Legislative process7 min read

How a Bill Becomes Law

Follow a federal bill from introduction through committee, votes in the House and Senate, and action by the President.

Last reviewed September 3, 2026

The short version

A federal bill must clear several decision points before it becomes law. A member of the House or Senate introduces it, a committee usually studies and revises it, and both chambers must approve the same text. The President then signs the bill, allows it to become law without a signature, or vetoes it.

Most introduced bills do not complete that path. A bill can stop because a committee does not act, chamber leaders do not schedule it, the House and Senate approve different versions, or Congress cannot overcome a presidential veto. That is why a bill’s latest action is often more useful than its title alone.

1. Introduction and referral

Only members of Congress can formally introduce legislation. House bills use an H.R. number and Senate bills use an S. number. Joint resolutions can also become law through nearly the same process. After introduction, the measure is referred to one or more committees with jurisdiction over its subject.

Introduction is the starting line, not evidence that a proposal is close to passage. Look for the sponsor, cosponsors, committees, and recent actions to understand whether a measure is attracting support or moving forward.

2. Committee work

Committees and subcommittees may hold hearings, request information, debate the proposal, and mark up its text. A committee can report a bill to the full chamber with recommendations, or it can take no further action. Committee reports can be especially valuable because they explain the bill’s purpose, expected effects, and disagreements among members.

Some measures move through expedited procedures, and chamber rules can shape how much debate or amendment is allowed. The exact route varies, but committee activity remains one of the clearest signs that a bill is receiving serious consideration.

3. House and Senate passage

The House and Senate consider legislation under their own rules. Members may debate and amend the measure before voting. Passage in one chamber sends the bill to the other, where it may be approved, rejected, ignored, or changed.

A bill cannot go to the President until both chambers agree to identical wording. If they pass different versions, they can exchange amendments or use a conference committee to negotiate a compromise. Each chamber must then approve the final text.

4. Presidential action

After enrollment, the bill goes to the President. A signature makes it law. If the President takes no action for ten days, excluding Sundays, the result depends on whether Congress remains available to receive a veto: the bill can become law without a signature, or it can fail through a pocket veto when Congress has adjourned in a way that prevents return.

A regular veto sends the bill and the President’s objections back to Congress. Congress may override it with a two-thirds vote in both the House and Senate.

How to read a bill timeline

Read actions from newest to oldest and distinguish procedural steps from major milestones. Referral, hearings, committee reporting, chamber passage, resolving differences, and presidential action carry different weight. Also check the Congress number: legislation that did not become law generally does not carry over automatically into a new Congress.

Civixly bill pages pair the latest action with sponsor information and links to the official Congress.gov record. Use the official record for the authoritative text and Civixly to move between the bill and the people connected to it.

Common questions

Does a bill need 60 votes in the Senate?

Not always. Final passage commonly requires a simple majority, but ending debate on many matters can require three-fifths of the Senate under current cloture rules. Budget reconciliation and some nominations follow different procedures.

What happens when a Congress ends?

Bills that have not become law generally expire at the end of the two-year Congress. A similar proposal may be introduced again in the next Congress with a new bill number.

Is a resolution the same as a bill?

No. Joint resolutions can generally become law like bills, while concurrent and simple resolutions usually concern congressional operations or express views and do not become law.

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