It consists of six subfamilies: Psittrichasinae, Agapornithinae, Loriinae, Platycercinae, Psittacellinae and Psittaculinae.

The tree is based on the work by Leo Joseph and collaborators published in 2012 but with the choice of families and the number of species in each family taken from the list maintained by Frank Gill, Pamela Rasmussen and David Donsker on behalf of the International Ornithological Committee (IOC), now the International Ornithologists' Union.

[1][2] Joseph and collaborators proposed that the genera Psittrichas and Coracopsis should be placed in their own family, Psittrichasiidae.

[1] This proposal has not been adopted by taxonomists involved in curating lists of the world birds and instead these two genera are included in an expanded family Psittaculidae.

[2] The following cladogram showing the generic relationships is based on a molecular phylogenetic study by Brian Smith and collaborators that was published in 2023.