Monthly calculation index (MCI) (Kazakh: Айлық есептік көрсеткіш, romanized: Ailyq eseptık körsetkış (AEK); Russian: Месячный расчетный показатель, romanized: Mesyachnyi raschetnyi pokazatel' (MRP)) is an index used in Kazakhstan for calculating pensions, allowances and other social payments and also for incrementing fines and calculating taxes and other payments.
It is set annually by the law of the Republic on the Budget.