Parliamentary threshold is the threshold of votes used to decide whether a political party gets a seat in the Indonesian House of Representatives. Historically, parliamentary threshold has experienced a change in numbers starting from 2.5% in the 2009 Election to 4% in the 2024 Election. This study uses normative legal research. Data was collected through literature studies (library research) and analyzed descriptively analytically. The Constitutional Court's decision stated parliamentary threshold conditionally unconstitutional results in the parliamentary threshold in the 2029 Election having to be reviewed. Changes to the parliamentary threshold are in the shadow of the current grand coalition in the Indonesian House of Representatives. So the parliamentary threshold that will be reviewed in the 2029 Election could remain at 4% or more than 4% in accordance with the agreement made in the grand coalition of the Indonesian House of Representatives for the 2024-2029 period. This is reinforced because the Constitutional Court's decision only ordered a review, but did not rigidly order the current parliamentary threshold to be lowered.