The legislature is currently (as of 2021[update]) made up of 136 deputies,[1] elected all at once in closed party lists for terms of 4 years.

In 2007, this fact moved President Esperanza Aguirre to propose splitting the Community of Madrid into twelve constituencies[2] of 9 to 15 AMs each.

Eventually, the proposal was abandoned even though President Aguirre had the majority to pass it through the Assembly, because it would be defeated in the Cortes Generales as it had to be done through a process of reform of the Charter of Autonomy.

Parties that obtain more than 5AMs can form a parliamentary group, in order to organise and participate in the debates and committees of the assembly.

The Bureau is tasked with managing the Assembly schedule and interpreting its rules of order, including the power to expel members from the sessions.