Prior to 2012, even a (new) party that had not participated in the elections was permitted to form a parliamentary group.
The constituent sitting for the 1990–1994 parliamentary term included announcements on the formation of six parliamentary groups (the Hungarian Democratic Forum (MDF), Alliance of Free Democrats (SZDSZ), Independent Smallholders, Agrarian Workers and Civic Party (FKgP), Hungarian Socialist Party (MSZP), Alliance of Young Democrats (Fidesz) and Christian Democratic People's Party (KDNP)), but the FKgP group later split (one of the two groups subsequently ceased to exist) and the Party of Hungarian Justice and Life (MIÉP) established a new group.
The 1994–1998 term likewise began with the formation of six parliamentary groups (MSZP, SZDSZ, MDF, FKgP, KDNP and Fidesz, later renamed Fidesz–Hungarian Civic Party); however, the group for the Hungarian Democratic People's Party split off from the MDF and the KDNP group was dissolved before the term ended.
The constituent sitting for the 1998–2002 term witnessed the establishment of six parliamentary groups once again (Fidesz, MSZP, FKgP, SZDSZ, MDF and MIÉP), and the distribution remained unchanged up to the end of the term for the first time since 1990. No new group emerged nor were any of them dissolved, but the FKgP group lost the bulk of its members (by expulsion or resignation). Attempts to form groups with two to three members also failed, and no new groups were established.
The constituent sitting for the 2002–2006 term saw the creation of only four parliamentary groups (the MSZP and SZDSZ groups on the governing side and the FIDESZ and MDF groups in the opposition), and, although resignations and expulsions occurred, the four groups continued to operate throughout the term.
Five parliamentary groups announced their formation at the constituent sitting for the 2006–2010 term, including two groups for the governing coalition (MSZP and SZDSZ) and three in the opposition (Fidesz, KDNP and MDF). (Although the KDNP and Fidesz had run joint candidates and nominated a joint list, the two parties established separate groups in Parliament.) The SZDSZ left the governing coalition on 30 April 2008, and its parliamentary group became part of the opposition. The MDF group, which had operated without interruption since 1990, was dissolved in March 2009. There were no attempts by Members to form a new group during this term.
Five parliamentary groups were announced at the constituent sitting for the 2010–2014 term, including two groups for the governing coalition (Fidesz and KDNP) and three in the opposition (MSZP, Jobbik and Politics Can Be Different (LMP)). Fidesz and the KDNP allied their groups. There was a failed attempt by ten Members who had left the MSZP group to establish a separate group (the Democratic Coalition (DK)). In February 2013, eight Members resigned from the LMP group, which then ceased to exist. An amendment to the provisions of the Rules of Procedure allowed seven LMP Members to re-establish their group in September 2012.
The constituent sitting for the 2014–2018 term saw the formation of five parliamentary groups, including two from the governing coalition (Fidesz and KDNP) and three from the opposition (MSZP, Jobbik and LMP).