Deputies are elected for a term of four years under a proportional system intended to guarantee representation to the various territorial zones of Castile–La Mancha. The electoral constituency is at the level of each province, with provinces being assigned the following number of deputies as of 2015: Albacete, 6; Ciudad Real, 8; Cuenca, 5; Guadalajara, 5; and Toledo, 9.
Article 10 of the Statute of Autonomy states that elections will be convoked by the President of the Junta of Communities, following the General Electoral Regime (Régimen Electoral General), on the fourth Sunday in May every four years. This stands in contrast to the autonomous communities of the Basque Country, Catalonia, Galicia, Andalusia and the Valencian Community where the president has the power to call elections at any time.