Congressional Pension Forfeiture Act of 2005 - Requires the Office of Personnel and Management (OPM) to prescribe regulations that prohibit eligibility in the governmental retirement system for a Member convicted of certain offenses that are: (1) committed by the individual while a Member, (2) related to the individual's service as a Member, and (3) committed during the 110th Congress or later. Refunds annuity contributions and deposits, excluding interest earned, to a convicted individual.
Defines "Member" as "the Vice President, a member of the Senate or the House of Representatives, a Delegate to the House of Representatives, and the Resident Commissioner from Puerto Rico."
Forfeits Thrift Savings Plan contributions made by the government for the benefit of an individual and all earnings attributed to such contributions as a result of the Member's conviction.