How a Bill Becomes Law
The step-by-step journey from idea to signed law.
Every law in America starts as a bill — a written proposal that any member of Congress can introduce. Of the thousands introduced each session, only a small fraction ever become law. Here's the journey.
Step 1: Introduction. A Representative or Senator drafts a bill and formally introduces it. House bills start with "H.R." (House of Representatives) and Senate bills start with "S." The bill gets a number (like H.R. 1) and is sent to the relevant committee.
Step 2: Committee Review. This is where most bills die. The committee chair decides whether to even consider the bill. If it moves forward, the committee holds hearings, invites expert testimony, and may "mark up" the bill — rewriting sections, adding amendments, or combining it with other proposals. If the committee votes to approve it, the bill moves forward. If not, it's effectively dead.
Step 3: Floor Vote. The bill goes to the full chamber (House or Senate) for debate and a vote. In the House, the Rules Committee sets the terms — how long debate lasts and which amendments are allowed. In the Senate, debate is less structured, and any Senator can try to block a vote through a "filibuster" (requiring 60 votes to overcome). If a majority votes yes, the bill passes that chamber.
Step 4: The Other Chamber. A bill must pass both the House and Senate in identical form. If the other chamber passes a different version, a "conference committee" of members from both chambers works out the differences. Both chambers then vote on the final version.
Step 5: The President. The President can sign the bill into law, veto it (sending it back to Congress), or do nothing. If the President vetoes it, Congress can override the veto with a two-thirds vote in both chambers — a high bar that rarely succeeds.
Most bills never make it past Step 2. Of roughly 5,000 bills introduced in a typical Congress, fewer than 100 become law. When you see a bill's status on this site — "In Committee," "Passed House," "Enacted into Law" — now you know where it is in this process.