When an employment contract states that a terminated employee will receive "three months salary" upon leaving, this typically includes all allowances that are part of their regular monthly pay, meaning the allowances will be calculated and included in the total three-month payout.
Most companies consider all allowances like housing allowance, transportation allowance, and dearness allowance as part of the total salary when calculating termination pay.
Always refer to the specific wording in your employment contract to confirm exactly what components are included in the "three months salary" calculation.