agencies can use money, restricting spending on controversial programs or requiring approval for major initiatives.

This dual role — funding and policymaking — makes appropriations bills politically charged.

Appropriations vs. authorization

Appropriations are often confused with authorization. An authorization bill allows a program to exist and sets its size; an appropriations bill actually funds it. Congress must authorize first, then appropriate. If Congress authorizes a program but does not appropriate funds, the program cannot operate.

This gives Congress two levers over programs: authorization (creates the program) and appropriations (funds it).

See also