The duties of the Vice-President are two-fold:
1. He is the ex-officio chairman of the Rajya Sabha
 2. He acts for the President when the office of the President is vacant. Even when the President is ill or otherwise unable to perform his duties, the Vice-President acts for him.

                    The Vice-President acts as President, during casual vacancy in the office of the President by reason of death, resignation or removal or otherwise, until a new President is elected as soon as practicable and, in no case, later than six months from the date of occurrence of the vacancy. When the President is unable to discharge his functions owing to absence, illness or any other cause, the Vice-President discharges those functions till the President resumes office. During this period, the Vice-President has all the powers, immunities and privileges of the President and receives emoluments and allowances payable to the President.