Authorization vs. Appropriation: What's the Difference and Why Both Are Required

Washington runs most federal programs through two separate laws. The first says what a program is, what it may do, and how large it is allowed to grow. The second hands it a specific number of dollars for a specific year. People mix the two up constantly, partly because both pass through Congress, both carry dollar figures, and the press often calls either one "funding." Only one of them puts money in an agency's account.

This guide puts the two side by side, shows how they interact in the annual budget cycle, and explains how to tell which one you are reading when you open a bill.

What is the difference between an authorization and an appropriation?

The shorthand that holds up: authorization is permission, appropriation is money. An authorizing committee can tell the Navy it may build a new class of ship, create a rural broadband grant, or set the rules for a police hiring program. None of that buys a single hull or wires a single home. The program operates only at the size the appropriators fund, and they can fund it at the authorized level, below it, or not at all.

Key takeaways

• An appropriation is the only one of the two that gives an agency money to spend.
• The requirement for an appropriation is in the Constitution; the requirement for an authorization is in House and Senate rules.
• Expired authorizations do not stop funding. In 2026, Congress appropriated $494 billion for programs whose authorizations had expired.
• An authorized dollar amount is a ceiling, not a promise.
• The twelve bills Approps tracks are appropriations. The defense authorization, the farm bill, and water resources bills are authorizations, and they are not on the tracker.

Why both are required: the two step rule

The money half of the rule comes straight from the Constitution. Article I, Section 9, Clause 7 says: "No Money shall be drawn from the Treasury, but in Consequence of Appropriations made by Law." No appropriation, no spending. That is why a lapse in appropriations shuts agencies down, and why the shutdown page watches the appropriations deadline and nothing else.

The authorization half comes from the chambers' own rules. House Rule XXI, clause 2 says an appropriation "may not be reported in a general appropriation bill, and may not be in order as an amendment thereto, for an expenditure not previously authorized by law." The same clause bars "a provision changing existing law" in a general appropriation bill, which is the formal version of the familiar warning against "legislating on an appropriations bill." A member who spots a violation can raise a point of order, and if it is sustained, the offending provision comes out.

The Senate's version is narrower. Senate Rule XVI mainly limits floor amendments that add unauthorized money to an appropriations bill. The Senate has no general ban on unauthorized appropriations in text written by its committee.

Why split the job at all? The design keeps the people who design a program from also writing its check, it lets subject experts on the authorizing committees write policy while the appropriators balance the whole government against a single spending total, and it gives Congress two separate chances to say no.

Can a program get money without an authorization?

Yes. An appropriation for an unauthorized program is still a valid law once it is enacted. The authorization requirement is a rule of procedure inside each chamber, not a condition the Constitution places on spending. The Government Accountability Office has put it plainly: "the enacted appropriation, in effect, carries its own authorization," and the money is available for obligation and spending.

What stands in the way inside the House is the point of order, and the House routinely waives it. The Rules Committee writes a special rule for each appropriations bill it sends to the floor, and those rules often waive points of order against the whole bill or against specific provisions. Unanimous consent and suspension of the rules can do the same.

There are exceptions. A handful of statutes, such as the Department of Energy Organization Act, expressly require an authorization before money can be appropriated for certain activities. Those are the exception, not the rule.

Why do some programs get funded even after their authorization expires?

Because the authorization lapsing does not turn the program off. Usually what expires is the authorization of appropriations, the line that says how much money is authorized for which years. The program's underlying legal authority often has no end date at all. As long as the appropriators keep writing a check, the program runs.

The scale is large. The Congressional Budget Office's final report on expired authorizations, published August 28, 2026, found:

• 1,447 authorizations of appropriations had expired before fiscal year 2026 began.
• 512 of them still received 2026 appropriations, totaling $494 billion.
• About $309 billion of that went to programs whose authorizations expired more than a decade ago. The oldest dates to 1980.
• 23 major laws account for $440 billion of the total.

Three forces keep this pattern going. First, appropriations must pass every year or the government shuts down, while an authorization can sit expired with no immediate consequence. Second, reopening an authorization reopens every policy fight attached to it, so committees often decide the status quo is easier. Third, the appropriators are the ones who feel the deadline, so they keep programs alive rather than let veterans' hospitals or the State Department go dark over a procedural gap.

Can a program be authorized but not funded?

Yes, and it happens all the time. An authorization of appropriations is a ceiling. Congress may provide less, or nothing, even when the authorizing law says a program should get "not less than" a certain amount. An agency left without money for a duty it was assigned cannot move funds from another account to cover it unless a law gives it that authority.

The CHIPS and Science Act of 2022 is a recent example. It authorized $15.6 billion for the National Science Foundation in fiscal year 2024. The House and Senate spending bills that year offered about $9.6 billion and $9.5 billion, close to 40 percent below the authorized level, according to the Federation of American Scientists. The authorization was a statement of intent. The appropriation set the real budget.

How authorizations and appropriations interact in the annual process

The two tracks run in parallel each year, and they rarely finish in the order the textbook suggests.

1. The President's budget request arrives in February and proposes amounts for every account. It binds no one.
2. Authorizing committees hold oversight hearings and may move reauthorizations. A few, like the defense bill, move every year. Most do not.
3. The Appropriations Committees receive their overall spending ceiling, the 302(a) allocation, divide it among the twelve subcommittees, and mark up the bills. Under House Rule XIII, the House Appropriations Committee's report on each bill must list the appropriations in it that are not authorized by law, along with the last year each was authorized.
4. On the House floor, unauthorized items are exposed to points of order unless the special rule waives them.
5. The final bills become law, often months after the fiscal year starts, while agencies run on a continuing resolution.

Defense is the cleanest illustration. The FY2026 National Defense Authorization Act, the 65th consecutive annual NDAA, was signed on December 18, 2025, as P.L. 119-60. It set policy and authorized funding levels for the Pentagon, and it did not provide a dollar. The money arrived seven weeks later, when the Defense appropriations title of P.L. 119-75 became law on February 3, 2026, with $838.6 billion in discretionary budget authority. Defense money also flows through two other appropriations bills: military construction in the MilCon-VA bill and nuclear weapons work at the Energy Department in the Energy and Water bill.

Water projects show the same split from a different angle. The Water Resources Development Act authorizes specific Army Corps of Engineers projects. The Energy and Water appropriations bill funds them. The House Appropriations Committee's earmark rules accept Corps requests only for projects that already have an authorization. You can browse the Corps projects that made it into the bills in the Energy and Water project ledger.

Where mandatory spending fits

Some authorizing laws skip the annual check entirely. Social Security, Medicare's hospital insurance, and federal retirement are paid under permanent appropriations written into the authorizing law itself, so the money flows each year without an appropriations vote. That is mandatory spending, also called direct spending, and it is controlled by the authorizing committees. A few large entitlements, such as Medicaid and the general fund share of Medicare, are funded through annual appropriations bills even though their size is set by the authorizing law. The full picture is in discretionary vs. mandatory spending.

How to spot authorization and appropriation language in a bill

When you open a bill on congress.gov, a few phrases tell you which kind of law you are reading.

Limitation riders are the main way appropriators shape policy without rewriting authorizing law. The Hyde Amendment, which has restricted federal funding for abortion through the Labor-HHS-Education bill since 1976, is the best known example: it changes nothing in the underlying health laws, it only says the money in that bill cannot be used for a certain purpose.

How this shows up on Approps

• The tracker follows appropriations only. The twelve bills on the tracker are the annual appropriations bills. Authorizing bills like the NDAA, the farm bill, or WRDA do not appear there, even when they carry big dollar figures, because they do not provide annual discretionary appropriations. The farm bill does provide some money directly, as mandatory spending, which runs on a separate track.
• Every project sits inside an appropriations account. On each bill's project page, earmarks are grouped by department, agency, and account. Each account is a line of appropriated money, and the guides House offices give to applicants say projects "will only receive funding for purposes authorized by Congress."
• The history is in the archive. The archive shows how each of the twelve bills actually became law from FY2020 through FY2026, by public law and date.
• The process, end to end. How the appropriations process works walks through the full cycle from the budget request to a signed law, and what the authorizing committees do covers the other side of the split.