How the legislative process works
A bill is a proposal for a new law or a change to an existing one. Any member of Congress can introduce a bill. To become law, it has to pass the House and Senate in the same form and be signed by the president.
A bill does not pass with one vote. It moves through committee review, floor debate, the other chamber, possible reconciliation, and presidential action. At each step, it can advance, stall, get rewritten, or die.
The legislative process turns a proposal into law. Most proposals never make it. The ones that do survive a series of gatekeepers designed to slow them down.
Key facts
- About 6% of introduced bills become law. Most proposals never make it to the finish line.
- Roughly 11,000 bills are introduced in each two-year Congress, but only a small share move far.
- More than 90% never get a committee hearing, which is often where a bill’s chances end.
- 36 standing committees act as early gatekeepers, deciding which bills get attention and which ones stop quietly.
- Congress can sometimes bypass the filibuster through reconciliation, which lowers the vote threshold from 60 to 51.
- Every federal law starts as a bill. House bills are labeled H.R. Senate bills are labeled S.
The 7 Steps From Bill to Law
1. Drafting
A bill begins as an idea. A member of Congress writes it, usually with help from staff, constituents, or advocacy groups. Constituents who contact their representative about a specific problem are often the starting point for legislation. About 11,000 bills are introduced each Congress.
2. Introduction
A senator or representative formally introduces the bill in their chamber. House bills are numbered H.R. Senate bills are S. The bill is published in the Congressional Record. Introduction does not guarantee any further action.
3. Committee review
Committee referral is the most lethal stage. The bill goes to one of 36 standing committees. In practice, the chair controls whether it gets a hearing. More than 90% of introduced bills never do.
If the chair schedules a hearing, the bill goes through testimony, debate, and markup, where members propose amendments and vote on changes. The committee then votes whether to send the bill to the full chamber.
“Committees are where the real legislative work happens. Bills are often changed beyond recognition, delayed indefinitely, or stopped entirely before they ever reach a full chamber vote.”
Northwestern Law Library, The Legislative Process
This is also where constituent pressure carries the most weight. Research on congressional offices shows that staff track contact on specific bills. A call to a committee member about a bill in their jurisdiction is harder to set aside than a general message to your own representative.
4. Floor debate and vote
If the committee advances the bill, it goes to the full chamber for debate. In the House, the Speaker controls floor time and a simple majority of 218 passes the bill. In the Senate, any senator can delay proceedings through unlimited debate unless 60 senators vote for cloture.
5. The other chamber
The bill moves to the second chamber and repeats the process from committee to floor vote. The second chamber can pass it unchanged, amend it, or ignore it entirely. A bill that passes the House but stalls in the Senate dies at the end of the two-year Congress.
6. Resolving differences
Both chambers must pass identical text. If they pass different versions, they negotiate through a conference committee (members from both chambers work out a final version) or an amendment exchange (one chamber accepts the other’s changes).
7. Presidential action
The president has 10 days to act. Sign the bill into law. Veto it and return it to Congress with objections. Or do nothing. If the president takes no action for 10 days while Congress is in session, the bill becomes law without a signature. If Congress adjourns during that window, the bill dies through a pocket veto, which cannot be overridden.
Where Most Bills Die
94% of introduced bills never become law. The sharpest drop happens before committee hearings. Most bills are filtered out long before they reach a vote.
| Stage | Bills remaining |
|---|---|
| Bills introduced | ~11,000 |
| Get a committee hearing | ~1,100 |
| Pass committee | ~550 |
| Pass one chamber | ~420 |
| Pass both chambers | ~310 |
| Signed into law | ~274 |
Approximate numbers per Congress. Source: GovTrack, Emory Law.
State legislatures pass about 25% of introduced bills. Congress passes about 6%.
House vs Senate: Different Rules, Different Power
How the two chambers handle bills differently
| Rule | House | Senate |
|---|---|---|
| Members | 435 | 100 |
| Majority to pass | 218 | 51 |
| Debate rules | Speaker controls floor time | Unlimited debate (filibuster) |
| To end debate | Simple majority | 60 votes (cloture) |
| Override a veto | 290 (two-thirds) | 67 (two-thirds) |
| Term length | 2 years | 6 years |
| Budget reconciliation | Simple majority | Simple majority (Byrd Rule applies) |
The 60-vote cloture threshold is the biggest gap between majority support and passage. 41 senators can block what 59 want. This is the filibuster.
| Category | Value |
|---|---|
| House pass | 218 |
| Senate pass | 51 |
| Senate cloture | 60 |
| House override | 290 |
| Senate override | 67 |
The 60-vote cloture threshold is why popular legislation dies in the Senate. Source: U.S. Constitution.
Budget reconciliation is the workaround. It allows the Senate to pass spending, revenue, and debt limit changes with 51 votes instead of 60. The trade-off: reconciliation bills must affect the federal budget and are subject to the Byrd Rule, which strips out provisions that don’t have a direct budgetary impact.
Vetoes and Overrides
The Constitution gives the president the power to reject legislation. Congress can override a veto, but it almost never does.
- 2,576
- total presidential vetoes since 1789
- 112
- overridden by Congress (7%)
- 1,066
- pocket vetoes (cannot be overridden)
A regular veto returns the bill to Congress with the president’s objections. Congress can override it with a two-thirds vote in both chambers: 290 in the House, 67 in the Senate. That threshold is high enough that 93% of vetoes stand.
A pocket veto is absolute. If Congress adjourns during the 10-day signing window and the president does not sign the bill, it dies. No override is possible. Presidents have used pocket vetoes 1,066 times.
Vetoes in the current Congress
Trump has vetoed two bills in his second term. Both passed Congress with bipartisan support through voice votes.
Vetoes in the 119th Congress (2025-2026)
| Bill | What it did | Override attempt |
|---|---|---|
| Arkansas Valley Conduit Act | Eased payments for a water pipeline in southeastern Colorado | Failed 248-177 (needed 290). Only 35 Republicans voted to override. |
| Miccosukee Reserved Area Act | Expanded tribal land in the Everglades | No override vote held |
Three Paths to Policy
Not all policy goes through the standard legislative process. Understanding the alternatives explains why some policies pass quickly and others never get a vote.
Regular legislation vs reconciliation vs executive action
| Regular legislation | Reconciliation | Executive action | |
|---|---|---|---|
| Senate votes needed | 60 (to break filibuster) | 51 | None |
| Scope | Any policy area | Budget, taxes, spending only | Executive branch operations |
| Durability | Permanent until repealed | Permanent until repealed | Next president can reverse |
| Times used | Standard process | 24 bills signed since 1980 | Varies by president |
Regular legislation is durable but requires 60 Senate votes. Reconciliation needs only 51 but is limited to budget matters. Executive action skips Congress but the next president can reverse it on day one.
How the Process Is Playing Out in 2025-2026
Reconciliation bypassed the filibuster
The One Big Beautiful Bill Act used reconciliation to pass $911 billion in Medicaid cuts, work requirements starting January 2027, and permanent extension of 2017 tax rates. The Senate passed it 51-50. The House passed it 218-214. Neither margin would have survived a filibuster.
Executive action bypassed Congress entirely
Trump invoked the Defense Production Act to spend $700 million propping up coal plants, declaring coal supply chains essential to national defense. No bill was introduced. No committee held a hearing. No vote was taken. The administration also dismantled a $368 million ocean monitoring network through an agency decision, not legislation, after Congress funded the program twice.
Discharge petitions surged
When leadership blocks a vote, 218 House members can sign a discharge petition to force one. Since 1935, only 7 discharge petitions have produced a law. But 7 petitions reached the 218-signature threshold under Speaker Johnson since 2023, matching the previous four decades combined. The Social Security Fairness Act passed this way in 2024 with a 352-75 House vote.
Not all paths to policy are equal
The legislative process is slow by design. Not every shortcut is a problem, and not every delay is obstruction.
- Reconciliation is not a loophole. It is a defined congressional process created by the Budget Act of 1974. Both parties use it. The Byrd Rule limits what it can contain. It requires majority votes in both chambers.
- Executive orders are not legislation. They direct the executive branch but do not create permanent law. The next president can reverse them. Some executive actions are appropriate uses of existing authority. Others stretch that authority beyond what Congress intended.
- Committee gatekeeping serves a purpose. The 90% of bills that never get a hearing includes duplicate proposals, messaging bills, and proposals without broad support. Not every bill deserves floor time. The problem is when popular legislation is blocked by a single chair.
- The filibuster is not in the Constitution. It is a Senate rule. It can be changed by a simple majority vote. Whether it should be changed is a legitimate policy debate, not a constitutional question.
Frequently asked questions
How many bills become law? About 6% of introduced bills. Roughly 11,000 bills are introduced per Congress and about 274 become law. The sharpest drop is at committee: more than 90% never get a hearing.
What is reconciliation? A process that allows the Senate to pass budget-related legislation with 51 votes instead of the 60 needed to overcome a filibuster. It is limited to spending, revenue, and debt limit changes. Both parties use it for major legislation (the Inflation Reduction Act, the One Big Beautiful Bill Act).
Can the president make a law without Congress? No. The president can issue executive orders directing the executive branch, but these are not laws. They can be reversed by the next president. For permanent law, Congress must act.
What is a discharge petition? A procedure allowing 218 House members to force a floor vote on a bill that leadership has blocked. Only 7 discharge petitions have produced laws since 1935, but 7 reached the signature threshold in the current Congress.
How does the filibuster work? Any senator can hold the floor indefinitely to delay a vote. Ending debate requires 60 votes (cloture). This means 41 senators can block legislation that a majority supports. See our filibuster explainer.
Where does constituent contact matter most? At the committee stage. Staff track constituent calls on specific bills. A call to a committee member about a bill in their jurisdiction is harder to ignore than a general message. 99% of staffers say in-person visits influence undecided lawmakers.
Where you fit in this process
The legislative process has multiple entry points for constituent pressure. The evidence says it works.
- 99%
- of staffers say in-person visits influence undecided lawmakers
- 90%
- say handwritten letters are influential
- 88%
- say personalized emails influence their lawmaker
- 37%
- more impact from personalized vs form emails
-
When a bill is introduced: contact your representative. Ask them to co-sponsor. Early support signals momentum to committee chairs.
-
When a bill is in committee: contact committee members directly. This is where most bills die and where call volume can push a chair to schedule a hearing.
-
When a bill reaches the floor: call your senator or representative. Staff track constituent sentiment on pending votes, especially close calls.
-
During conference: both your senator and representative have leverage. Tell them what the final bill should include.
-
After a veto: ask your members to vote to override. The two-thirds threshold is high, but constituent pressure on undecided members is how overrides happen.
Track bills and find your representatives at Congress.gov. Send letters through Resistbot (text RESIST to 50409) or Democracy.io. For ready-to-send letter templates on current legislation, see our letter library.