How Cloture Functions in Senate Proceedings

Updated: October 26, 2026

Cloture is the only procedure in the Senate’s standing rules that forces debate to end. Sixteen senators sign a cloture motion, it waits for one intervening day of session, and on most bills it succeeds only with three-fifths of the full Senate — 60 votes when no seat is vacant. Once cloture is invoked, the measure can be considered for no more than 30 further hours and every amendment must be germane. Nominations are different: since precedents set in 2013 and 2017, cloture on any nomination needs only a majority of senators voting.

This guide is the reference for the cloture rule itself: the timetable, the thresholds, how the rule has changed since 1917, how often it is used, and how to read a cloture vote in the official record. The tactic that cloture answers — extended debate — is covered in our guide to how filibusters work in the Senate, and the far more common way the Senate avoids cloture altogether is described in our explainer on unanimous consent.

Cloture at a glance

How a cloture motion moves, step by step

1. Filing. The majority leader or another senator presents the motion with at least 16 signatures. The question it targets must already be pending — a motion to proceed to a bill, an amendment, the bill itself, or a nomination.
2. Ripening. The motion lies over until the second calendar day of session. Business continues in the meantime; filing does not stop debate.
3. The live quorum and the vote. One hour after the Senate convenes on that day, the presiding officer establishes that a quorum is present and the Senate votes without further debate. In practice the quorum call and the timing are often waived by unanimous consent so the vote can be scheduled at a convenient hour.
4. Post-cloture. If the threshold is met, the clock starts: up to 30 hours on legislation, two hours on most lower-level nominations. Only germane amendments filed before the deadlines can be offered.
5. The final vote. Cloture does not pass anything. The Senate still has to vote on the underlying question, which in most cases needs only a simple majority.

Because each stage of a bill can be debated separately, a contested measure can require several cloture votes: one on the motion to proceed, one on a substitute amendment and one on the bill. That is why a single piece of legislation can absorb a week or more of floor time even when 60 senators support it from the start.

A worked example: one bill, four cloture votes

The Infrastructure Investment and Jobs Act, H.R. 3684 in the 117th Congress, shows the whole sequence. The Senate’s official cloture table and roll-call records give the dates and tallies below.

Three lessons follow from those rows. First, a failed cloture vote is not the end of a bill: the Senate can reconsider the vote once negotiators have a text, which is what happened a week later. Second, absences do not lower the bar. On August 7 only 94 senators voted, yet cloture still needed 60 yeas, because the post-1975 standard counts senators “duly chosen and sworn,” not senators present. Third, passage itself was a separate majority vote two days after cloture on the bill. The measure then went back to the House, which agreed to the Senate amendment 228–206 on November 5, 2021; it was signed on November 15, 2021, as Public Law 117-58. Our guide to the stages of a bill in Congress follows the same measure through both chambers.

How the threshold has changed: a timeline

• March 1917 — The Senate adopts Rule XXII. For the first time a supermajority, two-thirds of senators voting, can end debate. Before 1917 the rules offered no way to force a vote.
• November 15, 1919 — Cloture is invoked for the first time, 78–16, during debate on the Treaty of Versailles. The treaty itself was rejected four days later.
• June 10, 1964 — Cloture is invoked 71–29 (Roll Call Vote No. 281) on the Civil Rights Act, H.R. 7152, after some 60 days of debate. With all 100 senators voting, two-thirds meant 67 yeas.
• 1975 — The threshold for most matters drops from two-thirds of senators voting to three-fifths of senators duly chosen and sworn: 60 of 100. Rules changes keep the two-thirds requirement.
• November 21, 2013 — By precedent, the Senate allows cloture on executive-branch and lower-court nominations by a majority of senators voting.
• April 6, 2017 — The majority threshold is extended to Supreme Court nominations.
• April 3, 2019 — Post-cloture time on most sub-Cabinet executive nominations and on district-court nominations is cut from 30 hours to two.
• September 2025 — A further precedent lets the Senate take up groups of eligible sub-Cabinet executive nominations en bloc through an executive resolution, with cloture on that resolution by majority vote. Judicial nominations are not eligible.

The 2013, 2017 and 2019 changes were made by precedent — a ruling of the chair overturned on appeal by a simple majority — rather than by amending the text of Rule XXII. The legislative threshold of 60 has not been changed that way. Who rules on these questions, and how the chair is advised, is explained in our guide to the Senate parliamentarian.

How often cloture is used

The Secretary of the Senate keeps a running count of cloture motions for every Congress since 1917. The totals include nominations as well as bills, which is one reason the numbers rose after 2013.

Two patterns stand out. The number of motions filed roughly quintupled between the 109th Congress (68) and the 117th (336). And the success rate changed: in the 114th Congress cloture was invoked on fewer than half of the votes taken (60 of 123), while in the 117th it was invoked on 270 of 289. A high success rate does not mean less conflict; once most cloture votes concern nominations that need only a majority, failures become rare.

What cloture does not do

• It does not pass the measure. Cloture ends debate; passage is a separate vote, usually by simple majority.
• It is not needed for budget reconciliation. Debate on a reconciliation bill is capped by statute at 20 hours (10 on a conference report or an exchange of amendments), so it reaches a final vote without cloture. The trade-off is the restriction on what such a bill may contain, explained in our guides to budget reconciliation and the Byrd rule.
• It has no House equivalent. The House limits debate through special rules from its Rules Committee, adopted by majority vote. See our explainer on how the powers of the House and Senate differ.
• It does not guarantee amendment votes. After cloture only germane amendments that were filed on time are in order, and the majority leader can often fill the available amendment slots first.

How to read a cloture vote yourself

Three official records answer most questions about a specific vote:

• The roll-call vote page on senate.gov shows the question (“On the Cloture Motion”), the result (“Cloture Motion Agreed to” or “Rejected”), the vote number and how each senator voted. Count the yeas against 60, not against the number voting.
• The cloture table for each Congress lists every motion with the date filed, the measure or nomination, the vote day, the tally and a result code: I = invoked, F = failed, W = withdrawn, V = vitiated, N = no action. A motion marked W or V never reached a vote, often because senators reached a time agreement instead.
• The Congressional Record for the filing day prints the motion with its 16 signatures, and the vote day shows any consent agreement that moved the vote’s time.

When a news report says a bill “cleared a procedural hurdle,” it usually means one of these votes. Check which question was being clotured — a motion to proceed, an amendment or the bill — because a measure can clear the first and still fail at the last.

Frequently asked questions