How a Bill Becomes Law: A Plain-English Walkthrough

Every year thousands of bills are introduced in Congress, yet only a small share becomes law. The process is deliberately demanding, designed to require debate and broad agreement. Understanding the main steps makes it easier to follow the news and to know when and how to make your voice heard.

Step 1: Introduction

Any member of the House of Representatives or Senate can introduce a bill. Revenue bills must begin in the House. The bill is assigned a number, such as H.R. 1234 in the House or S. 567 in the Senate, and referred to the committee with jurisdiction over its subject.

Step 2: Committee Review

Committees do much of the detailed work. They may hold hearings to hear from experts and the public, then hold a markup session to amend the bill. The committee can vote to send it to the full chamber, or it can decline to act, which effectively ends the bill's chances. Many bills never get past this stage.

Step 3: Floor Debate and Vote

If a bill is reported out of committee, it is scheduled for debate by the full chamber. In the House, a Rules Committee sets the terms of debate. In the Senate, debate is generally less limited, and ending debate on many bills requires a supermajority vote known as cloture. A simple majority is then needed to pass the bill.

Step 4: The Other Chamber

The bill then goes through the same steps in the second chamber, with its own committee review, amendments and vote. If the second chamber passes it without changes, it goes to the president. If the versions differ, the two chambers must reconcile them.

Step 5: Resolving Differences

Differences can be resolved by one chamber agreeing to the other's version, by passing amendments back and forth, or by a conference committee that negotiates a compromise. Both chambers must approve the final text.

Step 6: The President's Decision

• Sign: The bill becomes law.
• Veto: The president returns the bill with objections. Congress can override a veto with a two-thirds vote in both chambers.
• Take no action: If Congress is in session, the bill becomes law after ten days, excluding Sundays. If Congress adjourns during that time, the bill does not become law, which is called a pocket veto.

Why Most Bills Do Not Pass

With so many steps, bills can stall at many points. Competing priorities, limited floor time and disagreements over details all play a role. Sometimes provisions are folded into larger bills instead.

How You Can Take Part

You can read bill text and track progress on Congress.gov, contact your representatives and attend public hearings or town halls. Constituent input is often most useful while a bill is still in committee.