Sponsorship and Cosponsorship of 
House Bills 
Betsy Palmer 
Analyst on Congress and the Legislative Process 
November 24, 2010 
Congressional Research Service
7-5700 
www.crs.gov 
RS22477 
CRS Report for Congress
P
  repared for Members and Committees of Congress        
Sponsorship and Cosponsorship of House Bills 
 
Sponsorship of a Bill 
Representatives introduce bills in the House chamber by placing them in the clerk’s “hopper,” a 
box at the rostrum, when the House is in session. The original signature of the sponsor must 
appear on the measure when it is introduced. Cosponsors do not sign the bill; the sponsor need 
only submit a list of names when the bill is dropped in the hopper. Cosponsors commonly ask the 
sponsors to add their names to a bill to signal support for the measure. 
Members typically sponsor bills they support. On occasion, a Representative may introduce a bill 
as a courtesy, such as legislation proposed by the President or a senior Administration official. In 
such a case, the sponsor may designate the bill as introduced “by request.” As House Rule XII 
states, “When a bill or resolution is introduced ‘by request,’ those words shall be entered on the 
Journal and printed in the Congressional Record.” 
A sponsor may withdraw the measure he or she has placed in the hopper only until it receives a 
number and is referred to committee. Once referred, neither the sponsor nor any cosponsor nor 
any other Member may withdraw the bill, even by unanimous consent. The measure becomes the 
property of the House, and the House may act on it even if the sponsor resigns from the House, or 
dies. 
Cosponsorship of a Bill 
Representatives may cosponsor a bill either at the time of its introduction or subsequently. 
Members whose names are submitted with a bill at the time of introduction are commonly 
referred to as “original cosponsors.” Once a bill has been introduced, Members may add their 
names as cosponsors until the bill has been reported from all the committees to which it is 
referred (or been discharged from the committees). 
The names of added cosponsors appear in the Congressional Record and in any subsequent prints 
of the bill. Sponsors and cosponsors of bills and amendments may be found by searching the 
Legislative Information System (LIS), CRS’s online legislative resource. House Rule XII 
provides that a bill may be reprinted if 20 or more cosponsors have been added since the previous 
printing, and the primary sponsor submits a written request for the Speaker to reprint the bill. 
A cosponsor may also have his or her name removed from a bill until the last committee of 
referral has reported it. For this purpose, either the cosponsor or the primary sponsor of the bill 
must request unanimous consent on the House floor. 
Rules governing the number of cosponsors permitted on a bill have changed over the years. From 
1967 to 1979, House rules limited the number of cosponsors to 25 per bill, requiring the 
introduction of identical bills when the number of cosponsors exceeded 25. Since 1979, an 
unlimited number of cosponsors has been allowed. Private bills are prohibited from having 
cosponsors. 
Congressional Research Service 
1 
Sponsorship and Cosponsorship of House Bills 
 
Gaining Cosponsors 
Supporters of a bill often seek cosponsors in hope of demonstrating its popularity and improving 
its chances for passage. One of the most common techniques for soliciting support for a bill is the 
“Dear Colleague” letter, a mass mailing to selected or all Members. These letters are so called 
after the salutation with which they begin. 
No House rules or formal procedures govern “Dear Colleague” letters. They are, in effect, a 
sponsor’s advertisement for a bill (or, sometimes, an amendment). Typically, the letters briefly 
state the issue the bill addresses, its major components, and its policy importance, and include an 
appeal to join as a cosponsor. Almost always, they carry the name and phone number of a staff 
aide to contact. A new system for distributing “Dear Colleagues” through the Internet was 
implemented in the 110th Congress. (See CRS Report RL34636, “Dear Colleague” Letters: 
Current Practices, by Jacob R. Straus.) 
Before a bill is formally introduced, a Member or an aide acting at his or her direction, who 
wishes to become a cosponsor may contact the sponsoring Member’s office and request that his 
or her name be added to the bill. A form listing cosponsors is kept, usually by a staff aide, and 
submitted along with the bill at introduction. After the bill is introduced, a Member may also 
contact the sponsor’s office and ask to be listed as a cosponsor. The sponsor decides when to 
submit these additional cosponsors to the House Clerk for publication in the Congressional 
Record. 
 
Author Contact Information 
 
Betsy Palmer 
   
Analyst on Congress and the Legislative Process 
bpalmer@crs.loc.gov, 7-0381 
 
Acknowledgments 
This report was originally prepared by former CRS Specialist Richard C. Sachs. Please direct any inquiries 
to the listed author. 
 
Congressional Research Service 
2