How a bill becomes law, and how to follow one

The path in seven steps

1. Introduction. A member of the House or Senate introduces a bill. It gets a number and is sent to a committee.
2. Committee. The committee can hold hearings, change the text in a "markup," and vote on whether to send it to the full chamber. Many bills stop here.
3. Floor. The full House or Senate debates and votes. Each chamber has its own rules for how and when.
4. Other chamber. The other chamber repeats the process. It may pass the same text or a different version.
5. Reconciling differences. If the two versions differ, they must be made identical, often through a conference committee or by one chamber accepting the other's version.
6. President. The President signs the bill into law or vetoes it. If the President does nothing for ten days (not counting Sundays) while Congress is in session, it becomes law without a signature.
7. Veto override. Congress can override a veto with a two-thirds vote of both chambers.

How to read a bill number

A bill number such as H.R. 1 or S. 100 shows where it started. H.R. means House of Representatives and S. means Senate. Joint resolutions (H.J.Res., S.J.Res.) can become law, while simple and concurrent resolutions generally do not. Numbers restart every two years with a new Congress. The 119th Congress covers 2025 and 2026.

Where to look

• Status and actions. Congress.gov shows every step a bill has taken, with dates.
• Summaries. The Congressional Research Service writes nonpartisan summaries, often after a bill has moved forward.
• Cost. The Congressional Budget Office estimates what many bills would cost or save. Not every bill gets a cost estimate.
• Votes. Roll-call votes list how each member voted.

Tips for following a bill

• A bill's title often describes its goal, not its contents. Read the summary or the text.
• Being introduced is only the first step. Many bills never get a committee vote.
• Large bills can carry unrelated provisions, so check what a bill actually changes.
• Bills can be folded into larger ones, so a topic you care about may move under a different bill number.

Try it yourself

Reviewed November 2026. Educational information, not tax, legal or financial advice. All guides